android - 使用 Firebase 云消息传递显示大 View 通知

Question

在Firebase Cloud Messaging documentation ，没有提到大 View /扩展布局的通知。

当应用程序处于后台时，我应该如何显示大 View 通知？根据此 faq，在 FirebaseMessagingService 的 onMessageReceived 中创建自定义通知似乎是不可能的:

When your app is in the background, notification messages are displayed in the system tray, and onMessageReceived is not called. For notification messages with a data payload, the notification message is displayed in the system tray, and the data that was included with the notification message can be retrieved from the intent launched when the user taps on the notification.

Answer 1

使用数据对象发送您想要查看的通知。您基本上可以将所需的所有内容放入数据对象中，并始终在 onMessageReceived 方法中接收它。这是一个例子。

public class AppFireBaseMessagingService extends FirebaseMessagingService {

    private final static int REQUEST_CODE = 1;

    @Override
    public void onMessageReceived(RemoteMessage remoteMessage) {
        Map<String, String> data = remoteMessage.getData();
        if (data == null) return;

        if (data.containsKey("title") && data.containsKey("message")) {
            showNotification(data.get("title"), data.get("message"));
        }
    }

    private void showNotification(String title, String body) {
        NotificationCompat.Builder builder = new NotificationCompat.Builder(this)
                .setContentTitle(title)
                .setSmallIcon(R.drawable.notification_icon);

        if (body != null && !body.isEmpty()) {
            builder.setStyle(new NotificationCompat.BigTextStyle().bigText(body));
            builder.setContentText(body);
        }

        Intent intent = new Intent(this, MainActivity.class);
        PendingIntent contentIntent = PendingIntent.getActivity(this, REQUEST_CODE, intent, PendingIntent.FLAG_UPDATE_CURRENT);

        builder.setContentIntent(contentIntent);
        builder.setAutoCancel(true);

        NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
        Notification n = builder.build();
        n.defaults = Notification.DEFAULT_ALL;
        notificationManager.notify(0, n);
    }

}