问题
I am trying to get the Android BroadcastReceiver to run when a Firebase Cloud message notification is received by the Android system.
public class MyBroadcastReceiver extends BroadcastReceiver {
private static final String TAG = "MyBroadcastReceiver";
@Override
public void onReceive(final Context context, Intent intent) {
Toast.makeText(context, "EVENT OCCURED", Toast.LENGTH_LONG).show();
}
}
It is required in the AndroidManifest to specify receiver tags as such:
<receiver
android:name=".MyBroadcastReceiver" android:exported="true">
<intent-filter>
<action android:name="android.intent.action.ACTION_POWER_CONNECTED"/>
<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</receiver>
As you can see in the Manifest above I've added:
<action android:name="android.intent.action.ACTION_POWER_CONNECTED"/>
to make sure the BroadcastReceiver fires when I plug cable to Android device. It works fine.
Therefore the issue lies with the:
<action android:name="com.google.firebase.MESSAGING_EVENT" />
Is this intent-filter action not recognized by the BroadcastReceiver? Is there another intent-filter action for Firebase messaging the BroadcastReceiver uses?
回答1:
The Android Intent messaging system processes Intents in three "channels": Activities, Services and BroadcastReceivers. The methods for publishing an Intent indicate the channel type: startActivity(), startService() and sendBroadcast(). An intent published with startService() will only match the intent filter of a Service. It is not tested against Activities and BroadcastReceivers.
Because action com.google.firebase.MESSAGING_EVENT is normally received by a Service derived from FirebaseMessagingService, it must be the case that the action is published in the Service channel. You will not be able to receive it with a BroadcastReceiver.
来源：https://stackoverflow.com/questions/44286497/what-firebase-cloud-messaging-intent-filter-to-use-for-a-broadcastreceiver