【问题标题】:Download file on Push Notification Android在推送通知 Android 上下载文件
【发布时间】:2015-03-10 08:07:59
【问题描述】:

点击推送notification 后,我正在尝试打开Activity 并通过HttpPost 下载文件。我是Android Programming 的新手。我不确定我应该把通过HttpPost 下载文件的代码放在哪里?

我的广播接收器:

public class MyGcmBroadcastReceiver extends WakefulBroadcastReceiver {
public void onReceive(Context context, Intent intent) { 
    ComponentName comp = new ComponentName(context.getPackageName(), GcmIntentService.class.getName());
    startWakefulService(context, (intent.setComponent(comp)));
}
}

我的意图服务类:

    public class GcmIntentService extends IntentService{
    public static final String TAG="TEST";
    public static final int NOTIFICATION_ID = 1;
    private NotificationManager mNotificationManager;
    NotificationCompat.Builder builder;
    Bundle extras;
     public GcmIntentService()
        {
            super("GcmIntentService");
        }

     @Override
        protected void onHandleIntent(Intent intent) {
         extras = intent.getExtras();
         GoogleCloudMessaging gcm = GoogleCloudMessaging.getInstance(this);
         String messageType = gcm.getMessageType(intent);


         if (!extras.isEmpty()) { 

             if (GoogleCloudMessaging.MESSAGE_TYPE_SEND_ERROR.equals(messageType)) {
                 sendNotification("Send error: " + extras.toString());
             } else if (GoogleCloudMessaging.
                        MESSAGE_TYPE_DELETED.equals(messageType)) {
                    sendNotification("Deleted messages on server: " +
                            extras.toString());
                // If it's a regular GCM message, do some work.
                } else if (GoogleCloudMessaging.
                        MESSAGE_TYPE_MESSAGE.equals(messageType)) {
                    // This loop represents the service doing some work.
                    for (int i=0; i<5; i++) {
                        Log.i(TAG, "Working... " + (i+1)
                                + "/5 @ " + SystemClock.elapsedRealtime());
                        try {
                            Thread.sleep(5000);
                        } catch (InterruptedException e) {
                        }
                    }
                    Log.i(TAG, "Completed work @ " + SystemClock.elapsedRealtime());
                    // Post notification of received message.
                    sendNotification(extras.toString());
                    Log.i(TAG, "Received: " + extras.toString());
                }


         }
         MyGcmBroadcastReceiver.completeWakefulIntent(intent);
     }

         private void sendNotification(String msg) {
                mNotificationManager = (NotificationManager)this.getSystemService(Context.NOTIFICATION_SERVICE);

                PendingIntent contentIntent = PendingIntent.getActivity(this, 0,new Intent(this, MainPage.class), 0);

                NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(this)
                .setContentTitle("New Message")
                .setSmallIcon(R.drawable.ic_launcher)
                .setDefaults(Notification.DEFAULT_SOUND)
                .setStyle(new NotificationCompat.BigTextStyle().bigText(extras.getString("Message:").substring(extras.getString("Message:").indexOf(":")+2, extras.getString("Message:").length())))
                .setContentText(extras.toString().substring((extras.toString().indexOf("="))+1, extras.toString().indexOf("_")));

                mBuilder.setContentIntent(contentIntent);
                mNotificationManager.notify(NOTIFICATION_ID, mBuilder.build());
            }


}

【问题讨论】:

  • 我可以看到你已经在点击通知时开始了一个新的活动,现在你想要什么,????
  • 您希望代码下载文件,您将放入 MainPage.class ???
  • 嗨拉胡尔,感谢您的回复。单击通知时,我已经编写了代码以转到另一个名为“MainPage”的活动。但我想要的是在哪里放置代码以通过 HttpPost 下载图像并显示它何时到达“MainPage”活动?
  • 我自己想出来的

标签: android android-intent push-notification


【解决方案1】:

如果您不需要显示推送通知,只需下载推送通知上的图像即可。

相同的库很少。您可以使用事件总线并获取在您的活动中收到的推送通知事件。比在您可以在主活动中下载图像之后。 https://github.com/greenrobot/EventBus

同样的方式你也可以显示 Notification 并将事件发送到 MainActivity 以下载 Image 并显示它。

【讨论】:

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