Where am I ? Location Based Services @FusedLocationProviderClient

 "Jai Sarawati Maa"

Location Based Services 

The location APIs available in Google Play services facilitate adding location awareness to your app with automated location tracking, wrong-side-of-the-street detection, geofencing, and activity recognition. 

The API updates your app periodically with the best available location, based on the currently-available location providers such as WiFi and GPS (Global Positioning System). 

I am uploading how to find out your current location and address by using FusedLocationProviderClient. Which is the best way to deal with location based activities.  

Step-I: Open Android SDK Manager and check either Google Play Services Installed or not. if not please install google play services. See the below pic. 

  

Step-II: After installation kindly add below dependencies in module level gradle file. 

implementation 'com.google.android.gms:play-services-location:18.0.0'

Step-III: Add meta data in between application tag and required permission in Manifest file.

<meta-data
    android:name="com.google.android.gms.version"
    android:value="@integer/google_play_services_version"/>

<uses-permission android:name="android.permission.
                              ACCESS_FINE_LOCATION"/>
Step-IV: Your output will be like. 





See the code of MainActivity
package com.example.locationbasedservices2021;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import android.Manifest; 
import android.content.pm.PackageManager;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import java.io.IOException;
import java.util.List;
import java.util.Locale;
public class MainActivity extends AppCompatActivity
{
    final int REQUEST_CODE_LOCATION=123;
    int locationRequestCode;
    TextView lat_text,long_text,add_text;
    FusedLocationProviderClient fusedLocationClient;
    double lat, longi;
    String addres;
    Button button;
    Boolean flag = false;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    lat_text =  findViewById(R.id.textLat);
    long_text = findViewById(R.id.textLong);
    add_text =  findViewById(R.id.textCity);
    button = findViewById(R.id.btn_location);
    fusedLocationClient = LocationServices.
            getFusedLocationProviderClient(this);

    locationRequestCode =
            ContextCompat.checkSelfPermission(MainActivity.this,
                    Manifest.permission.ACCESS_FINE_LOCATION);
 button.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if(flag)
            {
              finLoc();
             
            }
        }
    });
}

@Override
protected void onStart() {
    super.onStart();

    if(locationRequestCode == PackageManager.PERMISSION_GRANTED)
    {
        Toast.makeText(this,"Permission Already Given ",
                        Toast.LENGTH_LONG).show();
        flag = true;
    }
    else
    {
        askforPermission();
    }
}
private void askforPermission() {

    if(locationRequestCode != PackageManager.PERMISSION_GRANTED)
    {
      if(!ActivityCompat.shouldShowRequestPermissionRationale
      (MainActivity.this,Manifest.permission.ACCESS_FINE_LOCATION))
        {
            ActivityCompat.requestPermissions(MainActivity.this,
            new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                    REQUEST_CODE_LOCATION);
            return;
        }
        else
        {
            ActivityCompat.requestPermissions(MainActivity.this,
            new String[]{Manifest.permission.ACCESS_FINE_LOCATION},
                    REQUEST_CODE_LOCATION);
        }
    }
}
@Override
public void onRequestPermissionsResult(int requestCode,
        String[] permissions,int[] grantResults) {
    super.onRequestPermissionsResult(requestCode, permissions, 
            grantResults);
    if(requestCode == REQUEST_CODE_LOCATION)
    {
        if(grantResults.length>0 && grantResults[0] == 
                    PackageManager.PERMISSION_GRANTED)
        {
            Toast.makeText(this,"Permission Granted",
                                Toast.LENGTH_LONG).show();
            flag = true;
            finLoc();
        }
    }
}
private void finLoc() {

    fusedLocationClient.getLastLocation().addOnCompleteListener
                (new OnCompleteListener<Location>() {
        @Override
        public void onComplete(Task<Location> task) {

            Location location = task.getResult();
            if(location!=null)
            {
                Geocoder geocoder = new Geocoder(MainActivity.this,
                                 Locale.getDefault());
                try {
                  List<Address> address = geocoder.getFromLocation
                                        (location.getLatitude(),
                                        location.getLongitude(),1);
                    lat = location.getLatitude();
                    longi = location.getLongitude();
                    lat_text.setText("Latitide: " + lat);
                    long_text.setText("Longitude: " + longi);

                    StringBuilder sb = new StringBuilder();
                    if (address.size() > 0) {
                        Address addr = address.get(0);
             for (int i = 0; i < addr.getMaxAddressLineIndex(); i++)
                    sb.append(addr.getAddressLine(i)).append("\n");
                    sb.append(addr.getLocality()).append("\n");
                    sb.append(addr.getPostalCode()).append("\n");
                    sb.append(addr.getCountryName());
                    }
                    addres = sb.toString();

                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            add_text.setText("Address:"+addres);
        }
    });
   }
}

// Layout File 
<?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"
    tools:context=".MainActivity"
    android:orientation="vertical">

    <Button
        android:id="@+id/btn_location"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="120dp"
        android:layout_marginTop="100dp"
        android:text="Find Location" />

    <TextView
        android:id="@+id/textLat"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Lattitude"
        android:textSize="30dp"
        android:layout_marginLeft="60dp"
        android:layout_marginTop="20dp"/>
    <TextView
        android:id="@+id/textLong"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Longitude "
        android:textSize="30dp"
        android:layout_marginLeft="60dp"
        android:layout_marginTop="20dp"/>

    <TextView
        android:id="@+id/textCity"
        android:layout_width="250dp"
        android:layout_height="wrap_content"
        android:layout_marginLeft="60dp"
        android:layout_marginTop="20dp"
        android:text="City"
        android:textSize="30dp" />

</LinearLayout>