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Add note to add the service to AndroidManifest

Summary:
If not you will try to start the service but nothing would happen

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Closes #14813

Differential Revision: D5384460

Pulled By: hramos

fbshipit-source-id: 6131d7901d3324da97672141c4774b7810051526
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LironErman authored and facebook-github-bot committed Jul 7, 2017
1 parent 9afb71f commit 6db97d638d5562fa69a44516b75ed80bbef97de9
Showing with 6 additions and 0 deletions.
  1. +6 −0 docs/HeadlessJSAndroid.md
@@ -52,6 +52,12 @@ public class MyTaskService extends HeadlessJsTaskService {
Now, whenever you [start your service][0], e.g. as a periodic task or in response to some system event / broadcast, JS will spin up, run your task, then spin down.
Remember to add the service to your `AndroidManifest` file:
```
<service android:name="com.example.MyTaskService" />
```
## Caveats
* 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. There is a way around this.

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