Java端小图平铺合并成一个大图的代码

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平铺合并

pc版本测试成功

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/**
 * 将一个小图从左到右, 从上到下  连续的合并为一个大图
 * @param srcPng 需要合成的小图片路径及名称
 * @param outPng 合成结果的路径及名称
 * @param width  结果图片的宽
 * @param height 结果图片的高
 */
private static void overlapSmall(String srcPng, String outPng, int width, int height) {
    try {
        File srcFile = new File(srcPng);
        Image bg_src = javax.imageio.ImageIO.read(srcFile);

        int src_width = bg_src.getWidth(null);
        int src_height = bg_src.getHeight(null);
        BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

        Graphics2D g2d = tag.createGraphics();

        int row = 0;
        int column = 0;
        if(0 == width%src_width){
            column = width/src_width;
        }else{
            column = width/src_width + 1;
        }
        if(0 == height%src_height){
            row = height/src_height;
        }else{
            row = height/src_height + 1;
        }

        //g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, 1.0f)); // 透明度设置
        int x = 0;
        int y = 0;
        for(int i = 0; i < column; ++i){
            y = 0;
            for (int j = 0; j < row; ++j) {
                g2d.drawImage(bg_src, x, y, src_width, src_height, null);
                y += src_width;
            }
            x += src_height;
        }
        //g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER)); // 透明度设置 结束

        FileOutputStream out = new FileOutputStream(outPng);
        ImageIO.write(tag, "png", out);// 写图片
        out.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
}

android 平台测试成功

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private static Bitmap overlapSmallToBitmap(Context context, int srcPng, int width, int height) {
    Bitmap bitmap = null;
    try {
        InputStream is = context.getResources().openRawResource(srcPng);
        Bitmap bg_src = BitmapFactory.decodeStream(is);

        int src_width = bg_src.getWidth();
        int src_height = bg_src.getHeight();

        bitmap = Bitmap.createBitmap(width, height, bg_src.getConfig());
        Canvas canvas = new Canvas(bitmap);
        // Paint paint = new Paint();
        // paint.setColor(Color.BLACK);
        // paint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.DARKEN));

        int row = 0;
        int column = 0;
        if(0 == width%src_width){
            column = width/src_width;
        }else{
            column = width/src_width + 1;
        }
        if(0 == height%src_height){
            row = height/src_height;
        }else{
            row = height/src_height + 1;
        }

        int x = 0;
        int y = 0;
        for(int i = 0; i < column; ++i){
            y = 0;
            for (int j = 0; j < row; ++j) {
                canvas.drawBitmap(bg_src, x, y, null);
                y += src_width;
            }

            x += src_height;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return (bitmap);
}