自己闲暇之余随便写的demo(更新textView),布局里面只有一个按钮和TextView：
public class LooperHandlerActivity extends Activity { //更新UI private Handler mHandler; private Button mBtn; private TextView tv_UI; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_looper_handler); tv_UI = (TextView) findViewById(R.id.tv_UI); mBtn = (Button) findViewById(R.id.mBtn); initThreadLooper(); } private void initThreadLooper() { mHandler = new Handler(){ @Override public void handleMessage(Message msg) { tv_UI.setText(msg.what+""); if(msg.what == 9){ mBtn.setClickable(true); } } }; mBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { LooperThread thread = new LooperThread(); thread.setHandler(mHandler); thread.start(); mBtn.setClickable(false); } }); } /** * 创建一个子线程 */ class LooperThread extends Thread{ Handler handler; public void setHandler(Handler handler){ this.handler = handler; } @Override public void run() { Looper.prepare(); for (int i = 0; i < 10; i++) { try { sleep(1000); handler.sendEmptyMessageDelayed(i,0); } catch (InterruptedException e) { e.printStackTrace(); } } Looper.loop(); } } }