android launcher壁纸滚动图片拉伸问题

修改源码如下，这个问题主要原因是没有根据图片实际尺寸设置壁纸大小

public static Point getDefaultWallpaperSize(Resources res, WindowManager windowManager,Activity activity) {        if (sDefaultWallpaperSize == null) {            Point realSize = new Point();            windowManager.getDefaultDisplay().getRealSize(realSize);            int maxDim = Math.max(realSize.x, realSize.y);            int minDim = Math.min(realSize.x, realSize.y);            // We need to ensure that there is enough extra space in the wallpaper            // for the intended parallax effects            final int defaultWidth, defaultHeight;            if (res.getConfiguration().smallestScreenWidthDp >= 720) {                defaultWidth = (int) (maxDim * wallpaperTravelToScreenWidthRatio(maxDim, minDim));                defaultHeight = maxDim;            } else {                defaultWidth = Math.max((int) (minDim * WALLPAPER_SCREENS_SPAN), maxDim);//此处就是屏幕壁纸宽度，这个宽度是写死的，所以图片会被放大拉伸                defaultHeight = maxDim;            }            sDefaultWallpaperSize = new Point(defaultWidth, defaultHeight);        }        return sDefaultWallpaperSize;    }

修改后的代码如下，主要是因为宽度不够导致,增加一个图片宽度int outWidth

public static Point getDefaultWallpaperSize(Resources res, WindowManager windowManager,Activity activity，int outWidth) {        //if (sDefaultWallpaperSize == null) {//注释这个代码            Point realSize = new Point();            windowManager.getDefaultDisplay().getRealSize(realSize);            int maxDim = Math.max(realSize.x, realSize.y);            int minDim = Math.min(realSize.x, realSize.y);            // We need to ensure that there is enough extra space in the wallpaper            // for the intended parallax effects            final int defaultWidth, defaultHeight;            if (res.getConfiguration().smallestScreenWidthDp >= 720) {                defaultWidth = (int) (maxDim * wallpaperTravelToScreenWidthRatio(maxDim, minDim));                defaultHeight = maxDim;            } else {                //defaultWidth = Math.max((int) (minDim * WALLPAPER_SCREENS_SPAN), maxDim);//此处就是屏幕壁纸宽度，这个宽度是写死的，所以图片会被放大拉伸                if(outWidth < minDim){

                 defaultWidth = minDim;              }else{                 defaultWidth = outWidth;              }              defaultHeight = maxDim;          }          sDefaultWallpaperSize = new Point(defaultWidth, defaultHeight);

//}//注释这个代码
return sDefaultWallpaperSize; }

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