If your Kotlin Android login button is not responding when clicked, the problem could be due to common mistakes in your code or layout. This article provides a complete guide to help you debug and fix the issue efficiently. From checking the XML onClick
binding to verifying activity lifecycle or view binding usage, we’ll cover all necessary steps.

Before jumping into the fix, make sure your Kotlin Android project is correctly set up with View Binding or findViewById(). Additionally, always check your setOnClickListener
implementation inside the onCreate()
function. A broken reference or a misplaced listener can cause the login button to appear unresponsive.
Common Causes of Login Button Not Responding:
setOnClickListener
not properly attached- UI thread is blocked
- View Binding is not initialized
- Button is disabled or hidden
- Click event not reaching the button due to layout overlays
How to Fix the Issue (with Complete Kotlin Code)
1. activity_main.xml
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:padding="24dp"> <EditText android:id="@+id/etUsername" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="Username"/> <EditText android:id="@+id/etPassword" android:layout_width="match_parent" android:layout_height="wrap_content" android:hint="Password" android:inputType="textPassword"/> <Button android:id="@+id/btnLogin" android:layout_width="match_parent" android:layout_height="wrap_content" android:text="Login"/> </LinearLayout>
2. MainActivity.kt
package com.example.loginapp import android.os.Bundle import android.widget.Toast import androidx.appcompat.app.AppCompatActivity import com.example.loginapp.databinding.ActivityMainBinding class MainActivity : AppCompatActivity() { private lateinit var binding: ActivityMainBinding override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) // Initialize view binding binding = ActivityMainBinding.inflate(layoutInflater) setContentView(binding.root) // Set the click listener binding.btnLogin.setOnClickListener { val username = binding.etUsername.text.toString() val password = binding.etPassword.text.toString() if (username == "admin" && password == "1234") { Toast.makeText(this, "Login Successful", Toast.LENGTH_SHORT).show() } else { Toast.makeText(this, "Invalid Credentials", Toast.LENGTH_SHORT).show() } } } }
Bonus Tip:
If you’re not using View Binding, use findViewById
like this:
val btnLogin = findViewById<Button>(R.id.btnLogin) btnLogin.setOnClickListener { /* your code */ }
By following the correct implementation using ViewBinding and checking for UI issues like overlay or disabled states, your Kotlin login button should work as expected. For further enhancement, consider exploring Android official ViewBinding documentation for a deeper understanding.