Android Open Source - Google-Authentication-in-Android Main Activity

• Back to App/authentication  ↑

From Project

Back to project page Google-Authentication-in-Android.

License

The source code is released under:

Apache License

Java Source Code

package com.googleplusapi;
/*from  w w  w  . ja  v  a  2 s.c o m*/
/*
 * Siddhartha Dimania
 * 
 * Add the google play services as a library in the project.......................
 * 
 * Click File > Import, select Android > Existing Android Code into Workspace, 
 * and browse the workspace import the library project. You can check if it is 
 * library project. Right click on the library project. Goto properties. Click
 * Android on the left panel. You will see Is Library checked.
 */


import java.io.InputStream;

import android.app.Activity;
import android.content.Intent;
import android.content.IntentSender.SendIntentException;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.googleplusapi.R;
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.common.api.GoogleApiClient.ConnectionCallbacks;
import com.google.android.gms.common.api.GoogleApiClient.OnConnectionFailedListener;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.common.api.Status;
import com.google.android.gms.plus.Plus;
import com.google.android.gms.plus.model.people.Person;

public class MainActivity extends Activity implements OnClickListener,
    ConnectionCallbacks, OnConnectionFailedListener {

  private static final int RC_SIGN_IN = 0;
  // Logcat tag
  private static final String TAG = "MainActivity";

  // Profile pic image size in pixels
  private static final int PROFILE_PIC_SIZE = 400;

  
  
  // Google client to interact with Google API
  private GoogleApiClient mGoogleApiClient;

  /**
   * A flag indicating that a PendingIntent is in progress and prevents us
   * from starting further intents.
   */
  private boolean mIntentInProgress;

  private boolean mSignInClicked;

  private ConnectionResult mConnectionResult;

  private SignInButton btnSignIn;
  private Button btnSignOut, btnRevokeAccess;
  private ImageView imgProfilePic;
  private TextView txtName, txtEmail;
  private LinearLayout llProfileLayout;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    btnSignIn = (SignInButton) findViewById(R.id.btn_sign_in);
    btnSignOut = (Button) findViewById(R.id.btn_sign_out);
    btnRevokeAccess = (Button) findViewById(R.id.btn_revoke_access);
    imgProfilePic = (ImageView) findViewById(R.id.imgProfilePic);
    txtName = (TextView) findViewById(R.id.txtName);
    txtEmail = (TextView) findViewById(R.id.txtEmail);
    llProfileLayout = (LinearLayout) findViewById(R.id.llProfile);

    // Button click listeners
    btnSignIn.setOnClickListener(this);
    btnSignOut.setOnClickListener(this);
    btnRevokeAccess.setOnClickListener(this);

    mGoogleApiClient = new GoogleApiClient.Builder(this)
      .addConnectionCallbacks(this)
          .addOnConnectionFailedListener(this)
          .addApi(Plus.API, Plus.PlusOptions.builder().build())
          .addScope(Plus.SCOPE_PLUS_LOGIN)
          .build();
  }

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

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

  /**
   * Method to resolve any signin errors
   * */
  private void resolveSignInError() {
    if (mConnectionResult.hasResolution()) {
      try {
        mIntentInProgress = true;
        mConnectionResult.startResolutionForResult(this, RC_SIGN_IN);
      } catch (SendIntentException e) {
        mIntentInProgress = false;
        mGoogleApiClient.connect();
      }
    }
  }

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

    if (!mIntentInProgress) {
      // Store the ConnectionResult for later usage
      mConnectionResult = result;

      if (mSignInClicked) {
        // 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 == RC_SIGN_IN) {
      if (responseCode != RESULT_OK) {
        mSignInClicked = false;
      }

      mIntentInProgress = false;

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

  @Override
  public void onConnected(Bundle arg0) {
    mSignInClicked = false;
    Toast.makeText(this, "User is connected!", Toast.LENGTH_LONG).show();

    // Get user's information
    getProfileInformation();

    // Update the UI after signin
    updateUI(true);

  }

  /**
   * Updating the UI, showing/hiding buttons and profile layout
   * */
  private void updateUI(boolean isSignedIn) {
    if (isSignedIn) {
      btnSignIn.setVisibility(View.GONE);
      btnSignOut.setVisibility(View.VISIBLE);
      btnRevokeAccess.setVisibility(View.VISIBLE);
      llProfileLayout.setVisibility(View.VISIBLE);
    } else {
      btnSignIn.setVisibility(View.VISIBLE);
      btnSignOut.setVisibility(View.GONE);
      btnRevokeAccess.setVisibility(View.GONE);
      llProfileLayout.setVisibility(View.GONE);
    }
  }

  /**
   * Fetching user's information name, email, profile pic
   * */
  private void getProfileInformation() {
    try {
      if (Plus.PeopleApi.getCurrentPerson(mGoogleApiClient) != null) {
        Person currentPerson = Plus.PeopleApi
            .getCurrentPerson(mGoogleApiClient);
        String personName = currentPerson.getDisplayName();
        String personPhotoUrl = currentPerson.getImage().getUrl();
        String personGooglePlusProfile = currentPerson.getUrl();
        String email = Plus.AccountApi.getAccountName(mGoogleApiClient);

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

        txtName.setText(personName);
        txtEmail.setText(email);

        // by default the profile url gives 50x50 px image only
        // we can replace the value with whatever dimension we want by
        // replacing sz=X
        personPhotoUrl = personPhotoUrl.substring(0,
            personPhotoUrl.length() - 2)
            + PROFILE_PIC_SIZE;

        new LoadProfileImage(imgProfilePic).execute(personPhotoUrl);

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

  @Override
  public void onConnectionSuspended(int arg0) {
    mGoogleApiClient.connect();
    updateUI(false);
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }

  /**
   * Button on click listener
   * */
  @Override
  public void onClick(View v) {
    switch (v.getId()) {
    case R.id.btn_sign_in:
      // Signin button clicked
      signInWithGplus();
      break;
    case R.id.btn_sign_out:
      // Signout button clicked
      signOutFromGplus();
      break;
    case R.id.btn_revoke_access:
      // Revoke access button clicked
      revokeGplusAccess();
      break;
    }
  }

  /**
   * Sign-in into google
   * */
  private void signInWithGplus() {
    if (!mGoogleApiClient.isConnecting()) {
      mSignInClicked = true;
      resolveSignInError();
    }
  }

  private GoogleApiClient buildGoogleApiClient() {
      // When we build the GoogleApiClient we specify where connected and
      // connection failed callbacks should be returned, which Google APIs our
      // app uses and which OAuth 2.0 scopes our app requests.
      return new GoogleApiClient.Builder(this)
          .addConnectionCallbacks(this)
          .addOnConnectionFailedListener(this)
          .addApi(Plus.API, Plus.PlusOptions.builder().build())
          .addScope(Plus.SCOPE_PLUS_LOGIN)
          .build();
    }
  /**
   * Sign-out from google
   * */
  private void signOutFromGplus() {
    if (mGoogleApiClient.isConnected()) {
      Plus.AccountApi.clearDefaultAccount(mGoogleApiClient);
      mGoogleApiClient.disconnect();
      mGoogleApiClient.connect();
      updateUI(false);
    }
  }

  /**
   * Revoking access from google
   * */
  private void revokeGplusAccess() {
    if (mGoogleApiClient.isConnected()) {
         Plus.AccountApi.clearDefaultAccount(mGoogleApiClient);
              Plus.AccountApi.revokeAccessAndDisconnect(mGoogleApiClient);
              mGoogleApiClient = buildGoogleApiClient();
              mGoogleApiClient.connect();
              updateUI(false);
    }
  }

  /**
   * Background Async task to load user profile picture from url
   * */
  private class LoadProfileImage extends AsyncTask<String, Void, Bitmap> {
    ImageView bmImage;

    public LoadProfileImage(ImageView bmImage) {
      this.bmImage = bmImage;
    }

    protected Bitmap doInBackground(String... urls) {
      String urldisplay = urls[0];
      Bitmap mIcon11 = null;
      try {
        InputStream in = new java.net.URL(urldisplay).openStream();
        mIcon11 = BitmapFactory.decodeStream(in);
      } catch (Exception e) {
        Log.e("Error", e.getMessage());
        e.printStackTrace();
      }
      return mIcon11;
    }

    protected void onPostExecute(Bitmap result) {
      bmImage.setImageBitmap(result);
    }
  }

}

Java Source Code List

• Back to App/authentication  ↑