一段時間後鬧鐘管理器不工作

Question

這是我的代碼。它工作正常，但一段時間後（約1小時）它不起作用。怎麼了？提前致謝。

<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission> 

public class Alarm extends BroadcastReceiver 
{  
    @Override 
    public void onReceive(Context context, Intent intent) 
    { 
     Toast.makeText(context, "Alarm !!!!!!!!!!!!!", Toast.LENGTH_LONG).show(); 
    } 

    public void SetAlarm(Context context) 
    { 
     AlarmManager am=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE); 
     Intent i = new Intent(context, Alarm.class); 
     PendingIntent pi = PendingIntent.getBroadcast(context, 0, i, 0); 
     am.setRepeating(AlarmManager.RTC_WAKEUP, SystemClock.elapsedRealtime(), 1000 * 60 * 10, pi); 
    } 

    public void StopAlarm(Context context) 
    { 
     Intent intent = new Intent(context, Alarm.class); 
     PendingIntent sender = PendingIntent.getBroadcast(context, 0, intent, 0); 
     AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); 
     alarmManager.cancel(sender); 
    } 
} 

Answer 1

這是工作代碼。它每10分鐘喚醒一次CPU並顯示通知。

加入的Manifest.xml：

... 
<uses-permission android:name="android.permission.WAKE_LOCK"></uses-permission> 
... 
<receiver android:process=":remote" android:name="Alarm"></receiver> 
... 

代碼：

public class Alarm extends BroadcastReceiver 
{  
    @Override 
    public void onReceive(Context context, Intent intent) 
    { 
     PowerManager pm = (PowerManager) context.getSystemService(Context.POWER_SERVICE); 
     PowerManager.WakeLock wl = pm.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "YOUR TAG"); 
     wl.acquire(); 

     // Put here YOUR code. 
     Toast.makeText(context, "Alarm !!!!!!!!!!", Toast.LENGTH_LONG).show(); // For example 

     wl.release(); 
    } 

    public void SetAlarm(Context context) 
    { 
     AlarmManager am=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE); 
     Intent i = new Intent(context, Alarm.class); 
     PendingIntent pi = PendingIntent.getBroadcast(context, 0, i, 0); 
     am.setRepeating(AlarmManager.RTC_WAKEUP, System.currentTimeMillis(), 1000 * 60 * 10, pi); // Millisec * Second * Minute 
    } 

    public void CancelAlarm(Context context) 
    { 
     Intent intent = new Intent(context, Alarm.class); 
     PendingIntent sender = PendingIntent.getBroadcast(context, 0, intent, 0); 
     AlarmManager alarmManager = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE); 
     alarmManager.cancel(sender); 
    } 
} 

Answer 2

具體參考Blog範例Scheduling Task Using Alarm Manager in Android

public void scheduleAlarm(View V) 
{ 
    // time at which alarm will be scheduled here alarm is scheduled at 1 day from current time, 
    // we fetch the current time in milliseconds and added 1 day time 
    // i.e. 24*60*60*1000= 86,400,000 milliseconds in a day  
    Long time = new GregorianCalendar().getTimeInMillis()+24*60*60*1000; 

    // create an Intent and set the class which will execute when Alarm triggers, here we have 
    // given AlarmReciever in the Intent, the onRecieve() method of this class will execute when 

    Intent intentAlarm = new Intent(this, AlarmReciever.class); 

    //Get the Alarm Service 
    AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); 

    //set the alarm for particular time 
    alarmManager.set(AlarmManager.RTC_WAKEUP,time, PendingIntent.getBroadcast(this,1, intentAlarm, PendingIntent.FLAG_UPDATE_CURRENT)); 
    Toast.makeText(this, "Alarm Scheduled for Tommrrow", Toast.LENGTH_LONG).show(); 

}_ 

AlarmReciever類

public class AlarmReciever extends BroadcastReceiver 
{ 
    @Override 
    public void onReceive(Context context, Intent intent) 
    { 
     // TODO Auto-generated method stub         
     // Your Code  When Alarm willl trigger        
    }  
}