Android 添加到gradle后仍无法解析的引用

我决定参考以下三个课程：

• 木材

• 漏嘴金丝雀

• findNavController

我在gradle中添加了这些依赖项，在其他项目中也有这些依赖项，但我在这里面临这个问题

我曾尝试：

• 清理、重建、根据需要构建、构建
• 已删除.gradle、.idea、build、app/build文件夹并重建应用程序，但问题仍然存在
• 我还尝试了使缓存无效并重新启动它，但也没有帮助

渐变文件：

apply plugin: 'com.android.application'
apply plugin: 'com.google.gms.oss.licenses.plugin'
apply plugin: 'androidx.navigation.safeargs'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'

android {
compileSdkVersion 28
buildToolsVersion '28.0.0 rc2'
defaultConfig {
    applicationId "com.nrs.sid.creditcardsecurity"
    minSdkVersion 19
    targetSdkVersion 28
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    javaCompileOptions {
        annotationProcessorOptions {
            arguments = ["room.schemaLocation": "$projectDir/schemas".toString()]
        }
    }
}
sourceSets {
    androidTest.assets.srcDirs += files("$projectDir/schemas".toString())
}
sourceSets {
    main.java.srcDirs += 'src/main/kotlin'
}
buildTypes {
    debug {
        applicationIdSuffix '.debug'
        versionNameSuffix '-DEBUG'
        ext.alwaysUpdateBuildId = false
    }
    release {
        shrinkResources false
        minifyEnabled false
        proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
    }
}
compileOptions {
    sourceCompatibility JavaVersion.VERSION_1_8
    targetCompatibility JavaVersion.VERSION_1_8
}
allprojects {
    tasks.withType(JavaCompile) {
        options.compilerArgs << "-Xlint:unchecked" << "-Xlint:deprecation" << "-Xlint:cast" << "-Xlint:empty" << "-Xmaxerrs"
    }
}
testOptions {
    execution 'ANDROIDX_TEST_ORCHESTRATOR'
}
androidExtensions {
    experimental = true
}
kapt {
    correctErrorTypes = true
}
}

dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])

implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk8:$kotlin_version"

implementation "androidx.core:core-ktx:1.0.0-alpha3"
implementation 'androidx.fragment:fragment-ktx:1.0.0-alpha3'
implementation 'androidx.collection:collection-ktx:1.0.0-alpha3'

implementation "androidx.appcompat:appcompat:1.0.0-alpha3"

implementation "androidx.recyclerview:recyclerview:1.0.0-alpha3"
implementation 'androidx.recyclerview:recyclerview-selection:1.0.0-alpha3'

implementation "androidx.annotation:annotation:1.0.0-alpha3"

implementation 'androidx.webkit:webkit:1.0.0-alpha3'

implementation 'com.google.android.material:material:1.0.0-alpha3'

implementation 'androidx.constraintlayout:constraintlayout:1.1.2'

//implementation 'com.google.android.gms:play-services-oss-licenses:15.0.1'

implementation('com.google.android.gms:play-services-oss-licenses:15.0.1', {
    exclude group: 'com.google.android.gms'
})

implementation 'androidx.browser:browser:1.0.0-alpha3'

implementation 'com.google.code.findbugs:jsr305:3.0.2'

implementation "io.reactivex.rxjava2:rxandroid:2.0.2"
implementation "io.reactivex.rxjava2:rxjava:2.1.12"
implementation 'io.reactivex.rxjava2:rxkotlin:2.2.0'

implementation "com.jakewharton.rxbinding2:rxbinding-kotlin:2.1.1"
implementation "com.jakewharton.rxbinding2:rxbinding-support-v4-kotlin:2.1.1"
implementation "com.jakewharton.rxbinding2:rxbinding-appcompat-v7-kotlin:2.1.1"
implementation "com.jakewharton.rxbinding2:rxbinding-design-kotlin:2.1.1"
implementation "com.jakewharton.rxbinding2:rxbinding-recyclerview-v7-kotlin:2.1.1"

implementation "com.jakewharton.timber:timber:4.7.0"

implementation 'com.google.dagger:dagger:2.16'
kapt 'com.google.dagger:dagger-compiler:2.16'
implementation 'com.google.dagger:dagger-android:2.16'
implementation 'com.google.dagger:dagger-android-support:2.16'
kapt 'com.google.dagger:dagger-android-processor:2.16'

implementation "org.greenrobot:eventbus:3.1.1"

debugImplementation "com.squareup.leakcanary:leakcanary-android:1.5.4"
releaseImplementation "com.squareup.leakcanary:leakcanary-android-no-op:1.5.4"

implementation "com.github.markzhai:blockcanary-android:1.5.0"

implementation 'androidx.lifecycle:lifecycle-extensions:2.0.0-alpha1'
implementation 'androidx.lifecycle:lifecycle-common-java8:2.0.0-alpha1'
implementation 'androidx.lifecycle:lifecycle-reactivestreams:2.0.0-alpha1'
testImplementation 'androidx.arch.core:core-testing:2.0.0-alpha1'

implementation 'androidx.room:room-runtime:2.0.0-alpha1'
kapt 'androidx.room:room-compiler:2.0.0-alpha1'
implementation 'androidx.room:room-rxjava2:2.0.0-alpha1'
implementation 'androidx.room:room-guava:2.0.0-alpha1'
testImplementation 'androidx.room:room-testing:2.0.0-alpha1'

implementation 'android.arch.navigation:navigation-fragment-ktx:1.0.0-alpha02'
implementation 'android.arch.navigation:navigation-ui-ktx:1.0.0-alpha02'
androidTestImplementation 'android.arch.navigation:navigation-testing-ktx:1.0.0-alpha02'

implementation "com.squareup.retrofit2:retrofit:2.4.0"
implementation "com.squareup.okhttp3:logging-interceptor:3.10.0"
implementation "com.google.code.gson:gson:2.8.2"
implementation "com.squareup.retrofit2:converter-gson:2.4.0"
implementation "com.squareup.retrofit2:adapter-rxjava2:2.4.0"

implementation "com.twitter.serial:serial:0.1.6"
testImplementation "org.mockito:mockito-core:2.16.0"
implementation "org.jetbrains:annotations:16.0.1"

testImplementation "junit:junit:4.12"

androidTestImplementation 'androidx.test:runner:1.1.0-alpha3'
androidTestImplementation 'androidx.test:rules:1.1.0-alpha3'
androidTestUtil 'androidx.test:orchestrator:1.1.0-alpha3'

androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0-alpha3'
androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.1.0-alpha3'
androidTestImplementation 'androidx.test.espresso:espresso-intents:3.1.0-alpha3'
androidTestImplementation 'androidx.test.espresso:espresso-accessibility:3.1.0-alpha3'
androidTestImplementation 'androidx.test.espresso:espresso-web:3.1.0-alpha3'
implementation 'androidx.test.espresso.idling:idling-concurrent:3.1.0-alpha3'

testImplementation "org.robolectric:robolectric:3.8"
}

---

你有没有可能用kotlin？如果是这样，您可能需要将

-ktx

后缀添加到依赖项中，如下所述

我还缺少

findNavController

，直到我添加了

-ktx

，如我的

build.gradle

dependencies {
    def nav_version = "1.0.0-alpha02"

//    Ensure to use the -ktx version below (we are using kotlin)
    implementation "android.arch.navigation:navigation-fragment-ktx:$nav_version" // use -ktx for Kotlin
    implementation "android.arch.navigation:navigation-ui-ktx:$nav_version" // use -ktx for Kotlin
    androidTestImplementation "android.arch.navigation:navigation-testing-ktx:$nav_version"
....
}

下面是我的活动，其中包含“findNavController”所需的导入。请注意，需要删除使用supportFragmentManager从activity Android Studio模板生成的代码，以使其正常工作

import androidx.navigation.findNavController

class NavigationActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContentView(R.layout.navigation_activity)

        //TODO: This was part of the generated activity - not needed ?
//        if (savedInstanceState == null) {
//            supportFragmentManager.beginTransaction()
//                    .replace(R.id.container, NavigationFragment.newInstance())
//                    .commitNow()
//        }
    }

    override fun onSupportNavigateUp() = findNavController(R.id.my_nav_host_fragment).navigateUp()
}

---

告诉我错误log@RutvikBhatt用错误日志更新帖子扫描你给我看完整等级dependencies@RutvikBhatt用gradle Dependenciest更新了帖子这发生在我尝试迁移到AndroidX之后。你找到解决办法了吗？

import androidx.navigation.findNavController

class NavigationActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        setContentView(R.layout.navigation_activity)

        //TODO: This was part of the generated activity - not needed ?
//        if (savedInstanceState == null) {
//            supportFragmentManager.beginTransaction()
//                    .replace(R.id.container, NavigationFragment.newInstance())
//                    .commitNow()
//        }
    }

    override fun onSupportNavigateUp() = findNavController(R.id.my_nav_host_fragment).navigateUp()
}