Login

package com.appdev.ngoapp;

import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.content.IntentSender;
import android.os.Bundle;
import android.view.View;

import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.common.SignInButton;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.plus.Plus;

/**
 * Created by Adarsh on 01-02-2015.
 */
public class LoginActivity extends Activity implements GoogleApiClient.ConnectionCallbacks, GoogleApiClient.OnConnectionFailedListener {

    private GoogleApiClient googleApiClient;
    boolean intentInProgress;
    boolean signInClicked;
    private ConnectionResult connectionResult;
    private SignInButton signInButton;
    private ProgressDialog progressDialog;
    boolean dialogFlag=false;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.login_layout);
        signInButton = (SignInButton) findViewById(R.id.signin);
        signInButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                progressDialog = ProgressDialog.show(LoginActivity.this, "Please Wait", "Logging In", true);
                progressDialog.setCancelable(false);
                dialogFlag=true;
                signInWithGplus();
            }
        });

        googleApiClient = new GoogleApiClient.Builder(this).addConnectionCallbacks(this).addOnConnectionFailedListener(this).addApi(Plus.API).addScope(Plus.SCOPE_PLUS_LOGIN).build();
    }


    protected void onStart() {
        super.onStart();
        googleApiClient.connect();
    }


    protected void onStop() {
        super.onStop();
        if(googleApiClient.isConnected()) {
            googleApiClient.disconnect();
        }
    }

    @Override
    public void onConnectionFailed(ConnectionResult result) {
        if (!result.hasResolution()) {
            GooglePlayServicesUtil.getErrorDialog(result.getErrorCode(), this,
                    0).show();
            return;
        }

        if (!intentInProgress) {
            // Store the ConnectionResult for later usage
            connectionResult = result;

            if (signInClicked) {
                // The user has already clicked 'sign-in' so we attempt to
                // resolve all
                // errors until the user is signed in, or they cancel.
                resolveSignInError();
            }
        }
    }

    @Override
    protected void onActivityResult(int requestCode, int responseCode, Intent intent) {
        if (requestCode == 0) {
            if (responseCode != RESULT_OK) {
                signInClicked = false;
            }

            intentInProgress = false;

            if (!googleApiClient.isConnecting()) {
                googleApiClient.connect();
            }
        }
    }

    @Override
    public void onConnected(Bundle arg0) {
        if(dialogFlag) {
            progressDialog.dismiss();
        }
        signInClicked = false;
        String email = Plus.AccountApi.getAccountName(googleApiClient);
        Intent mainActivity =  new Intent(this,MainActivity.class);
        mainActivity.putExtra("email",email);
        mainActivity.putExtra("code",1);
        startActivity(mainActivity);
    }

    @Override
    public void onConnectionSuspended(int arg0) {

        googleApiClient.connect();
    }

    private void signInWithGplus() {
        if (!googleApiClient.isConnecting()) {
            signInClicked = true;
            resolveSignInError();
        }
    }

    private void resolveSignInError() {
        if (connectionResult.hasResolution()) {
            try {
                intentInProgress = true;
                connectionResult.startResolutionForResult(this, 0);
            } catch (IntentSender.SendIntentException e) {
                intentInProgress = false;
                googleApiClient.connect();
            }
        }
    }
}