Bitmap-把方形图片处理为圆形
这个是直接在网上转载的,自己验证可靠
转载自http://my.oschina.net/zhouz/blog/213164
直接贴上代码
import android.graphics.Bitmap; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.PorterDuff; import android.graphics.PorterDuffXfermode; import android.graphics.Rect; import android.graphics.RectF; protected Bitmap makeRoundCorner(Bitmap bitmap) { int width = bitmap.getWidth(); int height = bitmap.getHeight(); int left = 0, top = 0, right = width, bottom = height; float roundPx = height / 2; if (width > height) { left = (width - height) / 2; top = 0; right = left + height; bottom = height; } else if (height > width) { left = 0; top = (height - width) / 2; right = width; bottom = top + width; roundPx = width / 2; } Bitmap output = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(output); int color = 0xff424242; Paint paint = new Paint(); Rect rect = new Rect(left, top, right, bottom); 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; }