android 利用Bitmap获取圆角矩形、圆形图片

1.在很多时候，我们要显示图片资源，需要将他的资源显示为圆角的；示例源码如下：

public static Bitmap getRoundedCornerBitmap(Bitmap bitmap,float roundPx){    

            

        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap    

                .getHeight(), Config.ARGB_8888);    

        Canvas canvas = new Canvas(output);    

     

        final int color = 0xff424242;    

        final Paint paint = new Paint();    

        final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());    

        final RectF rectF = new RectF(rect);    

     

        paint.setAntiAlias(true);    

        canvas.drawARGB(0, 0, 0, 0);    

        paint.setColor(color);    

        canvas.drawRoundRect(rectF, roundPx, roundPx, paint); 

     

        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));    

        canvas.drawBitmap(bitmap, rect, rect, paint);    

     

        return output;    

    }    

注意：bitmap为图片资源；roundPx圆角的角度值float;

2.得到圆形资源图片。

public static Bitmap getOvalBitmap(Bitmap bitmap){    

        

        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap    

                .getHeight(), Config.ARGB_8888);    

        Canvas canvas = new Canvas(output);   

        

        final int color = 0xff424242;    

        final Paint paint = new Paint();    

        final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); 

        

        final RectF rectF = new RectF(rect); 

     

        paint.setAntiAlias(true);    

        canvas.drawARGB(0, 0, 0, 0);    

        paint.setColor(color);    

        

        canvas.drawOval(rectF, paint);

     

        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));    

        canvas.drawBitmap(bitmap, rect, rect, paint);    

        return output;  

    }    

注：以上代码均经测试实用，复制即可使用；如有问题请留言交谈；