Question

我有这种方法。问题是当我锁定手机时它不起作用。它只显示通知，如果手机屏幕打开，如果我阻止它，我只在5分钟后激活它（晚上9点，我在晚上9点05分把它打开），没有任何反应。我读过this个问题，但我不知道如何在特定时间启动它。提前致谢，请不要将此问题视为this问题

的副本

public void startBroucast(int a,int b) {
      int minutes=a;
      int hours=b;
       Calendar c = Calendar.getInstance();
       c.add(Calendar.HOUR,hours);
       c.add(Calendar.MINUTE,minutes);
       Timer time = new Timer();
       time.schedule(new TimerTask() {
           @Override
           public void run() {
              showNotification();
           }
       },c.getTime());
   }

Answer 1

您应该使用AlarmManager来安排将来的任务。以下是您可以这样做的方法：

public void startBroucast(int minutes,int hours) {

   Calendar c = Calendar.getInstance();
   c.set(Calendar.HOUR_OF_DAY,hours);
   c.set(Calendar.MINUTE,minutes);

long timeInMillis = c.getTimeInMillis();

 Intent notificationIntent = new Intent(getContext(),NotificationReceiver.class);

    mNotificationId = 123; //the id of the notification - you can use it to 
    //change the notification later

    PendingIntent pendingNotificationIntent = PendingIntent.getBroadcast(getContext(),mNotificationId,notificationIntent,PendingIntent.FLAG_UPDATE_CURRENT);


    AlarmManager alarmManager = (AlarmManager) getActivity().getSystemService(Context.ALARM_SERVICE);



alarmManager.set(AlarmManager.RTC_WAKEUP,timeInMillis,pendingNotificationIntent);
}

现在，您需要创建NotificationReceiver类。

public class NotificationReceiver extends BroadcastReceiver {


    @Override
    public void onReceive(Context context, Intent intent) {
       createNotification(); //this is where you create and schedule your notification
    }
}

您还需要在AndroidManifext.xml中注册BroadcastReceiver

<receiver
        android:name=".util.NotificationReceiver"
        android:enabled="true"
        android:exported="false" />

如何在手机锁定的特定时间进行操作？

1 个答案: