Android图片圆角

MainActivity.java

package com.xzq.imageviewroundconcer;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PorterDuff.Mode;
import android.graphics.PorterDuffXfermode;
import android.graphics.Rect;
import android.graphics.RectF;
import android.os.Bundle;
import android.view.Menu;
import android.widget.ImageView;

/**
 * @author XZQ
 * @see http://blog.csdn.net/cmdkmd?viewmode=contents
 */
public class MainActivity extends Activity {

    private ImageView roundImage;// 需要处理的图片

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        findViewById();
        processBiz();

    }

    /**
     * 业务的处理
     */
    private void processBiz() {
        Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.a);
        roundImage.setImageBitmap(getRoundCornerImage(bitmap));

    }

    /**
     * 圆角的处理
     * 
     * @param bitmap
     */
    private static Bitmap getRoundCornerImage(Bitmap bitmap) {

        Bitmap oldBitmap = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888);// 创建一个原图
        Canvas canvas = new Canvas(oldBitmap);// 创建带有位图roundConcerImage的画布
        Paint paint = new Paint();// 创建画笔
        Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());// 创建一个和原始图片一样大小的矩形
        RectF rectf = new RectF(rect);
        paint.setAntiAlias(true);// 去锯齿
        canvas.drawRoundRect(rectf, 50, 50, paint);// 画一个和原始图片一样大小的圆角矩形
        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); // 设置相交模式
        canvas.drawBitmap(bitmap, null, rect, paint); // 把图片画到矩形去
        return oldBitmap;
    }

    /**
     * 页面空间初始化
     */
    private void findViewById() {
        roundImage = (ImageView) findViewById(R.id.img_concer);
    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }
}

下载地址: http://download.csdn.net/detail/cmdkmd/4664988