keep BroadcastReceiver alive after onReceive

Question

I have CallReceiver extends BroadcastReceiver class which records phone calls via MediaRecorder instance.
The problem is each time my service receives intent new instance of PhoneCallReceiver is created with unitialized recorder.
Therefore I can't stop recording.Of course I can store recorder instance in the static variable but this is dirty hack.
I believe there must be way to keep service alive
Here is my receiver class:

public class CallReceiver extends PhoneCallReceiver {
    private static VoiceRecorder recorder; // VoiceRecorder stores MediaRecorder instance 
    @Override
    protected void onIncomingCallReceived(Context ctx, String number, Date start)
    {
        Log.d("phone","onIncomingCallReceived");
    }

    @Override
    protected void onIncomingCallAnswered(Context ctx, String number, Date start)
    {
        Log.d("phone","onIncomingCallAnswered");
        MainActivity.recorder=new VoiceRecorder("incoming_"+number);
        try {
            MainActivity.recorder.start();
        } catch (IOException e) {
            Log.d("phone error",e.getLocalizedMessage());
            e.printStackTrace();
        }
    }

    @Override
    protected void onIncomingCallEnded(Context ctx, String number, Date start, Date end)
    {
        Log.d("phone","onIncomingCallEnded");
        if (MainActivity.recorder!=null) {
            try {
                MainActivity.recorder.stop();
            } catch (Exception e) {
                Log.d("phone record error",e.getLocalizedMessage());
                e.printStackTrace();
            }
            MainActivity.recorder=null;
        }
    }

    @Override
    protected void onOutgoingCallStarted(Context ctx, String number, Date start)
    {
        Log.d("phone","onOutgoingCallStarted "+MainActivity.recorder);
        MainActivity.recorder=new VoiceRecorder("outgoing_"+number);
        try {
            MainActivity.recorder.start();
        } catch (IOException e) {
            Log.d("phone error",e.getLocalizedMessage());
            e.printStackTrace();
        }
    }

    @Override
    protected void onOutgoingCallEnded(Context ctx, String number, Date start, Date end)
    {
        Log.d("phone","onOutgoingCallEnded "+MainActivity.recorder);
        if (MainActivity.recorder!=null) {
            try {
                MainActivity.recorder.stop();
            } catch (IOException e) {
                e.printStackTrace();
            }
            MainActivity.recorder=null;
        }
    }

    @Override
    protected void onMissedCall(Context ctx, String number, Date start)
    {
        Log.d("phone","onMissedCall");
    }

}

Answer 1

Your PhoneCallReceiver should not have a MediaRecorder. It should delegate to a foreground service that has a MediaRecorder. The service can remain stable. A BroadcastReceiver registered in the manifest lives for just one onReceive() call, by way of comparison.