android多媒体编程--复制图片

package com.example.copyimage;

import android.os.Bundle;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Matrix;
import android.graphics.Paint;
import android.view.Menu;
import android.widget.ImageView;

public class MainActivity extends Activity {
    private ImageView src;
    private ImageView copy;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        Bitmap bitmapsrc = BitmapFactory.decodeFile("sdcard/IMG_1392.JPG");
        //这是一张只有宽高和配置的白纸
        Bitmap bitmapcopy = Bitmap.createBitmap(bitmapsrc.getWidth(), bitmapsrc.getHeight(), bitmapsrc.getConfig());
        //画笔
        Paint paint = new Paint();
        //画板,并且把纸铺在画板上
        Canvas canvas = new Canvas(bitmapcopy);
        //开始作画,按照原图绘画
        canvas.drawBitmap(bitmapsrc, new Matrix(), paint);
        src = (ImageView) findViewById(R.id.src);
        copy = (ImageView) findViewById(R.id.copy);
        src.setImageBitmap(bitmapsrc);
        copy.setImageBitmap(bitmapcopy);
        
    }


}