Example Login with google and getting profile data Android

Step 1:
use in app gradle-

compile 'com.google.android.gms:play-services-plus:8.4.0'

Step 2:

Entry in AndroidManifest

<meta-data    android:name="com.google.android.geo.API_KEY"    
android:value="AIzaSyDLJ4gqadVVrjTLM1x-RfsCU_QQ_olY-N0" />

and past the google-services.json in app 

Step 3:
And open Activity where you want to implemet and 
just implemet GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,View.OnClickListener 

Data members .......
private GoogleApiClient mGoogleApiClient;
private ConnectionResult mConnectionResult;
private static final int RC_SIGN_IN = 0;


private void signInWithGplus() {

    if (!mGoogleApiClient.isConnecting()) {
        mSignInClicked = true;
        mGoogleApiClient.connect();

        Log.e("", " isConnected is :: " + isConnected);
        if (isConnected == false) {
            resolveSignInError();
            updateUI(true);
        } else if (isConnected == true) {
            getProfileInformation();
          
            updateUI(true);
        }
    } else {

        //  Toast.makeText(this, "User is not connected!", Toast.LENGTH_LONG).show();    }

}

private void resolveSignInError() {
    if (mConnectionResult.hasResolution()) {
        try {
            mIntentInProgress = true;
            mConnectionResult.startResolutionForResult(this, RC_SIGN_IN);
        } catch (IntentSender.SendIntentException e) {
            mIntentInProgress = false;
            mGoogleApiClient.connect();
        }
    }
}


private void updateUI(boolean isSignedIn) {
    if (isSignedIn) {
        // btnSignIn.setVisibility(View.GONE);       
 // authButton.setVisibility(View.GONE);        
// btnSignOut.setVisibility(View.VISIBLE);    
} else {
        // btnSignIn.setVisibility(View.VISIBLE);      
  // authButton.setVisibility(View.VISIBLE);       
 // btnSignOut.setVisibility(View.GONE);    }
}


public void signOutFromGplus() {
  if (mGoogleApiClient.isConnected()) {
        Plus.AccountApi.clearDefaultAccount(mGoogleApiClient);
        mGoogleApiClient.disconnect();
        //  mGoogleApiClient.connect();       
          isConnected = false;
    }
}

@SuppressWarnings("unused")
private void revokeGplusAccess() {
    if (mGoogleApiClient.isConnected()) {
        Plus.AccountApi.clearDefaultAccount(mGoogleApiClient);
        Plus.AccountApi.revokeAccessAndDisconnect(mGoogleApiClient).
setResultCallback(new ResultCallback<Status>() {
            @Override            public void onResult(Status arg0) {
                // Log.e(TAG, "User access revoked!");              
  mGoogleApiClient.connect();
                updateUI(false);
            }
        });
    }
}

public static String personPhotoUrl = null;

// Fetching user's information name,email , profile pic
  private void getProfileInformation() {
    try {
        Log.e("", " get profile information called..");
        if (Plus.PeopleApi.getCurrentPerson(mGoogleApiClient) != null) {
            Person currentPerson = Plus.PeopleApi.getCurrentPerson(mGoogleApiClient);

            String personName = currentPerson.getDisplayName();
            String dob = currentPerson.getBirthday();

            personPhotoUrl = currentPerson.getImage().getUrl();
            String acId=currentPerson.getId();
            sph.setString("PROFILEPIC", personPhotoUrl);
            sph.setBoolean("ISSOCIAL", true);
            String personGooglePlusProfile = currentPerson.getUrl();
            String email = Plus.AccountApi.getAccountName(mGoogleApiClient);
            int gender = currentPerson.getGender();
            Log.e("TaG", "Name: " + personName + ", plusProfile: " + 
personGooglePlusProfile + ", email: " + email + ", gender : " + gender);


            try {
                if (mSignInClicked) {
                    socialMeadiaType = 2;
                    loadingDialog.dismiss();
                 // Go for next Activity>............
               }
            } catch (Exception e) {
                Toast.makeText(this, "User Already Exist!", Toast.LENGTH_LONG).show();
                loadingDialog.dismiss();
            }

        } else {
            Toast.makeText(getApplicationContext(), "Person information is null", 
          Toast.LENGTH_LONG).show();
        }
    } catch (Exception e) {
        e.printStackTrace();
        loadingDialog.dismiss();
        // Tracking exception
    }
}

protected void onStart() {
    super.onStart();
    mGoogleApiClient.connect();
    //EasyTracker.getInstance(this).activityStart(this);}

protected void onStop() {
    super.onStop();
    if (mGoogleApiClient.isConnected()) {
        mGoogleApiClient.disconnect();
    }
    //EasyTracker.getInstance(this).activityStop(this);}


boolean isConnected = false;

boolean isFirstLogInGoogle = true;

@Overridepublic void onConnected(Bundle arg0) {
    // TODO Auto-generated method stub
    mSignInClicked = false;
    isConnected = true;
    // Toast.makeText(this, "User is connected!", Toast.LENGTH_LONG).show();
    updateUI(true);

    if (isFirstLogInGoogle == true) {

        isFirstLogInGoogle = false;

        getProfileInformation();
    }
}

@Overridepublic void onConnectionSuspended(int i) {
    mGoogleApiClient.connect();
    isConnected = false;
    updateUI(false);
}


public void googleLogin() {

    mGoogleApiClient = new GoogleApiClient.Builder(this)
            .addConnectionCallbacks(this)
            .addOnConnectionFailedListener(this)
            .addApi(Plus.API)
            .addScope(Plus.SCOPE_PLUS_LOGIN).build();
    if (sph.getBoolean("ISLOGIN", false) == false)
        signOutFromGplus();
}

@Overridepublic void onConnectionFailed(ConnectionResult result) {
    // TODO Auto-generated method stub    if (!result.hasResolution()) {

        return;
    }
    if (!mIntentInProgress) {
        mConnectionResult = result;
        if (mSignInClicked) {
            resolveSignInError();
        }
    }
}


@Overridepublic void onClick(View v) {
    int id=v.getId();

    switch (id)
    {
        case R.id.txtLoginWithGoogle:
            loadingDialog.show();
            signInWithGplus();
            break;

      
    }
}

@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);
 
}