Android 广播接收器下载数据并发送通知

我有一个接收器，它捕捉报警/系统广播，然后它必须从服务器获取当前数据，然后发送通知。我怎样才能做到这一点？请帮忙。谢谢。

对于您的问题，您可以执行AsyncTask，该任务将以OnReceive方法从服务器获取数据，当您在检索数据时获得成功时，您可以在那里设置通知生成器

下面的代码可用于显示通知

NotificationCompat.Builder mBuilder =   new NotificationCompat.Builder(this)
            .setSmallIcon(R.drawable.ic_launcher) // notification icon
            .setContentTitle("Notification!") // title for notification
            .setContentText("Hello word") // message for notification
            .setAutoCancel(true); // clear notification after click
Intent intent = new Intent(this, MainActivity.class);
PendingIntent pi = PendingIntent.getActivity(this,0,intent,Intent.FLAG_ACTIVITY_NEW_TASK);
mBuilder.setContentIntent(pi);
NotificationManager mNotificationManager =
                    (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
mNotificationManager.notify(0, mBuilder.build());

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从广播接收器启动意图服务。使用HTTP请求从服务器下载数据。然后解析响应并相应地放置通知

 public class MyBroadcastReceiver extends BroadcastReceiver {
       @Override
       public void onReceive(Context context, Intent intent) {
       ConnectivityManager connMgr = (ConnectivityManager) context.getSystemService(context.CONNECTIVITY_SERVICE);
       final NetworkInfo wifi = connMgr.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
       final NetworkInfo mobile = connMgr.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
       if (wifi.isConnected() || mobile.isConnected()) {
          Intent intent=new Intent(context,DownloadService.class);
          context.startService(intent);
       }
       else {
          Toast.makeText(context, "No Network Connectivity", Toast.LENGTH_SHORT).show();
       }
    }
 }

下载服务类别：

 public class DownloadService extends IntentService{
      String response = "";
      private NotificationManager mNotificationManager;
      public DownloadService() {
          super("DownloadService");
      }

      @Override
      protected void onHandleIntent(Intent intent) {
            // Get the data
            // Parse the data
            // Put the notificaton using NotificationManager
      }
 }

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IntentService将立即开始运行，还是必须等待系统在以后安排运行？当您收到广播意图时，将立即调用IntentService