Android HandlerThread example usage

SampleHandlerThread.java

public class SampleActivity extends Activity implements Handler.Callback {
  private static final int MSG_START_OP = 1;
  private static final int MSG_PAUSE_OP = 2;
  private static final int MSG_SEND_ALIVE_OP = 3;
  
  private HandlerThread  mHT;
  private Handler        mMsgHandler;
  
  @Override
  void onCreate(Bundle savedInstance) {
    super.onCreate(savedInstance);
    setContextView(R.layout.sample_activity);
    
    //  Other setup
    
    mHT = new HandlerThread("Bg Msg Thread");
    mHT.start();
    mMsgHandler = new Handler(mHT.getLooper(), this);
  }

  @Override
  void onResume() {
    mMsgHandler.sendEmptyMessage(MSG_START_OP);
  }

  @Override
  void onPause() {
    //  Pause the POST messages
    mMsgHandler.sendEmptyMessage(MSG_PAUSE_OP);
  }
  
  @Override
  void onDestroy() {
    //  Stop our bg thread
    mHT.quitSafely();
  }

  //  Handler.Callback implementation
  @Override
  boolean handleMessage(Message msg) {
    switch (msg.what) {
      case MSG_START_OP:
        mMsgHandler.sendEmptyMessageDelayed(MSG_SEND_ALIVE_OP, ALIVE_INTERVAL);
        break;
      
      case MSG_STOP_OP:
        mMsgHandler.removeMessages(MSG_SEND_ALIVE_OP);
        mMsgHandler.removeMessages(MSG_START_OP);
        break;
      
      case MSG_SEND_ALIVE_OP:
        //  Do POST request
        break;
    }
  }
}