如何暂停和恢复Android闹钟？

我正在开发一个闹钟，它会在指定的时间间隔内振动。所以如果我选择5秒钟，应用程序会每隔5秒钟振动一次。但我需要停下来，暂停并恢复应用程序。如何暂停和恢复Android闹钟？

这是我的课：

public class AndroidAlarmService extends Activity { 

private PendingIntent pendingIntent; 
private Chronometer chronometer; 
private Intent myIntent; 
AlarmManager alarmManager; 
Calendar calendar; 
private long mTimeWhenStopped; 

@Override 
public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    Button buttonStart = (Button) findViewById(R.id.startalarm); 
    Button buttonStop = (Button) findViewById(R.id.stopalarm); 
    Button buttonPause = (Button) findViewById(R.id.pausealarm); 
    Button buttonResume = (Button) findViewById(R.id.resumealarm); 

    chronometer = ((Chronometer) findViewById(R.id.clock_time)); 

    myIntent = new Intent(AndroidAlarmService.this, 
      MyAlarmService.class); 
    pendingIntent = PendingIntent.getService(
      AndroidAlarmService.this, 0, myIntent, 0); 

    alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE); 
    calendar = Calendar.getInstance();

我开始它这个方法：

buttonStart.setOnClickListener(new Button.OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 

      int initialValue = 0; 

      chronometer.setBase(SystemClock.elapsedRealtime() + initialValue); 
      chronometer.start(); 

      calendar.setTimeInMillis(System.currentTimeMillis()); 

      alarmManager.setRepeating(AlarmManager.RTC_WAKEUP, 
        calendar.getTimeInMillis(), 5 * 1000, pendingIntent); 

      Toast.makeText(AndroidAlarmService.this, "Start Alarm", 
        Toast.LENGTH_LONG).show(); 
     } 
    });

这是用来暂停：

buttonPause.setOnClickListener(new Button.OnClickListener() { 

     @Override 
     public void onClick(View arg0) { 
      stopRunning(); 

      mTimeWhenStopped = chronometer.getBase() - SystemClock.elapsedRealtime(); 

      // Tell the user about what we did. 
      Toast.makeText(AndroidAlarmService.this, "Resume!", 
        Toast.LENGTH_LONG).show(); 

     } 
    });

我想恢复应用程序从它开始的点。我该怎么做？

谢谢，你！

来源

2012-12-18 androidevil