收到通知 [FCM] 时如何自动启动 Android 应用程序？

Question

我想在用户收到应用通知时自动启动应用，启动器图标上不会有点击操作。

Answer 1

在您的onMessageReceived() 方法中，您可以尝试添加您的startActivity(intent) 代码。这样，当应用程序收到 FCM 消息时，它会启动应用程序。像这样……

@Override
public void onMessageReceived(RemoteMessage remoteMessage) {
    // Check if message contains a notification payload.
    if (remoteMessage.getNotification() != null) {
        startActivity(new Intent(this, MainActivity.class));
    }
}

Answer 2

如果通知正文不包含“通知”参数，当应用程序在后台运行时，方法 onMessageReceived() 可以正常工作。所有数据都应粘贴在“数据”中。像这样：

{
    "to":"token",
    "priority":"high",
    "data": {
        "title": "Carmen",
        "text": "Популярные новости за сегодня!",
        etc..
    }
}

然后您可以在代码中解析它并在通知中显示标题和文本。

例如：

override fun onMessageReceived(remoteMessage: RemoteMessage?) {
        Log.d("FirebaseService", "Receive notification: ${remoteMessage?.data}")
        remoteMessage?.let { showNotification(remoteMessage) }
    }

    private fun showNotification(remoteMessage: RemoteMessage) {
        val notificationModel: NotificationModel
                = getNotificationModelFromMessageData(remoteMessage.data)

        val intent = Intent(this, SplashActivity::class.java)
        intent.putExtra(NOTIFICATION_ARGUMENT, notificationModel)
        intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP)

        val pendingIntent = PendingIntent.getActivity(
                this, NOTIFICATION_RECEIVE_REQUEST_CODE,
                intent, PendingIntent.FLAG_ONE_SHOT)

        val defaultNotificationSound: Uri = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION)
        val notification: Notification
                = NotificationCompat.Builder(this)
                .setAutoCancel(true)
                .setContentIntent(pendingIntent)
                .setContentTitle(notificationModel.title)
                .setContentText(notificationModel.text)
                .setSmallIcon(R.mipmap.ic_launcher)
                .setSound(defaultNotificationSound)
                .build()

        val notificationManager: NotificationManager
                = getSystemService(Context.NOTIFICATION_SERVICE) as NotificationManager
        notificationManager.notify(NOTIFICATION_ID, notification)
    }

    private fun getNotificationModelFromMessageData(jsonData: MutableMap<String, String>): NotificationModel {
        return NotificationModel(
                jsonData[TITLE_PARAMETER] as String,
                jsonData[TEXT_PARAMETER] as String,
                jsonData[DAYS_PARAMETER] as String,
                jsonData[MESSAGE_ID] as String)
    }

希望对您有所帮助！