Login Listeners

Android Activity and Fragment lifecycle patterns for CometChat login and logout event handling

AI Integration Quick Reference

// Add login listener
CometChat.addLoginListener("LISTENER_ID", object : LoginListener() {
    override fun loginSuccess(user: User) { /* Login successful */ }
    override fun loginFailure(e: CometChatException) { /* Login failed */ }
    override fun logoutSuccess() { /* Logout successful */ }
    override fun logoutFailure(e: CometChatException) { /* Logout failed */ }
})

// Remove listener
CometChat.removeLoginListener("LISTENER_ID")

This page covers Android-specific lifecycle patterns for LoginListener. For the basic add/remove API, see Authentication.

Android Activity/Fragment Example

Register the listener in onCreate() and remove it in onDestroy() to follow the Android lifecycle. Callbacks provide User objects on success and CometChatException on failure:

Java

public class MainActivity extends AppCompatActivity {

    private static final String LISTENER_ID = "LOGIN_LISTENER";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        CometChat.addLoginListener(LISTENER_ID, new CometChat.LoginListener() {
            @Override
            public void loginSuccess(User user) {
                Log.d("LoginListener", "loginSuccess: " + user.getName());
                // Initialize user-specific data, navigate to main screen, etc.
            }

            @Override
            public void loginFailure(CometChatException e) {
                Log.d("LoginListener", "loginFailure: " + e.getMessage());
            }

            @Override
            public void logoutSuccess() {
                Log.d("LoginListener", "logoutSuccess");
                // Clean up resources, navigate to login screen, etc.
            }

            @Override
            public void logoutFailure(CometChatException e) {
                Log.d("LoginListener", "logoutFailure: " + e.getMessage());
            }
        });
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        CometChat.removeLoginListener(LISTENER_ID);
    }
}

Kotlin

class MainActivity : AppCompatActivity() {

    private val LISTENER_ID = "LOGIN_LISTENER"

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        CometChat.addLoginListener(LISTENER_ID, object : LoginListener() {
            override fun loginSuccess(user: User) {
                Log.d("LoginListener", "loginSuccess: ${user.name}")
                // Initialize user-specific data, navigate to main screen, etc.
            }

            override fun loginFailure(e: CometChatException) {
                Log.d("LoginListener", "loginFailure: ${e.message}")
            }

            override fun logoutSuccess() {
                Log.d("LoginListener", "logoutSuccess")
                // Clean up resources, navigate to login screen, etc.
            }

            override fun logoutFailure(e: CometChatException) {
                Log.d("LoginListener", "logoutFailure: ${e.message}")
            }
        })
    }

    override fun onDestroy() {
        super.onDestroy()
        CometChat.removeLoginListener(LISTENER_ID)
    }
}

Always remove login listeners when they’re no longer needed (e.g., in onDestroy() or when navigating away). Failing to remove listeners can cause memory leaks and duplicate event handling.

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Next Steps

Authentication

Login methods, Auth Key vs Auth Token, and logout

Real-Time Listeners

Register listeners for messages, users, groups, and calls

Connection Status

Monitor connection status to CometChat servers

Setup SDK

Initialize the SDK before logging in users