使用FCM加载通知大图片

正如标题所示，我希望使用FCM发送有效内容并加载位图以在通知大图中使用它。我试过这种方法（代码如下）来获取图像，但它没有奏效。任何帮助深表感谢使用FCM加载通知大图片

谢谢

String imageUrl; 

/** 
* Called when message is received. 
* 
* @param remoteMessage Object representing the message received from Firebase Cloud Messaging. 
*/ 
// [START receive_message] 
@Override 
public void onMessageReceived(RemoteMessage remoteMessage) { 
    // TODO(developer): Handle FCM messages here. 
    // If the application is in the foreground handle both data and notification messages here. 
    // Also if you intend on generating your own notifications as a result of a received FCM 
    // message, here is where that should be initiated. See sendNotification method below. 

    Intent intent = new Intent(this, MainActivity.class); 
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); 
    PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 /* Request code */, intent, 
      PendingIntent.FLAG_ONE_SHOT); 

    if (remoteMessage.getData().size() > 0) { 
     imageUrl = remoteMessage.getData().toString(); 
    } 

    Uri defaultSoundUri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION); 
    Notification.Builder notificationBuilder = new Notification.Builder(this) 
      .setSmallIcon(R.drawable.ic_launcher) 
      .setContentTitle("Glaze") 
      .setContentText(remoteMessage.getNotification().getBody()) 
      .setAutoCancel(true) 
      .setSound(defaultSoundUri) 
      .setLargeIcon(getBitmap(imageUrl)) 
      .setStyle(new Notification.BigPictureStyle().bigPicture(getBitmap(imageUrl))) 
      .setContentIntent(pendingIntent); 

    NotificationManager notificationManager = 
      (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); 

    notificationManager.notify(0 /* ID of notification */, notificationBuilder.build()); 

    Log.d(TAG, "From: " + remoteMessage.getFrom()); 
    Log.d(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody()); 
} 
// [END receive_message] 

public static Bitmap getBitmap(String src) { 
    try { 
     URL url = new URL(src); 
     HttpURLConnection connection = (HttpURLConnection) url.openConnection(); 
     connection.setDoInput(true); 
     connection.connect(); 
     InputStream input = connection.getInputStream(); 
     Bitmap myBitmap = BitmapFactory.decodeStream(input); 
     return myBitmap; 
    } catch (IOException e) { 
     e.printStackTrace(); 
     return null; 
    } 
}

来源

2016-08-14 Sasi Kanth

如果要在通知中显示图像，则必须使用RemoteViews。 – shivamDev

远程视图？如果可能，你可以进一步解释它吗 –

通过这个链接：https：//developer.android.com/reference/android/widget/RemoteViews.html你也可以搜索例子。 – shivamDev

您需要使用NotificationCompat.BigPictureStyle一个大画面的布局。另外，您必须在从网址加载位图后发布通知。

来源

2016-08-14 07:33:14 Bhav

我正在使用此Notification.BigPictureStyle（）而不是Notification Compat。我正在获取该样式，但图像未加载。我应该如何加载它之前，任何代码示例？ –

您可以使用AsyncTask从'doInBackground（）'中的url下载图像，并从'onPostExecute（）'发布通知。 [类似问题]（https://stackoverflow.com/questions/24840282/load-image-from-url-in-notification-android） – Bhav

使用FCM加载通知大图片

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