how to set up cognito identity pool in android?

Question

I am completely new to aws cognito, and these guides are all over the place and i am kind of lost. In my aws account i have made an identity pool, and now i want to try to create a new user from my android app, but it fails to create user or fails to connect to the cognito pool. I am not sure if i am doing this write and hope for your guidance!

Here is what i have so far.

public class aws extends AppCompatActivity
{
    private EditText firstName,lastName,email,password;
    private Button loginButton;
    private String poolId,clientId,clientSecret;
    CognitoUserPool userPool;
    CognitoUserAttributes userAttributes;
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_register);

        CognitoCachingCredentialsProvider credentialsProvider = new
                CognitoCachingCredentialsProvider(
                getApplicationContext(), // Context
                "IDENTITY POOL_ID", // Identity Pool ID
                MY_REGION // Region
        );
        CognitoSyncManager syncClient = new CognitoSyncManager(
                getApplicationContext(), // Context
                MY_REGION, // Region
                credentialsProvider
        );
        Dataset dataset = syncClient.openOrCreateDataset("myDataset");
        dataset.put("myKey", "myValue");
        dataset.synchronize(new DefaultSyncCallback() {
            @Override
            public void onSuccess(Dataset dataset, List newRecords) {
                //Your handler code here
            }
        });

        poolId = "MY_POOL_ID";
        clientId = "MY_CLIENT_ID";
        clientSecret = "MY_CLIENT_SECRET";
        ClientConfiguration clientConfiguration = new ClientConfiguration();
        // Create a CognitoUserPool object to refer to your user pool
        userPool = new CognitoUserPool(getBaseContext(), poolId, clientId, clientSecret, clientConfiguration);

        bindActivity();
    }
    private void bindActivity()
    {
        firstName = (EditText) findViewById(R.id.register_firstNameET);
        lastName = (EditText) findViewById(R.id.register_lastNameET);
        email = (EditText) findViewById(R.id.register_emailET);
        password = (EditText) findViewById(R.id.register_passwordET);
        loginButton = (Button) findViewById(R.id.intro_register_zivit_button);
        loginButton.setOnClickListener(new View.OnClickListener()
        {
            @Override
            public void onClick(View v)
            {
                setUpCognito();
            }
        });
    }
    private void setUpCognito()
    {
        // Create a CognitoUserAttributes object and add user attributes
         userAttributes = new CognitoUserAttributes();
        // Add the user attributes. Attributes are added as key-value pairs

        // Adding user's given name.
        // Note that the key is "given_name" which is the OIDC claim for given name
        userAttributes.addAttribute("given_name", firstName.getText().toString());

        // Adding user's lastName
        userAttributes.addAttribute("family_Name", lastName.getText().toString());
        // Adding user's email address
        userAttributes.addAttribute("email", email.getText().toString());

        setUpCognitoHandler();

    }

    private void setUpCognitoHandler()
    {
        SignUpHandler signupCallback = new SignUpHandler() {

            @Override
            public void onSuccess(CognitoUser cognitoUser, boolean userConfirmed, CognitoUserCodeDeliveryDetails cognitoUserCodeDeliveryDetails)
            {
                Log.d("myCognito","sign up succeeded!");
                // Sign-up was successful

                // Check if this user (cognitoUser) needs to be confirmed
                if(!userConfirmed)
                {
                    Log.d("myCognito","not confirmed! Need to confirm");
                    confirmUser();
                    // This user must be confirmed and a confirmation code was sent to the user
                    // cognitoUserCodeDeliveryDetails will indicate where the confirmation code was sent
                    // Get the confirmation code from user
                }
                else {
                    Log.d("myCognito","confirmed!");
                    // The user has already been confirmed
                }
            }

            @Override
            public void onFailure(Exception exception)
            {
                Log.d("myCognito","sign up failed!");
                // Sign-up failed, check exception for the cause
            }
        };
        userPool.signUpInBackground("user1ID", password.getText().toString(), userAttributes, null, signupCallback);
    }

    private void confirmUser()
    {
        // Callback handler for confirmSignUp API
        GenericHandler confirmationCallback = new GenericHandler() {

            @Override
            public void onSuccess() {
                // User was successfully confirmed
                Log.d("myCognito","Confirmed User Success!");
            }

            @Override
            public void onFailure(Exception exception) {
                // User confirmation failed. Check exception for the cause.
                Log.d("myCognito","Confirmed User faileure :(");
            }
        };
    }
}

Again im really confused on how to make this class, when i used mobile hub, the code was all over the place in the sample app.

Answer 1

Try this Document Amazon Cognito Credentials Provider

In Mobile hub look for this file CognitoUserPoolsSignInProvider

It has all the details how the sign in works

Below is the Authenctication Handler (I have commented few things to remove errors)

private AuthenticationHandler authenticationHandler = new AuthenticationHandler() {
    @Override
    public void onSuccess(final CognitoUserSession userSession, final CognitoDevice newDevice) {
        Log.i(LOG_TAG, "Logged in. " + userSession.getIdToken());

        cognitoUserSession = userSession;

        if (null != resultsHandler) {
            ViewHelper.showDialog(activity, activity.getString(title_activity_sign_in),
                    activity.getString(login_success) + " " + userSession.getIdToken());

            resultsHandler.onSuccess(CognitoUserPoolsSignInProvider.this);
        }

        initializedLatch.countDown();
    }

    @Override
    public void getAuthenticationDetails(
            final AuthenticationContinuation authenticationContinuation, final String userId) {

        if (null != username && null != password) {
            final AuthenticationDetails authenticationDetails = new AuthenticationDetails(
                    username,
                    password,
                    null);

            authenticationContinuation.setAuthenticationDetails(authenticationDetails);
            authenticationContinuation.continueTask();
        }

        initializedLatch.countDown();
    }

    @Override
    public void getMFACode(final MultiFactorAuthenticationContinuation continuation) {
        multiFactorAuthenticationContinuation = continuation;

        //todo uncomment it
       /* final Intent intent = new Intent(context, MFAActivity.class);
        activity.startActivityForResult(intent, MFA_REQUEST_CODE);*/
    }

    @Override
    public void authenticationChallenge(final ChallengeContinuation continuation) {
        throw new UnsupportedOperationException("Not supported in this sample.");
    }

    @Override
    public void onFailure(final Exception exception) {
        Log.e(LOG_TAG, "Failed to login.", exception);

        if (null != resultsHandler) {
            ViewHelper.showDialog(activity, activity.getString(R.string.title_activity_sign_in),
                    "Failed" + " " + exception);
            // activity.getString(  //todo uncomment it) + " " + exception);

                    resultsHandler.onError(CognitoUserPoolsSignInProvider.this, exception);
        }

        initializedLatch.countDown();
    }
};

This is the onClick Listener

@Override
    public View.OnClickListener initializeSignInButton(final Activity signInActivity,
                                                       final View buttonView,
                                                       final IdentityManager.SignInResultsHandler resultsHandler) {

        this.activity = signInActivity;
        this.resultsHandler = resultsHandler;

        // User Pools requires sign in with the username or verified channel.
        // Mobile Hub does not set up email verification because it requires SES verification.
        // Hence, prompt customers to login using the username or phone number.
        final EditText emailField = (EditText) activity.findViewById(EDIT_TEXT_USERNAME_ID);
        emailField.setHint(R.string.button_text_sign_in);


        final View.OnClickListener listener = new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                username = ViewHelper.getStringValue(activity, EDIT_TEXT_USERNAME_ID);
                password = ViewHelper.getStringValue(activity, EDIT_TEXT_PASSWORD_ID);

                final CognitoUser cognitoUser = cognitoUserPool.getUser(username);

                cognitoUser.getSessionInBackground(authenticationHandler);
            }
        };

        buttonView.setOnClickListener(listener);
        return listener;
    }