How to Get Address From Coordinates in Flutter?
Google Maps is of the most used application nowadays for navigation. Sometimes we don’t know the actual address so we search the location from coordinates such as Longitude and Latitude. In this article, we are going to see how to get the actual Address of the Actual location by passing the coordinates in Flutter.
Step By Step Implementation
Step 1: Create a New Project in Android Studio
To set up Flutter Development on Android Studio please refer to Android Studio Setup for Flutter Development, and then create a new project in Android Studio please refer to Creating a Simple Application in Flutter.
Step 2: Generating API Key for Using Google Maps
Check out the below article on How to generate an API key for using Google Maps. After developing that key we have to use it within our project to integrate Google Maps.
Now, follow the Steps to Implement Google Maps in the Flutter Application
Step 3: Adding Dependency to pubspec.yaml File
dependencies: flutter: google_maps_flutter: ^2.1.8
Now click on pub.get to configure.
Step 4: Update build.gradle File
Navigate to android>app>build.gradle file and update code on below line.
Change Compile SDK Version
android { compileSdkVersion 31 compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 }
Change Min SDK Version
defaultConfig { // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html). applicationId "com.example.google_maps" minSdkVersion 20 targetSdkVersion 30 versionCode flutterVersionCode.toInteger() versionName flutterVersionName }
Step 5: Add API Key to Android Manifest File
Navigate to android > app > src > main > AndrodManifest.xml file and add the below code in the manifest tag. Make sure to add your Google Maps API key in the value.
<meta-data android:name="com.google.android.geo.API_KEY" android:value="Enter your API key here"/>
Step 6: Working with main.dart File
Navigate to lib > main.dart file and add the below code to it. Comments are added in the code to get to know in detail.
Dart
import 'package:flutter/material.dart' ; import 'package:google_maps/Convert_Lat_Long.dart' ; void main() { runApp( const MyApp()); } class MyApp extends StatelessWidget { const MyApp({Key? key}) : super(key: key); // This widget is the root of your application. @override Widget build(BuildContext context) { return MaterialApp( // on below line we are specifying title of our app title: 'GFG' , // on below line we are hiding debug banner debugShowCheckedModeBanner: false , theme: ThemeData( // on below line we are specifying theme primarySwatch: Colors.green, ), // First screen of our app home: const Convert_Lat_Long(), ); } } |
Step 7: Creating a new Dart File for Convert_Lat_Long File
Navigate to lib > Right click on it > New > Dart File and name it as Convert_Lat_Long.dart. After creating that file add the below code to it. Comments are added in the code to get to know in detail.
Dart
import 'package:flutter/material.dart' ; import 'package:flutter_geocoder/geocoder.dart' ; class Convert_Lat_Long extends StatefulWidget { const Convert_Lat_Long({Key? key}) : super(key: key); @override _Convert_Lat_LongState createState() => _Convert_Lat_LongState(); } class _Convert_Lat_LongState extends State<Convert_Lat_Long> { // on below line we have created controllers for accessing values from textfield TextEditingController latitudeController = new TextEditingController(); TextEditingController longitudeController = new TextEditingController(); // variable created to store the address String stAddress = '' ; @override Widget build(BuildContext context) { return Scaffold( appBar: AppBar( // on below line we have given title of App title: Text( 'GFG' ), ), body: Padding( padding: const EdgeInsets.all(8.0), child: SingleChildScrollView( child: Column( crossAxisAlignment: CrossAxisAlignment.center, children: [ Text( 'Get Address from Coordinates' , style: TextStyle(color: Color(0xFF0F9D58), fontWeight: FontWeight.bold, fontSize: 20),), SizedBox(height: 10), // textfield1 for taking input as latitude TextField( controller: latitudeController, decoration: InputDecoration( // Given Hint Text hintText: 'Latitude' , border: OutlineInputBorder( // Given border to textfield borderRadius: BorderRadius.circular(10), ) ), ), SizedBox(height: 10), // textfield2 for taking input as longitude TextField( controller: longitudeController, decoration: InputDecoration( // Given hint text hintText: 'Longitude' , border: OutlineInputBorder( // given border to textfield borderRadius: BorderRadius.circular(10), ) ), ), SizedBox(height: 10), // Given padding to the Container Padding( padding: const EdgeInsets.all(15.0), child: Container( child: Center(child: Text(stAddress),), ), ), SizedBox(height: 10), GestureDetector( onTap: () async { // stored the value of latitude in lat from textfield String lat = latitudeController.text; // stored the value of longitude in lon from textfield String lon = longitudeController.text; // converted the lat from string to double double lat_data = double .parse(lat); // converted the lon from string to double double lon_data = double .parse(lon); // Passed the coordinates of latitude and longitude final coordinates = new Coordinates(lat_data, lon_data); var address = await Geocoder.local.findAddressesFromCoordinates(coordinates); var first = address.first; // on below line we have set the address to string setState(() { stAddress = first.addressLine.toString(); }); }, child: Padding( padding: const EdgeInsets.all(8.0), child: Container( decoration: BoxDecoration( // specified color for button color: Colors.green, ), // given height for button height: 50, child: Center( // on below line we have given button name child: Text( 'Convert' ,style: TextStyle(color: Colors.white),), ), ), ), ), ], ), ), ), ); } } |