android - 在 Android Studio 3.3 Canary 3 Kotlin 项目上找不到符号 DataBindingComponent

Question

我刚刚在启用了 Kotlin 的 Android Studio 3.3 Canary 3 上创建了一个新项目。然后我还启用了数据绑定(bind)，但我收到一条错误消息，提示找不到 DataBindingComponent 类。

这是我的gradle文件

buildscript {
    apply from: 'versions.gradle'
    addRepos(repositories)
    dependencies {
        classpath deps.android_gradle_plugin
        classpath deps.kotlin.plugin
        classpath deps.kotlin.allopen
        classpath deps.navigation.safe_args_plugin
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
    repositories {
        google()
    }
}

allprojects {
    addRepos(repositories)
}


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

我的模块 gradle 文件:

 apply plugin: 'com.android.application'

    apply plugin: 'kotlin-android'

    apply plugin: 'kotlin-android-extensions'

    apply plugin: 'kotlin-kapt'

    apply plugin: 'androidx.navigation.safeargs'


    android {
        compileSdkVersion build_versions.target_sdk
        buildToolsVersion build_versions.build_tools
        defaultConfig {
            applicationId "arca.advanced.mg.com.myapplication"
            minSdkVersion build_versions.min_sdk
            targetSdkVersion build_versions.target_sdk
            versionCode 1
            versionName "1.0"
            testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
        }
        buildTypes {
            release {
                minifyEnabled false
                proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
            }
        }
        dataBinding {
            enabled = true
        }
        compileOptions {
            sourceCompatibility JavaVersion.VERSION_1_8
            targetCompatibility JavaVersion.VERSION_1_8
        }
    }

    dependencies {
        implementation deps.support.app_compat
        implementation deps.support.recyclerview
        implementation deps.support.cardview
        implementation deps.support.design
        implementation deps.support.legacy
        implementation deps.navigation.fragment_ktx
        implementation deps.room.runtime
        implementation deps.lifecycle.runtime
        implementation deps.lifecycle.extensions
        implementation deps.lifecycle.java8
        implementation deps.retrofit.runtime
        implementation deps.retrofit.gson
        implementation deps.glide.runtime

        implementation deps.dagger.runtime
        implementation deps.dagger.android
        implementation deps.dagger.android_support
        implementation deps.constraint_layout
        implementation deps.kotlin.stdlib

        implementation deps.timber
        implementation deps.rx.java
        implementation deps.rx.android

        kapt deps.dagger.android_support_compiler
        kapt deps.dagger.compiler
        kapt deps.room.compiler
        kapt deps.lifecycle.compiler
    }

我的 fragment 文件

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

    <data>

        <variable
            name="viewModel"
            type="arca.advanced.mg.com.arca.ui.splash.SplashViewModel" />

    </data>


    <RelativeLayout
        android:id="@+id/activity_main"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:background="@color/colorPrimary"
        android:paddingBottom="@dimen/activity_vertical_margin"
        android:paddingLeft="@dimen/activity_horizontal_margin"
        android:paddingRight="@dimen/activity_horizontal_margin"
        android:paddingTop="@dimen/activity_vertical_margin">

        <ImageView
            android:layout_width="70dp"
            android:layout_height="70dp"
            android:layout_centerInParent="true"
            android:src="@mipmap/ic_launcher" />
    </RelativeLayout>

</layout>

这是我的错误

Answer 1

我认为这是 kapt 冲突。

如果可能，请尝试关闭 Dagger，并像这样检查 Room 中的错误:

Fields annotated with @Relation cannot be constructor parameters. These values are fetched after the object is constructed.

Cannot find setter for field.

Cannot figure out how to save this field into database.

如果没有帮助，请尝试将 libs 与 kapt 的库一一关闭，并仔细检查错误日志。

检查./gradlew app:dependencies传递依赖，可能是androidx的问题。

同时检查 gradlew app:dependencies --configuration kapt 也许你会发现一些可疑的东西