/// <summary>
/// 读取本地专辑图片修改背景图
/// </summary>
async void ChangeImage()
{
//判断Local是否有文件
if (await ApplicationData.Current.LocalFolder.TryGetItemAsync(ConfigService.ImageFilename) is StorageFile localFile)//本地有专辑图片，读取
{
WriteableBitmap writeableBitmap = await FileHelper.OpenWriteableBitmapFile(localFile);
SolidColorBrush solidColorBrush = new SolidColorBrush(GetColor.GetMajorColor(writeableBitmap));
mainImageBrush.ImageSource = writeableBitmap;
mainImageBrush.Stretch = Stretch.UniformToFill;
mainGrid.Background = mainImageBrush;
solidColorBrush.Color = OtherHelper.ChangeColor(solidColorBrush.Color, (float)0.4);
backgroundBrush = solidColorBrush;
}
else//本地无专辑图片
{
SolidColorBrush solidColorBrush = new SolidColorBrush(Colors.Gray);
mainGrid.Background = solidColorBrush;
backgroundBrush = solidColorBrush;
}
}