ACTION_MEDIA_BUTTON Receiver not Called after trying almost everything I could

Question

I want to call a function when MEDIA_BUTTON is clicked. But in extended BroadcastReceiver class Constructor is called but onReceive function is not called.

I have test this over a BluetoothDevice as it has no affect. by this

Content in Manifest.xml File

<uses-permission android:name="android.permission.BLUETOOTH" />

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/Theme.NotificationManager">
    <meta-data
        android:name="com.google.android.actions"
        android:resource="@xml/actions" />

    <activity android:name=".MainActivity">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <service
        android:name=".NotificationService"
        android:enabled="true"
        android:label="@string/app_name"
        android:permission="android.permission.BIND_NOTIFICATION_LISTENER_SERVICE">
        <intent-filter>
            <action android:name="android.service.notification.NotificationListenerService" />
        </intent-filter>
    </service>

    <receiver android:name=".MediaButtonIntentReceiver">
        <intent-filter android:priority="1000000000">
            <action android:name="android.intent.action.MEDIA_BUTTON" />
        </intent-filter>
    </receiver>

</application>

How I registered BroadcastReceiver in MainActivity.java

    IntentFilter filter = new IntentFilter(Intent.ACTION_MEDIA_BUTTON);
    MediaButtonIntentReceiver r = new MediaButtonIntentReceiver();
    registerReceiver(r, filter);

Content in MediaButtonIntentReceiver.java

    import android.content.BroadcastReceiver;
    import android.content.Context;
    import android.content.Intent;
    import android.util.Log;
    import android.view.KeyEvent;
    import android.widget.Toast;
    public class MediaButtonIntentReceiver extends BroadcastReceiver{
        private static final String TAG = "MediaButtonReceive";
        MediaButtonIntentReceiver(){
            super();
            Log.e(TAG, "Constructor Called"); //Also tried without Constructor.
        }

        public void onReceive(Context context, Intent intent) {
            Log.e(TAG, "In onReceive");       // It won't even print this.

            String intentAction = intent.getAction();
            if (Intent.ACTION_MEDIA_BUTTON.equals(intentAction)) {
                KeyEvent event = (KeyEvent) intent.getParcelableExtra(Intent.EXTRA_KEY_EVENT);

                if (event == null) {
                    return;
                }
                int keycode = event.getKeyCode();
                int action = event.getAction();

                if (keycode == KeyEvent.KEYCODE_MEDIA_PLAY_PAUSE || keycode == KeyEvent.KEYCODE_HEADSETHOOK) {
                    if (action == KeyEvent.ACTION_DOWN) {
                        Log.e(TAG, "Button Pressed");    //Call function here.
                        Toast.makeText(context, "Button pressed !!", Toast.LENGTH_SHORT).show();
                        if (isOrderedBroadcast()) {
                            abortBroadcast();
                        }
                    }
                }
            }
        }
    }

I have referred at least 8 Stack's answers but unable to solve this issue.

Answer 1

This is late but, The reason it wasn't working was Android's Update. From and later Android 8.0, Static Broadcast receiver will not function. You have to register it dynamically after launching application.