Android Studio 预期的类或包错误

Question

我不明白为什么会出现这个错误。我正在创建一个警报按钮，通过振动向用户发送通知。

“new NotificationCompat()”是我的错误所在。

代码如下:

public class AlertReceiver extends BroadcastReceiver{
    @Override
    public void onReceive(Context context, Intent intent) {

        createNotification(context, "It Is Time To Stand Up!","20 Minutes Have Passed", "Alert");

    }

    public void   createNotification(Context context, String msg, String msgText, String msgAlert ) {

        PendingIntent notificIntent = PendingIntent.getActivity(context,0,new Intent(context,CustomizeAlertsPage.class),0);

        NotificationCompat.Builder mBuilder = new NotificationCompat().Builder(context)
                .setLargeIcon(R.drawable.ALERT)
                .setContentTitle(msg)
                .setTicker(msgAlert)
                .setContentText(msgText);

        mBuilder.setContentIntent(notificIntent);
        mBuilder.setDefaults(NotificationCompat.DEFAULT_VIBRATE);
        mBuilder.setAutoCancel(true);

        NotificationManager mNotificationManager =
                (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);

        mNotificationManager.notify(1,mBuilder.build());

    }
}

Answer 1

改变

NotificationCompat.Builder mBuilder = new NotificationCompat().Builder(context)

到

NotificationCompat.Builder mBuilder = new NotificationCompat.Builder(context)