如何显示Heads up通知android

Question

如何获得抬头通知.以下代码我只能看到状态栏上的三个点和通知栏中的通知.

Intent intent = new Intent(this, MainActivity.class);

intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
PendingIntent pendingIntent = PendingIntent.getActivity(this, 0 , intent,PendingIntent.FLAG_ONE_SHOT);
Bitmap bm = BitmapFactory.decodeResource(getResources(), R.drawable.bip);
Uri defaultSoundUri=RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this)
                .setSmallIcon(R.drawable.bip)
                .setContentTitle("Temp")
                .setPriority(NotificationCompat.PRIORITY_HIGH)
                .setContentText(message)
                .setAutoCancel(true)
                .setSound(defaultSoundUri)
                .setContentIntent(pendingIntent);

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

notificationManager.notify(0, notificationBuilder.build());

Answer 1

这段代码适合我:

NotificationCompat.Builder mBuilder =
                    new NotificationCompat.Builder(context)
                            .setSmallIcon(R.drawable.ic_media_play)
                            .setContentTitle("My notification")
                            .setContentText("Hello World!")
                            .setDefaults(Notification.DEFAULT_ALL)
                            .setPriority(Notification.PRIORITY_HIGH);

Answer 2

我遇到了同样的问题,但是我正在使用NotificationCompat.Builder()需要来自a的频道ID 的新呼叫NotificationChannel.

如果NotificationChannel使用重要性值创建通知,则通知仅显示为抬头通知NotificationManager.IMPORTANCE_HIGH:

NotificationChannel channel = new NotificationChannel("channel01", "name", 
     NotificationManager.IMPORTANCE_HIGH);   // for heads-up notifications
channel.setDescription("description");

// Register channel with system
NotificationManager notificationManager = getSystemService(NotificationManager.class);
notificationManager.createNotificationChannel(channel);

显示单挑通知:

Notification notification = new NotificationCompat.Builder(this, "channel01")
        .setSmallIcon(android.R.drawable.ic_dialog_info)
        .setContentTitle("Test")
        .setContentText("You see me!")
        .setDefaults(Notification.DEFAULT_ALL)
        .setPriority(NotificationCompat.PRIORITY_HIGH)   // heads-up
        .build();

NotificationManagerCompat notificationManager = NotificationManagerCompat.from(this);
notificationManager.notify(0, notification);