那些遇到过的问题

Android 视图绑定 - 多模块项目中未解析的引用

Ada*_*itz 5 android android-fragments kotlin android-databinding android-viewbinding

问题

的加密鸣叫示例应用程序root分支器具的Android视图绑定为三个应用程序的模块，app，app-rx，和app-simple。所有三个模块都按预期运行。但是，在app和app-rx模块中， 存在 Lint 错误Unresolved reference。

例如，在app和app-rx模块fragment_feed.xml中未解析，而在 中app-simple，参考显示没有导入错误。

已提交IssueTracker错误。请为该问题加注星标以提高其意识。

配置

  • 安卓工作室 4.1.1
  • Build #AI-201.8743.12.41.6953283，建于2020年11月4日
  • 运行时版本：1.8.0_242-release-1644-b3-6915495 x86_64
  • VM：JetBrains sro 的 OpenJDK 64 位服务器 VM
  • macOS 10.16
  • GC：ParNew、ConcurrentMarkSweep
  • 内存：1979M
  • 核心数：16
  • 注册表：ide.new.welcome.screen.force=true, external.system.auto.import.disabled=true
  • 非捆绑插件：com.android.tool.sizereduction.plugin、com.thoughtworks.gauge、org.jetbrains.kotlin、cn.wjdghd.unique.plugin.id、mobi.hsz.idea.gitignore、com.developerphil.adbidea , com.google.mad-scorecard

建筑学

设置.gradle

rootProject.name='CryptoTweets'
include ':app', ':app-rx', ':app-simple'
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项目导航视图

  • app: CryptoTweets > app > src > main > java > app > cryptotweets > feed > FeedFragment
  • app-rx: CryptoTweets > app-rx > src > main > java > app > cryptotweets > feed > FeedFragment
  • app-simple: CryptoTweets > app-simple > src > main > java > app > cryptotweets > feed > FeedFragment

执行

build.gradle（项目）

buildscript {
    ext.gradle_version = '4.1.1'
    ext.kotlin_version = '1.4.21'
    ext.kotlin_coroutines_version = '1.3.9'
    ext.appcompat = '1.2.0'
    ext.legacy_support = '1.0.0'
    ext.core_ktx = '1.3.2'
    ext.constraint_layout = '2.0.4'
    ext.navigation_version = '2.3.2'
    ext.navigation_safe_args_version = '2.3.1'
    ext.dagger_version = '2.28.1'
    ext.retrofit_version = '2.9.0'
    ext.lifecycle_livedata_ktx = '2.2.0'
    ext.room_version = '2.2.5'
    ext.room_alpha_version = '2.3.0-alpha03'
    ext.paging_version = '2.1.2'
    ext.paging_version_alpha = '3.0.0-alpha10'
    ext.coil_version = '0.13.0'
    ext.glide_version = '4.11.0'
    ext.junit = '4.13.1'
    ext.androidx_junit = '1.1.2'
    ext.espresso_core = '3.3.0'
    repositories {
        google()
        jcenter()
        
    }
    dependencies {
        classpath "com.android.tools.build:gradle:$gradle_version"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath "androidx.navigation:navigation-safe-args-gradle-plugin:$navigation_safe_args_version"
    }
}

allprojects {
    repositories {
        google()
        jcenter()
        
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir
}
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app-simple

此模块不包含查看绑定皮棉误差Unresolved reference在FeedFragment.kt为FragmentFeedBinding。

build.gradle (:app-simple)

plugins {
    id 'com.android.application'
    id 'kotlin-android'
    id 'androidx.navigation.safeargs.kotlin'
    id 'kotlin-kapt'
}

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.3"

    defaultConfig {
        applicationId "app.cryptotweets"
        minSdkVersion 21
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

    compileOptions { targetCompatibility JavaVersion.VERSION_1_8 }

    kotlinOptions.jvmTarget = '1.8'

    buildFeatures.viewBinding = true
}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.4.21"
    implementation 'androidx.core:core-ktx:1.3.2'
    implementation 'androidx.appcompat:appcompat:1.2.0'
    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'

    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.4.1"
    implementation "androidx.navigation:navigation-ui-ktx:2.3.2"
    implementation "androidx.navigation:navigation-fragment-ktx:2.3.2"
    implementation 'androidx.legacy:legacy-support-v4:1.0.0'
    implementation "com.squareup.retrofit2:retrofit:2.9.0"
    implementation "com.squareup.retrofit2:converter-gson:2.9.0"
    implementation "androidx.paging:paging-runtime-ktx:3.0.0-alpha10"
    implementation "io.coil-kt:coil:0.13.0"

    testImplementation 'junit:junit:4.13.1'
    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
}
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FeedFragment.kt

package app.cryptotweets.feed

import androidx.fragment.app.Fragment
import app.cryptotweets.R
import app.cryptotweets.databinding.FragmentFeedBinding
import app.cryptotweets.feed.adapter.FeedAdapter

class FeedFragment : Fragment(R.layout.fragment_feed) {

    private val viewModel: FeedViewModel by viewModels()
    lateinit var adapter: FeedAdapter

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        // The View Binding reference for 'FragmentFeedBinding' imports as expected.
        val binding = FragmentFeedBinding.bind(view)
        initViewStates(binding)
    }
}
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app

该模块包含查看绑定皮棉误差Unresolved reference在FeedFragment.kt为FragmentFeedBinding。

build.gradle (:app)

plugins {
    id 'com.android.application'
    id 'kotlin-android'
    id 'androidx.navigation.safeargs.kotlin'
    id 'kotlin-kapt'
}

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.3"

    defaultConfig {
        applicationId "app.cryptotweets"
        minSdkVersion 21
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

    compileOptions { targetCompatibility JavaVersion.VERSION_1_8 }

    kotlinOptions.jvmTarget = '1.8'

    buildFeatures.viewBinding = true

}

dependencies {
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:$kotlin_coroutines_version"
    implementation "androidx.appcompat:appcompat:$appcompat"
    implementation "androidx.legacy:legacy-support-v4:$legacy_support"
    implementation "androidx.core:core-ktx:$core_ktx"
    implementation "androidx.constraintlayout:constraintlayout:$constraint_layout"
    implementation "androidx.navigation:navigation-ui-ktx:$navigation_version"
    implementation "androidx.navigation:navigation-fragment-ktx:$navigation_version"
    implementation "com.google.dagger:dagger:$dagger_version"
    kapt "com.google.dagger:dagger-compiler:$dagger_version"
    implementation "com.squareup.retrofit2:retrofit:$retrofit_version"
    implementation "com.squareup.retrofit2:converter-gson:$retrofit_version"
    implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_livedata_ktx"
    implementation "androidx.room:room-runtime:$room_alpha_version"
    implementation "androidx.room:room-ktx:$room_alpha_version"
    kapt "androidx.room:room-compiler:$room_alpha_version"
    implementation "androidx.paging:paging-runtime-ktx:$paging_version_alpha"
    implementation "io.coil-kt:coil:$coil_version"

    testImplementation "junit:junit:$junit"
    testImplementation "androidx.room:room-testing:$room_version"
    androidTestImplementation "androidx.test.ext:junit:$androidx_junit"
    androidTestImplementation "androidx.test.espresso:espresso-core:$espresso_core"
}
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FeedFragment.kt

package app.cryptotweets.feed

import androidx.fragment.app.Fragment
import app.cryptotweets.R
import app.cryptotweets.databinding.FragmentFeedBinding
...

class FeedFragment : Fragment(R.layout.fragment_feed) {

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        // Fixme: Unresolved reference for 'FragmentFeedBinding'
        val binding = FragmentFeedBinding.bind(view)
        initViewStates(binding)
    }
}
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app-rx

该模块包含查看绑定皮棉误差Unresolved reference在FeedFragment.kt为FragmentFeedBinding。

build.gradle (:app-rx)

plugins {
    id 'com.android.application'
    id 'kotlin-android'
    id 'androidx.navigation.safeargs.kotlin'
    id 'kotlin-kapt'
}

android {
    compileSdkVersion 29
    buildToolsVersion "29.0.3"

    kotlinOptions { jvmTarget = '1.8' }

    defaultConfig {
        applicationId "app.cryptotweets"
        minSdkVersion 21
        targetSdkVersion 29
        versionCode 1
        versionName "1.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    }

    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
        }
    }

    compileOptions { targetCompatibility JavaVersion.VERSION_1_8 }

    buildFeatures.viewBinding = true

}

dependencies {
    def rx_version = '3.0.0'
    implementation fileTree(dir: 'libs', include: ['*.jar'])
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
    implementation "androidx.appcompat:appcompat:$appcompat"
    implementation "androidx.legacy:legacy-support-v4:$legacy_support"
    implementation "androidx.core:core-ktx:$core_ktx"
    implementation "androidx.constraintlayout:constraintlayout:$constraint_layout"
    implementation "androidx.navigation:navigation-ui-ktx:$navigation_version"
    implementation "androidx.navigation:navigation-fragment-ktx:$navigation_version"
    implementation "com.google.dagger:dagger:$dagger_version"
    kapt "com.google.dagger:dagger-compiler:$dagger_version"
    implementation "com.squareup.retrofit2:retrofit:$retrofit_version"
    implementation "com.squareup.retrofit2:converter-gson:$retrofit_version"
    implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_livedata_ktx"
    implementation "androidx.room:room-runtime:$room_alpha_version"
    implementation "androidx.room:room-ktx:$room_alpha_version"
    kapt "androidx.room:room-compiler:$room_alpha_version"
    implementation "androidx.paging:paging-runtime-ktx:$paging_version"
    implementation "androidx.paging:paging-rxjava2-ktx:$paging_version"
    implementation "io.coil-kt:coil:$coil_version"
    implementation "io.reactivex.rxjava3:rxkotlin:$rx_version"
    implementation "io.reactivex.rxjava3:rxandroid:$rx_version"
    implementation "com.squareup.retrofit2:adapter-rxjava3:$retrofit_version"

    testImplementation "junit:junit:$junit"
    testImplementation "androidx.room:room-testing:$room_version"
    androidTestImplementation "androidx.test.ext:junit:$androidx_junit"
    androidTestImplementation "androidx.test.espresso:espresso-core:$espresso_core"
}
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FeedFragment.kt

package app.cryptotweets.feed


import androidx.fragment.app.Fragment
import app.cryptotweets.R
import app.cryptotweets.databinding.FragmentFeedBinding
...

class FeedFragment : Fragment(R.layout.fragment_feed) {

    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
        super.onViewCreated(view, savedInstanceState)
        // Fixme: Unresolved reference for 'FragmentFeedBinding'
        val binding = FragmentFeedBinding.bind(view)
        viewModel.launchViewEvents(this)
        initViewStates(binding)
    }

}
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尝试的解决方案

  1. 文件> 将项目与 Gradle 文件同步
  2. 构建>清理项目
  3. 构建>重建项目
  4. 清除构建缓存
  5. 文件> 使缓存无效/重新启动...
  6. 更新依赖库版本。
  7. 从 GitHub重新克隆加密推文示例应用程序存储库。

Die*_*rez 0

肯定会晚了，但以防万一其他人也面临同样的问题，这就是我解决它的方法：

在我的具体情况下，我在模块 Gradle 文件中有下一个实现：

implementation "androidx.core:core-ktx:+"
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更改为 Kotlin 特定版本后，如下所示：

implementation "androidx.core:core-ktx:1.8.0"
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“未解决的参考”构建错误已消失。

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