- 论坛徽章:
- 0
|
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。
Java代码- 1.//生成圆角图片
- 2.public static Bitmap GetRoundedCornerBitmap(Bitmap bitmap) {
- 3. try {
- 4. Bitmap output = Bitmap.createBitmap(bitmap.getWidth(),
- 5. bitmap.getHeight(), Config.ARGB_8888);
- 6. Canvas canvas = new Canvas(output);
- 7. final Paint paint = new Paint();
- 8. final Rect rect = new Rect(0, 0, bitmap.getWidth(),
- 9. bitmap.getHeight());
- 10. final RectF rectF = new RectF(new Rect(0, 0, bitmap.getWidth(),
- 11. bitmap.getHeight()));
- 12. final float roundPx = 14;
- 13. paint.setAntiAlias(true);
- 14. canvas.drawARGB(0, 0, 0, 0);
- 15. paint.setColor(Color.BLACK);
- 16. canvas.drawRoundRect(rectF, roundPx, roundPx, paint);
- 17. paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN));
- 18.
- 19. final Rect src = new Rect(0, 0, bitmap.getWidth(),
- 20. bitmap.getHeight());
- 21.
- 22. canvas.drawBitmap(bitmap, src, rect, paint);
- 23. return output;
- 24. } catch (Exception e) {
- 25. return bitmap;
- 26. }
- 27.}
复制代码 |
|