如何让用户使用xamarin媒体插件从图库中选择图像并重命名图像

<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />

<key>NSPhotoLibraryUsageDescription</key>
<string>Access to photo library is required to select images.</string>

using Plugin.Media;
using Plugin.Media.Abstractions;
using Xamarin.Forms;

public partial class ImageSelectionPage : ContentPage
{
    public ImageSelectionPage()
    {
        InitializeComponent();
    }

    private async void SelectImage_Clicked(object sender, EventArgs e)
    {
        if (!CrossMedia.Current.IsPickPhotoSupported)
        {
            await DisplayAlert("Error", "Picking a photo is not supported on this device", "OK");
            return;
        }

        var options = new PickMediaOptions()
        {
            PhotoSize = PhotoSize.Medium
        };

        var file = await CrossMedia.Current.PickPhotoAsync(options);

        if (file == null)
            return;

        // 获取选择的图像路径
        var imagePath = file.Path;

        // 重命名图像
        var renamedImagePath = RenameImage(imagePath);

        // 处理图像或保存路径等操作
        // ...

        file.Dispose();
    }

    private string RenameImage(string imagePath)
    {
        // 重命名图像的逻辑
        // ...

        return renamedImagePath;
    }
}