final WallpaperManager wallpaperManager = WallpaperManager.getInstance(this);
final Drawable wallpaperDrawable = wallpaperManager.getDrawable();
Bitmap bitmap = ((BitmapDrawable)wallpaperDrawable).getBitmap();

WallpaperManager wallpaperManager = WallpaperManager.getInstance(mContext);
Drawable wallpaperDrawable = wallpaperManager.getDrawable();
Bitmap bm = ((BitmapDrawable) wallpaperDrawable).getBitmap();

ImageView imageView = ((ImageView)v);
Bitmap bitmap = ((BitmapDrawable)imageView.getDrawable()).getBitmap();
int pixel = bitmap.getPixel(x,y);
int redValue = Color.red(pixel);
int blueValue = Color.blue(pixel);
int greenValue = Color.green(pixel);