How to Integrate Social Button in a Mobile App

Add the Facebook SDK to Your Project:
    For Android, add the SDK to your build.gradle file:

implementation 'com.facebook.android:facebook-android-sdk:[5,6)'

pod 'FacebookSDK'

Add your app's details in the Facebook Developer console.
Configure the Android manifest or iOS plist with the Facebook App ID and other necessary configurations.

For Android:

LoginButton loginButton = findViewById(R.id.login_button);
loginButton.setPermissions("email");
loginButton.registerCallback(callbackManager, new FacebookCallback<LoginResult>() {
    @Override
    public void onSuccess(LoginResult loginResult) {
        // Handle success
    }
    @Override
    public void onCancel() {
        // Handle cancel
    }
    @Override
    public void onError(FacebookException exception) {
        // Handle error
    }
});

let loginButton = FBLoginButton()
loginButton.center = view.center
loginButton.permissions = ["public_profile", "email"]
loginButton.delegate = self
view.addSubview(loginButton)

Add the Twitter SDK:
    For Android, add the SDK to your build.gradle file:

implementation 'com.twitter.sdk.android:twitter-core:3.3.0'
implementation 'com.twitter.sdk.android:twitter:3.3.0'

pod 'TwitterKit'

Add your app's details in the Twitter Developer console.
Configure the Android manifest or iOS plist with the Twitter Consumer Key and Secret.

For Android:

TwitterLoginButton loginButton = findViewById(R.id.login_button);
loginButton.setCallback(new Callback<TwitterSession>() {
    @Override
    public void success(Result<TwitterSession> result) {
        // Handle success
    }
    @Override
    public void failure(TwitterException exception) {
        // Handle failure
    }
});

let loginButton = TWTRLogInButton { (session, error) in
    if let unwrappedSession = session {
        // Handle success
    } else {
        // Handle error
    }
}
loginButton.center = self.view.center
self.view.addSubview(loginButton)

Add the Google Sign-In SDK:
    For Android, add the SDK to your build.gradle file:

implementation 'com.google.android.gms:play-services-auth:19.0.0'

pod 'GoogleSignIn'

Enable the Google Sign-In API in the Google Developers Console.
Configure the Android manifest or iOS plist with the necessary OAuth client details.

For Android:

GoogleSignInOptions gso = new GoogleSignInOptions.Builder(GoogleSignInOptions.DEFAULT_SIGN_IN)
        .requestEmail()
        .build();
GoogleSignInClient mGoogleSignInClient = GoogleSignIn.getClient(this, gso);
SignInButton signInButton = findViewById(R.id.sign_in_button);
signInButton.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
        Intent signInIntent = mGoogleSignInClient.getSignInIntent();
        startActivityForResult(signInIntent, RC_SIGN_IN);
    }
});

GIDSignIn.sharedInstance().clientID = YOUR_CLIENT_ID
let signInButton = GIDSignInButton()
signInButton.center = view.center
view.addSubview(signInButton)

Add the LinkedIn SDK:
    LinkedIn provides SDKs for both Android and iOS. Follow their official documentation for the latest integration steps.

Configure the LinkedIn App:
    Add your app's details in the LinkedIn Developer console.
    Configure the Android manifest or iOS plist with the LinkedIn Client ID and Secret.

Implement Login Button:
    For Android:

LISessionManager.getInstance(getApplicationContext()).init(this, buildScope(), new AuthListener() {
    @Override
    public void onAuthSuccess() {
        // Handle success
    }
    @Override
    public void onAuthError(LIAuthError error) {
        // Handle error
    }
}, true);

    For iOS, follow the LinkedIn iOS SDK documentation for detailed implementation steps.

Clear Call-to-Action: Use clear labels and familiar logos to help users quickly identify the social login options.

Feedback Mechanisms: Provide feedback during the login process, such as loading indicators or error messages, to inform users of the login status.

Privacy and Permissions: Clearly communicate the permissions required by each social login and how user data will be used.

The login process works smoothly without errors.

Proper handling of edge cases, such as canceled logins or network issues.

Secure handling of user data and tokens.