kotlinwrapper

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    val radioGroup = findViewById<RadioGroup>(R.id.radioGroup)
    val clearBtn = findViewById<Button>(R.id.clearBtn)
    val wifi = findViewById<RadioButton>(R.id.wifi)
    val bluetooth = findViewById<RadioButton>(R.id.bluetooth)

    bluetooth.setOnCheckedChangeListener { _, isChecked ->
        if (isChecked) {
            Toast.makeText(this, "Bluetooth turned on", Toast.LENGTH_SHORT).show()
        }
    }

    wifi.setOnCheckedChangeListener { _, isChecked ->
        if (isChecked) {
            Toast.makeText(this, "Wi-Fi turned ON", Toast.LENGTH_SHORT).show()
        }
    }

    clearBtn.setOnClickListener {
        radioGroup.clearCheck()
        Toast.makeText(this, "Selection Cleared", Toast.LENGTH_SHORT).show()
    }

<RadioButton android:id="@+id/wifi" ... />

<RadioButton android:id="@+id/bluetooth" ... />

<RadioButton android:id="@+id/airplane" ... />

val radioGroup = findViewById(R.id.radioGroup) val clearBtn = findViewById(R.id.clearBtn)

    radioGroup.setOnCheckedChangeListener { _, checkedId ->
        val message = when (checkedId) {
            R.id.wifi -> "Wi-Fi turned ON"
            R.id.bluetooth -> "Bluetooth turned ON"
            R.id.airplane -> "Airplane Mode turned ON"
            else -> ""
        }

            if (message.isNotEmpty()){
            Toast.makeText(this, message, Toast.LENGTH_SHORT).show()
        }
        
    }

clearBtn.setOnClickListener { radioGroup.clearCheck() Toast.makeText(this, "Selection Cleared", Toast.LENGTH_SHORT).show() }

button7.setOnClickListener { val firstName = editTextText5.text.toString() val lastName = editTextText6.text.toString() val birthDate = editTextText7.text.toString() val country = editTextText8.text.toString()

        val message = "Name: $firstName $lastName\nBirthdate: $birthDate\nCountry: $country"
        Toast.makeText(this, message, Toast.LENGTH_LONG).show()
    }

val usernameEditText = findViewById(R.id.editTextText10) val passwordEditText = findViewById(R.id.editTextTextPassword) val submitButton = findViewById

(R.id.button8)

    submitButton.setOnClickListener {

        val username = usernameEditText.text.toString()
        val password = passwordEditText.text.toString()

        if (username.isEmpty() || password.isEmpty()) {
            Toast.makeText(this, "Please enter all fields.", Toast.LENGTH_SHORT).show()
        } else {
            val dialog = AlertDialog.Builder(this)
                .setTitle("Login Success")
                .setMessage("Welcome, $username!")
                .setPositiveButton("OK", null)
                .create()
            dialog.show()
        }
    }

    val btn = findViewById<Button>(R.id.btn)
    btn.setOnClickListener{
        Intent(this,SecondActivity::class.java).also{
            startActivity(it)

        }
    }

    val back = findViewById<Button>(R.id.back)
    back.setOnClickListener{
        finish()
    }
    val next = findViewById<Button>(R.id.next)
    next.setOnClickListener{
        Intent(this,ThirdActivity::class.java).also{
            startActivity(it)
        }
    }

    send.setOnClickListener {
        val nameText = name.text.toString()
        val ageText = age.text.toString()
        Intent(this, MainActivity2::class.java).also {
            it.putExtra("name", nameText)
            it.putExtra("age", ageText)
            startActivity(it)
        }
    }

    val displayText = findViewById<TextView>(R.id.displayText)
    val name  = intent.getStringExtra("name")
    val age = intent.getStringExtra(("age"))
    displayText.text = "Name :$name\nage:$age"

#drawable --> new ---> vector asset

custom_icon.xml :----

<item android:state_checked="true" android:drawable="@drawable/outline_arrow_downward_alt_24"/>
<item android:state_checked="false" android:drawable="@drawable/outline_arrow_upward_alt_24"/>

EACH button :------ android:button="@drawable/custom_icon"

Custom Toast :---

class MainActivity : AppCompatActivity() {

// ✅ Reusable custom toast function
private fun showCustomToast(message: String, imageResId: Int) 
{
    // Inflate custom_toast.xml
    val layout = layoutInflater.inflate(R.layout.custom_toast, null)

    // Get views from custom layout
    val toastText = layout.findViewById<TextView>(R.id.toast_text)
    val toastIcon = layout.findViewById<ImageView>(R.id.toast_icon)

    // Set message and image
    toastText.text = message
    toastIcon.setImageResource(imageResId)

    // Build and show toast
    Toast(applicationContext).apply 
    {
        duration = Toast.LENGTH_SHORT
        view = layout
        show()
    }
}

override fun onCreate(savedInstanceState: Bundle?) 
{
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    // Example usage — call this wherever needed
    val button = findViewById<Button>(R.id.showToastButton)
    button.setOnClickListener 
    {
        showCustomToast("Hello, Anurag!", R.drawable.images)  // 🔁 Use your drawable image
    }
}

}

res/menu/app_bar_menu.xml

<item
    android:id="@+id/miSettings"
    android:title="Settings"
    android:icon="@drawable/ic_settings"
    app:showAsAction="ifRoom" />

<item
    android:id="@+id/miAddContact"
    android:title="Add Contact"
    android:icon="@drawable/ic_settings"
    app:showAsAction="ifRoom" />

<item
    android:id="@+id/miSettings"
    android:title="Settings"
    android:icon="@drawable/ic_settings"
    app:showAsAction="ifRoom" />

<item
    android:id="@+id/miSettings"
    android:title="Settings"
    android:icon="@drawable/ic_settings"
    app:showAsAction="ifRoom" />

MainActivity.kt

package com.example.myapplication

import android.os.Bundle import android.view.Menu import android.view.MenuItem import android.widget.Toast import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) }

// Inflate the menu
override fun onCreateOptionsMenu(menu: Menu?): Boolean {
    menuInflater.inflate(R.menu.app_bar_menu, menu)
    return true
}

// Handle item clicks
override fun onOptionsItemSelected(item: MenuItem): Boolean {
    when (item.itemId) {
        R.id.miAddContact -> {
            Toast.makeText(this, "You clicked on Add Contact", Toast.LENGTH_SHORT).show()
        }
        R.id.miFavorites -> {
            Toast.makeText(this, "You clicked on Favorites", Toast.LENGTH_SHORT).show()
        }
        R.id.miSettings -> {
            Toast.makeText(this, "You clicked on Settings", Toast.LENGTH_SHORT).show()
        }
        R.id.miClose -> {
            finish() // Closes the activity
        }
        R.id.miFeedback -> {
            Toast.makeText(this, "You clicked on Feedback", Toast.LENGTH_SHORT).show()
        }
    }
    return true
}

}

package com.example.myapplication

import android.os.Bundle import android.view.LayoutInflater import android.widget.* import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {

private fun showCustomToast(message: String) {
    val layout = layoutInflater.inflate(R.layout.custom_toast, null)
    val toastText = layout.findViewById<TextView>(R.id.toast_text)
    toastText.text = message

    Toast(applicationContext).apply {
        duration = Toast.LENGTH_SHORT
        view = layout
        show()
    }
}

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    val num1 = findViewById<EditText>(R.id.num1)
    val num2 = findViewById<EditText>(R.id.num2)

    val btnAdd = findViewById<Button>(R.id.btnAdd)
    val btnSub = findViewById<Button>(R.id.btnSub)
    val btnMul = findViewById<Button>(R.id.btnMul)
    val btnDiv = findViewById<Button>(R.id.btnDiv)

    fun getNumbers(): Pair<Double, Double>? {
        val a = num1.text.toString()
        val b = num2.text.toString()
        if (a.isEmpty() || b.isEmpty()) {
            showCustomToast("Please enter both numbers")
            return null
        }
        return Pair(a.toDouble(), b.toDouble())
    }

    btnAdd.setOnClickListener {
        getNumbers()?.let {
            val result = it.first + it.second
            showCustomToast("Result: $result")
        }
    }

    btnSub.setOnClickListener {
        getNumbers()?.let {
            val result = it.first - it.second
            showCustomToast("Result: $result")
        }
    }

    btnMul.setOnClickListener {
        getNumbers()?.let {
            val result = it.first * it.second
            showCustomToast("Result: $result")
        }
    }

    btnDiv.setOnClickListener {
        getNumbers()?.let {
            if (it.second == 0.0) {
                showCustomToast("Cannot divide by 0")
            } else {
                val result = it.first / it.second
                showCustomToast("Result: $result")
            }
        }
    }
}

}

package com.example.myapplication

import android.os.Bundle import android.view.View import android.widget.Button import android.widget.Toast import androidx.appcompat.app.AlertDialog import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main)

    // Button for add contact dialog
    val btnDialog1 = findViewById<Button>(R.id.btnDialog1)
    btnDialog1.setOnClickListener {
        val addContactDialog = AlertDialog.Builder(this)
            .setTitle("Add contact")
            .setMessage("Do you want to add Mr. Poop to your contacts list?")
            .setIcon(R.drawable.ic_add_contact)
            .setPositiveButton("Yes") { _, _ ->
                Toast.makeText(this, "You added Mr. Poop to your contact list", Toast.LENGTH_SHORT).show()
            }
            .setNegativeButton("No") { _, _ ->
                Toast.makeText(this, "You didn't add Mr. Poop to your contact list", Toast.LENGTH_SHORT).show()
            }
            .create()

        addContactDialog.show()
    }

    // Button for single-choice dialog
    val btnDialog2 = findViewById<Button>(R.id.btnDialog2)
    btnDialog2.setOnClickListener {
        val options = arrayOf("First Item", "Second Item", "Third Item")

        val singleChoiceDialog = AlertDialog.Builder(this)
            .setTitle("Choose one of these options")
            .setSingleChoiceItems(options, 0) { _, i ->
                Toast.makeText(this, "You clicked on ${options[i]}", Toast.LENGTH_SHORT).show()
            }
            .setPositiveButton("Accept") { _, _ ->
                Toast.makeText(this, "You accepted the SingleChoiceDialog", Toast.LENGTH_SHORT).show()
            }
            .setNegativeButton("Decline") { _, _ ->
                Toast.makeText(this, "You declined the SingleChoiceDialog", Toast.LENGTH_SHORT).show()
            }
            .create()

        singleChoiceDialog.show()
    }
}

}

spinner

res/values/strings.xml

MyApplication

<!-- String array used to fill Spinner items -->
<string-array name="months">
    <item>January</item>
    <item>February</item>
    <item>March</item>
    <item>April</item>
    <item>May</item>
    <item>June</item>
    <item>July</item>
    <item>August</item>
    <item>September</item>
    <item>October</item>
    <item>November</item>
    <item>December</item>
</string-array>

activity_main.xml

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" android:padding="16dp">

<!-- Spinner dropdown to show month list -->
<Spinner
    android:id="@+id/spMonths"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:entries="@array/months" <!-- Link string-array from strings.xml -->
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    app:layout_constraintHorizontal_bias="0.5" />

</androidx.constraintlayout.widget.ConstraintLayout>

package com.example.myapplication

import android.os.Bundle import android.view.View import android.widget.AdapterView import android.widget.Spinner import android.widget.Toast import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main)

    // 1. Get reference to Spinner from layout
    val spMonths = findViewById<Spinner>(R.id.spMonths)

    // 2. Set listener to detect item selection from spinner
    spMonths.onItemSelectedListener = object : AdapterView.OnItemSelectedListener {

        // This method is called when an item is selected
        override fun onItemSelected(
            parent: AdapterView<*>?,  // Spinner view
            view: View?,              // Row view (not used here)
            position: Int,            // Index of selected item
            id: Long                  // Row ID (not used here)
        ) {
            // Get selected item text using position
            val selectedMonth = parent?.getItemAtPosition(position).toString()

            // Show a toast message
            Toast.makeText(this@MainActivity, "You selected $selectedMonth", Toast.LENGTH_LONG).show()
        }

        // This method is called if nothing is selected (optional)
        override fun onNothingSelected(parent: AdapterView<*>?) {
            // Optional: You can leave this blank or add default action
        }
    }
}

}

package com.example.myapplication

import android.os.Bundle import android.widget.Button import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main)

    // Create fragment instances
    val firstFragment = FirstFragment()
    val secondFragment = SecondFragment()

    // Set initial fragment to FirstFragment
    supportFragmentManager.beginTransaction().apply {
        replace(R.id.flFragment, firstFragment)
        commit()
    }

    // Find buttons from layout
    val btnFragment1 = findViewById<Button>(R.id.btnFragment1)
    val btnFragment2 = findViewById<Button>(R.id.btnFragment2)

    // Set listener for Fragment1 button
    btnFragment1.setOnClickListener {
        supportFragmentManager.beginTransaction().apply {
            replace(R.id.flFragment, firstFragment)
            commit()
        }
    }

    // Set listener for Fragment2 button
    btnFragment2.setOnClickListener {
        supportFragmentManager.beginTransaction().apply {
            replace(R.id.flFragment, secondFragment)
            commit()
        }
    }
}

}

<!-- Button to load FirstFragment -->
<Button
    android:id="@+id/btnFragment1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="First Fragment"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    android:layout_margin="16dp" />

<!-- Button to load SecondFragment -->
<Button
    android:id="@+id/btnFragment2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Second Fragment"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    android:layout_margin="16dp" />

<!-- FrameLayout container to load fragments -->
<FrameLayout
    android:id="@+id/flFragment"
    android:layout_width="0dp"
    android:layout_height="0dp"
    app:layout_constraintTop_toBottomOf="@id/btnFragment1"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintStart_toStartOf="parent"
    app:layout_constraintEnd_toEndOf="parent"
    android:layout_marginTop="16dp" />

</androidx.constraintlayout.widget.ConstraintLayout>

FirstFragment.kt

package com.example.myapplication

import android.os.Bundle import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import androidx.fragment.app.Fragment

class FirstFragment : Fragment() { override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { // Inflate layout for FirstFragment return inflater.inflate(R.layout.fragment_first, container, false) } }

SecondFragment.kt

package com.example.myapplication

import android.os.Bundle import android.view.LayoutInflater import android.view.View import android.view.ViewGroup import androidx.fragment.app.Fragment

class SecondFragment : Fragment() { override fun onCreateView( inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle? ): View? { // Inflate layout for SecondFragment return inflater.inflate(R.layout.fragment_second, container, false) } }

fragment_first.xml

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="This is First Fragment"
    android:layout_gravity="center"
    android:textSize="18sp"/>

fragment_second.xml

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="This is Second Fragment"
    android:layout_gravity="center"
    android:textSize="18sp"/>

DBHelper.kt package com.example.myapplication

import android.content.ContentValues import android.content.Context import android.database.sqlite.SQLiteDatabase import android.database.sqlite.SQLiteOpenHelper

class DBHelper(context: Context) : SQLiteOpenHelper(context, "UserDB", null, 1) {

override fun onCreate(db: SQLiteDatabase?) {
    // Table with ID, Name, and Age
    db?.execSQL("CREATE TABLE users(id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, age INTEGER)")
}

override fun onUpgrade(db: SQLiteDatabase?, oldVersion: Int, newVersion: Int) {
    // Drops table if exists and recreates it
    db?.execSQL("DROP TABLE IF EXISTS users")
    onCreate(db)
}

// Insert user into table
fun insertUser(name: String, age: Int): Boolean {
    val db = writableDatabase
    val values = ContentValues()
    values.put("name", name)
    values.put("age", age)
    val result = db.insert("users", null, values)
    return result != -1L
}

// Read all users
fun getAllUsers(): String {
    val db = readableDatabase
    val cursor = db.rawQuery("SELECT * FROM users", null)
    val buffer = StringBuffer()
    while (cursor.moveToNext()) {
        buffer.append("ID: ${cursor.getInt(0)}\n")
        buffer.append("Name: ${cursor.getString(1)}\n")
        buffer.append("Age: ${cursor.getInt(2)}\n\n")
    }
    cursor.close()
    return buffer.toString()
}

// Update user by ID
fun updateUser(id: Int, name: String, age: Int): Boolean {
    val db = writableDatabase
    val values = ContentValues()
    values.put("name", name)
    values.put("age", age)
    val result = db.update("users", values, "id=?", arrayOf(id.toString()))
    return result > 0
}

// Delete user by ID
fun deleteUser(id: Int): Boolean {
    val db = writableDatabase
    val result = db.delete("users", "id=?", arrayOf(id.toString()))
    return result > 0
}

}

Activity_xml

<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="16dp">

    <EditText
        android:id="@+id/editId"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter ID (for Update/Delete)"
        android:inputType="number" />

    <EditText
        android:id="@+id/editName"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter Name" />

    <EditText
        android:id="@+id/editAge"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:hint="Enter Age"
        android:inputType="number" />

    <Button
        android:id="@+id/btnInsert"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Insert" />

    <Button
        android:id="@+id/btnView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="View All" />

    <Button
        android:id="@+id/btnUpdate"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Update" />

    <Button
        android:id="@+id/btnDelete"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:text="Delete" />
</LinearLayout>

MainActivity package com.example.myapplication

import android.os.Bundle import android.widget.* import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {

lateinit var dbHelper: DBHelper

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    dbHelper = DBHelper(this)

    val idInput = findViewById<EditText>(R.id.editId)
    val nameInput = findViewById<EditText>(R.id.editName)
    val ageInput = findViewById<EditText>(R.id.editAge)
    val insertBtn = findViewById<Button>(R.id.btnInsert)
    val viewBtn = findViewById<Button>(R.id.btnView)
    val updateBtn = findViewById<Button>(R.id.btnUpdate)
    val deleteBtn = findViewById<Button>(R.id.btnDelete)

    // INSERT button click
    insertBtn.setOnClickListener {
        val name = nameInput.text.toString()
        val age = ageInput.text.toString().toIntOrNull()
        if (name.isNotEmpty() && age != null) {
            val success = dbHelper.insertUser(name, age)
            Toast.makeText(this, if (success) "Inserted" else "Failed", Toast.LENGTH_SHORT).show()
        } else {
            Toast.makeText(this, "Fill valid name and age", Toast.LENGTH_SHORT).show()
        }
    }

    // VIEW button click
    viewBtn.setOnClickListener {
        val result = dbHelper.getAllUsers()
        showMessage("All Users", result)
    }

    // UPDATE button click
    updateBtn.setOnClickListener {
        val id = idInput.text.toString().toIntOrNull()
        val name = nameInput.text.toString()
        val age = ageInput.text.toString().toIntOrNull()
        if (id != null && name.isNotEmpty() && age != null) {
            val success = dbHelper.updateUser(id, name, age)
            Toast.makeText(this, if (success) "Updated" else "Failed", Toast.LENGTH_SHORT).show()
        } else {
            Toast.makeText(this, "Fill valid ID, name, and age", Toast.LENGTH_SHORT).show()
        }
    }

    // DELETE button click
    deleteBtn.setOnClickListener {
        val id = idInput.text.toString().toIntOrNull()
        if (id != null) {
            val success = dbHelper.deleteUser(id)
            Toast.makeText(this, if (success) "Deleted" else "Failed", Toast.LENGTH_SHORT).show()
        } else {
            Toast.makeText(this, "Enter valid ID", Toast.LENGTH_SHORT).show()
        }
    }
}

// Helper to show result in dialog
private fun showMessage(title: String, message: String) {
    val dialog = android.app.AlertDialog.Builder(this)
    dialog.setTitle(title)
    dialog.setMessage(message)
    dialog.setPositiveButton("OK", null)
    dialog.show()
}

}

<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/main" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity">

<!-- Horizontal ProgressBar (initially hidden) -->
<ProgressBar
    android:id="@+id/progressBar"
    style="@android:style/Widget.ProgressBar.Horizontal"
    android:layout_width="0dp"
    android:layout_height="wrap_content"
    android:layout_marginTop="100dp"
    android:max="100"
    android:progress="0"
    android:visibility="gone"
    android:progressTint="@android:color/holo_blue_light"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent" />

<!-- Start Button -->
<Button
    android:id="@+id/startButton"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Start Progress"
    app:layout_constraintTop_toBottomOf="@id/progressBar"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    android:layout_marginTop="20dp" />

</androidx.constraintlayout.widget.ConstraintLayout>

package com.example.myapplication

import android.os.Bundle import android.os.Handler import android.os.Looper import android.view.View import android.widget.Button import android.widget.ProgressBar import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {

private lateinit var progressBar: ProgressBar
private lateinit var startButton: Button

private var progressStatus = 0 // Track current progress
private val handler = Handler(Looper.getMainLooper()) // UI thread handler

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    setContentView(R.layout.activity_main)

    // Link XML views to Kotlin variables
    progressBar = findViewById(R.id.progressBar)
    startButton = findViewById(R.id.startButton)

    // Set up button click listener
    startButton.setOnClickListener {
        progressBar.visibility = View.VISIBLE // Show progress bar
        progressBar.progress = 0 // Reset progress
        progressStatus = 0

        // Start background thread to simulate progress
        Thread {
            while (progressStatus < 100) {
                progressStatus += 1

                // Update progress on UI thread
                handler.post {
                    progressBar.progress = progressStatus
                }

                Thread.sleep(50) // Simulate work (delay)
            }
        }.start()
    }
}

}

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Jun 30, 2025

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Jun 30, 2025

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kotlinwrapper 0.1.1

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