/**     * 使用Matrix将Bitmap压缩到指定大小     * @param bitmap     * @param w     * @param h     * @return     */    public static Bitmap resizeBitmap(Bitmap bitmap, int w, int h)    {        int width = bitmap.getWidth();        int height = bitmap.getHeight();        float scaleWidth = ((float) w) / width;        float scaleHeight = ((float) h) / height;        Matrix matrix = new Matrix();        matrix.postScale(scaleWidth, scaleHeight);        Bitmap resizedBitmap = Bitmap.createBitmap(bitmap, 0, 0, width,                height, matrix, true);        return resizedBitmap;    }    /**     * 给Bitmap设置圆角     * @param bitmap     * @param roundPx  圆角值     * @return     */    public static Bitmap getRoundedCornerBitmap(Bitmap bitmap,float roundPx){        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap                .getHeight(), Bitmap.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(PorterDuff.Mode.SRC_IN));        canvas.drawBitmap(bitmap, rect, rect, paint);        return output;    }    /**     * 得到圆形图片     * @param bitmap     * @return     */    public static Bitmap getOvalBitmap(Bitmap bitmap){        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap                .getHeight(), Bitmap.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(PorterDuff.Mode.SRC_IN));        canvas.drawBitmap(bitmap, rect, rect, paint);        return output;    }