public async void OpenScanner()
{
var ScannerPage = new ZXingScannerPage();
ScannerPage.IsScanning = true;
ScannerPage.OnScanResult += (result) => {
ScannerPage.IsScanning = false;
Device.BeginInvokeOnMainThread(async() => {
string[] values = result.Text.Split('*');
if (values.Length == 3)
{
Contact contact = new Contact();
contact.FirstName = values[0];
contact.LastName = values[1];
contact.Phone = values[2];
contact.Color = GoogleColors.GetRandomColor();
App.Database.SaveContact(contact);
}
else
{
await App.Current.MainPage.DisplayAlert("Invalid QR Code Scanned", "Couldn't load contact data from scanned QR Code", "OK");
}
await App.Current.MainPage.Navigation.PopAsync();
});
};
await App.Current.MainPage.Navigation.PushAsync(ScannerPage);
}
public ContactEditPageViewModel(Contact contact)
{
this.Contact = contact ?? new Contact();
this.ViewTitle = contact == null ? "New Contact" : "Edit Contact";
this.CreateContactCommand = new Command(async() =>
{
if (await Validate())
{
if (this.Contact.Id != 0)
{
App.Database.UpdateContact(this.Contact);
}
else
{
this.Contact.Color = GoogleColors.GetRandomColor();
App.Database.SaveContact(this.Contact);
}
await App.Current.MainPage.Navigation.PopAsync();
}
});
this.PickPhotoCommand = new Command(async() =>
{
await CrossMedia.Current.Initialize();
if (!CrossMedia.Current.IsPickPhotoSupported)
{
await App.Current.MainPage.DisplayAlert("No Camera", ":( No camera available.", "OK");
return;
}
var file = await CrossMedia.Current.PickPhotoAsync(new Plugin.Media.Abstractions.PickMediaOptions
{
PhotoSize = Plugin.Media.Abstractions.PhotoSize.Small
});
if (file == null)
{
return;
}
using (var memoryStream = new MemoryStream())
{
file.GetStream().CopyTo(memoryStream);
this.Contact.Image = memoryStream.ToArray();
}
});
this.GoBackCommand = new Command(async() =>
{
await App.Current.MainPage.Navigation.PopAsync();
});
}
