public class MainActivity extends AppCompatActivity {
      private TextView tv;     private Button task;     private Timer timer;     private TimerTask timetask;     @Override     protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);         setContentView(R.layout.activity_main);         tv = (TextView) findViewById(R.id.tv);         task = (Button) findViewById(R.id.task);         task.setOnClickListener(new View.OnClickListener() {
              @Override             public void onClick(View view) {
  //                ThreadTask();                 handler.postDelayed(myrunable,10000); //                TimeTask();             }         });     }     //用线程Thread休眠的方式实行延时     private void ThreadTask(){
          for (int i = 0; i < 10; i++) {
              try {
                  Thread.sleep(1000);             } catch (InterruptedException e) {
                  e.printStackTrace();             }             Log.e("tag", "onClick: "+i );         }         tv.setText("wo shi yi ge hao ren .....");//要十秒之后显示这个     }     //用Handler实现定时延时     Handler handler = new Handler();     Runnable myrunable = new Runnable() {
          @Override         public void run() {
              tv.setText("wo shi yi ge hao ren .....");//要十秒之后显示这个         }     };     //使用Timer.schedule方式延时，可能会不准确     private void TimeTask(){
          timer = new Timer();         //要十秒之后显示这个         timetask = new TimerTask() {
              @Override             public void run() {
                  runOnUiThread(new Runnable() {
                      @Override                     public void run() {
                          tv.setText("wo shi yi ge hao ren .....");//要十秒之后显示这个                     }                 });             }         };         timer.schedule(timetask,10000);     } } demo下载：https://github.com/renjiemei1225/TimedTask.git