无法将导航依赖项添加到 build.gradle 文件

Question

这是我的 build.gradle 应用程序或模块文件：

apply plugin: 'com.android.application'

android {
    compileSdkVersion 23
    buildToolsVersion '27.0.3'

    defaultConfig {
        applicationId "com.example.android.miwok"
        minSdkVersion 15
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
}


dependencies {
    implementation 'com.android.support.constraint:constraint-layout:1.1.3'
    compile fileTree(dir: 'libs', include: ['*.jar'])   
    testCompile 'junit:junit:4.12'  
    implementation 'com.android.support:appcompat-v7:23.3.0'
    implementation 'com.android.support:support-v4:23.3.0'
    implementation 'com.android.support:design:23.3.0'
    def nav_version = "2.2.1"

    // Java language implementation
    implementation "androidx.navigation:navigation-fragment:$nav_version"
    implementation "androidx.navigation:navigation-ui:$nav_version"

    // Kotlin
    implementation "androidx.navigation:navigation-fragment-ktx:$nav_version"
    implementation "androidx.navigation:navigation-ui-ktx:$nav_version"

    // Dynamic Feature Module Support
    implementation "androidx.navigation:navigation-dynamic-features-fragment:$nav_version"

    // Testing Navigation
    androidTestImplementation "androidx.navigation:navigation-testing:$nav_version"
}

我还在属性文件中添加了 android.useAndroidX=true 行。得到这些错误：错误：解析失败：androidx.navigation:navigation-dynamic-features-fragment:2.2.1 错误：解析失败：androidx.navigation:navigation-testing:2.2.1

Answer 1

navigation-testing 和 navigation-dynamic-features-fragment 工件仅在 Navigation 2.3.0-alpha01 中引入，当前版本为 2.3.0-alpha04。如果您想使用这些工件，您需要将 nav_version 至少更新到该版本。

无法将导航依赖项添加到 build.gradle 文件

Unable to add Navigation dependency to the build.gradle file

navigation

android

build.gradle

android-gradle-plugin