未能解决: androidx.lifecycle:lifecycle-viewmodel-ktx:1.1.1

Question

我正在尝试为android使用新的导航体系结构组件，而且当我将androidx.lifecycle:lifecycle-viewmodel-ktx:1.1.1定义为"1.1.1“时，无法解决: lifecycle_version的错误

基本上，我只是在复制和粘贴文档中的内容，所以我对这里的错误已经没有什么想法了：

apply plugin: 'com.android.application'

apply plugin: 'kotlin-android'

apply plugin: 'kotlin-android-extensions'

apply plugin: 'kotlin-kapt'

android {
    compileSdkVersion 26
    defaultConfig {
        applicationId "com.mobile.codgin.newnavigation"
        minSdkVersion 21
        targetSdkVersion 26
        versionCode 1
        versionName "1.0"
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
      }
    }

    dependencies {
    def lifecycle_version = "1.1.1"

    // ViewModel and LiveData
    implementation "android.arch.lifecycle:extensions:$lifecycle_version"
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation"org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
    implementation 'com.android.support:appcompat-v7:26.1.0'
    implementation 'com.android.support.constraint:constraint-layout:1.1.0'
    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
    testImplementation 'junit:junit:4.12'
    androidTestImplementation 'com.android.support.test:runner:1.0.2'
    androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.2'
}

Answer 1

试着替换

implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"

有了这个

//https://mvnrepository.com/artifact/androidx.lifecycle/lifecycle-viewmodel-ktx
implementation group: 'androidx.lifecycle', name:'lifecycle-viewmodel-ktx', version: '2.0.0-alpha1'

然后再同步。

你可以在这里看看：https://mvnrepository.com/artifact/androidx.lifecycle/lifecycle-viewmodel-ktx/2.0.0-alpha1

似乎存储库是以某种方式清空的。因此，您不能从存储库下载它。

Answer 2

当它显示此错误时，将此代码添加到build.gradle节

configurations {
    all {
        exclude group: 'androidx.lifecycle', module: 'lifecycle-viewmodel-ktx'
    }
}