Android 獲得帶倒影的圖片

　　public static Bitmap createReflectionImageWithOrigin(Bitmap bitmap){

　　final int reflectionGap = 4;

　　int width = bitmap.getWidth();

　　int height = bitmap.getHeight();

　　Matrix matrix = new Matrix();

　　matrix.preScale(1, -1);

　　Bitmap reflectionImage = Bitmap.createBitmap(bitmap,

　　0, height/2, width, height/2, matrix, false);

　　Bitmap bitmapWithReflection = Bitmap.createBitmap(width, (height + height/2), Config.ARGB_8888);

　　Canvas canvas = new Canvas(bitmapWithReflection);

　　canvas.drawBitmap(bitmap, 0, 0, null);

　　Paint deafalutPaint = new Paint();

　　canvas.drawRect(0, height,width,height + reflectionGap,

　　deafalutPaint);

　　canvas.drawBitmap(reflectionImage, 0, height + reflectionGap, null);

　　Paint paint = new Paint();

　　LinearGradient shader = new LinearGradIEnt(0,

　　bitmap.getHeight(), 0, bitmapWithReflection.getHeight()

　　+ reflectionGap, 0x70ffffff, 0x00ffffff, TileMode.CLAMP);

　　paint.setShader(shader);

　　// Set the Transfer mode to be porter duff and destination in

　　paint.setXfermode(new PorterDuffXfermode(Mode.DST_IN));

　　// Draw a rectangle using the paint with our linear gradIEnt

　　canvas.drawRect(0, height, width, bitmapWithReflection.getHeight()

　　+ reflectionGap, paint);

　　return bitmapWithReflection;

　　}