我正在尝试将圆形位图绘制到画布中。如果我想要绘制的画布是透明的,则位图会被正确剪裁,但如果我之前使用不同的颜色绘制了一个矩形则不会。
继承人我得到了什么
paint.setColor(col.colors_Form[1]);
mCanvas.drawRect(0, 0, dim.titleContainer_Width, dim.titleContainer_Height, paint);
[...]
if (!mFormValues_BasicInformation.get(0).getAvatarImage().equals("")) {
mCanvas.save();
mCanvas.translate(300, 300);
byte[] byteArray = mFormValues_BasicInformation.get(0).getAvatarImage();
Bitmap bmp = Bitmap.createScaledBitmap(BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length), 250, 250, false);
final int color = col.colors_Form[1];
final Paint avatarPaint = new Paint();
final Rect rect = new Rect(0, 0, bmp.getWidth(),
bmp.getHeight());
avatarPaint.setAntiAlias(true);
mCanvas.drawARGB(0, 0, 0, 0);
avatarPaint.setColor(color);
mCanvas.drawCircle(bmp.getWidth() / 2,
bmp.getHeight() / 2, bmp.getWidth() / 2, paint);
avatarPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.SRC_IN));
mCanvas.drawBitmap(bmp, rect, rect, avatarPaint);
bmp.recycle();
mCanvas.restore();
}
有人知道如何解决这个问题吗? Thx提前! :)
答案 0 :(得分:1)
BitmapShader完成了这个伎俩:
[...]
byte[] byteArray = mFormValues_BasicInformation.get(0).getAvatarImage();
Bitmap bmp = Bitmap.createScaledBitmap(BitmapFactory.decodeByteArray(byteArray, 0, byteArray.length), 500, 500, false);
final Paint avatarPaint = new Paint();
BitmapShader shader = new BitmapShader(bmp, BitmapShader.TileMode.CLAMP, BitmapShader.TileMode.CLAMP);
avatarPaint.setShader(shader);
avatarPaint.setAntiAlias(true);
float r = Math.min(bmp.getWidth(), bmp.getHeight()) / 2f;
mCanvas.drawCircle(r, r, r, avatarPaint);
bmp.recycle();
[...]
其他信息: