错误:在android studio 3.0中找不到符号类,用于将kotlin类添加到java类中

Question

我使用android studio 3.0和一些旧的java类将Java转换为Kotlin.之后,Kotlin类无法在java类中导入!在下面你可以看到我的成绩和我的错误图片.

模块build.grade

buildscript {
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0'
        classpath 'com.google.gms:google-services:3.1.0'

        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

allprojects {
    repositories {
        jcenter()
    }
}

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

在应用程序级别build.gradel通常我使用gradel代码和Android 3.0我认为我们需要任何东西

apply plugin: 'com.android.application'

android {
    compileSdkVersion 25
    buildToolsVersion '26.0.2'
    defaultConfig {
        applicationId "com.idehnavazan.beautifierclient"
        minSdkVersion 14
        targetSdkVersion 25
        versionCode 1
        versionName "1.0"
        multiDexEnabled true
        testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }

    dataBinding {
        enabled = true
    }


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


}
dependencies {
    compile 'com.android.support:multidex:1.0.1'  
    compile 'com.android.support:appcompat-v7:25.3.1'
    compile 'com.github.rey5137:material:1.2.2'
    compile 'com.android.support:cardview-v7:25.3.1'

}
apply plugin: 'com.google.gms.google-services'

Answer 1

要使用Kotlin文件,您需要将Kotlin添加到您的项目中.

项目/的build.gradle

buildscript {
    ext.kotlinVersion = '1.1.51'
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlinVersion"
    }
}

项目/模块/的build.gradle

apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'

dependencies {
    implementation "org.jetbrains.kotlin:kotlin-stdlib:$kotlinVersion"
}

下一步是什么

由于您使用的是支持库25.3.1和Android插件3.0.0,您的下一个问题可能是:未找到样式属性'@android:attr/windowEnterAnimation'.