Enter a name for your project and select a package name. Also, make sure the language is set to Kotlin. Click “Finish” to create the project.<\/li>\n<\/ol>\nAdding necessary dependencies<\/h2>\n
Open the build.gradle<\/code> file of your app module and add the following dependencies:<\/p>\nimplementation 'org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.2'\nimplementation 'com.squareup.okhttp3:okhttp:4.9.1'\nimplementation 'com.google.code.gson:gson:2.8.8'\nimplementation 'com.github.bumptech.glide:glide:4.12.0'\n<\/code><\/pre>\nOnce the dependencies are added, sync your project.<\/p>\n
Creating the Weather Service<\/h2>\n
Next, we will create a weather service that fetches weather data from the OpenWeatherMap API. Create a new Kotlin class called WeatherService<\/code> and add the following code:<\/p>\nimport okhttp3.OkHttpClient\nimport okhttp3.Request\nimport kotlinx.coroutines.Dispatchers\nimport kotlinx.coroutines.withContext\nimport com.google.gson.Gson\n\nclass WeatherService(private val apiKey: String) {\n\n private val client = OkHttpClient()\n\n suspend fun getWeather(city: String): WeatherData {\n val url = \"https:\/\/api.openweathermap.org\/data\/2.5\/weather?q=$city&appid=$apiKey\"\n val request = Request.Builder().url(url).build()\n\n return withContext(Dispatchers.IO) {\n val response = client.newCall(request).execute()\n val body = response.body()?.string()\n Gson().fromJson(body, WeatherData::class.java)\n }\n }\n}\n<\/code><\/pre>\nIn the getWeather<\/code> function, we use the OkHttpClient<\/code> to make a network request to the OpenWeatherMap API. The response is then converted into a WeatherData<\/code> object using Gson.<\/p>\nCreating the WeatherData model<\/h2>\n
Next, we will create a Kotlin data class called WeatherData<\/code> that represents the weather data returned by the API. Add the following code to the WeatherData.kt<\/code> file:<\/p>\ndata class WeatherData(\n val name: String,\n val main: MainData,\n val weather: List<Weather>\n)\n\ndata class MainData(\n val temp: Double,\n val humidity: Int\n)\n\ndata class Weather(\n val main: String,\n val description: String,\n val icon: String\n)\n<\/code><\/pre>\nThe WeatherData<\/code> class contains properties like the city name, temperature, humidity, and a list of weather conditions. The MainData<\/code> class represents the main weather data, and the Weather<\/code> class represents a single weather condition.<\/p>\nCreating the MainActivity layout<\/h2>\n
Open the activity_main.xml<\/code> layout file and replace the default code with the following:<\/p>\n<RelativeLayout xmlns_android=\"http:\/\/schemas.android.com\/apk\/res\/android\"\n xmlns_tools=\"http:\/\/schemas.android.com\/tools\"\n android_id=\"@+id\/container\"\n android_layout_width=\"match_parent\"\n android_layout_height=\"match_parent\"\n android_paddingBottom=\"@dimen\/activity_vertical_margin\"\n android_paddingLeft=\"@dimen\/activity_horizontal_margin\"\n android_paddingRight=\"@dimen\/activity_horizontal_margin\"\n android_paddingTop=\"@dimen\/activity_vertical_margin\"\n tools_context=\".MainActivity\">\n\n <EditText\n android_id=\"@+id\/cityEditText\"\n android_layout_width=\"match_parent\"\n android_layout_height=\"wrap_content\"\n android_hint=\"Enter city name\"\n android_imeOptions=\"actionSearch\"\n android_singleLine=\"true\" \/>\n\n <Button\n android_id=\"@+id\/fetchButton\"\n android_layout_width=\"wrap_content\"\n android_layout_height=\"wrap_content\"\n android_layout_below=\"@id\/cityEditText\"\n android_layout_centerHorizontal=\"true\"\n android_text=\"Fetch Weather\" \/>\n\n <TextView\n android_id=\"@+id\/weatherTextView\"\n android_layout_width=\"match_parent\"\n android_layout_height=\"wrap_content\"\n android_layout_below=\"@id\/fetchButton\"\n android_gravity=\"center\"\n android_textSize=\"24sp\" \/>\n\n <ImageView\n android_id=\"@+id\/weatherIconImageView\"\n android_layout_width=\"wrap_content\"\n android_layout_height=\"wrap_content\"\n android_layout_below=\"@id\/weatherTextView\"\n android_layout_centerHorizontal=\"true\"\n android_layout_marginTop=\"16dp\"\n android_contentDescription=\"Weather icon\" \/>\n\n<\/RelativeLayout>\n<\/code><\/pre>\nWe have added an EditText to enter the city name, a Button to fetch the weather, a TextView to display the weather information, and an ImageView to display the weather icon.<\/p>\n
Implementing the MainActivity logic<\/h2>\n
Open the MainActivity.kt<\/code> file and replace the default code with the following:<\/p>\nimport android.os.Bundle\nimport android.view.View\nimport android.widget.Button\nimport android.widget.EditText\nimport android.widget.ImageView\nimport android.widget.TextView\nimport androidx.appcompat.app.AppCompatActivity\nimport com.bumptech.glide.Glide\nimport kotlinx.coroutines.CoroutineScope\nimport kotlinx.coroutines.MainScope\nimport kotlinx.coroutines.launch\n\nclass MainActivity : AppCompatActivity(), CoroutineScope by MainScope() {\n\n private lateinit var weatherService: WeatherService\n private lateinit var cityEditText: EditText\n private lateinit var fetchButton: Button\n private lateinit var weatherTextView: TextView\n private lateinit var weatherIconImageView: ImageView\n\n override fun onCreate(savedInstanceState: Bundle?) {\n super.onCreate(savedInstanceState)\n setContentView(R.layout.activity_main)\n\n weatherService = WeatherService(\"YOUR_API_KEY\")\n cityEditText = findViewById(R.id.cityEditText)\n fetchButton = findViewById(R.id.fetchButton)\n weatherTextView = findViewById(R.id.weatherTextView)\n weatherIconImageView = findViewById(R.id.weatherIconImageView)\n\n fetchButton.setOnClickListener {\n val city = cityEditText.text.toString()\n if (city.isNotEmpty()) {\n fetchWeather(city)\n }\n }\n }\n\n private fun fetchWeather(city: String) {\n launch {\n try {\n val weatherData = weatherService.getWeather(city)\n val temperature = weatherData.main.temp.toString()\n val humidity = weatherData.main.humidity.toString()\n val weatherDescription = weatherData.weather.first().description\n val weatherIconUrl = \"https:\/\/openweathermap.org\/img\/w\/${weatherData.weather.first().icon}.png\"\n\n weatherTextView.text = \"Temperature: $temperature \u00b0CnHumidity: $humidity%n$weatherDescription\"\n Glide.with(this@MainActivity)\n .load(weatherIconUrl)\n .into(weatherIconImageView)\n } catch (e: Exception) {\n weatherTextView.text = \"Error fetching weather data\"\n weatherIconImageView.setImageDrawable(null)\n }\n }\n }\n}\n<\/code><\/pre>\nReplace 'YOUR_API_KEY'<\/code> with your actual OpenWeatherMap API key.<\/p>\nIn the fetchWeather<\/code> function, we make use of the weatherService<\/code> to fetch weather data for the specified city. We then update the UI with the temperature, humidity, weather description, and weather icon using the Glide library.<\/p>\nTesting the App<\/h2>\n
Connect your Android device or start an emulator, and click on the “Run” button in Android Studio to install and run the app. Enter a city name in the EditText and click the “Fetch Weather” button to see the weather data for that city.<\/p>\n
Conclusion<\/h2>\n
In this tutorial, we learned how to create a weather app using Kotlin and Android. We made use of the OpenWeatherMap API to fetch weather data and displayed it in a user-friendly format. You can further enhance this app by adding more features like a forecast for multiple days or a search history. Feel free to explore and experiment with different features to make the app more useful and interactive.<\/p>\n","protected":false},"excerpt":{"rendered":"
In this tutorial, we will learn how to create a weather app using Kotlin and the Android platform. The app will fetch weather data from an API and display it in a user-friendly format. Prerequisites Before getting started, make sure you have the following: Android Studio installed on your machine. Continue Reading<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[259,261,264,263,258,9,262,260,257],"yoast_head":"\nHow to Create a Weather App with Kotlin and Android - Pantherax Blogs<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/localhost:10003\/how-to-create-a-weather-app-with-kotlin-and-android\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to Create a Weather App with Kotlin and Android\" \/>\n<meta property=\"og:description\" content=\"In this tutorial, we will learn how to create a weather app using Kotlin and the Android platform. 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