图片处理，圆形圆角描边

 1.圆形描边

public static Bitmap getCircleCornerBitmap(Bitmap source,int strokeWidth){
        if (source == null || source.isRecycled()) {
            return null;
        }
        int srcBitmapWidth = source.getWidth();
        int srcBitmapHeight = source.getHeight();
        boolean isY;//是否根据y轴来切
        int targetLength=(isY=srcBitmapWidth

2.圆角

public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, int pixels) {
    Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
            bitmap.getHeight(), Bitmap.Config.ARGB_8888);
    Canvas canvas = new Canvas(output);

    final int color = 0xff000000;
    final Paint paint = new Paint();
    final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight());
    final RectF rectF = new RectF(rect);
    final float roundPx = pixels;

    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;
}

透明度

100% — FF 
95% — F2 
90% — E6 
85% — D9 
80% — CC 
75% — BF 
70% — B3 
65% — A6 
60% — 99 
55% — 8C 
50% — 80 
45% — 73 
40% — 66 
35% — 59 
30% — 4D 
25% — 40 
20% — 33 
15% — 26 
10% — 1A 
5% — 0D 
0% — 00 
格式如#00FFFFFF，前两位代表不透明度的十六进制。00表示完全透明，FF就是全不透明。依次递增。