KMM + Compose：未解决的引用：drawable。

Question

我有一个KMM应用程序，其中Android目标使用Jetpack Compose。当我尝试使用可绘制资源时，我遇到了以下错误：

e：[...]/OnboardingScreen.kt：（33,46）：未解析的引用：drawable

这是通过 painterResource(id = R.drawable.ic_icon) 访问可绘制对象时出现的结果。

我尝试了以下方法来解决该问题：

• 清理和构建项目
• 失效缓存并重启
• 执行 ./gradlew assembleDebug 时修复所有警告
• 正确导入了静态 R 类

上述方法都无法解决问题。

这是我的android模块的 build.gradle.kts 内容：

plugins {
    id("com.android.application")
    kotlin("android")
}

val composeVersion = findProperty("version.compose") as String
val composeNavigationVersion = findProperty("version.composeNavigation") as String
val koinVersion = findProperty("version.koin") as String

android {

    compileSdk = (findProperty("android.compileSdk") as String).toInt()

    defaultConfig {
        applicationId = "com.app.app.android"
        minSdk = (findProperty("android.minSdk") as String).toInt()
        targetSdk = (findProperty("android.targetSdk") as String).toInt()
        versionCode = 1
        versionName = "1.0"
    }

    buildFeatures {
        compose = true
    }

    // Set both the Java and Kotlin compilers to target Java 8.
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = "1.8"
    }

    composeOptions {
        kotlinCompilerExtensionVersion = composeVersion
    }

    buildTypes {
        getByName("release") {
            isMinifyEnabled = false
        }
    }
}

dependencies {

    implementation(project(":shared"))

    // Android
    implementation("com.google.android.material:material:1.4.0")

    // Jetpack Compose
    implementation("androidx.compose.ui:ui:$composeVersion")
    implementation("androidx.compose.ui:ui-tooling:$composeVersion")
    implementation("androidx.compose.foundation:foundation:$composeVersion")
    implementation("androidx.compose.material:material:$composeVersion")
    implementation("androidx.compose.material:material-icons-core:$composeVersion")
    implementation("androidx.compose.material:material-icons-extended:$composeVersion")
    implementation("androidx.activity:activity-compose:$composeVersion")
    implementation("androidx.navigation:navigation-compose:$composeNavigationVersion")

    // Koin
    implementation("io.insert-koin:koin-android:$koinVersion")
}

configurations.all {
    resolutionStrategy {
        force("org.jetbrains.kotlin:kotlin-stdlib:1.5.31")
    }
}

共享模块的build.gradle.kts文件：

plugins {
    kotlin("multiplatform")
    kotlin("native.cocoapods")
    id("com.android.library")
}

version = "1.0"

kotlin {
    android()
    iosX64()
    iosArm64()
    iosSimulatorArm64() // sure all ios dependencies support this target

    cocoapods {
        summary = "Some description for the Shared Module"
        homepage = "Link to the Shared Module homepage"
        ios.deploymentTarget = "14.1"
        podfile = project.file("../ios/Podfile")
        framework {
            baseName = "shared"
        }
    }

    val multiplatformVersion = findProperty("version.multiplatformSettings") as String
    val koinVersion = findProperty("version.koin") as String
    val coroutinesVersion = findProperty("version.coroutines") as String
    
    sourceSets {
        val commonMain by getting {
            dependencies {
                implementation("com.russhwolf:multiplatform-settings-no-arg:$multiplatformVersion")
                implementation("io.insert-koin:koin-core:$koinVersion")
                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutinesVersion")
            }
        }
        val commonTest by getting {
            dependencies {
                implementation(kotlin("test-common"))
                implementation(kotlin("test-annotations-common"))
            }
        }
        val androidMain by getting
        val androidTest by getting {
            dependencies {
                implementation(kotlin("test-junit"))
                implementation("junit:junit:4.13.2")
            }
        }
        val iosX64Main by getting
        val iosArm64Main by getting
        val iosSimulatorArm64Main by getting
        val iosMain by creating {
            dependsOn(commonMain)
            iosX64Main.dependsOn(this)
            iosArm64Main.dependsOn(this)
            iosSimulatorArm64Main.dependsOn(this)
        }
        val iosX64Test by getting
        val iosArm64Test by getting
        val iosSimulatorArm64Test by getting
        val iosTest by creating {
            dependsOn(commonTest)
            iosX64Test.dependsOn(this)
            iosArm64Test.dependsOn(this)
            iosSimulatorArm64Test.dependsOn(this)
        }
    }
}

android {
    compileSdk = 31
    sourceSets["main"].manifest.srcFile("src/androidMain/AndroidManifest.xml")
    defaultConfig {
        minSdk = 22
        targetSdk = 31
    }
}

最后，我的gradle.properties：

# Gradle
org.gradle.jvmargs=-Xmx2048M -Dkotlin.daemon.jvm.options\="-Xmx2048M"

# Kotlin
kotlin.code.style=official

# Android
android.useAndroidX=true
android.compileSdk=31
android.targetSdk=31
android.minSdk=22

# MPP
kotlin.mpp.enableGranularSourceSetsMetadata=true
kotlin.mpp.enableCInteropCommonization=true
kotlin.native.enableDependencyPropagation=false
kotlin.native.ignoreDisabledTargets=true

# Common versions
version.multiplatformSettings=0.8.1
version.koin=3.1.4
version.coroutines=1.5.2-native-mt

# Android versions
version.compose=1.0.5
version.composeNavigation=2.4.0-rc01

感谢您事先的支持。

- svprdga

---

请确保从您的包示例com.blabla.blablabla中导入R类。 - Denny Kurniawan

@Denny，R类已经正确导入。 - svprdga

Answer 1

这就是如何引用图像资源：

import com.your.package.R 

val img = R.drawable.img_name

或者

val img = com.your.package.R.drawable.img_name

- Taras Mykhalchuk

Answer 2

Denny Kurniawan在上面的评论中指出了我的正确方向。在更改项目名称后，我遇到了类似的问题。请检查您的'OnboardingScreen.kt'文件顶部，查看完整的'package'名称是否与您实际的项目名称相匹配，例如：“package com.android.application”。

如果'OnboardingScreen.kt'中列出的包名与您实际的项目名称不同，则静态R类可能没有被正确导入，因此会出现此错误。

换句话说，在'OnboardingScreen.kt'中的完整包名应该与'app-＞src-＞main-＞java'下显示的文件夹名称相匹配。希望这能像对我一样有所帮助。

- Silverback

Answer 3

在我的情况下，我只是将 import androidx.compose.ui.R 更改为 import com.your.package.name.R，然后嘭~~~

- Chuanqing Yang

Answer 4

对我来说，这个错误是因为我将我的图像拖到资源管理器中导致的，我通过使用“导入可绘制项”按钮手动导入图像来解决它。

- Faisal Reza