android桌布相關

1. final WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);   
2. final Drawable wallpaperDrawable = wallpaperManager.getDrawable(); 
3. 可取得桌布圖
4.   int newWidth = instance.getDesiredMinimumWidth(); 
            int newHeight = instance.getDesiredMinimumHeight();  
5. 可取的桌面長寬