- 时间:2021-09-16 07:37 编辑: 来源: 阅读:
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摘要:如何使用Matrix对bitmap的旋转与镜像水平垂直翻转
Bitmap convert(Bitmap a, int width, int height)
{
int w = a.getWidth();
int h = a.getHeight();
Bitmap newb = Bitmap.createBitmap(ww, wh, Config.ARGB_8888);// 创建一个新的和SRC长度宽度一样的位图
Canvas cv = new Canvas(newb);
Matrix m = new Matrix();
[b]m.postScale(1, -1); //镜像垂直翻转
m.postScale(-1, 1); //镜像水平翻转
[/b]m.postRotate(-90); //旋转-90度
Bitmap new2 = Bitmap.createBitmap(a, 0, 0, w, h, m, true);
cv.drawBitmap(new2, new Rect(0, 0, new2.getWidth(), new2.getHeight()),new Rect(0, 0, ww, wh), null);
return newb;
}