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menu__link--sublist menu__link--sublist-caret" role=button aria-expanded=false href=/docs/legacy/native-modules-intro>Legacy Architecture</a></div></ul></nav></div></div></aside><main class=docMainContainer_a9sJ><div class="container padding-top--md padding-bottom--lg"><div class=row><div class="col docItemCol_Qr34"><div class=docItemContainer_tjFy><article><div class="tocCollapsible_wXna theme-doc-toc-mobile tocMobile_Ojys"><button type=button class="clean-btn tocCollapsibleButton_iI2p">On this page</button></div><div class="theme-doc-markdown markdown"><header><h1>Headless JS</h1></header><p>Headless JS is a way to run tasks in JavaScript while your app is in the background. It can be used, for example, to sync fresh data, handle push notifications, or play music.</p>
5<h2 class="anchor anchorWithStickyNavbar_JmGV" id=the-js-api>The JS API<a href=#the-js-api class=hash-link aria-label="Direct link to The JS API" title="Direct link to The JS API"></a></h2>
6<p>A task is an async function that you register on <code>AppRegistry</code>, similar to registering React applications:</p>
7<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token imports punctuation" style=color:#657b83>{</span><span class="token imports maybe-class-name">AppRegistry</span><span class="token imports punctuation" style=color:#657b83>}</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>from</span><span class="token plain"> </span><span class="token string" style=color:#8dc891>'react-native'</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token maybe-class-name">AppRegistry</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method function property-access" style=color:#79b6f2>registerHeadlessTask</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>'SomeTaskName'</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>require</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>'SomeTaskName'</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div>
8<p>Then, in <code>SomeTaskName.js</code>:</p>
9<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token plain">module</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method-variable function-variable method function property-access" style=color:#79b6f2>exports</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>async</span><span class="token plain"> taskData </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// do stuff</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div>
10<p>You can do anything in your task such as network requests, timers and so on, as long as it doesn't touch UI. Once your task completes (i.e. the promise is resolved), React Native will go into "paused" mode (unless there are other tasks running, or there is a foreground app).</p>
11<h2 class="anchor anchorWithStickyNavbar_JmGV" id=the-platform-api>The Platform API<a href=#the-platform-api class=hash-link aria-label="Direct link to The Platform API" title="Direct link to The Platform API"></a></h2>
12<p>Yes, this does still require some native code, but it's pretty thin. You need to extend <code>HeadlessJsTaskService</code> and override <code>getTaskConfig</code>, e.g.:</p>
13<div class="tabs-container tabList_J5MA"><ul role=tablist aria-orientation=horizontal class=tabs><li role=tab tabindex=0 aria-selected=true class="tabs__item tabItem_l0OV tabs__item--active">Java<li role=tab tabindex=-1 aria-selected=false class="tabs__item tabItem_l0OV">Kotlin</ul><div class=margin-top--md><div role=tabpanel class=tabItem_wHwb><div class="language-java codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>java</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-java codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>package</span><span class="token plain"> </span><span class="token namespace" style=opacity:0.7>com</span><span class="token namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token namespace" style=opacity:0.7>your_application_name</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>android</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>content</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>Intent</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>android</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>os</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>Bundle</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>com</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>facebook</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>react</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>HeadlessJsTaskService</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>com</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>facebook</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>react</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>bridge</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>Arguments</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>com</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>facebook</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>react</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>jstasks</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>HeadlessJsTaskConfig</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>javax</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>annotation</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>Nullable</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>public</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>class</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>MyTaskService</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>extends</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>HeadlessJsTaskService</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token annotation punctuation" style=color:#657b83>@Override</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>protected</span><span class="token plain"> </span><span class="token annotation punctuation" style=color:#657b83>@Nullable</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>HeadlessJsTaskConfig</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>getTaskConfig</span><span class="token punctuation" style=color:#657b83>(</span><span class="token class-name" style=color:#fac863>Intent</span><span class="token plain"> intent</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Bundle</span><span class="token plain"> extras </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> intent</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>getExtras</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>if</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">extras </span><span class="token operator" style=color:#fc929e>!=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>null</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>new</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>HeadlessJsTaskConfig</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token string" style=color:#8dc891>"SomeTaskName"</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Arguments</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>fromBundle</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">extras</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token number" style=color:#5a9bcf>5000</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// timeout in milliseconds for the task</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// optional: defines whether or not the task is allowed in foreground. Default is false</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>null</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><br></span></code></pre></div></div></div><div role=tabpanel class=tabItem_wHwb hidden><div class="language-kotlin codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>kotlin</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-kotlin codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>package</span><span class="token plain"> com</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">your_application_name</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> android</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">content</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">Intent</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> com</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">facebook</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">react</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">HeadlessJsTaskService</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> com</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">facebook</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">react</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">bridge</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">Arguments</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> com</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">facebook</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">react</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">jstasks</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">HeadlessJsTaskConfig</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>class</span><span class="token plain"> MyTaskService </span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>HeadlessJsTaskService</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>override</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>fun</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>getTaskConfig</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">intent</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> Intent</span><span class="token punctuation" style=color:#657b83>)</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> HeadlessJsTaskConfig</span><span class="token operator" style=color:#fc929e>?</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> intent</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">extras</span><span class="token operator" style=color:#fc929e>?</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>let</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token function" style=color:#79b6f2>HeadlessJsTaskConfig</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token string-literal singleline string" style=color:#8dc891>"SomeTaskName"</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> Arguments</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>fromBundle</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">it</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token number" style=color:#5a9bcf>5000</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// timeout for the task</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// optional: defines whether or not the task is allowed in foreground.</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// Default is false</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span></code></pre></div></div></div></div></div>
14<p>Then add the service to your <code>AndroidManifest.xml</code> file inside the <code>application</code> tag:</p>
15<div class="language-xml codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>xml</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-xml codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token tag punctuation" style=color:#657b83><</span><span class="token tag" style=color:#fc929e>service</span><span class="token tag" style=color:#fc929e> </span><span class="token tag attr-name namespace" style=color:#c5a5c5;opacity:0.7>android:</span><span class="token tag attr-name" style=color:#c5a5c5>name</span><span class="token tag attr-value punctuation attr-equals" style=color:#657b83>=</span><span class="token tag attr-value punctuation" style=color:#657b83>"</span><span class="token tag attr-value" style=color:#8dc891>com.example.MyTaskService</span><span class="token tag attr-value punctuation" style=color:#657b83>"</span><span class="token tag" style=color:#fc929e> </span><span class="token tag punctuation" style=color:#657b83>/></span><br></span></code></pre></div></div>
16<p>Now, whenever you <a href=https://developer.android.com/reference/android/content/Context.html#startService(android.content.Intent) target=_blank rel="noopener noreferrer">start your service</a>, e.g. as a periodic task or in response to some system event / broadcast, JS will spin up, run your task, then spin down.</p>
17<p>Example:</p>
18<div class="tabs-container tabList_J5MA"><ul role=tablist aria-orientation=horizontal class=tabs><li role=tab tabindex=0 aria-selected=true class="tabs__item tabItem_l0OV tabs__item--active">Java<li role=tab tabindex=-1 aria-selected=false class="tabs__item tabItem_l0OV">Kotlin</ul><div class=margin-top--md><div role=tabpanel class=tabItem_wHwb><div class="language-java codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>java</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-java codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token class-name" style=color:#fac863>Intent</span><span class="token plain"> service </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>new</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Intent</span><span class="token punctuation" style=color:#657b83>(</span><span class="token function" style=color:#79b6f2>getApplicationContext</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>MyTaskService</span><span class="token punctuation" style=color:#657b83>.</span><span class="token keyword" style=color:#c5a5c5>class</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token class-name" style=color:#fac863>Bundle</span><span class="token plain"> bundle </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>new</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Bundle</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">bundle</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>putString</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string" style=color:#8dc891>"foo"</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token string" style=color:#8dc891>"bar"</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">service</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>putExtras</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">bundle</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token function" style=color:#79b6f2>getApplicationContext</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>startForegroundService</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">service</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div></div><div role=tabpanel class=tabItem_wHwb hidden><div class="language-kotlin codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>kotlin</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-kotlin codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>val</span><span class="token plain"> service </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>Intent</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">applicationContext</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> MyTaskService</span><span class="token operator" style=color:#fc929e>::</span><span class="token keyword" style=color:#c5a5c5>class</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">java</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>val</span><span class="token plain"> bundle </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>Bundle</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">bundle</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>putString</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string-literal singleline string" style=color:#8dc891>"foo"</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token string-literal singleline string" style=color:#8dc891>"bar"</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">service</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>putExtras</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">bundle</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">applicationContext</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>startForegroundService</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">service</span><span class="token punctuation" style=color:#657b83>)</span><br></span></code></pre></div></div></div></div></div>
19<h2 class="anchor anchorWithStickyNavbar_JmGV" id=retries>Retries<a href=#retries class=hash-link aria-label="Direct link to Retries" title="Direct link to Retries"></a></h2>
20<p>By default, the headless JS task will not perform any retries. In order to do so, you need to create a <code>HeadlessJsRetryPolicy</code> and throw a specific <code>Error</code>.</p>
21<p><code>LinearCountingRetryPolicy</code> is an implementation of <code>HeadlessJsRetryPolicy</code> that allows you to specify a maximum number of retries with a fixed delay between each attempt. If that does not suit your needs then you can implement your own <code>HeadlessJsRetryPolicy</code>. These policies can be passed as an extra argument to the <code>HeadlessJsTaskConfig</code> constructor, e.g.</p>
22<div class="tabs-container tabList_J5MA"><ul role=tablist aria-orientation=horizontal class=tabs><li role=tab tabindex=0 aria-selected=true class="tabs__item tabItem_l0OV tabs__item--active">Java<li role=tab tabindex=-1 aria-selected=false class="tabs__item tabItem_l0OV">Kotlin</ul><div class=margin-top--md><div role=tabpanel class=tabItem_wHwb><div class="language-java codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>java</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-java codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token class-name" style=color:#fac863>HeadlessJsRetryPolicy</span><span class="token plain"> retryPolicy </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>new</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>LinearCountingRetryPolicy</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token number" style=color:#5a9bcf>3</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// Max number of retry attempts</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token number" style=color:#5a9bcf>1000</span><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// Delay between each retry attempt</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>new</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>HeadlessJsTaskConfig</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> '</span><span class="token class-name" style=color:#fac863>SomeTaskName</span><span class="token plain">'</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Arguments</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>fromBundle</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">extras</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token number" style=color:#5a9bcf>5000</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> retryPolicy</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div></div><div role=tabpanel class=tabItem_wHwb hidden><div class="language-kotlin codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>kotlin</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-kotlin codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>val</span><span class="token plain"> retryPolicy</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> HeadlessJsTaskRetryPolicy </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token function" style=color:#79b6f2>LinearCountingRetryPolicy</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token number" style=color:#5a9bcf>3</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// Max number of retry attempts</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token number" style=color:#5a9bcf>1000</span><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// Delay between each retry attempt</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>HeadlessJsTaskConfig</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string-literal singleline string" style=color:#8dc891>"SomeTaskName"</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> Arguments</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>fromBundle</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">extras</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token number" style=color:#5a9bcf>5000</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> retryPolicy</span><span class="token punctuation" style=color:#657b83>)</span><br></span></code></pre></div></div></div></div></div>
23<p>A retry attempt will only be made when a specific <code>Error</code> is thrown. Inside a headless JS task, you can import the error and throw it when a retry attempt is required.</p>
24<p>Example:</p>
25<div class="language-tsx codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>tsx</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-tsx codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token known-class-name class-name" style=color:#fac863>HeadlessJsTaskError</span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>from</span><span class="token plain"> </span><span class="token string" style=color:#8dc891>'HeadlessJsTask'</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain">module</span><span class="token punctuation" style=color:#657b83>.</span><span class="token method-variable function-variable method function property-access" style=color:#79b6f2>exports</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>async</span><span class="token plain"> taskData </span><span class="token arrow operator" style=color:#fc929e>=></span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>const</span><span class="token plain"> condition </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token spread operator" style=color:#fc929e>...</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>if</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token operator" style=color:#fc929e>!</span><span class="token plain">condition</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>throw</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>new</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>HeadlessJsTaskError</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><span class="token punctuation" style=color:#657b83>;</span><br></span></code></pre></div></div>
26<p>If you wish all errors to cause a retry attempt, you will need to catch them and throw the above error.</p>
27<h2 class="anchor anchorWithStickyNavbar_JmGV" id=caveats>Caveats<a href=#caveats class=hash-link aria-label="Direct link to Caveats" title="Direct link to Caveats"></a></h2>
28<ul>
29<li>By default, your app will crash if you try to run a task while the app is in the foreground. This is to prevent developers from shooting themselves in the foot by doing a lot of work in a task and slowing the UI. You can pass a fourth <code>boolean</code> argument to control this behaviour.</li>
30<li>If you start your service from a <code>BroadcastReceiver</code>, make sure to call <code>HeadlessJsTaskService.acquireWakeLockNow()</code> before returning from <code>onReceive()</code>.</li>
31</ul>
32<h2 class="anchor anchorWithStickyNavbar_JmGV" id=example-usage>Example Usage<a href=#example-usage class=hash-link aria-label="Direct link to Example Usage" title="Direct link to Example Usage"></a></h2>
33<p>Service can be started from Java API. First you need to decide when the service should be started and implement your solution accordingly. Here is an example that reacts to network connection change.</p>
34<p>Following lines shows part of Android manifest file for registering broadcast receiver.</p>
35<div class="language-xml codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>xml</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-xml codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token tag punctuation" style=color:#657b83><</span><span class="token tag" style=color:#fc929e>receiver</span><span class="token tag" style=color:#fc929e> </span><span class="token tag attr-name namespace" style=color:#c5a5c5;opacity:0.7>android:</span><span class="token tag attr-name" style=color:#c5a5c5>name</span><span class="token tag attr-value punctuation attr-equals" style=color:#657b83>=</span><span class="token tag attr-value punctuation" style=color:#657b83>"</span><span class="token tag attr-value" style=color:#8dc891>.NetworkChangeReceiver</span><span class="token tag attr-value punctuation" style=color:#657b83>"</span><span class="token tag" style=color:#fc929e> </span><span class="token tag punctuation" style=color:#657b83>></span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token tag punctuation" style=color:#657b83><</span><span class="token tag" style=color:#fc929e>intent-filter</span><span class="token tag punctuation" style=color:#657b83>></span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token tag punctuation" style=color:#657b83><</span><span class="token tag" style=color:#fc929e>action</span><span class="token tag" style=color:#fc929e> </span><span class="token tag attr-name namespace" style=color:#c5a5c5;opacity:0.7>android:</span><span class="token tag attr-name" style=color:#c5a5c5>name</span><span class="token tag attr-value punctuation attr-equals" style=color:#657b83>=</span><span class="token tag attr-value punctuation" style=color:#657b83>"</span><span class="token tag attr-value" style=color:#8dc891>android.net.conn.CONNECTIVITY_CHANGE</span><span class="token tag attr-value punctuation" style=color:#657b83>"</span><span class="token tag" style=color:#fc929e> </span><span class="token tag punctuation" style=color:#657b83>/></span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token tag punctuation" style=color:#657b83></</span><span class="token tag" style=color:#fc929e>intent-filter</span><span class="token tag punctuation" style=color:#657b83>></span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token tag punctuation" style=color:#657b83></</span><span class="token tag" style=color:#fc929e>receiver</span><span class="token tag punctuation" style=color:#657b83>></span><br></span></code></pre></div></div>
36<p>Broadcast receiver then handles intent that was broadcasted in onReceive function. This is a great place to check whether your app is on foreground or not. If app is not on foreground we can prepare our intent to be started, with no information or additional information bundled using <code>putExtra</code> (keep in mind bundle can handle only parcelable values). In the end service is started and wakelock is acquired.</p>
37<div class="tabs-container tabList_J5MA"><ul role=tablist aria-orientation=horizontal class=tabs><li role=tab tabindex=0 aria-selected=true class="tabs__item tabItem_l0OV tabs__item--active">Java<li role=tab tabindex=-1 aria-selected=false class="tabs__item tabItem_l0OV">Kotlin</ul><div class=margin-top--md><div role=tabpanel class=tabItem_wHwb><div class="language-java codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>java</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-java codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>android</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>app</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>ActivityManager</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>android</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>content</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>BroadcastReceiver</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>android</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>content</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>Context</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>android</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>content</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>Intent</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>android</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>net</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>ConnectivityManager</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>android</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>net</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>Network</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>android</span><span class="token import 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style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>android</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>os</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>Build</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> </span><span class="token import namespace" style=opacity:0.7>com</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>facebook</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import namespace" style=opacity:0.7>react</span><span class="token import namespace punctuation" style=opacity:0.7;color:#657b83>.</span><span class="token import class-name" style=color:#fac863>HeadlessJsTaskService</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>public</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>class</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>NetworkChangeReceiver</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>extends</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>BroadcastReceiver</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token annotation punctuation" style=color:#657b83>@Override</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>public</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>void</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>onReceive</span><span class="token punctuation" style=color:#657b83>(</span><span class="token keyword" style=color:#c5a5c5>final</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Context</span><span class="token plain"> context</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>final</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Intent</span><span class="token plain"> intent</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>/**</span><br></span><span class=token-line style=color:#FFFFFF><span class="token comment" style=color:#93a1a1> This part will be called every time network connection is changed</span><br></span><span class=token-line style=color:#FFFFFF><span class="token comment" style=color:#93a1a1> e.g. Connected -> Not Connected</span><br></span><span class=token-line style=color:#FFFFFF><span class="token comment" style=color:#93a1a1> **/</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>if</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token operator" style=color:#fc929e>!</span><span class="token function" style=color:#79b6f2>isAppOnForeground</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">context</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>/**</span><br></span><span class=token-line style=color:#FFFFFF><span class="token comment" style=color:#93a1a1> We will start our service and send extra info about</span><br></span><span class=token-line style=color:#FFFFFF><span class="token comment" style=color:#93a1a1> network connections</span><br></span><span class=token-line style=color:#FFFFFF><span class="token comment" style=color:#93a1a1> **/</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>boolean</span><span class="token plain"> hasInternet </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>isNetworkAvailable</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">context</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Intent</span><span class="token plain"> serviceIntent </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>new</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Intent</span><span class="token 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punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> context</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>startForegroundService</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">serviceIntent</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token class-name" style=color:#fac863>HeadlessJsTaskService</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>acquireWakeLockNow</span><span class="token punctuation" style=color:#657b83>(</span><span 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comment" style=color:#93a1a1> **/</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token class-name" style=color:#fac863>ActivityManager</span><span class="token plain"> activityManager </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token class-name" style=color:#fac863>ActivityManager</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> context</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>getSystemService</span><span class="token punctuation" style=color:#657b83>(</span><span class="token class-name" style=color:#fac863>Context</span><span class="token punctuation" style=color:#657b83>.</span><span class="token constant" 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plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>public</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>static</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>boolean</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>isNetworkAvailable</span><span class="token punctuation" style=color:#657b83>(</span><span class="token class-name" style=color:#fac863>Context</span><span class="token plain"> context</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token class-name" style=color:#fac863>ConnectivityManager</span><span class="token plain"> cm </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token class-name" style=color:#fac863>ConnectivityManager</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> context</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>getSystemService</span><span class="token punctuation" style=color:#657b83>(</span><span class="token class-name" style=color:#fac863>Context</span><span class="token punctuation" style=color:#657b83>.</span><span class="token constant" style=color:#5a9bcf>CONNECTIVITY_SERVICE</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>if</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token class-name" style=color:#fac863>Build</span><span class="token punctuation" style=color:#657b83>.</span><span class="token constant" style=color:#5a9bcf>VERSION</span><span class="token punctuation" style=color:#657b83>.</span><span class="token constant" style=color:#5a9bcf>SDK_INT</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>>=</span><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Build</span><span class="token class-name punctuation" style=color:#657b83>.</span><span class="token class-name" style=color:#fac863>VERSION_CODES</span><span class="token class-name punctuation" style=color:#657b83>.</span><span class="token class-name" style=color:#fac863>M</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token class-name" style=color:#fac863>Network</span><span class="token plain"> networkCapabilities </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> cm</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>getActiveNetwork</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>if</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">networkCapabilities </span><span class="token operator" style=color:#fc929e>==</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>null</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token class-name" style=color:#fac863>NetworkCapabilities</span><span class="token plain"> actNw </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> cm</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>getNetworkCapabilities</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">networkCapabilities</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>if</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">actNw </span><span class="token operator" style=color:#fc929e>==</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>null</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>if</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">actNw</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>hasTransport</span><span class="token punctuation" style=color:#657b83>(</span><span class="token class-name" style=color:#fac863>NetworkCapabilities</span><span class="token punctuation" style=color:#657b83>.</span><span class="token constant" style=color:#5a9bcf>TRANSPORT_WIFI</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>||</span><span class="token plain"> actNw</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>hasTransport</span><span class="token punctuation" style=color:#657b83>(</span><span class="token class-name" style=color:#fac863>NetworkCapabilities</span><span class="token punctuation" style=color:#657b83>.</span><span class="token constant" style=color:#5a9bcf>TRANSPORT_CELLULAR</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>||</span><span class="token plain"> actNw</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>hasTransport</span><span class="token punctuation" style=color:#657b83>(</span><span class="token class-name" style=color:#fac863>NetworkCapabilities</span><span class="token punctuation" style=color:#657b83>.</span><span class="token constant" style=color:#5a9bcf>TRANSPORT_ETHERNET</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>true</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// deprecated in API level 29</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token class-name" style=color:#fac863>NetworkInfo</span><span class="token plain"> netInfo </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> cm</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>getActiveNetworkInfo</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">netInfo </span><span class="token operator" style=color:#fc929e>!=</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>null</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>&&</span><span class="token plain"> netInfo</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>isConnected</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>;</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><br></span></code></pre></div></div></div><div role=tabpanel class=tabItem_wHwb hidden><div class="language-kotlin codeBlockContainer_mQmQ theme-code-block" style=--prism-color:#FFFFFF;--prism-background-color:#282C34><div class=codeBlockTitle_kY6l>kotlin</div><div class=codeBlockContent_t_Hd><pre tabindex=0 class="prism-code language-kotlin codeBlock_RMoD thin-scrollbar" style=color:#FFFFFF;background-color:#282C34><code class=codeBlockLines_AclH><span class=token-line style=color:#FFFFFF><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> android</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">app</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">ActivityManager</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> android</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">app</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">ActivityManager</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">RunningAppProcessInfo</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> android</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">content</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">BroadcastReceiver</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> android</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">content</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">Context</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> android</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">content</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">Intent</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> android</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">net</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">ConnectivityManager</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> android</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">net</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">NetworkCapabilities</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> android</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">os</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">Build</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>import</span><span class="token plain"> com</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">facebook</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">react</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">HeadlessJsTaskService</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token keyword" style=color:#c5a5c5>class</span><span class="token plain"> NetworkChangeReceiver </span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>BroadcastReceiver</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>override</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>fun</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>onReceive</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">context</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> Context</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> intent</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> Intent</span><span class="token operator" style=color:#fc929e>?</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>/**</span><br></span><span class=token-line style=color:#FFFFFF><span class="token comment" style=color:#93a1a1> * This part will be called every time network connection is changed e.g. Connected -> Not</span><br></span><span class=token-line style=color:#FFFFFF><span class="token comment" style=color:#93a1a1> * Connected</span><br></span><span class=token-line style=color:#FFFFFF><span class="token comment" style=color:#93a1a1> */</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>if</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token operator" style=color:#fc929e>!</span><span class="token function" style=color:#79b6f2>isAppOnForeground</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">context</span><span class="token punctuation" style=color:#657b83>)</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>/** We will start our service and send extra info about network connections */</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>val</span><span class="token plain"> hasInternet </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>isNetworkAvailable</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">context</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>val</span><span class="token plain"> serviceIntent </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>Intent</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">context</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> MyTaskService</span><span class="token operator" style=color:#fc929e>::</span><span class="token keyword" style=color:#c5a5c5>class</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">java</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> serviceIntent</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>putExtra</span><span class="token punctuation" style=color:#657b83>(</span><span class="token string-literal singleline string" style=color:#8dc891>"hasInternet"</span><span class="token punctuation" style=color:#657b83>,</span><span class="token plain"> hasInternet</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> context</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>startForegroundService</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">serviceIntent</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> HeadlessJsTaskService</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>acquireWakeLockNow</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">context</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>private</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>fun</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>isAppOnForeground</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">context</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> Context</span><span class="token punctuation" style=color:#657b83>)</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> Boolean </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>/**</span><br></span><span class=token-line style=color:#FFFFFF><span class="token comment" style=color:#93a1a1> * We need to check if app is in foreground otherwise the app will crash.</span><br></span><span class=token-line style=color:#FFFFFF><span class="token comment" style=color:#93a1a1> * https://stackoverflow.com/questions/8489993/check-android-application-is-in-foreground-or-not</span><br></span><span class=token-line style=color:#FFFFFF><span class="token comment" style=color:#93a1a1> */</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>val</span><span class="token plain"> activityManager </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> context</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>getSystemService</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">Context</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">ACTIVITY_SERVICE</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>as</span><span class="token plain"> ActivityManager</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>val</span><span class="token plain"> appProcesses </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> activityManager</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">runningAppProcesses </span><span class="token operator" style=color:#fc929e>?:</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>val</span><span class="token plain"> packageName</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> String </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> context</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>getPackageName</span><span class="token punctuation" style=color:#657b83>(</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>for</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">appProcess </span><span class="token keyword" style=color:#c5a5c5>in</span><span class="token plain"> appProcesses</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>if</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">appProcess</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">importance </span><span class="token operator" style=color:#fc929e>==</span><span class="token plain"> RunningAppProcessInfo</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">IMPORTANCE_FOREGROUND </span><span class="token operator" style=color:#fc929e>&&</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> appProcess</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">processName </span><span class="token operator" style=color:#fc929e>==</span><span class="token plain"> packageName</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>true</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>companion</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>object</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>fun</span><span class="token plain"> </span><span class="token function" style=color:#79b6f2>isNetworkAvailable</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">context</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> Context</span><span class="token punctuation" style=color:#657b83>)</span><span class="token operator" style=color:#fc929e>:</span><span class="token plain"> Boolean </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>val</span><span class="token plain"> cm </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> context</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>getSystemService</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">Context</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">CONNECTIVITY_SERVICE</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>as</span><span class="token plain"> ConnectivityManager</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>var</span><span class="token plain"> result </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>if</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">Build</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">VERSION</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">SDK_INT </span><span class="token operator" style=color:#fc929e>>=</span><span class="token plain"> Build</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">VERSION_CODES</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">M</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>val</span><span class="token plain"> networkCapabilities </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> cm</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">activeNetwork </span><span class="token operator" style=color:#fc929e>?:</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>val</span><span class="token plain"> actNw </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"> cm</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>getNetworkCapabilities</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">networkCapabilities</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>?:</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> result </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>when</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> actNw</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>hasTransport</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">NetworkCapabilities</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">TRANSPORT_WIFI</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>-></span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>true</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> actNw</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>hasTransport</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">NetworkCapabilities</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">TRANSPORT_CELLULAR</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>-></span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>true</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> actNw</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>hasTransport</span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">NetworkCapabilities</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">TRANSPORT_ETHERNET</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>-></span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>true</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>else</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>-></span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> result</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>else</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> cm</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>run</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token comment" style=color:#93a1a1>// deprecated in API level 29</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> cm</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">activeNetworkInfo</span><span class="token operator" style=color:#fc929e>?</span><span class="token punctuation" style=color:#657b83>.</span><span class="token function" style=color:#79b6f2>run</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> result </span><span class="token operator" style=color:#fc929e>=</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>when</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>(</span><span class="token plain">type</span><span class="token punctuation" style=color:#657b83>)</span><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>{</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> ConnectivityManager</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">TYPE_WIFI </span><span class="token operator" style=color:#fc929e>-></span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>true</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> ConnectivityManager</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">TYPE_MOBILE </span><span class="token operator" style=color:#fc929e>-></span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>true</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> ConnectivityManager</span><span class="token punctuation" style=color:#657b83>.</span><span class="token plain">TYPE_ETHERNET </span><span class="token operator" style=color:#fc929e>-></span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>true</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>else</span><span class="token plain"> </span><span class="token operator" style=color:#fc929e>-></span><span class="token plain"> </span><span class="token boolean" style=color:#ff8b50>false</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token keyword" style=color:#c5a5c5>return</span><span class="token plain"> result</span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"> </span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain"></span><span class="token punctuation" style=color:#657b83>}</span><span class="token plain"></span><br></span><span class=token-line style=color:#FFFFFF><span class="token plain" style=display:inline-block></span><br></span></code></pre></div></div></div></div></div></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class=editButtons_t0bR><a href=https://github.com/facebook/react-native-website/edit/main/docs/headless-js-android.md target=_blank rel="noopener noreferrer" class=theme-edit-this-page><svg 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