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How can I find the latitude and longitude from address on Android using Kotlin?
This example demonstrates how to find the latitude and longitude from address on Android using 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="8dp" tools:context=".MainActivity"> <TextView android:id="@+id/textViewAddress" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentStart="true" android:text="Enter Address: " android:textAppearance="?android:attr/textAppearanceMedium" android:textStyle="bold" /> <EditText android:id="@+id/editTextAddress" android:layout_width="fill_parent" android:layout_height="wrap_content" android:layout_alignParentTop="true" android:layout_toEndOf="@+id/textViewAddress" android:singleLine="true" android:text="" /> <Button android:id="@+id/addressButton" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textViewAddress" android:layout_marginTop="50dp" android:layout_toEndOf="@+id/textViewAddress" android:text="Show Lat/Long" /> <TextView android:id="@+id/latLongTV" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerVertical="true" android:layout_toEndOf="@+id/textViewAddress" android:text="" android:textAppearance="?android:attr/textAppearanceLarge" android:textColor="@android:color/background_dark" /> </RelativeLayout>
Step 3 − Add the following code to src/MainActivity.kt
import android.os.Bundle import android.os.Handler import android.os.Message import android.widget.Button import android.widget.EditText import android.widget.TextView import androidx.appcompat.app.AppCompatActivity class MainActivity : AppCompatActivity() { private lateinit var addressButton: Button private lateinit var textViewAddress: TextView lateinit var textViewLatLong: TextView override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) title = "KotlinApp" textViewAddress = findViewById(R.id.textViewAddress) textViewLatLong = findViewById(R.id.latLongTV) addressButton = findViewById(R.id.addressButton) addressButton.setOnClickListener { val editText = findViewById<EditText>(R.id.editTextAddress) val address = editText.text.toString() val locationAddress = GeoCodingLocation() locationAddress.getAddressFromLocation(address, applicationContext, GeoCoderHandler(this)) } } companion object { private class GeoCoderHandler(private val mainActivity: MainActivity) : Handler() { override fun handleMessage(message: Message) { val locationAddress: String? locationAddress = when (message.what) { 1 -> { val bundle = message.data bundle.getString("address") } else -> null } mainActivity.textViewLatLong.text = locationAddress } } } }
Step 4 − Create a new Kotlin class and add the following code in GeoCodingLocation.kt
import android.content.Context import android.location.Address 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 GeoCodingLocation { private val TAG = "GeoCodeLocation" fun getAddressFromLocation( locationAddress: String, context: Context, handler: Handler ) { val thread = object : Thread() { override fun run() { val geoCoder = Geocoder( context, Locale.getDefault() ) var result: String? = null try { val addressList = geoCoder.getFromLocationName(locationAddress, 1) if (addressList != null && addressList.size > 0) { val address = addressList.get(0) as Address val sb = StringBuilder() sb.append(address.latitude).append("
") sb.append(address.longitude).append("
") result = sb.toString() } } catch (e: IOException) { Log.e(TAG, "Unable to connect to GeoCoder", e) } finally { val message = Message.obtain() message.target = handler message.what = 1 val bundle = Bundle() result = ("Address: $locationAddress" + "
Latitude and Longitude:
" + result) bundle.putString("address", result) message.data = bundle message.sendToTarget() } } } thread.start() } }
Step 5 − 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
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