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android - 当应用程序处于前台时无法接收 FCM 通知

转载 作者:行者123 更新时间:2023-12-05 00:06:00 25 4
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我正在处理 FCM 通知。当应用程序处于后台时,我的通知工作正常,但当应用程序处于前台时无法接收通知。我几乎尝试了所有方法,但没有用。应用程序在前台时不会收到通知。

list .xml:

       <service
android:name=".Notification.MyFirebaseMessagingService"
android:exported="false">
<intent-filter>

<action android:name="com.google.firebase.MESSAGING_EVENT" />
</intent-filter>
</service>

<service android:name=".Notification.MyFirebaseInstanceIDService">
<intent-filter>
<action android:name="com.google.firebase.INSTANCE_ID_EVENT" />
</intent-filter>
</service>

代码(FirebaseMessagingService):

           @Override
public void onMessageReceived(RemoteMessage remoteMessage) {
Log.e(TAG, "From: " + remoteMessage.getFrom());

if (remoteMessage == null)
return;

// Check if message contains a notification payload.
if (remoteMessage.getNotification() != null) {
Log.e(TAG, "Notification Body: " + remoteMessage.getNotification().getBody());
handleNotification(remoteMessage.getNotification().getBody());
}

try {

JSONObject json = new JSONObject(remoteMessage.getData().toString());
handleDataMessage(json);
} catch (Exception e) {
Log.e(TAG, "Exception: " + e.getMessage());
}


Log.e(TAG, "Data Payload: " + remoteMessage.getData().toString());

}

private void handleNotification(String message) {
if (!NotificationUtils.isAppIsInBackground(getApplicationContext())) {
// app is in foreground, broadcast the push message
Intent pushNotification = new Intent(Config.PUSH_NOTIFICATION);
pushNotification.putExtra("message", message);
LocalBroadcastManager.getInstance(this).sendBroadcast(pushNotification);

// play notification sound
NotificationUtils notificationUtils = new NotificationUtils(getApplicationContext());
notificationUtils.playNotificationSound();
} else {
// If the app is in background, firebase itself handles the notification
}
}

private void handleDataMessage(JSONObject json) {
Log.e(TAG, "push json: " + json.toString());

try {
JSONObject data = json.getJSONObject("data");
String title = data.getString("title");
String message = data.getString("body");
boolean isBackground = data.getBoolean("is_background");
String imageUrl = data.getString("image");
String timestamp = data.getString("timestamp");
JSONObject payload = data.getJSONObject("payload");

Log.e(TAG, "title: " + title);
Log.e(TAG, "message: " + message);
Log.e(TAG, "isBackground: " + isBackground);
Log.e(TAG, "payload: " + payload.toString());
Log.e(TAG, "imageUrl: " + imageUrl);
Log.e(TAG, "timestamp: " + timestamp);


if (!NotificationUtils.isAppIsInBackground(getApplicationContext())) {
// app is in foreground, broadcast the push message
Intent pushNotification = new Intent(Config.PUSH_NOTIFICATION);
pushNotification.putExtra("message", message);
LocalBroadcastManager.getInstance(this).sendBroadcast(pushNotification);

// play notification sound
NotificationUtils notificationUtils = new NotificationUtils(getApplicationContext());
notificationUtils.showNotificationMessage("iGrab", message, timestamp, pushNotification);
notificationUtils.playNotificationSound();


} else {
// app is in background, show the notification in notification tray
Intent resultIntent = new Intent(getApplicationContext(), Splash.class);
resultIntent.putExtra("message", message);

// check for image attachment
if (TextUtils.isEmpty(imageUrl)) {

showNotificationMessage(getApplicationContext(), title, message, timestamp, resultIntent);
} else {
// image is present, show notification with image
showNotificationMessageWithBigImage(getApplicationContext(), title, message, timestamp, resultIntent, imageUrl);
}
}
} catch (JSONException e) {
Log.e(TAG, "Json Exception: " + e.getMessage());
} catch (Exception e) {
Log.e(TAG, "Exception: " + e.getMessage());
}
}

最佳答案

FCM 支持两种类型的消息:

  • 通知消息
  • 数据信息

如果服务器发送通知消息,它会自动在系统托盘上显示通知。

Use notification messages when you want FCM to handle displaying a notification on your client app's behalf. Use data messages when you want to process the messages on your client app.

FCM can send a notification message including an optional data payload. In such cases, FCM handles displaying the notification payload, and the client app handles the data payload.

关键在于你的情况:

Notification messages are delivered to the notification tray when the app is in the background. For apps in the foreground, messages are handled by a callback function.

https://firebase.google.com/docs/cloud-messaging/concept-options

关于android - 当应用程序处于前台时无法接收 FCM 通知,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56217297/

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