I’ve been banging my head against the wall for background Android notifications for a longtime. They just were not re-opening the app, when tapped. I’m using cordova-plugin-firebasex.

To get them to work, you need to edit AndroidManifest.xml and change this line

<activity android:excludeFromRecents="true" android:exported="true" android:name="org.apache.cordova.firebase.OnNotificationReceiverActivity" android:noHistory="true" android:taskAffinity="" android:theme="@android:style/Theme.Translucent.NoTitleBar"/>

To this….

<activity android:excludeFromRecents="true" android:exported="true" android:name="org.apache.cordova.firebase.OnNotificationReceiverActivity" android:noHistory="true" android:taskAffinity="" android:theme="@android:style/Theme.Translucent.NoTitleBar">             <intent-filter>                 <action android:name="MYCLICKACTIVITY" />                 <category android:name="android.intent.category.DEFAULT" />             </intent-filter>         </activity>

You also need ‘click_action’:’MYCLICKACTIVITY’ in the android > notification json sent to Firebase!

Don’t do a Cordova Build Android, because it will change it back!

I’ve founded it quicker to only do a cordova build when changing plugins etc. Otherwise it’s quicker to copy and past the JS or CSS files in Android Studio.