Kotlin 1.6 和 Android Studio 更新后，数据绑定显示错误但应用程序编译并运行良好

Question

我的 android 工作室版本是

Arctic Fox | 2020.3.1 Patch 3
Build #AI-203.7717.56.2031.7784292, built on October 1, 2021

将 IDE 和 kotlin 更新到 1.6 后，我打开了一个正在处理的项目，Android Stidio 将数据绑定字段标记为红色，显示以下错误：

正文：

Cannot access 'androidx.databinding.Observable' which is a supertype of 
'com.cioccarellia.wordbucket.databinding.ActivityMainBinding'. 
Check your module classpath for missing or conflicting dependencies

奇怪的是，一切都编译好了，应用程序运行正常，这些错误就在 IDE 中，每次我通过数据绑定访问视图时它们都会弹出。

自更新 android studio 以来，我没有更改我的依赖项。对于这种情况，还有其他人有同样的问题/解决方案吗？

主要Activityxml:

<?xml version="1.0" encoding="utf-8"?>
<layout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools">

    <data>

    </data>

    <androidx.coordinatorlayout.widget.CoordinatorLayout
        android:id="@+id/coordinator_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        tools:context="com.cioccarellia.wordbucket.activity.MainActivity">

        ...

    </androidx.coordinatorlayout.widget.CoordinatorLayout>
</layout>

一般build.gradle:

buildscript {
    ext {
        kotlin_version = "1.6.0"
    }

    repositories {
        google()
        mavenCentral()
        gradlePluginPortal()
        maven { url 'https://jitpack.io' }
    }

    dependencies {
        classpath "com.android.tools.build:gradle:7.0.3"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath 'com.google.gms:google-services:4.3.10'
        classpath "com.google.dagger:hilt-android-gradle-plugin:2.40.3"
        classpath "androidx.navigation:navigation-safe-args-gradle-plugin:2.3.5"
        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.8.1'
        classpath "com.github.ben-manes:gradle-versions-plugin:0.39.0"
    }
}

task clean(type: Delete) {
    delete rootProject.buildDir

申请build.gradle：

plugins {
    id "com.android.application"
    id "kotlin-android"
    id "kotlin-kapt"
    id "dagger.hilt.android.plugin"

    id "com.google.gms.google-services"
    id "androidx.navigation.safeargs.kotlin"
    id "com.github.ben-manes.versions"
    id "kotlin-parcelize"
    id "com.google.firebase.crashlytics"
}

android {
    compileSdk 31

    defaultConfig {
        applicationId "com.cioccarellia.wordbucket"
        minSdk 23
        targetSdk 31

        versionCode 1
        versionName "1.0.0"

        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        vectorDrawables.useSupportLibrary true
    }

    buildTypes {
        debug {
            versionNameSuffix ".dev"
        }

        release {
            debuggable false

            // Enables code shrinking, obfuscation, and optimization
            minifyEnabled true

            // Enables resource shrinking, which is performed by the
            // Android Gradle plugin.
            shrinkResources true

            // Includes the default ProGuard rules files that are packaged with
            // the Android Gradle plugin. To learn more, go to the section about
            // R8 configuration files.
            proguardFiles getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro"
        }
    }

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    kotlinOptions {
        jvmTarget = "1.8"
    }

    buildFeatures {
        dataBinding true
    }

    sourceSets {
        main.res.srcDirs = [
                "src/main/res",
                "src/main/res-public"
        ]

        android.sourceSets.all {
            java.srcDir("src/$name/kotlin")
        }
    }

    lintOptions {
        // if set to true (default), stops the build if errors are found.
        abortOnError false
        // if true, only report errors.
        ignoreWarnings false
    }
}

dependencies {
    // AndroidX
    implementation "androidx.core:core-ktx:1.7.0"
    implementation "androidx.appcompat:appcompat:1.4.0"
    implementation "androidx.constraintlayout:constraintlayout:2.1.2"
    implementation "com.google.android.material:material:1.6.0-alpha01"
    implementation "androidx.legacy:legacy-support-v4:1.0.0"

    // Lifecycle
    def lifecycle_version = "2.4.0"
    implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
    implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"

    // Navigation
    implementation "androidx.navigation:navigation-fragment-ktx:2.3.5"
    implementation "androidx.navigation:navigation-ui-ktx:2.3.5"


    // Coroutines
    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.5.2"



    // DI -> Hilt
    implementation "com.google.dagger:hilt-android:2.40.3"
    kapt "com.google.dagger:hilt-compiler:2.40.3"



    // Import the Firebase BoM
    implementation platform("com.google.firebase:firebase-bom:28.4.2")

    // When using the BoM, you don"t specify versions in Firebase library dependencies
    implementation "com.google.firebase:firebase-crashlytics-ktx"
    implementation "com.google.firebase:firebase-analytics-ktx"
    implementation "com.google.firebase:firebase-auth-ktx"
    implementation "com.google.firebase:firebase-firestore-ktx"


    // LeakCanary
    debugImplementation "com.squareup.leakcanary:leakcanary-android:2.7"


    // Logging
    implementation "com.jakewharton.timber:timber:5.0.1"


    // Styles
    implementation 'com.airbnb.android:paris:2.0.1'
    kapt 'com.airbnb.android:paris-processor:2.0.1'


    // JUnit Default Dependencies
    testImplementation "junit:junit:4.13.2"
    androidTestImplementation "androidx.test.ext:junit:1.1.3"
    androidTestImplementation "androidx.test.espresso:espresso-core:3.4.0"
}

Answer 1

尝试重新启动 IDE。如果这不起作用，请在 window 顶部的“构建”>“清理项目”中清理项目，然后通过“构建”>“重建项目”完全重建它。

编辑： 另一个原因是 Android Studio 将不再支持绑定到直接元素，因此您必须自己指定绑定。

为此，请在应用程序 gradle 文件中添加 BuildFeatures：

android {
compileSdk 31

//This right here
buildFeatures{
    viewBinding true
}

defaultConfig {
    applicationId "com.cioccarellia.wordbucket"
    minSdk 23
    targetSdk 31

    versionCode 1
    versionName "1.0.0"

    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    vectorDrawables.useSupportLibrary true
}

然后通过将此添加到您的 activity 文件来创建新绑定：

//Declare the binding
private lateinit val binding : ActivityMainBinding

override fun onCreate(savedInstanceState: Bundle?) {
    //Initialize the binding
    binding = ActivityMainBinding.inflate(layoutInflater)

    super.onCreate(savedInstanceState)
    //Change the content view to the root of the binding
    setContentView(binding.root)
}

然后在使用您的视图时引用绑定：

binding.toolbar.title = bucket.name

Answer 2

更新 android studio 解决了问题

Kotlin 1.6 和 Android Studio 更新后，数据绑定显示错误但应用程序编译并运行良好

After Kotlin 1.6 and Android Studio update, databinding shows errors but app compiles and runs fine

data-binding

android

kotlin

android-studio