如何从服务到活动完成数据传输？

Question

我有多个应用程序和单个服务，我想创建应用程序和服务之间的通信。我正在保存应用程序发送的服务中的值。现在我试图从服务中读取另一个应用程序的相同值。

这是如何实现的？我不想从服务中调用显式意图，也不想隐式意图，因为隐式意图会提供选择选项来选择所需的应用程序，这是我不想要的。请指教。

Answer 1

您可以使用Broadcast Receivers来完成这项工作。你不需要后台服务来做到这一点。您可以触发一个意图，并且其他注册指定意图过滤器的应用程序也可以使用该意图。

Answer 2

使用广播接收器，

public class AlarmReceiver extends BroadcastReceiver { 

    @Override 
    public void onReceive(Context context, Intent intent) { 
     try { 
      //    Bundle bundle = intent.getExtras(); 
      //   String message = bundle.getString("alarm_message"); 
      //     Toast.makeText(context,bundle.getString("eventName"), Toast.LENGTH_SHORT).show(); 

      NotificationManager notificationManager =(NotificationManager) context.getSystemService(context.NOTIFICATION_SERVICE); 
      int icon = R.drawable.event; 
      CharSequence notiText = "Event Notification"; 
      long time = System.currentTimeMillis(); 
      @SuppressWarnings("deprecation") 
      Notification notification = new Notification(icon, notiText,time); 
      notification.defaults |= Notification.DEFAULT_SOUND; 
      notification.flags |= Notification.FLAG_AUTO_CANCEL; 
      Intent notificationIntent = new Intent(context, Setting.class); 
        //put data in notificationIntent ....>>>>> 



      PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0); 
      notification.setLatestEventInfo(context,intent.getStringExtra("eventName"),intent.getStringExtra("eventDescription"), contentIntent); 
      int SERVER_DATA_RECEIVED = 1; 
      Calendar cal=Calendar.getInstance(); 
      Toast.makeText(context,"aavechhe "+intent.getBooleanExtra("Flag",false),Toast.LENGTH_SHORT).show(); 
      if(intent.getIntExtra("month",0)==cal.get(Calendar.DAY_OF_MONTH)) 
      { 
       Toast.makeText(context,"aavechhe "+cal.get(Calendar.DAY_OF_MONTH),Toast.LENGTH_SHORT).show(); 
       notificationManager.notify(SERVER_DATA_RECEIVED, notification); 
      } 
      if(intent.getBooleanExtra("Flag",false)) 
       notificationManager.notify(SERVER_DATA_RECEIVED, notification); 

     } catch (Exception e) { 
      Toast.makeText(context, "There was an error somewhere, but we still received an alarm", Toast.LENGTH_SHORT).show(); 
      e.printStackTrace(); 

     } 
    } 
}