android 图片倾斜倒影(android图片全屏显示)

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private Bitmap createInvertedImage(){ Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.drawable.pic_1); int width = bitmap.getWidth(); int height = bitmap.getHeight(); Matrix matrix = new Matrix(); // 设置图片旋转 matrix.preScale(1, -1); //设置图片的缩放比，长度缩小一半 matrix.postScale(1, 0.5f); //图片向右倾斜 matrix.preSkew(-0.5f, 0); //倒影图片 Bitmap invertedBitmap = Bitmap.createBitmap(bitmap, 0, 0, width,height,matrix,false); //最后合成的图片 Bitmap finalInvertedBitmap = Bitmap.createBitmap(width&#;invertedBitmap.getWidth(), height&#;invertedBitmap.getHeight(), Config.ARGB_); //构建画布，把倒影和原图先画在画布上 Paint paint = new Paint(); Canvas canvas = new Canvas(finalInvertedBitmap); canvas.drawBitmap(bitmap, 0, 0, paint); //设置倒影的透明度 paint.setAlpha(); canvas.drawBitmap(invertedBitmap, 0, height, paint); //线性渐变 LinearGradient linearGradient = new LinearGradient(0, height, 0, finalInvertedBitmap.getHeight(), 0xffffff, 0xffffff, TileMode.MIRROR); paint.setShader(linearGradient); //不懂啥意思 paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN)); canvas.drawRect(0, height, width, finalInvertedBitmap.getHeight(), paint); return finalInvertedBitmap; }

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