如何运行后台服务在Android中发出警报？

Question

我正在开发一个Android应用程序，但问题是我必须通过通知栏上的消息提醒用户，这将在十（10）天后发生，就像在糖果粉碎游戏中它会在几小时后提供完整生命警报。我是android的初学者，所以我对这个场景的实现感到困惑。请用代码指导我的实现。

Answer 1

您可以使用AlarmManager和BroadcastReceiver

执行此操作

AlarmManager

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

AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);

Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.DAY_OF_MONTH, 10);
alarmManager.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), pendingIntent);

广播接收器

public class TimeAlarm extends BroadcastReceiver {

  @Override
  public void onReceive(Context context, Intent paramIntent) {

     // Request the notification manager
     NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

     // Create a new intent which will be fired if you click on the notification
     Intent intent = new Intent("android.intent.action.VIEW");

     // Attach the intent to a pending intent
     PendingIntent pendingIntent = PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

     // Create the notification
     Notification notification = new Notification(R.drawable.icon, "Something new!"), System.currentTimeMillis());
     notification.setLatestEventInfo(context, "Something new!", "Description",pendingIntent);

     // Fire the notification
     notificationManager.notify(1, notification);
 }

}