How to get current postal code from Network provider in android?

This example demonstrates about How to get the current postal code from Network provider in android.

Step 1 − Create a new project in Android Studio, go to File ⇒ New Project and fill all required details to create a new project.

Step 2 − Add the following code to res/layout/activity_main.xml.

In the above code, we have taken a text view to show postal code information.

Step 3 − Add the following code to src/MainActivity.java

package com.example.myapplication;

import android.Manifest;
import android.content.pm.PackageManager;
import android.location.Address;
import android.location.Geocoder;
import android.location.Location;
import android.location.LocationManager;
import android.os.Build;
import android.os.Bundle;
import android.support.annotation.RequiresApi;
import android.support.v4.app.ActivityCompat;
import android.support.v7.app.AppCompatActivity;
import android.widget.TextView;

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

public class MainActivity extends AppCompatActivity {
   TextView textView;
   Location location;
   double describeContents;
   List
 addresses;
   Geocoder geocoder;

   @RequiresApi(api = Build.VERSION_CODES.P)
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      textView = findViewById(R.id.text);
      LocationManager locationManager = (LocationManager) this.getSystemService(LOCATION_SERVICE);
      if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
         ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION}, 101);
      }
      location = locationManager
      .getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
      geocoder= new Geocoder(this);
   }

   @RequiresApi(api = Build.VERSION_CODES.O)
   @Override
   public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) {
      switch (requestCode) {
         case 101:
            if (grantResults[0] == PackageManager.PERMISSION_GRANTED) {
               if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
                  return;
               }
               try {
                  addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 10);
                  Address address = addresses.get(0);
                  textView.setText("" + address.getPostalCode());
               } catch (IOException e) {
                  e.printStackTrace();
               }
            } else {
               //not granted
            }
            break;
            default:
               super.onRequestPermissionsResult(requestCode, permissions, grantResults);
      }
   }

   @RequiresApi(api = Build.VERSION_CODES.O)
   @Override
   protected void onResume() {
      super.onResume();
      if (ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED && ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
         return;
      }
      try {
         addresses = geocoder.getFromLocation(location.getLatitude(), location.getLongitude(), 10);
         Address address = addresses.get(0);
         textView.setText("" + address.getPostalCode());
      } catch (IOException e) {
         e.printStackTrace();
      }
   }
}

Step 4 − Add the following code to AndroidManifest.xml

Let's try to run your application. I assume you have connected your actual Android Mobile device with your computer. To run the app from the android studio, open one of your project's activity files and click the Run  icon from the toolbar. Select your mobile device as an option and then check your mobile device which will display your default screen −

Click here to download the project code