Step 1: Login to google developers console and create new project inside it now after adding required info you need to enable google+ api under its section enable it.
Step 2. Now create new project in android studio. Open your project gradle we need to add dependencies in your build.gradle.
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dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) compile 'com.android.support:appcompat-v7:22.2.0' compile 'com.google.android.gms:play-services:7.5.0' } |
Step 3. Open project Manifest file add permissions in it.
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<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.googlepluszetaintegration"> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.GET_ACCOUNTS" /> <uses-permission android:name="android.permission.USE_CREDENTIALS" /> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme"> <meta-data android:name="com.google.android.gms.version" android:value="@integer/google_play_services_version" /> <activity android:name=".MainActivity" android:label="Trinity Google+"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest> |
Step 4. Now open your Layout file where we add some button and textview to login and show logged user data.
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<LinearLayout 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:orientation="vertical" android:padding="16dp" tools:context=".MainActivity" > <LinearLayout android:id="@+id/llProfile" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginBottom="20dp" android:orientation="horizontal" android:weightSum="3" android:visibility="gone"> <ImageView android:id="@+id/imgProfilePic" android:layout_width="150dp" android:layout_height="150dp" android:layout_weight="1"/> <LinearLayout android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:orientation="vertical" android:layout_weight="2" > <TextView android:id="@+id/txtName" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5dp" android:textSize="20dp" /> <TextView android:id="@+id/txtEmail" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5dp" android:textSize="18dp" /> <TextView android:id="@+id/token" android:layout_width="wrap_content" android:layout_height="wrap_content" android:padding="5dp" android:textSize="18dp" /> </LinearLayout> </LinearLayout> <com.google.android.gms.common.SignInButton android:id="@+id/btn_sign_in" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_marginBottom="20dp"/> <Button android:id="@+id/btn_sign_out" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/btn_logout_from_google" android:visibility="gone" android:layout_marginBottom="10dp"/> <Button android:id="@+id/btn_revoke_access" android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/btn_revoke_access" android:visibility="gone" /> </LinearLayout> |
Step 5. Now add following given below code in your activity to complete your login.
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public class MainActivity extends Activity implements ConnectionCallbacks, OnConnectionFailedListener, View.OnClickListener { 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,token; 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); token=(TextView)findViewById(R.id.token); // Button click listeners btnSignIn.setOnClickListener(this); btnSignOut.setOnClickListener(this); btnRevokeAccess.setOnClickListener(this); // Initializing google plus api client mGoogleApiClient = new GoogleApiClient.Builder(this) .addConnectionCallbacks(this) .addOnConnectionFailedListener(this).addApi(Plus.API,new 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(); } } /** * 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; } } 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); } }); } } private void signOutFromGplus() { if (mGoogleApiClient.isConnected()) { Plus.AccountApi.clearDefaultAccount(mGoogleApiClient); mGoogleApiClient.disconnect(); mGoogleApiClient.connect(); updateUI(false); } } /** * Sign-in into google */ private void signInWithGplus() { if (!mGoogleApiClient.isConnecting()) { mSignInClicked = true; resolveSignInError(); } } /** * Method to resolve any signin errors */ private void resolveSignInError() { if (mConnectionResult.hasResolution()) { try { mIntentInProgress = true; mConnectionResult.startResolutionForResult(this, RC_SIGN_IN); } catch (IntentSender.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); } /** * 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+"====="+ currentPerson.getId().toString()+"====="); 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); AsyncTask<Void, Void, String > task = new AsyncTask<Void, Void, String>() { @Override protected String doInBackground(Void... params) { String token = null; final String SCOPES = "https://www.googleapis.com/auth/plus.login "; try { token = GoogleAuthUtil.getToken( getApplicationContext(), Plus.AccountApi.getAccountName(mGoogleApiClient), "oauth2:" + SCOPES); } catch (IOException e) { e.printStackTrace(); } catch (GoogleAuthException e) { e.printStackTrace(); } catch (IllegalStateException e){ e.printStackTrace(); } return token; } @Override protected void onPostExecute(String tokens) { token.setText("Token Access "+tokens); Log.e(TAG, "Access token retrieved:" + tokens); } }; task.execute(); } else { Toast.makeText(getApplicationContext(), "Person information is null", Toast.LENGTH_LONG).show(); } } catch (Exception e) { e.printStackTrace(); } } /** * 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); } } @Override public void onConnectionSuspended(int arg0) { mGoogleApiClient.connect(); updateUI(false); } /** * 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); } } } |
Now once you complete above steps your app is ready to login user with google+.
🙂