Google account Integration in Android – Login with Gmail

Hello Friends,

This is my post for Google account integration with your application,  login with gmail, signup with Google account. Some important step is given below-

• Step 1- Create new project say GoogleProfileDemo.
• Step 2- Add “Google play service” libray project.
• Step 3 – Add needed permission in manifest.xml-

<uses-permission android:name="android.permission.INTERNET" />

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

<uses-permission android:name="android.permission.GET_ACCOUNTS" />

<uses-permission android:name="android.permission.NETWORK" />

<uses-permission android:name="android.permission.USE_CREDENTIALS" />

1)SplashActivity.java

package com.manish.google.profile;

import android.accounts.Account;
import android.accounts.AccountManager;
import android.app.Activity;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.os.Bundle;
import android.util.Log;
import android.widget.Toast;

import com.google.android.gms.auth.GoogleAuthUtil;

/**
 * @author manish
 * 
 */
public class SplashActivity extends Activity {
	Context mContext = SplashActivity.this;
	AccountManager mAccountManager;
	String token;
	int serverCode;
	private static final String SCOPE = "oauth2:https://www.googleapis.com/auth/userinfo.profile";

	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		// Splash screen view
		setContentView(R.layout.activity_splash);
			syncGoogleAccount();

	}

	private String[] getAccountNames() {
		mAccountManager = AccountManager.get(this);
		Account[] accounts = mAccountManager
				.getAccountsByType(GoogleAuthUtil.GOOGLE_ACCOUNT_TYPE);
		String[] names = new String[accounts.length];
		for (int i = 0; i < names.length; i++) {
			names[i] = accounts[i].name;
		}
		return names;
	}

	private AbstractGetNameTask getTask(SplashActivity activity, String email,
			String scope) {
		return new GetNameInForeground(activity, email, scope);

	}

	public void syncGoogleAccount() {
		if (isNetworkAvailable() == true) {
			String[] accountarrs = getAccountNames();
			if (accountarrs.length > 0) {
				//you can set here account for login
				getTask(SplashActivity.this, accountarrs[0], SCOPE).execute();
			} else {
				Toast.makeText(SplashActivity.this, "No Google Account Sync!",
						Toast.LENGTH_SHORT).show();
			}
		} else {
			Toast.makeText(SplashActivity.this, "No Network Service!",
					Toast.LENGTH_SHORT).show();
		}
	}
	public boolean isNetworkAvailable() {

		ConnectivityManager cm = (ConnectivityManager) mContext
				.getSystemService(Context.CONNECTIVITY_SERVICE);
		NetworkInfo networkInfo = cm.getActiveNetworkInfo();
		if (networkInfo != null && networkInfo.isConnected()) {
			Log.e("Network Testing", "***Available***");
			return true;
		}
		Log.e("Network Testing", "***Not Available***");
		return false;
	}
}

2)HomeActivity.java

package com.manish.google.profile;

import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;

import org.json.JSONException;
import org.json.JSONObject;

import android.app.Activity;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.widget.ImageView;
import android.widget.TextView;

/**
 * @author manish
 * 
 */
public class HomeActivity extends Activity {
	ImageView imageProfile;
	TextView textViewName, textViewEmail, textViewGender, textViewBirthday;
	String textName, textEmail, textGender, textBirthday, userImageUrl;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_home);
		imageProfile = (ImageView) findViewById(R.id.imageView1);
		textViewName = (TextView) findViewById(R.id.textViewNameValue);
		textViewEmail = (TextView) findViewById(R.id.textViewEmailValue);
		textViewGender = (TextView) findViewById(R.id.textViewGenderValue);
		textViewBirthday = (TextView) findViewById(R.id.textViewBirthdayValue);

		/**
		 * get user email using intent
		 */

		Intent intent = getIntent();
		textEmail = intent.getStringExtra("email_id");
		System.out.println(textEmail);
		textViewEmail.setText(textEmail);

		/**
		 * get user data from google account
		 */

		try {
			System.out.println("On Home Page***"
					+ AbstractGetNameTask.GOOGLE_USER_DATA);
			JSONObject profileData = new JSONObject(
					AbstractGetNameTask.GOOGLE_USER_DATA);

			if (profileData.has("picture")) {
				userImageUrl = profileData.getString("picture");
				new GetImageFromUrl().execute(userImageUrl);
			}
			if (profileData.has("name")) {
				textName = profileData.getString("name");
				textViewName.setText(textName);
			}
			if (profileData.has("gender")) {
				textGender = profileData.getString("gender");
				textViewGender.setText(textGender);
			}
			if (profileData.has("birthday")) {
				textBirthday = profileData.getString("birthday");
				textViewBirthday.setText(textBirthday);
			}

		} catch (JSONException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	public class GetImageFromUrl extends AsyncTask<String, Void, Bitmap> {
		@Override
		protected Bitmap doInBackground(String... urls) {
			Bitmap map = null;
			for (String url : urls) {
				map = downloadImage(url);
			}
			return map;
		}

		// Sets the Bitmap returned by doInBackground
		@Override
		protected void onPostExecute(Bitmap result) {
			imageProfile.setImageBitmap(result);
		}

		// Creates Bitmap from InputStream and returns it
		private Bitmap downloadImage(String url) {
			Bitmap bitmap = null;
			InputStream stream = null;
			BitmapFactory.Options bmOptions = new BitmapFactory.Options();
			bmOptions.inSampleSize = 1;

			try {
				stream = getHttpConnection(url);
				bitmap = BitmapFactory.decodeStream(stream, null, bmOptions);
				stream.close();
			} catch (IOException e1) {
				e1.printStackTrace();
			}
			return bitmap;
		}

		// Makes HttpURLConnection and returns InputStream
		private InputStream getHttpConnection(String urlString)
				throws IOException {
			InputStream stream = null;
			URL url = new URL(urlString);
			URLConnection connection = url.openConnection();

			try {
				HttpURLConnection httpConnection = (HttpURLConnection) connection;
				httpConnection.setRequestMethod("GET");
				httpConnection.connect();

				if (httpConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
					stream = httpConnection.getInputStream();
				}
			} catch (Exception ex) {
				ex.printStackTrace();
			}
			return stream;
		}
	}
}

3)AbstractGetNameTask.java

/**
 * Copyright 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.manish.google.profile;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;

import org.json.JSONException;

import com.google.android.gms.auth.GoogleAuthUtil;

import android.content.Intent;
import android.os.AsyncTask;
import android.util.Log;
import android.widget.Toast;

/**
 * Display personalized greeting. This class contains boilerplate code to
 * consume the token but isn't integral to getting the tokens.
 */
public abstract class AbstractGetNameTask extends AsyncTask<Void, Void, Void> {
	private static final String TAG = "TokenInfoTask";
	protected SplashActivity mActivity;
   public static String GOOGLE_USER_DATA="No_data";
	protected String mScope;
	protected String mEmail;
	protected int mRequestCode;

	AbstractGetNameTask(SplashActivity activity, String email, String scope) {
		this.mActivity = activity;
		this.mScope = scope;
		this.mEmail = email;
	}

	@Override
	protected Void doInBackground(Void... params) {
		try {
			fetchNameFromProfileServer();

		} catch (IOException ex) {
			onError("Following Error occured, please try again. "
					+ ex.getMessage(), ex);
		} catch (JSONException e) {
			onError("Bad response: " + e.getMessage(), e);
		}
		return null;
	}

	protected void onError(String msg, Exception e) {
		if (e != null) {
			Log.e(TAG, "Exception: ", e);
		}
	}

	/**
	 * Get a authentication token if one is not available. If the error is not
	 * recoverable then it displays the error message on parent activity.
	 */
	protected abstract String fetchToken() throws IOException;

	/**
	 * Contacts the user info server to get the profile of the user and extracts
	 * the first name of the user from the profile. In order to authenticate
	 * with the user info server the method first fetches an access token from
	 * Google Play services.
	 * @return 
	 * @return 
	 * 
	 * @throws IOException
	 *             if communication with user info server failed.
	 * @throws JSONException
	 *             if the response from the server could not be parsed.
	 */
	private void fetchNameFromProfileServer() throws IOException, JSONException {
		String token = fetchToken();
		URL url = new URL("https://www.googleapis.com/oauth2/v1/userinfo?access_token="+ token);
		HttpURLConnection con = (HttpURLConnection) url.openConnection();
		int sc = con.getResponseCode();
		if (sc == 200) {
			InputStream is = con.getInputStream();
			GOOGLE_USER_DATA = readResponse(is);
			is.close();

			Intent intent=new Intent(mActivity,HomeActivity.class);
			intent.putExtra("email_id", mEmail);
			mActivity.startActivity(intent);
			mActivity.finish();
			return;
		} else if (sc == 401) {
			GoogleAuthUtil.invalidateToken(mActivity, token);
			onError("Server auth error, please try again.", null);
			//Toast.makeText(mActivity, "Please try again", Toast.LENGTH_SHORT).show();
			//mActivity.finish();
			return;
		} else {
			onError("Server returned the following error code: " + sc, null);
			return;
		}
	}

	/**
	 * Reads the response from the input stream and returns it as a string.
	 */
	private static String readResponse(InputStream is) throws IOException {
		ByteArrayOutputStream bos = new ByteArrayOutputStream();
		byte[] data = new byte[2048];
		int len = 0;
		while ((len = is.read(data, 0, data.length)) >= 0) {
			bos.write(data, 0, len);
		}
		return new String(bos.toByteArray(), "UTF-8");
	}

}

4)GetNameInForeground.java

/**
 * Copyright 2012 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.manish.google.profile;

import java.io.IOException;

import com.google.android.gms.auth.GoogleAuthException;
import com.google.android.gms.auth.GoogleAuthUtil;
import com.google.android.gms.auth.GooglePlayServicesAvailabilityException;
import com.google.android.gms.auth.UserRecoverableAuthException;

/**
 * This example shows how to fetch tokens if you are creating a foreground task/activity and handle
 * auth exceptions.
 */
public class GetNameInForeground extends AbstractGetNameTask {

  public GetNameInForeground(SplashActivity activity, String email, String scope) {
      super(activity, email, scope);
  }

  /**
   * Get a authentication token if one is not available. If the error is not recoverable then
   * it displays the error message on parent activity right away.
   */
  @Override
  protected String fetchToken() throws IOException {
      try {
          return GoogleAuthUtil.getToken(mActivity, mEmail, mScope);
      } catch (GooglePlayServicesAvailabilityException playEx) {
          // GooglePlayServices.apk is either old, disabled, or not present.
      } catch (UserRecoverableAuthException userRecoverableException) {
          // Unable to authenticate, but the user can fix this.
          // Forward the user to the appropriate activity.
          mActivity.startActivityForResult(userRecoverableException.getIntent(), mRequestCode);
      } catch (GoogleAuthException fatalException) {
          onError("Unrecoverable error " + fatalException.getMessage(), fatalException);
      }
      return null;
  }
}

5)activity_splash.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".SplashActivity" >

    <TextView
        android:id="@+id/textView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_centerHorizontal="true"
        android:layout_centerVertical="true"
        android:text="Please wait..."
        android:textSize="25sp" />

    <ProgressBar
        android:id="@+id/progressBar1"
        style="?android:attr/progressBarStyleLarge"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textView1"
        android:layout_centerHorizontal="true" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_marginBottom="10dp"
        android:text="By:Manish Srivastava" />

</RelativeLayout>

6)activity_home.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_margin="7dp" >

    <TextView
        android:id="@+id/textViewTitle"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:layout_centerHorizontal="true"
        android:text="Home Page"
        android:textSize="24sp" />

    <TextView
        android:id="@+id/textViewNameLabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@+id/textViewTitle"
        android:layout_marginTop="15dp"
        android:text="Name:"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/textViewNameValue"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@+id/textViewTitle"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="15dp"
        android:layout_toRightOf="@id/textViewNameLabel"
        android:text="Name:"
        android:textSize="18sp" />

      <TextView
        android:id="@+id/textViewEmailLabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@id/textViewNameLabel"
        android:layout_marginTop="15dp"
        android:text="Email:"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/textViewEmailValue"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_below="@id/textViewNameValue"
        android:layout_marginLeft="10dp"
        android:layout_marginTop="15dp"
        android:layout_toRightOf="@id/textViewEmailLabel"
        android:text="Email:"
        android:textSize="18sp" />

     <TextView
        android:id="@+id/textViewGenderLabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@id/textViewEmailLabel"
        android:layout_marginTop="15dp"
        android:text="Gender:"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/textViewGenderValue"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBottom="@+id/textViewGenderLabel"
        android:layout_alignLeft="@+id/textViewNameValue"
        android:text="Gender:"
        android:textSize="18sp" />

     <TextView
        android:id="@+id/textViewBirthdayLabel"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentLeft="true"
        android:layout_below="@id/textViewGenderLabel"
        android:layout_marginTop="15dp"
        android:text="Birthday:"
        android:textSize="18sp" />

    <TextView
        android:id="@+id/textViewBirthdayValue"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignBaseline="@+id/textViewBirthdayLabel"
        android:layout_alignBottom="@+id/textViewBirthdayLabel"
        android:layout_toRightOf="@+id/textViewBirthdayLabel"
        android:text="Birthday:"
        android:textSize="18sp" />

    <ImageView
        android:id="@+id/imageView1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentRight="true"
        android:layout_toRightOf="@+id/textViewTitle"/>

</RelativeLayout>

7)AndroidManifest.xml

<manifest android:versioncode="1" android:versionname="1.0" package="com.manish.google.profile" xmlns:android="http://schemas.android.com/apk/res/android">

    <uses-sdk android:minsdkversion="8" android:targetsdkversion="16">

    <uses-permission android:name="android.permission.INTERNET">
    <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE">
    <uses-permission android:name="android.permission.GET_ACCOUNTS">
    <uses-permission android:name="android.permission.NETWORK">
    <uses-permission android:name="android.permission.USE_CREDENTIALS">

    <application android:allowbackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme">
        <activity android:label="@string/app_name" android:name="com.manish.google.profile.SplashActivity">
            <intent-filter>
                <action android:name="android.intent.action.MAIN">

                <category android:name="android.intent.category.LAUNCHER">
            </category></action></intent-filter>
        </activity>
        <activity android:name="com.manish.google.profile.HomeActivity">
    </activity></application>

</uses-permission></uses-permission></uses-permission></uses-permission></uses-permission></uses-sdk></manifest>

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