我试图在通知中使用BigTextStyle显示多行文本,但无法这样做.我正在使用下面的代码.

public void sendNotification(View view) {
    String msgText = "Jeally Bean Notification example!! "
            + "where you will see three different kind of notification. "
            + "you can even put the very long string here.";

    NotificationManager notificationManager = getNotificationManager();
    PendingIntent pi = getPendingIntent();
    android.app.Notification.Builder builder = new Notification.Builder(
            this);
    builder.setContentTitle("Big text Notofication")
            .setContentText("Big text Notification")
            .setSmallIcon(R.drawable.ic_launcher).setAutoCancel(true)
            .setPriority(Notification.PRIORITY_HIGH)
            .addAction(R.drawable.ic_launcher,"show activity",pi);
    Notification notification = new Notification.BigTextStyle(builder)
            .bigText(msgText).build();

    notificationManager.notify(0,notification);
}

public NotificationManager getNotificationManager() {
    return (NotificationManager) getSystemService(NOTIFICATION_SERVICE);
}

public PendingIntent getPendingIntent() {
    return PendingIntent.getActivity(this,new Intent(this,MainActivity.class),0);
}

我甚至无法在通知中看到’msgText’.知道为什么吗？
谢谢你的帮助.