Android Broadcast Security

Question

In android, you can set the action of a broadcast to almost anything (save system actions.) My question is how can you prevent other apps from spoofing your broadcasts? Say you

Answer 1

You can use LocalBroadcastManager https://developer.android.com/reference/android/support/v4/content/LocalBroadcastManager.html

Also you can define permission in the manifest. And use http://developer.android.com/reference/android/content/Context.html#sendBroadcast%28android.content.Intent,%20java.lang.String%29 to send broadcast, then only apps which requested your "com.a.b.c" permission will receive. But this is public api to your app, be careful this way.