Xamarin Android Google Plus SignIn - xamarin

Question

I learning Xamarin Android, and i want to implement Google SignIn... But i'm not to be able to do that. I just need to use Client ID? i catch some examples in Internet but nothing works... Can someone give a example? or step by step how i can do this in Xamarin?
Thank you!
My Code:
using Android.App;
using Android.Widget;
using Android.OS;
using Android.Gms.Common.Apis;
using Android.Gms.Common;
using System;
using Android.Gms.Plus;
using Android.Content;
using Android.Runtime;
using Android.Gms.Plus.Model.People;
namespace LoginGoogle
{
[Activity(Label = "LoginGoogle", MainLauncher = true, Icon = "#drawable/icon")]
public class MainActivity : Activity, GoogleApiClient.IConnectionCallbacks,
GoogleApiClient.IOnConnectionFailedListener
{
private GoogleApiClient googleApiClient;
private SignInButton btnGooglePlus;
private ConnectionResult connectionResult;
private bool intentProgress;
private bool signInClick;
private bool infoPopulated;
private TextView lblName;
private TextView lblTagLine;
private TextView lblBraggingRights;
private TextView lblGender;
private TextView lblRelationship;
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView (Resource.Layout.Main);
btnGooglePlus = FindViewById<SignInButton>(Resource.Id.btnGooglePlus);
btnGooglePlus.Click += btnGooglePlus_Click;
lblName = FindViewById<TextView>(Resource.Id.lblName);
lblTagLine = FindViewById<TextView>(Resource.Id.lblTagLine);
lblBraggingRights = FindViewById<TextView>(Resource.Id.lblBraggingRights);
lblGender = FindViewById<TextView>(Resource.Id.lblGender);
lblRelationship = FindViewById<TextView>(Resource.Id.lblRelationship);
GoogleApiClient.Builder builder = new GoogleApiClient.Builder(this);
builder.AddConnectionCallbacks(this);
builder.AddOnConnectionFailedListener(this);
builder.AddApi(PlusClass.API);
builder.AddScope(PlusClass.ScopePlusProfile);
builder.AddScope(PlusClass.ScopePlusLogin);
//Build our GoogleApiClient
googleApiClient = builder.Build();
}
void btnGooglePlus_Click(object sender, EventArgs e)
{
if (!googleApiClient.IsConnecting)
{
signInClick = true;
resolveSigInError();
}
}
private void resolveSigInError()
{
if (!googleApiClient.IsConnected)
{
//No need to resolve errors
return;
}
if (connectionResult.HasResolution)
{
try
{
intentProgress = true;
StartIntentSenderForResult(connectionResult.Resolution.IntentSender, 0, null,
0, 0, 0);
} catch (Android.Content.IntentSender.SendIntentException e)
{
intentProgress = false;
googleApiClient.Connect();
}
}
}
protected override void OnActivityResult(int requestCode,
[GeneratedEnum] Result resultCode, Intent data)
{
if(requestCode == 0)
{
if(resultCode != Result.Ok)
{
signInClick = false;
}
intentProgress = false;
if (googleApiClient.IsConnecting)
{
googleApiClient.Connect();
}
}
}
protected override void OnStart()
{
base.OnStart();
googleApiClient.Connect();
}
protected override void OnStop()
{
base.OnStop();
if (googleApiClient.IsConnected)
{
googleApiClient.Disconnect();
}
}
public void OnConnected(Bundle connectionHint)
{
//Successful login
signInClick = false;
if (PlusClass.PeopleApi.GetCurrentPerson(googleApiClient) != null)
{
IPerson plusUser = PlusClass.PeopleApi.GetCurrentPerson(googleApiClient);
if (plusUser.HasDisplayName)
{
lblName.Text += plusUser.DisplayName;
}
if (plusUser.HasTagline)
{
lblTagLine.Text += plusUser.Tagline;
}
if (plusUser.HasBraggingRights)
{
lblBraggingRights.Text += plusUser.BraggingRights;
}
{
switch (plusUser.RelationshipStatus)
{
case 0:
lblRelationship.Text += "Single";
break;
case 1:
lblRelationship.Text += "In a relationship";
break;
case 2:
lblRelationship.Text += "Engaged";
break;
case 3:
lblRelationship.Text += "Married";
break;
case 4:
lblRelationship.Text += "It's complicated";
break;
case 5:
lblRelationship.Text += "In an open relationship";
break;
case 6:
lblRelationship.Text += "Widowed";
break;
case 7:
lblRelationship.Text += "In a domestic partnership";
break;
case 8:
lblRelationship.Text += "In a civil union";
break;
default:
lblRelationship.Text += "Unknown";
break;
}
}
if (plusUser.HasGender)
{
switch (plusUser.Gender)
{
case 0:
lblGender.Text += "Male";
break;
case 1:
lblGender.Text += "Female";
break;
case 2:
lblGender.Text += "Other";
break;
default:
lblGender.Text += "Unknown";
break;
}
infoPopulated = true;
}
}
}
public void OnConnectionSuspended(int cause)
{
throw new NotImplementedException();
}
public void OnConnectionFailed(ConnectionResult result)
{
if (intentProgress)
{
//Store the ConnectionResult so that we can use it later when the user
//clicks 'sign in'
connectionResult = result;
if (signInClick)
{
//The user has already clicked 'signin' so we attempt to resolve all
//errors until the user is signed in
resolveSigInError();
}
}
}
}
}
enter code here

Answer 1

Please refer to the xamarin sample for google sign in. In this sample you do not need Client ID. For more google sign in information please check the google development document.
I catch some examples in Internet but nothing works...
I think you may not authorized the app.
Download the sample and make sure you've authorized the app in the Google Developers Console before use.
Authorized the app
Open the link.
Create your project name(whatever you write) and add the package name for it. In this sample the package name is com.xamarin.signinquickstart.
Get your SHA-1 please refer to this link.
Build and deploy the demo app and sign in with google account.
Screen shot:
But i'm not to be able to do that. I just need to use Client ID?
How to use the Client ID login on
According to google document. I think you can try to login with client id by:
GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DefaultSignIn)
.RequestIdToken("YOUR_CLIENT_ID")
.RequestEmail()
.Build();
mGoogleApiClient = new GoogleApiClient.Builder (this)
.EnableAutoManage(mLoginFragment, failedHandler)
.AddApi (Auth.GOOGLE_SIGN_IN_API,gso)
.Build ()