এই উদাহরণটি দেখায় কিভাবে অ্যান্ড্রয়েডে ইউজারের বর্তমান লোকেশন সবচেয়ে সহজ উপায়ে পাওয়া যায়।
ধাপ ১: নতুন প্রজেক্ট তৈরি করুন
Android Studio-তে File → New Project এ যান এবং প্রজেক্ট তৈরি করার জন্য সকল প্রয়োজনীয় তথ্য পূরণ করুন।
ধাপ ২: লেআউট XML ফাইল যোগ করুন
res/layout/activity_main.xml ফাইলে নিচের কোডটি যোগ করুন।
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="https://schemas.android.com/apk/res/android"
xmlns:tools="https://schemas.android.com/tools"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<TextView
android:layout_marginTop="20dp"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Get Current Location and City Name"
android:textAlignment="center"
android:layout_centerHorizontal="true"
android:textSize="20sp" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textView"
android:layout_centerInParent="true"
android:textSize="16sp"
android:textStyle="bold"/>
</RelativeLayout>
ধাপ ৩: Gradle-এ ডিপেন্ডেন্সি যোগ করুন
build.gradle ফাইলে নিচের ডিপেন্ডেন্সি যোগ করুন। Google Play Services Location লাইব্রেরি ব্যবহার করা হয়েছে।
implementation 'com.google.android.gms:play-services-location:17.0.0'
ধাপ ৪: MainActivity.java ফাইলে কোড যোগ করুন
src/MainActivity.java ফাইলে নিচের কোডটি যোগ করুন। FusedLocationProviderClient, LocationCallback এবং IntentService ব্যবহার করে লোকেশন এবং অ্যাড্রেস পাওয়া হয়েছে।
import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import android.Manifest;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.location.Geocoder;
import android.location.Location;
import android.os.Bundle;
import android.os.Handler;
import android.os.ResultReceiver;
import android.util.Log;
import android.widget.TextView;
import android.widget.Toast;
import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationCallback;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationResult;
import com.google.android.gms.location.LocationServices;
public class MainActivity extends AppCompatActivity {
private FusedLocationProviderClient fusedLocationClient;
private static final int LOCATION_PERMISSION_REQUEST_CODE = 2;
private LocationAddressResultReceiver addressResultReceiver;
private TextView currentAddTv;
private Location currentLocation;
private LocationCallback locationCallback;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
addressResultReceiver = new LocationAddressResultReceiver(new Handler());
currentAddTv = findViewById(R.id.textView);
fusedLocationClient = LocationServices.getFusedLocationProviderClient(this);
locationCallback = new LocationCallback() {
@Override
public void onLocationResult(LocationResult locationResult) {
currentLocation = locationResult.getLocations().get(0);
getAddress();
}
};
startLocationUpdates();
}
@SuppressWarnings("MissingPermission")
private void startLocationUpdates() {
if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION}, LOCATION_PERMISSION_REQUEST_CODE);
} else {
LocationRequest locationRequest = new LocationRequest();
locationRequest.setInterval(2000);
locationRequest.setFastestInterval(1000);
locationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
fusedLocationClient.requestLocationUpdates(locationRequest, locationCallback, null);
}
}
@SuppressWarnings("MissingPermission")
private void getAddress() {
if (!Geocoder.isPresent()) {
Toast.makeText(MainActivity.this, "Can't find current address, ", Toast.LENGTH_SHORT).show();
return;
}
Intent intent = new Intent(this, GetAddressIntentService.class);
intent.putExtra("add_receiver", addressResultReceiver);
intent.putExtra("add_location", currentLocation);
startService(intent);
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
if (requestCode == LOCATION_PERMISSION_REQUEST_CODE) {
if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
startLocationUpdates();
} else {
Toast.makeText(this, "Location permission not granted, " + "restart the app if you want the feature", Toast.LENGTH_SHORT).show();
}
}
}
private class LocationAddressResultReceiver extends ResultReceiver {
LocationAddressResultReceiver(Handler handler) {
super(handler);
}
@Override
protected void onReceiveResult(int resultCode, Bundle resultData) {
if (resultCode == 0) {
Log.d("Address", "Location null retrying");
getAddress();
}
if (resultCode == 1) {
Toast.makeText(MainActivity.this, "Address not found, ", Toast.LENGTH_SHORT).show();
}
String currentAdd = resultData.getString("address_result");
showResults(currentAdd);
}
}
private void showResults(String currentAdd) {
currentAddTv.setText(currentAdd);
}
@Override
protected void onResume() {
super.onResume();
startLocationUpdates();
}
@Override
protected void onPause() {
super.onPause();
fusedLocationClient.removeLocationUpdates(locationCallback);
}
}
ধাপ ৫: GetAddressIntentService.java ক্লাস তৈরি করুন
নতুন একটি জাভা ক্লাস GetAddressIntentService.java তৈরি করে নিচের কোডটি যোগ করুন। এটি ব্যাকগ্রাউন্ডে Geocoder ব্যবহার করে লোকেশন থেকে অ্যাড্রেস বের করে।
package app.com.sample;
import android.app.IntentService;
import android.content.Intent;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.os.Bundle;
import android.os.ResultReceiver;
import android.util.Log;
import java.util.List;
import java.util.Locale;
import java.util.Objects;
import androidx.annotation.Nullable;
public class GetAddressIntentService extends IntentService {
private static final String IDENTIFIER = "GetAddressIntentService";
private ResultReceiver addressResultReceiver;
public GetAddressIntentService() {
super(IDENTIFIER);
}
@Override
protected void onHandleIntent(@Nullable Intent intent) {
String msg;
addressResultReceiver = Objects.requireNonNull(intent).getParcelableExtra("add_receiver");
if (addressResultReceiver == null) {
Log.e("GetAddressIntentService", "No receiver, not processing the request further");
return;
}
Location location = intent.getParcelableExtra("add_location");
if (location == null) {
msg = "No location, can't go further without location";
sendResultsToReceiver(0, msg);
return;
}
Geocoder geocoder = new Geocoder(this, Locale.getDefault());
List addresses = null;
try {
addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 1);
} catch (Exception ioException) {
Log.e("", "Error in getting address for the location");
}
if (addresses == null || addresses.size() == 0) {
msg = "No address found for the location";
sendResultsToReceiver(1, msg);
} else {
Address address = addresses.get(0);
String addressDetails = address.getFeatureName() + "\n" + address.getThoroughfare() + "\n" +
"Locality: " + address.getLocality() + "\n" + "County: " + address.getSubAdminArea() + "\n" +
"State: " + address.getAdminArea() + "\n" + "Country: " + address.getCountryName() + "\n" +
"Postal Code: " + address.getPostalCode() + "\n";
sendResultsToReceiver(2, addressDetails);
}
}
private void sendResultsToReceiver(int resultCode, String message) {
Bundle bundle = new Bundle();
bundle.putString("address_result", message);
addressResultReceiver.send(resultCode, bundle);
}
}
ধাপ ৬: AndroidManifest.xml-এ সার্ভিস এবং অনুমতি যোগ করুন
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="https://schemas.android.com/apk/res/android"
package="app.com.sample">
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<service android:name=".GetAddressIntentService" />
</application>
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
</manifest>
অ্যাপ্লিকেশন চালান
আপনার অ্যান্ড্রয়েড মোবাইল ডিভাইস কম্পিউটারের সাথে সংযুক্ত আছে ধরে নেওয়া হয়েছে। Android Studio-তে আপনার প্রজেক্টের যেকোনো এক্টিভিটি ফাইল খুলুন এবং টুলবার থেকে Run আইকনে ক্লিক করুন। আপনার মোবাইল ডিভাইস সিলেক্ট করুন এবং ডিভাইসে ডিফল্ট স্ক্রিন দেখুন।
