Android geolocation permissions

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Location will be shown here!"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        android:id="@+id/textview"
        />

    <Button
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintTop_toTopOf="@+id/textview"
        android:text="Get location"
        android:id="@+id/btn"
        />

</androidx.constraintlayout.widget.ConstraintLayout>

MainActivity.java

package com.example.myapplication;

import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.net.Uri;
import android.os.Bundle;
import android.provider.Settings;
import android.widget.Button;
import android.widget.TextView;

import androidx.activity.EdgeToEdge;
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationServices;

public class MainActivity extends AppCompatActivity {

    private FusedLocationProviderClient client;
    private TextView text;
    private static final int LOCATION_PERMISSION_REQUEST = 1001;

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

        text = findViewById(R.id.textview);
        Button btn = (Button) findViewById(R.id.btn);

        client = LocationServices.getFusedLocationProviderClient(this);
        btn.setOnClickListener(v -> getCurrentLocation());
    }

    private void getCurrentLocation() {

        if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
            ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, LOCATION_PERMISSION_REQUEST);
            return;
        }

        client.getLastLocation().addOnSuccessListener(location -> {
            if (location != null) {
                double lat = location.getLatitude();
                double lon = location.getLongitude();

                text.setText("Latitude: " + lat + "\nLongitude: " + lon);
            } else {
                text.setText("Unable to get location");
            }
        });
    }

    // Handle the result of the permission request
    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);

        // Permission denied
        if (requestCode == LOCATION_PERMISSION_REQUEST && grantResults.length > 0 &&
        grantResults[0] == PackageManager.PERMISSION_DENIED) {

            text.setText("Location permission denied, please enable it in the settings");

            // Denied permanently, prompt settings to user
            if (!ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION)) {
                Button btn = (Button) findViewById(R.id.btn);
                btn.setOnClickListener(v -> {
                    var intent = new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
                    intent.setData(Uri.parse("package:" + getPackageName()));
                    startActivity(intent);
                });
            }
        } else {

            // pass
            getCurrentLocation();
        }
    }
}