[Q] BroadcastReceiver question - Android Q&A, Help & Troubleshooting

The first version of a small program. MyBroadcastReceiver is invoked by sendBroadcast(new Intent(MyBroadcastReceiver.ACTION)). It works.
Code:
package com.example.broadcast;
import android.app.Activity;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;
public class MyActivity extends Activity
{
private final BroadcastReceiver mBroadcastReceiver = new MyBroadcastReceiver();
private class MyBroadcastReceiver extends BroadcastReceiver
{
public static final String ACTION = "com.example.broadcast.MyBroadcastReceiver.ACTION";
@Override
public void onReceive(Context context, Intent intent)
{
Toast.makeText(context, "onReceive() fired", Toast.LENGTH_SHORT).show();
}
};
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
registerReceiver(mBroadcastReceiver, new IntentFilter(MyBroadcastReceiver.ACTION));
((Button)findViewById(R.id.testButton)).setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
sendBroadcast(new Intent(MyBroadcastReceiver.ACTION));
}
});
}
@Override
protected void onDestroy()
{
unregisterReceiver(mBroadcastReceiver);
super.onDestroy();
}
}
The second version of the same program. Now MyBroadcastReceiver is invoked by sendBroadcast(new Intent(MyActivity.this, MyBroadcastReceiver.class)) and IntentFilter in call to registerReceiver() is empty. It doesn't work. Why? And what do I have to change to make it work?
Code:
public class MyActivity extends Activity
{
private final BroadcastReceiver mBroadcastReceiver = new MyBroadcastReceiver();
private class MyBroadcastReceiver extends BroadcastReceiver
{
@Override
public void onReceive(Context context, Intent intent)
{
Toast.makeText(context, "onReceive() fired", Toast.LENGTH_SHORT).show();
}
};
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
registerReceiver(mBroadcastReceiver, new IntentFilter());
((Button)findViewById(R.id.testButton)).setOnClickListener(new View.OnClickListener()
{
public void onClick(View v)
{
sendBroadcast(new Intent(MyActivity.this, MyBroadcastReceiver.class));
}
});
}
@Override
protected void onDestroy()
{
unregisterReceiver(mBroadcastReceiver);
super.onDestroy();
}
}