bitmap 翻转及镜像方法

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(); m.postScale(1, -1); //镜像垂直翻转 m.postScale(-1, 1); //镜像水平翻转 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; }