<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout 
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <!--fragment to display our maps-->
    <fragment xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/map"
        android:name="com.google.android.gms.maps.SupportMapFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        tools:context=".MapsActivity" />

    <!--search view to search our location-->
    <androidx.appcompat.widget.SearchView
        android:id="@+id/idSearchView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_margin="10dp"
        android:background="#BFBFBF"
        android:elevation="5dp"
        app:iconifiedByDefault="false"
        app:queryHint="Search Here" />

</RelativeLayout>

import android.location.Address;
import android.location.Geocoder;
import android.os.Bundle;

import androidx.appcompat.widget.SearchView;
import androidx.fragment.app.FragmentActivity;

import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.MarkerOptions;

import java.io.IOException;
import java.util.List;

public class MapsActivity extends FragmentActivity implements OnMapReadyCallback {

    private GoogleMap mMap;

    // creating a variable 
    // for search view.
    SearchView searchView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_maps);

        // initializing our search view.
        searchView = findViewById(R.id.idSearchView);

        // Obtain the SupportMapFragment and get notified 
        // when the map is ready to be used.
        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager().findFragmentById(R.id.map);

        // adding on query listener for our search view.
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                // on below line we are getting the 
                // location name from search view.
                String location = searchView.getQuery().toString();

                // below line is to create a list of address
                // where we will store the list of all address.
                List<Address> addressList = null;

                // checking if the entered location is null or not.
                if (location != null || location.equals("")) {
                    // on below line we are creating and initializing a geo coder.
                    Geocoder geocoder = new Geocoder(MapsActivity.this);
                    try {
                        // on below line we are getting location from the 
                        // location name and adding that location to address list.
                        addressList = geocoder.getFromLocationName(location, 1);
                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    // on below line we are getting the location 
                    // from our list a first position.
                    Address address = addressList.get(0);

                    // on below line we are creating a variable for our location
                    // where we will add our locations latitude and longitude.
                    LatLng latLng = new LatLng(address.getLatitude(), address.getLongitude());

                    // on below line we are adding marker to that position.
                    mMap.addMarker(new MarkerOptions().position(latLng).title(location));

                    // below line is to animate camera to that position.
                    mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(latLng, 10));
                }
                return false;
            }

            @Override
            public boolean onQueryTextChange(String newText) {
                return false;
            }
        });
        // at last we calling our map fragment to update.
        mapFragment.getMapAsync(this);
    }

    @Override
    public void onMapReady(GoogleMap googleMap) {
        mMap = googleMap;
    }
}