Android--Bitmap處理、圓角、圓形

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    /**     * 轉換圖片成圓形     *      * @param bitmap     *            傳入Bitmap對象     * @return     */    public static Bitmap toRoundBitmap(Bitmap bitmap) {        int width = bitmap.getWidth();        int height = bitmap.getHeight();        float roundPx;        float left, top, right, bottom, dst_left, dst_top, dst_right, dst_bottom;        if (width <= height) {            roundPx = width / 2;            top = 0;            bottom = width;            left = 0;            right = width;            height = width;            dst_left = 0;            dst_top = 0;            dst_right = width;            dst_bottom = width;        } else {            roundPx = height / 2;            float clip = (width - height) / 2;            left = clip;            right = width - clip;            top = 0;            bottom = height;            width = height;            dst_left = 0;            dst_top = 0;            dst_right = height;            dst_bottom = height;        }        Bitmap output = Bitmap.createBitmap(width, height, Config.ARGB_8888);        Canvas canvas = new Canvas(output);        final int color = 0xff424242;        final Paint paint = new Paint();        final Rect src = new Rect((int) left, (int) top, (int) right,                (int) bottom);        final Rect dst = new Rect((int) dst_left, (int) dst_top,                (int) dst_right, (int) dst_bottom);        final RectF rectF = new RectF(dst);        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, src, dst, paint);        return output;    }    /**     * to圓角Bitmap     * @param bitmap     * @return     */    public static Bitmap getRoundedCornerBitmap(Bitmap bitmap,float roundPx) {        try {            Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),                    bitmap.getHeight(), Config.ARGB_8888);            Canvas canvas = new Canvas(output);            final int color = 0xff424242;// 顏色值（0xff---alpha）            final Paint paint = new Paint();            final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());            final RectF rectF = new RectF(rect);// Rect是使用int類型作為數值，RectF是使用float類型作為數值            // --------消除鋸齒-------//            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));            final Rect src = new Rect(0, 0, bitmap.getWidth(),                    bitmap.getHeight());            canvas.drawBitmap(bitmap, null, rect, paint);            return output;        } catch (Exception e) {            e.printStackTrace();            return null;        }    }