Handler多线程二（推荐）

例子：

public class HandlerTest extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        System.out.println("activity-->"+Thread.currentThread().getId());
        HandlerThread h = new HandlerThread("handler_thread");
        h.start();
        MyHandler myHandler = new MyHandler(h.getLooper());
        Message m = myHandler.obtainMessage();
		//参数传递
        m.arg1 = 123;
        m.obj = "abc";
		//通过Bundle传递参数
        Bundle b = new Bundle();
        b.putInt("age", 20);
        b.putString("name", "guanrl");
        m.setData(b);
        //将Msg发送到目标对象，所谓的目标对象，就是生成该msg对象的handler对象
        m.sendToTarget();
    }
    class MyHandler extends Handler{
      	public MyHandler(Looper looper){
    		    super(looper);
     	}

		@Override
		public void handleMessage(Message msg) {
			System.out.println(Thread.currentThread().getId());
			System.out.println("handlerMessage");
		}
    	
      }
}

PS：该例子使用HandlerThread可以使得onCreate方法和handlerMessage方法处于不同的线程中（推荐使用！！）