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);

}

}