如何在Android Studio中显示半径内2个标记的显示距离

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

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.Marker;
import com.google.android.gms.maps.model.MarkerOptions;

public class MainActivity extends AppCompatActivity implements OnMapReadyCallback {

    private GoogleMap mMap;
    private Marker marker1, marker2;
    private TextView distanceTextView;

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

        distanceTextView = findViewById(R.id.distanceTextView);

        SupportMapFragment mapFragment = (SupportMapFragment) getSupportFragmentManager()
                .findFragmentById(R.id.map);
        mapFragment.getMapAsync(this);
    }

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

        // 设置地图类型为普通地图
        mMap.setMapType(GoogleMap.MAP_TYPE_NORMAL);

        // 设置缩放级别
        mMap.moveCamera(CameraUpdateFactory.zoomTo(15));

        // 创建标记对象并设置经纬度
        LatLng location1 = new LatLng(40.7128, -74.0060);
        LatLng location2 = new LatLng(34.0522, -118.2437);

        marker1 = mMap.addMarker(new MarkerOptions().position(location1).title("Marker 1"));
        marker2 = mMap.addMarker(new MarkerOptions().position(location2).title("Marker 2"));

        // 计算两个位置点之间的距离
        float[] results = new float[1];
        Location.distanceBetween(location1.latitude, location1.longitude,
                location2.latitude, location2.longitude, results);
        float distance = results[0];

        // 将距离显示在界面上
        distanceTextView.setText("Distance: " + distance + " meters");
    }
}