我知道答案，但也许有些人有其他更好的解决方案。
public Bitmap toSephia(Bitmap bmpOriginal){ int width, height, r,g, b, c, gry; height = bmpOriginal.getHeight(); width = bmpOriginal.getWidth(); int depth = 20; Bitmap bmpSephia = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888); Canvas canvas = new Canvas(bmpSephia); Paint paint = new Paint(); ColorMatrix cm = new ColorMatrix(); cm.setScale(.3f, .3f, .3f, 1.0f); ColorMatrixColorFilter f = new ColorMatrixColorFilter(cm); paint.setColorFilter(f); canvas.drawBitmap(bmpOriginal, 0, 0, paint); for(int x=0; x < width; x++) { for(int y=0; y < height; y++) { c = bmpOriginal.getPixel(x, y); r = Color.red(c); g = Color.green(c); b = Color.blue(c); gry = (r + g + b) / 3; r = g = b = gry; r = r + (depth * 2); g = g + depth; if(r > 255) { r = 255; } if(g > 255) { g = 255; } bmpSephia.setPixel(x, y, Color.rgb(r, g, b)); } } return bmpSephia;}
