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;    }}
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