android Bitmap 원 각 과 그림자 의 구체 적 인 실현 코드

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/** 
     *        
     *  
     * @param bitmap 
     * @param roundPx 
     * @return 
     */ 
    public static Bitmap getRoundedCornerBitmap(Bitmap bitmap, float roundPx) { 
        Bitmap output = Bitmap.createBitmap(bitmap.getWidth(), 
                bitmap.getHeight(), Config.ARGB_8888); 
        Canvas canvas = new Canvas(output); 
        final int color = 0xff424242; 
        final Paint paint = new Paint(); 
        final Rect rect = new Rect(0, 0, bitmap.getWidth(), bitmap.getHeight()); 
        final RectF rectF = new RectF(rect); 
        paint.setAntiAlias(true); 
        canvas.drawARGB(0, 0, 0, 0); 
        paint.setColor(color); 
        canvas.drawRoundRect(rectF, roundPx, roundPx, paint); 
        paint.setXfermode(new PorterDuffXfermode(Mode.SRC_IN)); 
        canvas.drawBitmap(bitmap, rect, rect, paint); 
        return output; 
    } 

    /** 
     *        
     *  
     * @return 
     */ 
    public boolean createReflectedImages() { 
        //             
        final int reflectionGap = 4; 
        int index = 0; 
        for (GalleryWith3DData imageId : mImageIds) { 
            //          bitmap   
            Bitmap originalImage = BitmapFactory.decodeResource( 
                    mContext.getResources(), imageId.getInteger()); 
            int width = originalImage.getWidth(); 
            int height = originalImage.getHeight(); 
            //        
            Matrix matrix = new Matrix(); 
            //     (x   ，y   ) 
            matrix.preScale(1, -1); 
            //            ，        ，     1/2      
            Bitmap reflectionImage = Bitmap.createBitmap(originalImage, 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(getRoundedCornerBitmap(originalImage, 20), 0, 0, 
                    null); 
            int len = imageId.getstr().length(); 
            double lenWeght = len * 50 * 0.9; 
            int ban = width / 2; 
            int ban1 = (int) (lenWeght / 2); 
            int hua = ban - ban1; 
            if (imageId.getFlagRecommend()) { 
                canvas.rotate(30); 
                canvas.drawText(mStrRecommend, hua - 20, 150, 
                        createPaint(Color.RED)); 
                canvas.rotate(-30); 
            } 
            Paint deafaultPaint = new Paint(); 
            deafaultPaint.setAntiAlias(false); 
            canvas.drawBitmap(getRoundedCornerBitmap(reflectionImage, 20), 0, 
                    height + reflectionGap, null); 
            Paint paint = new Paint(); 
            paint.setAntiAlias(false); 
            /** 
             *    :        x  ，    : y   ，      :        ，          ， 
             *        Gradient   Shader ，      Paint setShader          
             */ 
            LinearGradient shader = new LinearGradient(0, 
                    originalImage.getHeight(), 0, 
                    bitmapWithReflection.getHeight() + reflectionGap, 
                    0x70ffffff, 0x00ffffff, TileMode.MIRROR); 
            //      
            paint.setShader(shader); 
            paint.setXfermode(new PorterDuffXfermode( 
                    android.graphics.PorterDuff.Mode.DST_IN)); 
            //                       
            canvas.drawRect(0, height, width, bitmapWithReflection.getHeight() + reflectionGap, paint); 
            canvas.drawText(imageId.getstr(), hua, 430, 
                    createPaint(Color.WHITE)); 
            //     ImageView         bitmapWithReflection 
            ImageView imageView = new ImageView(mContext); 
            imageView.setImageBitmap(bitmapWithReflection); 
            //   imageView   ，             
            imageView.setLayoutParams(new GalleryWith3D.LayoutParams(150, 250)); 
            // imageView.setScaleType(ScaleType.MATRIX); 
            mImages[index++] = imageView; 
        } 
        return true; 
    } 

다음은 효과 그림