How to get a complete address from latitude and longitude on Android Kotlin?

Kotlin Apps/ApplicationsMobile DevelopmentAndroid

This example demonstrates how to get a complete address from latitude and longitude on Android Kotlin?

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.

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:tools="http://schemas.android.com/tools"
   android:layout_width="match_parent"
   android:layout_height="match_parent"
   android:padding="16sp"
   tools:context=".MainActivity">
   <TextView
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerHorizontal="true"
      android:layout_marginTop="50dp"
      android:text="Tutorials Point"
      android:textAlignment="center"
      android:textColor="@android:color/holo_green_dark"
      android:textSize="32sp"
      android:textStyle="bold" />
   <Button
      android:id="@+id/btnShowAddress"
      android:layout_width="wrap_content"
      android:layout_height="wrap_content"
      android:layout_centerInParent="true"
      android:text="Show Address" />
   <TextView
      android:id="@+id/tvAddress"
      android:layout_width="fill_parent"
      android:layout_height="wrap_content"
      android:layout_below="@id/btnShowAddress"
      android:layout_centerInParent="true"
      android:textColor="@android:color/background_dark"
      android:textSize="12sp"
      android:textStyle="bold" />
</RelativeLayout>

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

import android.content.Intent
import android.content.pm.PackageManager
import android.location.Location
import android.location.LocationManager
import android.os.Bundle
import android.os.Handler
import android.os.Message
import android.provider.Settings
import android.widget.Button
import android.widget.TextView
import android.widget.Toast
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity
import androidx.core.app.ActivityCompat
import androidx.core.content.ContextCompat
class MainActivity : AppCompatActivity() {
   lateinit var btnShowAddress: Button
   lateinit var tvAddress: TextView
   lateinit var location: Location
   lateinit var appLocationService: AppLocationService
   override fun onCreate(savedInstanceState: Bundle?) {
      super.onCreate(savedInstanceState)
      setContentView(R.layout.activity_main)
      title = "KotlinApp"
      tvAddress = findViewById(R.id.tvAddress)
      appLocationService = AppLocationService(this)
      btnShowAddress = findViewById(R.id.btnShowAddress)
      if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION) != PackageManager.PERMISSION_GRANTED) {
         if (ActivityCompat.shouldShowRequestPermissionRationale(this, Manifest.permission.ACCESS_FINE_LOCATION)) {
            ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.ACCESS_FINE_LOCATION), 1);
         } else {
            ActivityCompat.requestPermissions(this, arrayOf(Manifest.permission.ACCESS_FINE_LOCATION), 1);
         }
      }
      btnShowAddress.setOnClickListener {
         location = appLocationService.getLocation(LocationManager.GPS_PROVIDER)!!
         val latitude = 13.1000727
         val longitude = 80.2126274
         val locationAddress = LocationAddress()
         locationAddress.getAddressFromLocation(
            latitude, longitude, applicationContext, GeoCodeHandler()
         )
         showSettingsAlert()
      }
   }
   private fun showSettingsAlert() {
      val alertDialog = AlertDialog.Builder(this)
      alertDialog.setTitle("SETTINGS")
      alertDialog.setMessage("Enable Location Provider! Go to settings menu?")
      alertDialog.setPositiveButton("Settings") { _, _ ->
         val intent = Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS)
         this@MainActivity.startActivity(intent)
      }
      alertDialog.setNegativeButton("Cancel") { dialog, _ -> dialog.cancel() }
      alertDialog.show()
   }
   internal inner class GeoCodeHandler : Handler() {
      override fun handleMessage(message: Message) {
         val locationAddress: String
         locationAddress = when (message.what) {
            1 -> {
               val bundle = message.data
               bundle.getString("address")
            }
            else -> null.toString()
         }
         tvAddress.text = locationAddress
      }
   }
   override fun onRequestPermissionsResult(
      requestCode: Int,
      permissions: Array<out String>,
      grantResults: IntArray
   ) {
      when (requestCode) {
         1 -> {
            if (grantResults.isNotEmpty() && grantResults[0] ===
            PackageManager.PERMISSION_GRANTED) {
               if ((ContextCompat.checkSelfPermission(
                  this@MainActivity,
                  Manifest.permission.ACCESS_FINE_LOCATION
               ) === PackageManager.PERMISSION_GRANTED)
               ) {
                  Toast.makeText(this, "Permission Granted", Toast.LENGTH_SHORT).show()
               }
            } else {
               Toast.makeText(this, "Permission Denied", Toast.LENGTH_SHORT).show()
            }
            return
         }
      }
   }
}

Step 4 − Create a kotlin class and add the following code in AppLocationService.kt

Example

import android.annotation.SuppressLint
import android.app.Service
import android.content.Context
import android.content.Intent
import android.location.Location
import android.location.LocationListener
import android.location.LocationManager
import android.os.Bundle
import android.os.IBinder
open class AppLocationService(context: Context) : Service(),
LocationListener {
   private var locationManager: LocationManager? =
   context.getSystemService(Context.LOCATION_SERVICE) as LocationManager
   private lateinit var location: Location
   @SuppressLint("MissingPermission")
   fun getLocation(provider: String?): Location? {
      if (locationManager!!.isProviderEnabled(provider)) {
         locationManager!!.requestLocationUpdates(
         provider,
         MIN_TIME_FOR_UPDATE,
         MIN_DISTANCE_FOR_UPDATE.toFloat(), this
         )
         if (locationManager != null) {
            location = locationManager!!.getLastKnownLocation(provider)
            return location
         }
      }
      return null
   }
   override fun onLocationChanged(location: Location) {}
   override fun onProviderDisabled(provider: String) {}
   override fun onProviderEnabled(provider: String) {}
   override fun onStatusChanged(
   provider: String,
   status: Int,
   extras: Bundle
   ) {
   }
   override fun onBind(arg0: Intent): IBinder? {
      return null
   }
   companion object {
      private const val MIN_DISTANCE_FOR_UPDATE: Long = 10
      private const val MIN_TIME_FOR_UPDATE = 1000 * 60 * 2.toLong()
   }
}

Step 5 − Create a kotlin class and add the following code in LocationAddress.kt

Example

import android.content.Context
import android.location.Geocoder
import android.os.Bundle
import android.os.Handler
import android.os.Message
import android.util.Log
import java.io.IOException
import java.util.*
class LocationAddress {
   private val tag = "LocationAddress"
   fun getAddressFromLocation(
   latitude: Double,
   longitude: Double, context: Context, handler: Handler
   ) {
      val thread = object : Thread() {
         override fun run() {
            val geoCoder = Geocoder(
            context,
            Locale.getDefault()
            )
            var result: String = null.toString()
            try {
               val addressList = geoCoder.getFromLocation(
               latitude, longitude, 1
               )
               if ((addressList != null && addressList.size > 0)) {
                  val address = addressList.get(0)
                  val sb = StringBuilder()
                  for (i in 0 until address.maxAddressLineIndex) {
                     sb.append(address.getAddressLine(i)).append("\n")
                  }
                  sb.append(address.locality).append("\n")
                  sb.append(address.postalCode).append("\n")
                  sb.append(address.countryName)
                  result = sb.toString()
               }
            } catch (e: IOException) {
               Log.e(tag, "Unable connect to GeoCoder", e)
            } finally {
               val message = Message.obtain()
               message.target = handler
               message.what = 1
               val bundle = Bundle()
               result = ("Latitude: " + latitude + " Longitude: " + longitude +
               "\n\nAddress:\n" + result)
               bundle.putString("address", result)
               message.data = bundle
               message.sendToTarget()
            }
         }
      }
      thread.start()
   }
}

Step 6 − Add the following code to androidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.com.q11">
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/>
   <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>
   </application>
</manifest>

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 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


raja
Published on 26-May-2020 11:46:24
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