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@ekzemplaro(内田 雅智)

Android Studio: 現在の天気情報取得アプリ

Last updated at Posted at 2023-10-18

こちらと同じことを行ってみました。
KotlinとRetrofitを使った初めてのAndroidアプリ開発

プロジェクトの作成

プロジェクト名: weather01

環境設定

manifests/AndroidManifest.xml
（省略）
<uses-permission android:name="android.permission.INTERNET" />
（省略）
app/build.gradle.kts
plugins {
    id("com.android.application")
    id("org.jetbrains.kotlin.android")
    id("com.google.android.libraries.mapsplatform.secrets-gradle-plugin")
}

android {
    namespace = "com.example.weather01"
    compileSdk = 34

    defaultConfig {
        applicationId = "com.example.weather01"
        minSdk = 24
        targetSdk = 34
        versionCode = 1
        versionName = "1.0"

        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            isMinifyEnabled = false
            proguardFiles(
                getDefaultProguardFile("proguard-android-optimize.txt"),
                "proguard-rules.pro"
            )
        }
    }
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }
    kotlinOptions {
        jvmTarget = "1.8"
    }
}

dependencies {

    implementation("androidx.core:core-ktx:1.9.0")
    implementation("androidx.appcompat:appcompat:1.6.1")
    implementation("com.google.android.material:material:1.10.0")
    implementation("androidx.constraintlayout:constraintlayout:2.1.4")

    testImplementation("junit:junit:4.13.2")
    androidTestImplementation("androidx.test.ext:junit:1.1.5")
    androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")

    // androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'

    // Retrofit
    val retrofit_version = "2.9.0"
    implementation("com.squareup.retrofit2:retrofit:$retrofit_version")
    implementation("com.squareup.retrofit2:converter-moshi:$retrofit_version")

    // Moshi
    val moshi_version = "1.14.0"
    implementation("com.squareup.moshi:moshi:$moshi_version")
    implementation("com.squareup.moshi:moshi-kotlin:$moshi_version")

    // Glide
    val glide_version = "4.16.0"
    implementation("com.github.bumptech.glide:glide:$glide_version")
    annotationProcessor("com.github.bumptech.glide:compiler:$glide_version")
}
build.gradle.kts
// Top-level build file where you can add configuration options common to all sub-projects/modules.
plugins {
    id("com.android.application") version "8.1.2" apply false
    id("org.jetbrains.kotlin.android") version "1.9.0" apply false

}

buildscript {
    dependencies {
        classpath("com.google.android.libraries.mapsplatform.secrets-gradle-plugin:secrets-gradle-plugin:2.0.1")
    }
}
res/values/strings.xml
<resources>
    <string name="app_name">weather01</string>
    <string name="post_button">送信</string>
    <string name="text_placeholder">CityName</string>
    <string name="text_temp">温度</string>
    <string name="description_weather_icon">Weather status icon</string>
</resources>
gradle.properties
（省略）
android.defaults.buildfeatures.buildconfig=true
android.nonFinalResIds=false
local.properties
（省略）
OWM_API_KEY="********"

画面

res/layout/activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <LinearLayout
        android:id="@+id/linearLayout"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center_horizontal"
        android:orientation="vertical"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <EditText
            android:id="@+id/cityName"
            android:layout_width="wrap_content"
            android:layout_height="48dp"
            android:autofillHints="no"
            android:ems="10"
            android:hint="@string/text_placeholder"
            android:inputType="text"
            tools:ignore="SpeakableTextPresentCheck,SpeakableTextPresentCheck,TextContrastCheck" />

        <Button
            android:id="@+id/postButton"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/post_button" />
    </LinearLayout>

    <LinearLayout
        android:id="@+id/linearLayout2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        app:layout_constraintBottom_toTopOf="@+id/linearLayout"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent">

        <TextView
            android:id="@+id/textView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:fontFamily="sans-serif-medium"
            android:paddingStart="0dp"
            android:paddingEnd="8dp"
            android:text="@string/text_temp"
            android:textAlignment="textStart"
            android:textSize="24sp" />

        <TextView
            android:id="@+id/tempText"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:fontFamily="sans-serif-light"
            android:textAlignment="textEnd"
            android:textSize="24sp"
            tools:text="13" />
    </LinearLayout>

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="0dp"
        android:layout_height="0dp"
        android:contentDescription="@string/description_weather_icon"
        app:layout_constraintBottom_toTopOf="@+id/linearLayout"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/linearLayout2"
        tools:srcCompat="@tools:sample/avatars" />

</androidx.constraintlayout.widget.ConstraintLayout>

プログラム

WeatherInfo.kt
package com.example.weather01


data class WeatherInfo(
    val coord: Coord,
    val weather: List<Weather>,
    val base: String,
    val main: Main,
    val visibility: Int,
    val wind: Wind,
    val clouds: All,
    val dt: Int,
    val sys: Sys,
    val timezone: Int,
    val id: Int,
    val name: String,
    val cod: Int
)

data class Coord(
    val lon: Double,
    val lat: Double
)

data class Weather(
    val id: Int,
    val main: String,
    val description: String,
    val icon: String
)

data class Main(
    val temp: Double,
    val feels_like: Double,
    val temp_min: Double,
    val temp_max: Double,
    val pressure: Int,
    val humidity: Int
)

data class Wind(
    val speed: Double,
    val deg: Int
)

data class All(
    val all: Int
)

data class Sys(
    val type: Int,
    val id: Int,
    val country: String,
    val sunrise: Int,
    val sunset: Int
)
WeatherService.kt
package com.example.weather01


import retrofit2.Call
import retrofit2.http.GET
import retrofit2.http.Query

interface WeatherService {
    @GET("data/2.5/weather/")
    fun fetchWeather(
        @Query("q") cityName: String,
        @Query("appid") apiKey: String,
        @Query("units") units: String
    ): Call<WeatherInfo>
}
MainActivity.kt
package com.example.weather01

import android.os.Bundle
import android.os.Handler
import android.os.Looper
import android.util.Log
import android.widget.Button
import android.widget.EditText
import android.widget.ImageView
import android.widget.TextView
import androidx.appcompat.app.AppCompatActivity
import com.bumptech.glide.Glide
import com.squareup.moshi.Moshi
import com.squareup.moshi.kotlin.reflect.KotlinJsonAdapterFactory
import retrofit2.Retrofit
import retrofit2.converter.moshi.MoshiConverterFactory
import kotlin.concurrent.thread

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        val editCityNameText = findViewById<EditText>(R.id.cityName)
        val postButton = findViewById<Button>(R.id.postButton)

        postButton.setOnClickListener {
            fetchApi(editCityNameText.text.toString(), "metric")
        }
    }

    private fun fetchApi(cityName: String, units: String) {
        val moshi = Moshi.Builder()
            .add(KotlinJsonAdapterFactory())
            .build()

        val retrofit = Retrofit.Builder()
            .baseUrl("https://api.openweathermap.org/")
            .addConverterFactory(MoshiConverterFactory.create(moshi))
            .build()

        val tempText = findViewById<TextView>(R.id.tempText)

        thread {
            try {
                val service: WeatherService = retrofit.create(WeatherService::class.java)
                val weatherApiResponse = service.fetchWeather(
                    cityName,
                    BuildConfig.OWM_API_KEY,
                    units
                ).execute().body()
                    ?: throw IllegalStateException("bodyがnullだよ！")

                Handler(Looper.getMainLooper()).post {
                    tempText.text = weatherApiResponse.main.temp.toString()
                    Log.d("response-weather", weatherApiResponse.toString())
                }
            } catch (e: Exception) {
                Log.d("response-weather", "debug $e")
            }
        }
    }
}

実行結果

image.png

確認したバージョン

Android Studio Giraffe | 2022.3.1 Patch 2
Build #AI-223.8836.35.2231.10811636, built on September 15, 2023
Runtime version: 17.0.6+0-17.0.6b829.9-10027231 amd64
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.
Linux 6.5.0-9-generic
GC: G1 Young Generation, G1 Old Generation
Memory: 2048M
Cores: 12
Registry:
external.system.auto.import.disabled=true
debugger.new.tool.window.layout=true
ide.text.editor.with.preview.show.floating.toolbar=false
ide.experimental.ui=true

Current Desktop: ubuntu:GNOME

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