<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".SearchViewExample"
        android:orientation="vertical"
        android:padding="16dp">
    
       <SearchView
           android:id="@+id/search_view"
           android:layout_width="match_parent"
           android:layout_height="wrap_content"/>
   
       <ListView
           android:id="@+id/search_listview"
           android:layout_width="match_parent"
           android:layout_height="match_parent"/>
   
</LinearLayout>
                                    
                                  

                                    
package com.example.widgets;
    
import androidx.appcompat.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.SearchView;
    
import java.util.ArrayList;
   
public class SearchViewExample extends AppCompatActivity {
   
    SearchView searchView;
    ListView listView;
   
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_search_view_example);
   
        searchView=(SearchView)findViewById(R.id.search_view);
        listView=(ListView)findViewById(R.id.search_listview);
   
        final ArrayList<String> arrayList=new ArrayList<>();
   
           arrayList.add("India");
           arrayList.add("America");
           arrayList.add("China");
           arrayList.add("Japan");
           arrayList.add("Nepal");
           arrayList.add("Pakistan");
           arrayList.add("Russia");
           arrayList.add("Australia");
           arrayList.add("Dubai");
           arrayList.add("Saudi Arabia");
           arrayList.add("Qatar");
           arrayList.add("Afghanistan");
           arrayList.add("Bangladesh");
           arrayList.add("Srilanka");
           arrayList.add("Africa");
           arrayList.add("Germany");
           arrayList.add("NewZealand");
           arrayList.add("Portugle");
           arrayList.add("Bahrain");
           arrayList.add("Belgium");
           arrayList.add("Bhutan");
           arrayList.add("Brazil");
           arrayList.add("Colombia");
           arrayList.add("Cyprus");
           arrayList.add("Egypt");
   
        final ArrayAdapter<String> arrayAdapter=new ArrayAdapter<String>(getApplicationContext(),
                R.layout.support_simple_spinner_dropdown_item,arrayList);
           listView.setAdapter(arrayAdapter);
   
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                return false;
            }
   
            @Override
            public boolean onQueryTextChange(String newText) {
   
                arrayAdapter.getFilter().filter(newText);
   
                return false;
            }
        });
   
    }
}
                                    
                                  

                                    
                                        import android.os.Bundle
import android.widget.ArrayAdapter
import android.widget.ListView
import android.widget.SearchView
import androidx.appcompat.app.AppCompatActivity

class SearchViewExample : AppCompatActivity() {

    private lateinit var searchView: SearchView
    private lateinit var listView: ListView
    private lateinit var arrayAdapter: ArrayAdapter

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

        searchView = findViewById(R.id.search_view)
        listView = findViewById(R.id.search_listview)

        val arrayList = arrayListOf(
            "India", "America", "China", "Japan", "Nepal", "Pakistan", "Russia", "Australia",
            "Dubai", "Saudi Arabia", "Qatar", "Afghanistan", "Bangladesh", "Srilanka", "Africa",
            "Germany", "NewZealand", "Portugle", "Bahrain", "Belgium", "Bhutan", "Brazil",
            "Colombia", "Cyprus", "Egypt"
        )

        arrayAdapter = ArrayAdapter(this, android.R.layout.simple_list_item_1, arrayList)
        listView.adapter = arrayAdapter

        searchView.setOnQueryTextListener(object : SearchView.OnQueryTextListener {
            override fun onQueryTextSubmit(query: String?): Boolean {
                return false
            }

            override fun onQueryTextChange(newText: String?): Boolean {
                arrayAdapter.filter.filter(newText)
                return false
            }
        })
    }
}