Explicitly addressing an Intent to a dynamically registered broadcast receiver

I am new to Android and trying to understand the communication between apps.

I am trying to write 3 little apps which can communicate with each other. If you want to send a message to everybody, you just use an implicit broadcast.

implicit Intent intent.setAction("com.example.myChatMessage")

If you want to address only 1 specific receiver, I did it with

explicit Intent intent.setComponent("com.example.test.android.broadcastreceiver.b", "com.example.test.android.broadcastreceiver.b.myBroadcastReceiver")

This works when the broadcast receiver is a seperate class and defined in the AndroidManifest.xml.

My Question: Is it possible to explicitly address a dynamically registered broadcast receiver?

package com.example.test.android.broadcastreceiver.b;

public class MainActivity extends Activity {

package com.example.test.android.broadcastreceiver.b;

public class MainActivity extends Activity {

    private final IntentFilter intentfilter = new IntentFilter("com.example.myChatMessage");
    private myBroadcastReceiver broadcastreceiver;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        broadcastreceiver = new myBroadcastReceiver();
        registerReceiver(broadcastreceiver, intentfilter);
    }

    public static class myBroadcastReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            String message = intent.getStringExtra("message");
            Log.d("message", "B received: " + message);
        }
    }
}

It receives all implicit broadcasts but no explicit one — I don't know how to addr