Dynamically registered BroadcastReceivers pattern

Sample.java

package net.roosmaa.example;

import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;

public class Sample
{
  private Context mContext;
  private BroadcastReceiver mMyReceiver;
  
  // ..
  
  /** Registeres the {@link MyReceiver} if it hasn't been registered yet. */
  private void registerReceiver()
  {
    if (mMyReceiver != null)
      return;
    
    mMyReceiver = new MyReceiver();
    mContext.registerReceiver(mMyReceiver, new IntentFilter("myAction"));
  }
  
  /** Unregisteres the {@link MyReceiver} if it was registered previously. */
  private void unregisterReceiver()
  {
    if (mMyReceiver == null)
      return;
    
    mContext.unregisterReceiver(mMyReceiver);
    mMyReceiver = null;
  }
  
  // ..
  
  private class MyReceiver extends BroadcastReceiver
  {
    @Override
    public void onReceive(Context context, Intent intent)
    {
      // Do whatever here
    }
  }
}