java - 无法在 Android 中使用 AlarmManager 停止服务

Question

我有一个警报管理器启动服务的代码。我必须使用第二个闹钟在指定时间取消它。我看过的解决方案没有一个有效。我的代码如下:

 void startAtInterval(int fromTime, int fromTimeMinute, int toTime, int toTimeMinute, int id1, int id2) {
    // start alarm

    AlarmManager alarmMgr = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
    PendingIntent alarmIntent = PendingIntent.getService(getApplicationContext(), 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

    Calendar calendar = Calendar.getInstance();
    calendar.setTimeInMillis(System.currentTimeMillis());
    calendar.set(Calendar.HOUR_OF_DAY, fromTime);
    calendar.set(Calendar.MINUTE, fromTimeMinute);

    alarmMgr.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
            AlarmManager.INTERVAL_DAY, alarmIntent);

    // stop alarm

  AlarmManager alarmMgr1 = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
    PendingIntent alarmIntent1 = PendingIntent.getService(getApplicationContext(), 1, intent, PendingIntent.FLAG_CANCEL_CURRENT);

    Calendar calendar1 = Calendar.getInstance();
    calendar1.setTimeInMillis(System.currentTimeMillis());
    calendar1.set(Calendar.HOUR_OF_DAY, toTime);
    calendar1.set(Calendar.MINUTE, toTimeMinute);

    alarmMgr1.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar1.getTimeInMillis(),
            AlarmManager.INTERVAL_DAY, alarmIntent1);
    stopService(intent);

        alarmMgr1.cancel(alarmIntent1);

}

我使用了FLAG_UPDATE_CURRENT和FLAG_CANCEL_CURRENT。我还尝试停止服务，如我在代码中所示。我正在配置屏幕上打发时间。我知道它有效，因为第一个警报总是被触发。

Answer 1

您应该让第二个警报取消服务，并触发 BroadcastReceiver，然后停止服务。这将确保警报在任何情况下(例如应用程序被关闭)都能成功停止服务。

AlarmManager alarmMgr1 = (AlarmManager) getApplicationContext().getSystemService(Context.ALARM_SERVICE);
Intent intentCancelService= new Intent(getApplicationContext(), StopServiceReceiver.class);
PendingIntent alarmIntent1 = PendingIntent.getBroadcast(getApplicationContext(), StopServiceReceiver.REQUEST_CODE, intentCancelService, PendingIntent.GoTestAlarmReceiver);

Calendar calendar1 = Calendar.getInstance();
calendar1.setTimeInMillis(System.currentTimeMillis());
calendar1.set(Calendar.HOUR_OF_DAY, toTime);
calendar1.set(Calendar.MINUTE, toTimeMinute);

alarmMgr1.setInexactRepeating(AlarmManager.RTC_WAKEUP, calendar1.getTimeInMillis(),
        AlarmManager.INTERVAL_DAY, alarmIntent1);

然后制作您的BroadcastReceiver:

public class GoTestAlarmReceiver extends BroadcastReceiver {
    public static final int REQUEST_CODE = 123123;  //whatever code just unique

@Override
public void onReceive(Context context, Intent intent) {
    Intent i = new Intent(context, YourServiceClassHere.class);
    context.stopService(i);
    }
}

确保在 list 中声明接收者:

<receiver
        android:name=".StopServiceReceiver"
        android:enabled="true"
        android:process=":remote" />