Android中如何生成带圆角的Bitmap图片,
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Android中如何生成带圆角的Bitmap图片,
有时候我们在开发Android应用时,会遇到圆角图片的问题,那么,我们如何在Android中用代码来生成圆角Bitmap图片呢?下面这段代码也许能够帮到你。该方法主要用到了drawRoundRect来画圆角矩形,然后通过drawBitmap来画图片。
1.[Java]代码
//生成圆角图片 public static Bitmap GetRoundedCornerBitmap(Bitmap bitmap) { try { Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), bitmap.getHeight(), Config.ARGB_8888); Canvas canvas = new Canvas(output); final Paint paint = new Paint(); final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); final RectF rectF = new RectF(new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight())); final float roundPx = 14; paint.setAntiAlias(true); canvas.drawARGB(0, 0, 0, 0); paint.setColor(Color.BLACK); 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, src, rect, paint); return output; } catch (Exception e) { return bitmap; } }
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