danielkon96

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
             xmlns:CV="clr-namespace:CarouselView.FormsPlugin.Abstractions;assembly=CarouselView.FormsPlugin.Abstractions"
             xmlns:FFImage="clr-namespace:FFImageLoading.Forms;assembly=FFImageLoading.Forms"
             xmlns:FFImageCache="clr-namespace:FFImageLoading.Cache;assembly=FFImageLoading"
             mc:Ignorable="d"
             x:Class="MultiImagePicker.ImageSelectionPage">

danielkon96

All three projects:
- CarouselView.FormsPlguin 
- Microsoft.Azure.Storage.Blob
- Xam.Plugin.Media
- Xamarin.FFImageLoading.Forms

MultiImagePicker Project:
- Plugin.Permissions

MultiImagePicker.Android Project:

danielkon96

private async void SelectImagesButton_Clicked(object sender, EventArgs e)
{
    //Check users permissions.
    var storagePermissions = await CrossPermissions.Current.CheckPermissionStatusAsync(Permission.Storage);
    var photoPermissions = await CrossPermissions.Current.CheckPermissionStatusAsync(Permission.Photos);
    if (storagePermissions == PermissionStatus.Granted && photoPermissions == PermissionStatus.Granted)
    {
        //If we are on iOS, call GMMultiImagePicker.
        if (Device.RuntimePlatform == Device.iOS)
        {

danielkon96

/// <summary>
///     Make sure Permissions are given to the users storage.
/// </summary>
/// <returns></returns>
private async Task<bool> AskForPermissions()
{
    try
    {
        await CrossMedia.Current.Initialize();

danielkon96

public ImageSelectionPage()
{
    InitializeComponent();
    //Ask for permissions.
    Device.BeginInvokeOnMainThread(async () => await AskForPermissions() );
}

danielkon96

//For iOS
MessagingCenter.Unsubscribe<App, List<string>>((App)Xamarin.Forms.Application.Current, "ImagesSelectediOS");
MessagingCenter.Subscribe<App, List<string>>((App)Xamarin.Forms.Application.Current, "ImagesSelectediOS", (s, images) =>
{
    //If we have selected images, put them into the carousel view.
    if (images.Count > 0)
    {
        ImgCarouselView.ItemsSource = images;
        InfoText.IsVisible = true; //InfoText is optional
    }

danielkon96

/// <summary>
///     Unsubsribe from the MessagingCenter on disappearing.
/// </summary>
protected override void OnDisappearing()
{
    base.OnDisappearing();
    MessagingCenter.Unsubscribe<App, List<string>>((App)Xamarin.Forms.Application.Current, "ImagesSelectedAndroid");
    MessagingCenter.Unsubscribe<App, List<string>>((App)Xamarin.Forms.Application.Current, "ImagesSelectediOS");
    GC.Collect();
}

danielkon96

/// <summary>
/// Code implementation found in Android Project -> MediaService.cs
/// </summary>
public interface IMediaService
{
  void OpenGallery();
  void ClearFileDirectory();
}

danielkon96

private async void UploadImagesButton_Clicked(object sender, EventArgs e)
{
    // Get the list of images we have selected.
    List<string> imagePaths = ImgCarouselView.ItemsSource as List<string>;

    // If user is using Android, compress the images. (Optional)
    if (Device.RuntimePlatform == Device.Android)
    {
        imagePaths = CompressAllImages(imagePaths);
    }

danielkon96

/// <summary>
///     Compress Android images before uploading them to Azure Blob Storage.
/// </summary>
/// <param name="totalImages"></param>
/// <returns></returns>
private List<string> CompressAllImages(List<string> totalImages)
{
    int displayCount = 1;
    int totalCount = totalImages.Count;
    List<string> compressedImages = new List<string>();