android - 如何在我的程序中包含计时器？

Question

我需要在我的应用程序中包含计时器。我刚刚浏览了站点中给出的示例。并尝试在我的程序中实现它。但问题是我不知道如何使用计时器。在我的程序中我想要在按钮上启动计时器 click.timer 必须显示在屏幕上。但是屏幕是一个 Canvas (当我们点击按钮时它加载 Canvas )带有移动的物体。当两个物体碰撞时计时器必须停止并且必须显示消息框中的值。下面给出的是我的主要 Activity 代码。

public class MyActivity extends Activity {

private static final String TAG = MyActivity.class.getSimpleName();
public static Timer myTimer;
private Button startbtn;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    setContentView(R.layout.main);
    this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT); 
    startbtn=(Button)findViewById(R.id.startbtn);
    startbtn.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub

               // making it full screen
                getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
                // set our MainGamePanel as the View
                setContentView(new MainGamePanel(getApplicationContext()));
                Log.d(TAG, "View added");

        }
    });

   myTimer = new Timer();
    myTimer.schedule(new TimerTask() {
        @Override
        public void run() {
            TimerMethod();
        }

    }, 0, 1000);

}

@Override
protected void onDestroy() {
    Log.d(TAG, "Destroying...");
    super.onDestroy();
}

@Override
protected void onStop() {
    Log.d(TAG, "Stopping...");
    super.onStop();
}
private void TimerMethod()
{
    //This method is called directly by the timer
    //and runs in the same thread as the timer.

    //We call the method that will work with the UI
    //through the runOnUiThread method.
    this.runOnUiThread(Timer_Tick);
}

private Runnable Timer_Tick = new Runnable() {
    public void run() {

    //This method runs in the same thread as the UI.               

    //Do something to the UI thread here

    }
};

      }

我知道如何检查碰撞。我只需要计时器部分，例如启动计时器，在屏幕上显示并从另一个类(class)停止它。有人能帮我吗……请……

Answer 1

使用此代码将在一秒后重复，计时器将运行 30 秒

new CountdownTimer(30000, 1000) {

 public void onTick(long millisUntilFinished) {
     mTextField.setText("seconds remaining: " + millisUntilFinished / 1000);
 }

 public void onFinish() {
   finish();
   }
}.start();