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How to display a list view in an Android Alert Dialog in Kotlin?
This example demonstrates how to display a list view in an Android Alert Dialog.
Step 1 − Create a new project in Android Studio, go to File ⇉ New Project and fill all required details to create a new project.
Step 2 − Add the following code to res/layout/activity_main.xml.
<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:padding="8dp"> <TextView android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_marginTop="40dp" android:text="Tutorials Point" android:textAlignment="center" android:textColor="@android:color/holo_blue_light" android:textSize="32sp" android:textStyle="bold" /> <Button android:id="@+id/btnClick" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:onClick="openDialog" android:text="Click here to get ListView in Alert Dialog" android:textSize="12sp" android:textStyle="bold" /> </RelativeLayout>
Step 3 − Add the following code to src/MainActivity.kt
import android.os.Bundle import android.view.View import android.widget.ArrayAdapter import android.widget.ListView import android.widget.Toast import androidx.appcompat.app.AlertDialog import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { var country = arrayOf( "India", "Brazil", "Argentina", "Portugal", "France", "England", "Italy" ) lateinit var adapter: ArrayAdapter<String> lateinit var listView: ListView lateinit var alertDialog: AlertDialog.Builder lateinit var dialog: AlertDialog override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) title = "KotlinApp" } fun openDialog(view: View) { alertDialog = AlertDialog.Builder(this) val rowList: View = layoutInflater.inflate(R.layout.row, null) listView = rowList.findViewById(R.id.listView) adapter = ArrayAdapter(this, android.R.layout.simple_list_item_1, country) listView.adapter = adapter adapter.notifyDataSetChanged() alertDialog.setView(rowList) dialog = alertDialog.create() dialog.show() } fun closeDialog(view: View) { dialog.dismiss() Toast.makeText(baseContext, "Dialog Closed", Toast.LENGTH_SHORT).show() } }
Step 4 − Add the following code to androidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.kotlipapp"> <application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> </application> </manifest>
Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from android studio, open one of your project's activity files and click the Run icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −
Click here to download the project code.