In this tutorial we will create alert dialog with single choice from list of items. We will create a button that show alert dialog when that button is clicked, a TextView that shows the selected item from dialog.
Step 1: Create a new project OR Open your project
Step 2: Code
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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"
android:padding="20dp"
android:orientation="vertical"
tools:context=".MainActivity">
<Button
android:id="@+id/showsnackbarbtn"
android:text="Show Alert Dialog"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:id="@+id/txtView"
android:text="Selected Item"
android:textSize="20sp"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
MainActivity.java
package com.jigopost.myapplication;
import android.content.DialogInterface;
import android.os.Bundle;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
public class MainActivity extends AppCompatActivity {
String[] listItems;
@Override
protected void onCreate(final Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final TextView textView = findViewById(R.id.txtView);
Button showDialog = findViewById(R.id.showsnackbarbtn);
showDialog.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
listItems = new String[]{"Item 1", "Item 2", "Item 3"};
AlertDialog.Builder mBuilder = new AlertDialog.Builder(MainActivity.this);
mBuilder.setTitle("Choose an item");
mBuilder.setSingleChoiceItems(listItems, -1, new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialogInterface, int i) {
textView.setText(listItems[i]);
dialogInterface.dismiss();
}
});
// Set the neutral/cancel button click listener
mBuilder.setNeutralButton("Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
// Do something when click the neutral button
dialog.cancel();
}
});
AlertDialog mDialog = mBuilder.create();
mDialog.show();
}
});
}
}
Step 3: Output
