安卓通知声音

我使用了较新的 NotificationCompat 构建器，但无法收到通知以发出声音.它会振动并闪烁灯光.android 文档说要设置我已经完成的样式:

I've used the newer NotificationCompat builder and I can't get the notification to make a sound. It will vibrate and flash the light. The android documentation says to set a style which I've done with:

builder.setStyle(new NotificationCompat.InboxStyle());

但是没有声音?

完整代码:

NotificationCompat.Builder builder =  
        new NotificationCompat.Builder(this)  
        .setSmallIcon(R.drawable.ic_launcher)  
        .setContentTitle("Notifications Example")  
        .setContentText("This is a test notification");  


Intent notificationIntent = new Intent(this, MenuScreen.class);  

PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent,   
        PendingIntent.FLAG_UPDATE_CURRENT);  

builder.setContentIntent(contentIntent);  
builder.setAutoCancel(true);
builder.setLights(Color.BLUE, 500, 500);
long[] pattern = {500,500,500,500,500,500,500,500,500};
builder.setVibrate(pattern);
builder.setStyle(new NotificationCompat.InboxStyle());
// Add as notification  
NotificationManager manager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);  
manager.notify(1, builder.build());