java

package com.example.ScrollView;

import android.app.Activity;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.os.Bundle;
import android.view.View;
import android.widget.ScrollView;


public class ScrollViewTest extends Activity {
 
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.scrollviewtest);
       
        ScrollView svw = (ScrollView)findViewById(R.id.scr);
       // svw.setVerticalScrollBarEnabled(false);
        svw.addView(new ColorView(this));
    }
}

class ColorView extends View{
 public ColorView(Context context){
  super (context);
 }
 
 public void onDraw(Canvas canvas){
  Paint Pnt = new Paint();
  for(int y=0; y<1024; y+=4){
   Pnt.setARGB(255, 255-y/4, 255-y, 255);
   canvas.drawRect(0, y,500,y+4,Pnt);
  }
 
 }
 
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec){
 
  setMeasuredDimension(500,1024);
 }
}

xml

<?xml version="1.0" encoding="utf-8"?>
<ScrollView
  xmlns:android="http://schemas.android.com/apk/res/android"
  android:id="@+id/scr"
  android:layout_width="fill_parent"
  android:layout_height="wrap_content">
</ScrollView>


실행하면  The application android.scrollview (process com.example.scrollvie)has stopped unexpectedly.please try again 나오는데

이유를 모르겠어요 도와주세요ㅠ.ㅠ