为什么 PendingIntent 打开应用的启动器活动而不是特定活动？

Question

我正在使用 firebase 发送通知。当用户单击通知时，它将打开 ResultActivity。当应用程序处于前台时，它工作正常。但是当应用程序在后台时，它会打开 HomeActivity（这是应用程序的启动器活动）而不是 ResultActivity。我不明白这是什么问题？

public class MyFirebaseMessagingService extends FirebaseMessagingService {

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this);
        notificationBuilder.setContentTitle(getResources().getString(R.string.app_name));
        notificationBuilder.setContentText(remoteMessage.getNotification().getBody());
        notificationBuilder.setAutoCancel(true);
        notificationBuilder.setSmallIcon(R.mipmap.ic_launcher);

        Intent intent = new Intent(getApplicationContext(), ResultActivity.class);

        PendingIntent pendingIntent = PendingIntent.getActivity(getApplicationContext(), 0, intent, PendingIntent.FLAG_ONE_SHOT);

        notificationBuilder.setContentIntent(pendingIntent);
        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        notificationManager.notify(0, notificationBuilder.build());
    }
}

Answer 1

这是测试 click_action 映射的好方法。它需要一个类似于 FCM 文档中指定的意图过滤器：

<intent-filter>
    <action android:name="OPEN_ACTIVITY_1" />
    <category android:name="android.intent.category.DEFAULT" />
</intent-filter>

另外，请记住，这仅在应用程序在后台时才有效。如果它在前台，您将需要实现 FirebaseMessagingService 的扩展。在 onMessageReceived 方法中，您需要手动导航到 click_action 目标

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
    //This will give you the topic string from curl request (/topics/news)
    Log.d(TAG, "From: " + remoteMessage.getFrom());
    //This will give you the Text property in the curl request(Sample     Message): 
    Log.d(TAG, "Notification Message Body: " + remoteMessage.getNotification().getBody());
    //This is where you get your click_action 
    Log.d(TAG, "Notification Click Action: " + remoteMessage.getNotification().getClickAction());
    //put code here to navigate based on click_action
    }