Apps Sign In with Google

[HackerNam]

Step 1: Install Google Play Services

Step 2: Google Plus Intergration
https://developers.google.com/identity/sign-in/android/start-integrating#add-config

Step 3: Add file build.gradle

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.google-services'
    ...
dependencies {
    compile 'com.google.android.gms:play-services:8.3.0'
}

Step 4: Add file file manifest.xml

<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.GET_ACCOUNTS" />
<uses-permission android:name="android.permission.USE_CREDENTIALS" />
   
<meta-data
android:name="com.google.android.gms.version"
android:value="@integer/google_play_services_version" />

Step 5: Create Google Api Client to use Google+ API

private void buidNewGoogleApiClient()
{
            google_api_client =  new GoogleApiClient.Builder(this)
               .addConnectionCallbacks(this)
               .addOnConnectionFailedListener(this)
               .addApi(Plus.API,Plus.PlusOptions.builder().build())
               .addScope(Plus.SCOPE_PLUS_LOGIN)
               .build();
}

Step 6: Sign into your Google account +

private void gPlusSignIn() {
       if (!google_api_client.isConnecting()) {
           Log.d("user connected","connected");
           is_signInBtn_clicked = true;
           progress_dialog.show();
           resolveSignInError();
       }
   }

Step 7: Get user information

public void onConnected(Bundle arg0) {
        is_signInBtn_clicked = false;
        getProfileInfo();
        changeUI(true);
    }

private void getProfileInfo() {
        try {
            if (Plus.PeopleApi.getCurrentPerson(google_api_client) != null) {
               Person currentPerson = Plus.PeopleApi.getCurrentPerson(google_api_client);
                setPersonalInfo(currentPerson);
            } else {
                Toast.makeText(getApplicationContext(),
                        "No Personal info mention", Toast.LENGTH_LONG).show();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

Step 8: Display user information

private void setPersonalInfo(Person currentPerson)
{
    String personName = currentPerson.getDisplayName();
    String personPhotoUrl = currentPerson.getImage().getUrl();
    String email = Plus.AccountApi.getAccountName(google_api_client);
    TextView   user_name = (TextView) findViewById(R.id.userName);
    user_name.setText("Name: "+personName);
    TextView gemail_id = (TextView)findViewById(R.id.emailId);
    gemail_id.setText("Email Id: " +email);
    setProfilePic(personPhotoUrl);
    progress_dialog.dismiss();
    Toast.makeText(this, "Person information is shown!", Toast.LENGTH_LONG).show();
}

Full source code:
https://drive.google.com/file/d/0B7V9D29Tek7yU2I4dTc5b2FseVk/view?usp=sharinghttps://drive.google.com/file/d/0B7V9D29Tek7yU2I4dTc5b2FseVk/view?usp=sharing

 

[HeavensSentSword]

What is you issue now?
But fyi you have to put
apply plugin: 'com.google.ms.google-services'
below your dependancies not near the other apply plugin. Other wise it won't work. (First had experience)