Initial commit: Compose Multiplatform skeleton

.gitignore

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+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

android/build.gradle.kts

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+plugins {
+    id("org.jetbrains.compose")
+    id("com.android.application")
+    kotlin("android")
+}
+
+group "app.opia"
+version "1.0-SNAPSHOT"
+
+repositories {
+    jcenter()
+}
+
+dependencies {
+    implementation(project(":common"))
+    implementation("androidx.activity:activity-compose:1.3.0")
+}
+
+android {
+    compileSdkVersion(31)
+    defaultConfig {
+        applicationId = "app.opia.android"
+        minSdkVersion(24)
+        targetSdkVersion(31)
+        versionCode = 1
+        versionName = "1.0-SNAPSHOT"
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    buildTypes {
+        getByName("release") {
+            isMinifyEnabled = false
+        }
+    }
+}

android/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.opia.android">
+    <application
+            android:allowBackup="false"
+            android:supportsRtl="true"
+            android:theme="@style/Theme.AppCompat.Light.NoActionBar">
+        <activity android:name=".MainActivity" android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
+            </intent-filter>
+        </activity>
+    </application>
+</manifest>

android/src/main/java/app/opia/android/MainActivity.kt

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+package app.opia.android
+
+import app.opia.common.App
+import android.os.Bundle
+import androidx.activity.compose.setContent
+import androidx.appcompat.app.AppCompatActivity
+import androidx.compose.material.MaterialTheme
+
+class MainActivity : AppCompatActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setContent {
+            MaterialTheme {
+                App()
+            }
+        }
+    }
+}

build.gradle.kts

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+group "app.opia"
+version "1.0-SNAPSHOT"
+
+allprojects {
+    repositories {
+        google()
+        mavenCentral()
+        maven("https://maven.pkg.jetbrains.space/public/p/compose/dev")
+    }
+}
+
+plugins {
+    kotlin("multiplatform") apply false
+    kotlin("android") apply false
+    id("com.android.application") apply false
+    id("com.android.library") apply false
+    id("org.jetbrains.compose") apply false
+}

common/build.gradle.kts

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+import org.jetbrains.compose.compose
+
+plugins {
+    kotlin("multiplatform")
+    id("org.jetbrains.compose")
+    id("com.android.library")
+}
+
+group = "app.opia"
+version = "1.0-SNAPSHOT"
+
+kotlin {
+    android()
+    jvm("desktop") {
+        compilations.all {
+            kotlinOptions.jvmTarget = "11"
+        }
+    }
+    sourceSets {
+        val commonMain by getting {
+            dependencies {
+                api(compose.runtime)
+                api(compose.foundation)
+                api(compose.material)
+            }
+        }
+        val commonTest by getting {
+            dependencies {
+                implementation(kotlin("test"))
+            }
+        }
+        val androidMain by getting {
+            dependencies {
+                api("androidx.appcompat:appcompat:1.2.0")
+                api("androidx.core:core-ktx:1.3.1")
+            }
+        }
+        val androidTest by getting {
+            dependencies {
+                implementation("junit:junit:4.13")
+            }
+        }
+        val desktopMain by getting {
+            dependencies {
+                api(compose.preview)
+            }
+        }
+        val desktopTest by getting
+    }
+}
+
+android {
+    compileSdkVersion(31)
+    sourceSets["main"].manifest.srcFile("src/androidMain/AndroidManifest.xml")
+    defaultConfig {
+        minSdkVersion(24)
+        targetSdkVersion(31)
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+}

common/src/androidMain/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android" package="app.opia.common"/>

common/src/androidMain/kotlin/app/opia/common/platform.kt

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+package app.opia.common
+
+actual fun getPlatformName(): String {
+    return "Android"
+}

common/src/commonMain/kotlin/app/opia/common/App.kt

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+package app.opia.common
+
+import androidx.compose.material.Text
+import androidx.compose.material.Button
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+
+@Composable
+fun App() {
+    var text by remember { mutableStateOf("Hello, World!") }
+    val platformName = getPlatformName()
+
+    Button(onClick = {
+        text = "Hello, ${platformName}"
+    }) {
+        Text(text)
+    }
+}

common/src/commonMain/kotlin/app/opia/common/platform.kt

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+package app.opia.common
+
+expect fun getPlatformName(): String

common/src/desktopMain/kotlin/app/opia/common/DesktopApp.kt

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+// Copyright 2000-2022 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license.
+package app.opia.common
+
+import androidx.compose.desktop.ui.tooling.preview.Preview
+import androidx.compose.runtime.Composable
+
+@Preview
+@Composable
+fun AppPreview() {
+    App()
+}

common/src/desktopMain/kotlin/app/opia/common/platform.kt

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+package app.opia.common
+
+actual fun getPlatformName(): String {
+    return "Desktop"
+}

desktop/build.gradle.kts

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+import org.jetbrains.compose.compose
+import org.jetbrains.compose.desktop.application.dsl.TargetFormat
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+    kotlin("multiplatform")
+    id("org.jetbrains.compose")
+}
+
+group = "app.opia"
+version = "1.0-SNAPSHOT"
+
+
+kotlin {
+    jvm {
+        compilations.all {
+            kotlinOptions.jvmTarget = "11"
+        }
+        withJava()
+    }
+    sourceSets {
+        val jvmMain by getting {
+            dependencies {
+                implementation(project(":common"))
+                implementation(compose.desktop.currentOs)
+            }
+        }
+        val jvmTest by getting
+    }
+}
+
+compose.desktop {
+    application {
+        mainClass = "MainKt"
+        nativeDistributions {
+            targetFormats(TargetFormat.Dmg, TargetFormat.Msi, TargetFormat.Deb)
+            packageName = "opia-compose"
+            packageVersion = "1.0.0"
+        }
+    }
+}

desktop/src/jvmMain/kotlin/Main.kt

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+// Copyright 2000-2021 JetBrains s.r.o. and contributors. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
+import androidx.compose.material.MaterialTheme
+import androidx.compose.desktop.ui.tooling.preview.Preview
+import androidx.compose.material.Button
+import androidx.compose.material.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.remember
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.window.Window
+import androidx.compose.ui.window.application
+import app.opia.common.App
+
+
+fun main() = application {
+    Window(onCloseRequest = ::exitApplication) {
+        App()
+    }
+}