我正在学习 Kotlin 语言,当我想添加导航时,我按照官方网站建议的步骤进行操作,但我的项目不起作用
我遇到的错误 Gradle 同步失败:原因:启动失败: 构建文件“C:\Users....\Desktop\AndroidStudioProjeler\NavigationKotlin\build.gradle”:13:无法解析类 val @ 第 13 行,第 13 列。 val nav_version = "2.3.5" ^ 1 个错误
第 13 行 =val nav_version = "2.3.5"
plugins {
id 'com.android.application'
id 'kotlin-android'
id("androidx.navigation.safeargs")
id("androidx.navigation.safeargs.kotlin")
}
android {
compileSdk 31
defaultConfig {
applicationId "com.example.navigationkotlin"
minSdk 23
targetSdk 31
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled 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 {
val nav_version = "2.3.5"
// Kotlin
implementation("androidx.navigation:navigation-fragment-ktx:$nav_version")
implementation("androidx.navigation:navigation-ui-ktx:$nav_version")
implementation 'androidx.core:core-ktx:1.7.0'
implementation 'androidx.appcompat:appcompat:1.4.0'
implementation 'com.google.android.material:material:1.4.0'
implementation 'androidx.constraintlayout:constraintlayout:2.1.2'
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.3'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
}
构建.gradle
buildscript {
ext.nav_version = "2.3.5"
repositories {
google()
mavenCentral()
}
dependencies {
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:2.3.5"
val nav_version = "2.3.5"
classpath("androidx.navigation:navigation-safe-args-gradle-plugin:$nav_version")
}
}
task clean(type: Delete) {
delete rootProject.buildDir
}
最佳答案
首先我开始了一个新项目,然后我没有用“val”定义它,而是用“def”定义它,所以=def nav_version =“2.3.0”。我使用 2.3.0 而不是 2.3.5 并删除了“实现”括号。
关于android - 当我在 android studio 中添加导航时,出现 "Build gradle start up"错误和 "unable to resolve class val :13"错误,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/70585614/