How to integrate google+ sign in my android app?

Question

Hello all actually i need to sign in people from google+ through my app now i read documentation on google where it isstated that

To allow users to sign

Answer 1

This is the code


  public class MainActivity extends AppCompatActivity implements View.OnClickListener, GoogleApiClient.OnConnectionFailedListener { private static final String TAG = MainActivity.class.getSimpleName(); private static final int RC_SIGN_IN = 007; private GoogleApiClient mGoogleApiClient; private ProgressDialog mProgressDialog; private Button btnSignIn; private Button btnSignOut; private LinearLayout llProfileLayout; private ImageView imgProfilePic; private TextView txtName, txtEmail; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btnSignIn = (Button)findViewById(R.id.login); btnSignOut = (Button) findViewById(R.id.logout); imgProfilePic = (ImageView) findViewById(R.id.pic); txtName = (TextView) findViewById(R.id.name); txtEmail = (TextView) findViewById(R.id.email); btnSignIn.setOnClickListener(this); btnSignOut.setOnClickListener(this); GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN).requestEmail().build(); mGoogleApiClient = new GoogleApiClient.Builder(this).enableAutoManage(this, this).addApi(Auth.GOOGLE_SIGN_IN_API, gso).build(); } private void signIn() { Intent signInIntent = Auth.GoogleSignInApi.getSignInIntent(mGoogleApiClient); startActivityForResult(signInIntent, RC_SIGN_IN); } private void signOut() { Auth.GoogleSignInApi.signOut(mGoogleApiClient).setResultCallback(new ResultCallback() { @Override public void onResult(Status status) { updateUI(false); } }); } private void revokeAccess() { Auth.GoogleSignInApi.revokeAccess(mGoogleApiClient).setResultCallback(new ResultCallback() { @Override public void onResult(Status status) { updateUI(false); } }); } private void handleSignInResult(GoogleSignInResult result) { Log.d(TAG, "handleSignInResult:" + result.isSuccess()); if (result.isSuccess()) { /* Signed in successfully, show authenticated UI.*/ GoogleSignInAccount acct = result.getSignInAccount();
    Log.e(TAG, "display name: " + acct.getDisplayName());

    String personName = acct.getDisplayName();
    String personPhotoUrl = acct.getPhotoUrl().toString();
    String email = acct.getEmail();


    Log.e(TAG, "Name: " + personName + ", email: " + email
            + ", Image: " + personPhotoUrl);

    txtName.setText(personName);
    txtEmail.setText(email);
    ;
} else {

    updateUI(false);
}
}

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

        switch (id) {
            case R.id.login:
                signIn();
                break;

            case R.id.logout:
                signOut();
                break;

        }
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);

                if (requestCode == RC_SIGN_IN) {GoogleSignInResult result = Auth.GoogleSignInApi.getSignInResultFromIntent(data);
            Log.d(TAG, "onActivityResult: "+result);
            handleSignInResult(result);

        }
    }

    @Override
    public void onStart() {
        super.onStart();

        OptionalPendingResult opr = Auth.GoogleSignInApi.silentSignIn(mGoogleApiClient);
        if (opr.isDone()) {
        Log.d(TAG, "Got cached sign-in");
            GoogleSignInResult result = opr.get();

        }
    }

    @Override
    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {

        Log.d(TAG, "onConnectionFailed:" + connectionResult);
    }



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

        }
    }
}