android 自定义控件央视,androidstudio 自定义控件

我定义了一个控件继承View

但是提示说：

The following classes could not be found

控件：

package com.example.melo.myapp1;

import android.content.Context;

import android.graphics.Canvas;

import android.graphics.Color;

import android.graphics.Paint;

import android.util.AttributeSet;

import android.view.View;

/**

* Created by melo on 2015/7/23.

*/

public class MyView extends View{

public MyView(Context context){

super(context);

}

@Override

protected void onDraw(Canvas canvas) {

Paint paint = new Paint();

paint.setColor(Color.RED);

}

}

大家帮忙看一下