图片旋转

package com.gyarmy.imgetest02;

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.os.Bundle;
import android.os.Environment;
import android.view.View;
import android.widget.ImageView;

public class MainActivity extends Activity {
	
	private ImageView img_src;
	private ImageView img_dst;

	@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        
        img_src = (ImageView) findViewById(R.id.img_src);
        img_dst = (ImageView) findViewById(R.id.img_dst);
        
    }
	
	
	public void getPIC(View v){
		
		//加载原图
		String path = Environment.getExternalStorageDirectory().toString();
    	path = path+"/Download/02.jpg";
    	Bitmap fileImg = BitmapFactory.decodeFile(path);
    	img_src.setImageBitmap(fileImg);
    	
    	
    	//依照原图，重新绘图
    	Bitmap dstBitmap = Bitmap.createBitmap(fileImg.getWidth(), fileImg.getHeight(), fileImg.getConfig());
    	Canvas cas = new Canvas(dstBitmap);
    	Paint paint = new Paint();

    	//设置规则
    	Matrix matrix = new Matrix();
    	//缩放
    	matrix.setScale(0.4f, 0.4f);
    	//旋转
    	matrix.setRotate(40, dstBitmap.getWidth()/2f, dstBitmap.getHeight()/2f);
    	
    	//画图
    	cas.drawBitmap(fileImg, matrix, paint);
    	
    	
    	img_dst.setImageBitmap(dstBitmap);
    	
    	
    	
		
	}


    
}