我想展现一个通知型抬头，但我不能。我试过

I'm trying to show a notification-type heads-up but I could not. What I tried

                final Notification.Builder notif = new Builder(getApplicationContext())
                .setContentTitle(getString(R.string.title))
                .setContentText(getString(R.string.text))
        //      .setTicker(getString(R.string.tick)) removed, seems to not show at all
        //      .setWhen(System.currentTimeMillis()) removed, match default
        //      .setContentIntent(contentIntent) removed, I don't neet it
                .setColor(Color.parseColor(getString(R.color.yellow))) //ok
                .setSmallIcon(R.drawable.ic_small) //ok
                .setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.ic_launcher))
        //      .setCategory(Notification.CATEGORY_CALL) does not seem to make a difference
                .setPriority(Notification.PRIORITY_MAX); //does not seem to make a difference
        //      .setVisibility(Notification.VISIBILITY_PRIVATE); //does not seem to make a difference
                mNotificationManager.notify(Constants.NOTIFICATION_ID, notif.build());

的通知显示只在酒吧的一个图标。 我使用的是API 21 api21仿真器（不要使用L preVIEW） 尝试机器人：Theme.Holo.NoActionBar和android：Theme.Holo.NoActionBar.Fullscreen 而NotificationCompat.Builder

The notification is shown only as an icon in the bar. I'm using api 21 on api21 emulator (not L preview) Tried android:Theme.Holo.NoActionBar and android:Theme.Holo.NoActionBar.Fullscreen And NotificationCompat.Builder

SDK的例子是不可用。没有人知道该怎么办呢？

Sdk examples are not available. does anyone know how to do it?

我做了它的工作增加

                    .setDefaults(Notification.DEFAULT_VIBRATE)

是最好的方式？

is the best way?

推荐答案

据Notifications,您需要设置振动或铃声进行单挑的工作。但是，这里有一个快速的黑客不需要VIBRATE权限产生抬头通知：

According to Notifications, you are required to set a vibrate or ringtone to make Heads-up work. However, here's a quick hack that doesn't require VIBRATE permission to produce a head-up notification:

notificationBuilder.setPriority(Notification.PRIORITY_HIGH)
                   .setVibrate(new long[0]);