//--合并两张图片 BITMAP

private Bitmap toConformBitmap(Bitmap background, Bitmap foreground) {    //--合并两张图片    if( background == null ) {        return null;    }    int bgWidth = background.getWidth();    int bgHeight = background.getHeight();    //int fgWidth = foreground.getWidth();    //int fgHeight = foreground.getHeight();    //create the new blank bitmap 创建一个新的和SRC长度宽度一样的位图    Bitmap newbmp = Bitmap.createBitmap(bgWidth, bgHeight, Bitmap.Config.ARGB_8888);    Canvas cv = new Canvas(newbmp);    //draw bg into    cv.drawBitmap(background, 0, 0, null);//在 0，0坐标开始画入bg    //draw fg into    cv.drawBitmap(foreground, 0, 0, null);//在 0，0坐标开始画入fg ，可以从任意位置画入    //save all clip    cv.save(Canvas.ALL_SAVE_FLAG);//保存    //store    cv.restore();//存储    return newbmp;}