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How to integrate Amazon Cognito with Google Plus for Android?

This is my first question, so please be careful. As part of my university project, I need to develop an Android application that allows you to upload files and share files with other users. I am new to Android programming (I watched some Android Beginner videos and developed some basic applications for practice) and was the first to use cloud computing as a developer. I am using Amazon web services.

I have a code that allows me to log in using my google account and will show my name, email id and profile photo after logging in. I want to integrate it with Amazon Cognito so that I can get a unique identifier that I can use to further work on AWS. How can I get this unique key for each user who signs in the application?

I watched some tutorials but couldn't figure out how to integrate Cognito code into my code.

Here is my code.

package com.unicloud.project; import java.io.IOException; import java.io.InputStream; import java.util.HashMap; import java.util.Map; import android.accounts.AccountManager; import android.app.Activity; import android.content.Context; 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.google.android.gms.auth.GoogleAuthException; import com.google.android.gms.auth.GoogleAuthUtil; 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.Account; import com.google.android.gms.plus.Plus; import com.google.android.gms.plus.model.people.Person; import com.amazonaws.auth.CognitoCachingCredentialsProvider; import com.amazonaws.regions.Regions; public class loginWithGooglePlus extends Activity implements OnClickListener, ConnectionCallbacks, OnConnectionFailedListener { private static final int RC_SIGN_IN = 0; // Logcat tag private static final String TAG = "loginWithGooglePlus"; // 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_login_with_google_plus); 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, new Plus.PlusOptions.Builder().build()) // note the options .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 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 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.menu_login_with_google_plus, 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(); } } /** * 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) .setResultCallback(new ResultCallback<Status>() { @Override public void onResult(Status arg0) { Log.e(TAG, "User access revoked!"); 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); } } }

This link has Android code, but I'm not sure where to add this code to the program. Should I create a new class? Please help me with this.

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Have you looked at the CognitoSync sample available on GitHub? It should give you some ideas on how to integrate Cognito into your application.

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Source: https://habr.com/ru/post/1211642/

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