Bitmap长方形图片加载为圆形图片

package com.lib.andlib_libtemp.example.dir.exam1;

import android.graphics.Bitmap;import android.graphics.Matrix;import android.view.View;

import com.lib.andlib_libtemp.utils.LogUtil;

/** * Created by envy15 on 2016/6/16. * 根据View的比例剪切图片大小工具类 * 剪切模式：中间、上、下 */public class BitmapCatUtil {    public static Bitmap imageCatByCenter(View mView, Bitmap source) {        //先获取View的高度，获取失败将返回原图        getImageViewPixSize(mView);        /**         * 获取图片Bitmap的宽高         */        int suWidth = source.getWidth();        int suHeight = source.getHeight();        if(ivWidth == 0 || ivHeight == 0)        {            LogUtil.infoE("获取View宽高失败：ivHeight=" + ivHeight +"  ivWidth=" + ivWidth);            return source;        }

        /**         * Y方向上应该截取的长度         */        int yAxisAdd = ivHeight * suWidth / ivWidth;

        if (yAxisAdd == suHeight) {   //!!!            //裁剪的宽高与图片的宽高一样时，bitmap的返回的引用是source，因此不能回收，直接返回            //回收抛异常：java.lang.IllegalStateException: Transformation SizeTransformation returned input Bitmap but recycled it            return source;        } else {            //按比例截取多余的高度            if (yAxisAdd < suHeight)   //截取的高度需小于源图片的高度            {                //(起点左边，截取宽度，截取高度)                Bitmap bitmap = Bitmap.createBitmap(source,                        0, suHeight / 2 - yAxisAdd / 2,                        suWidth,yAxisAdd);                source.recycle();                return bitmap;            } else { //否则需按比例截取宽度                int xAxisAdd = ivWidth * suHeight / ivHeight;                Bitmap bitmap = Bitmap.createBitmap(source,                        suWidth / 2 - xAxisAdd / 2, 0,                        xAxisAdd, suHeight);                source.recycle();

                return bitmap;            }        }    }

    /**     * 返回图片控件表示的宽高像素大小     * 必须指定图片的大小，wrap_content/match_parent均无法获取宽高     * 参考     * http://blog.csdn.net/crazy1235/article/details/41806079     */    private static int ivHeight;    private static int ivWidth;    private static void getImageViewPixSize(View imageView) {        //获取宽高OK        ivHeight = imageView.getLayoutParams().height;        ivWidth = imageView.getLayoutParams().width;    }

    /**     * 获取Bitmap缩放比例     */    public static float catScale(View mView, Bitmap bitmap) {        return mView.getLayoutParams().height*1.0f/bitmap.getHeight();    }

    /**     * Bitmap放大/缩小的方法     * @param bitmap     * @return bitmap     */    public static Bitmap bitmapScaling(Bitmap bitmap,float scale) {        Matrix matrix = new Matrix();        matrix.postScale(scale,scale); //长和宽放大缩小的比例        Bitmap resizeBmp = Bitmap.createBitmap(bitmap,0,0,bitmap.getWidth(),bitmap.getHeight(),matrix,true);        return resizeBmp;    }}

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package com.lib.andlib_libtemp.example.dir.exam1;

import android.graphics.Bitmap;import android.graphics.Canvas;import android.graphics.Color;import android.graphics.Paint;import android.graphics.PorterDuff;import android.graphics.PorterDuffXfermode;import android.graphics.Rect;import android.graphics.RectF;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.view.View;

/** * Created by envy15 on 2016/6/16. * 位图的绘制工具类：圆角 * */public class BitmapShapeUtil {    /**四个圆角的圆角图片     * 四个圆角，roundRadius = bitmap.getWidth()/2 绘制为圆形图像     * @param bitmap 位图     * @param roundRadius 圆角大小     * @return 圆角图片     */    public static Bitmap getRoundedCornerBitmap(Bitmap bitmap,float roundRadius) {        // 创建一个指定宽度和高度的空位图对象        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),                bitmap.getHeight(), Bitmap.Config.ARGB_8888);        // 用该位图创建画布        Canvas canvas = new Canvas(output);        // 画笔对象        final Paint paint = new Paint();        // 画笔的颜色        final int color = 0xff424242;        // 矩形区域对象        final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());        // 未知        final RectF rectF = new RectF(rect);        // 拐角的半径        final float roundPx = roundRadius;        // 消除锯齿        paint.setAntiAlias(true);        // 画布背景色        canvas.drawARGB(0, 0, 0, 0);        // 设置画笔颜色        paint.setColor(color);        // 绘制圆角矩形        canvas.drawRoundRect(rectF, roundPx, roundPx, paint);        // 未知        paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));        // 把该图片绘制在该圆角矩形区域中        canvas.drawBitmap(bitmap, rect, rect, paint);        // 最终在画布上呈现的就是该圆角矩形图片，然后我们返回该Bitmap对象        return output;    }

    /**可实现动态绘制圆角     * 生成四个圆角的背景     * @param mView 根据View计算Drawable大小     * @param roundRadius 绘制半径     * @return Drawable     * exam imageView.setBackground(BitmapShapeUtil.getRoundedCornerDrawable(imageView,imageView.     *       getLayoutParams().width/5, Color.GRAY));     */    public static Drawable getRoundedCornerDrawable(View mView, float roundRadius,int color) {        int hight = mView.getLayoutParams().height;        int width = mView.getLayoutParams().width;        Bitmap rounder = Bitmap.createBitmap(width, hight, Bitmap.Config.ARGB_8888);        Canvas canvas = new Canvas(rounder);        Paint xferPaint = new Paint(Paint.ANTI_ALIAS_FLAG);        xferPaint.setColor(color);        canvas.drawRoundRect(new RectF(0, 0, width, hight), roundRadius, roundRadius, xferPaint);        xferPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DST_IN));        canvas.drawBitmap(rounder, 0, 0, null);        canvas.drawBitmap(rounder, 0, 0, xferPaint);

        Drawable drawable = new BitmapDrawable(rounder);        return drawable;    }}

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    @Override    public void initDatas() {        LogUtil.infoD(this, "initDatas");        //OK        Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.mipmap.image_girl_test1);        LogUtil.infoE(this,bitmap.getHeight()+" "+bitmap.getWidth());        //裁剪图片        bitmap = BitmapCatUtil.imageCatByCenter(imageView,bitmap);        LogUtil.infoE(this,bitmap.getHeight()+" "+bitmap.getWidth());        LogUtil.infoE(this,imageView.getLayoutParams().height+" "+imageView.getLayoutParams().width);        //缩放处理        bitmap = BitmapCatUtil.bitmapScaling(bitmap,BitmapCatUtil.catScale(imageView,bitmap));        //圆角处理        Bitmap roundedCornerBitmap = BitmapShapeUtil.getRoundedCornerBitmap(                bitmap,bitmap.getWidth()/2);        imageView.setImageBitmap(roundedCornerBitmap);

//        imageView.setBackground(BitmapShapeUtil.getRoundedCornerDrawable(imageView,imageView.//                getLayoutParams().width/5, Color.GRAY));

    }