Kotlin Android App编译失败并显示消息:未解决的参考:kotlinx

问题描述

我正在根据面向Android开发人员的Kotlin"一书中的说明测试基于Kotlin的基本Android应用.我正在使用Android Studio 2.1.1.

I am testing out a basic Kotlin-based Android app based on the instructions in the "Kotlin for Android Developers" book. I am using Android Studio 2.1.1.

我具有以下build.grade(项目:WeatherApp)设置:

I have the following build.grade (Project: WeatherApp) setup:

allprojects {
    repositories {
        jcenter()
    }
}

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

我具有以下build.grade(Module:App)设置:

I have the following build.grade (Module:App) setup:

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

buildscript {
    ext.support_version = '23.1.1'
    ext.kotlin_version = '1.0.2'
    ext.anko_version = '0.8.2'
    repositories {
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:2.1.0'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
        classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
        // NOTE: Do not place your application dependencies here; they belong
        // in the individual module build.gradle files
    }
}

android {
    compileSdkVersion 23
    buildToolsVersion "23.0.1"

    defaultConfig {
        applicationId "com.qtimemedia.weatherapp"
        minSdkVersion 15
        targetSdkVersion 23
        versionCode 1
        versionName "1.0"
    }
    buildTypes {
        release {
            minifyEnabled false
            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
        }
    }
    sourceSets {
        main.java.srcDirs += 'src/main/kotlin'
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    compile 'com.android.support:appcompat-v7:23.4.0'
    compile 'org.jetbrains.anko:anko-sdk23:0.8.3'
    compile 'org.jetbrains.anko:anko-appcompat-v7:0.8.3'
    compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
}
repositories {
    mavenCentral()
}

我有以下MainActivity.kt代码:

I have the following MainActivity.kt code:

package com.qtimemedia.weatherapp

import android.support.v7.app.AppCompatActivity
import android.os.Bundle
import kotlinx.android.synthetic.main.activity_main.*

class MainActivity : AppCompatActivity() {

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        message.text = "Hello Kotlin!"
    }
}

这是我的activity_main.xml代码:

Here is my activity_main.xml code:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.qtimemedia.weatherapp.MainActivity">

    <TextView
        android:id="@+id/message"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />
</RelativeLayout>

这是我的strings.xml代码:

Here is my strings.xml code:

<resources>
    <string name="app_name">WeatherApp</string>
    <string name="hello_world">"Hello World!"</string>
</resources>

我正在尝试使用可用的Nexus 6 API 23仿真器运行MainActivity.我已选中工具>> Android >>启用ADB集成"选项(我也尝试过将其关闭).模拟器似乎正在运行，但由于构建失败，我的应用程序似乎未加载.运行仿真器时，我在"4:运行"窗口中看到以下消息:

I am trying to run my MainActivity using the available Nexus 6 API 23 emulator. I have the option "Tools >> Android >> Enable ADB Integration" checked as on (I tried this with it off as well). The emulator appears to be working but my app does not appear to be loading due to a failed build. When running the emulator I see the following messages in the "4: Run" window:

C:\Users\Owner\AppData\Local\Android\sdk\tools\emulator.exe -netdelay none -netspeed full -avd Nexus_6_API_23
Warning: requested ram_size 1536M too big, reduced to 1024M
emulator: WARNING: Crash service did not start
emulator: WARNING: VM heap size set below hardware specified minimum of 384MB
emulator: WARNING: Setting VM heap size to 384MB
Hax is enabled
Hax ram_size 0x40000000
HAX is working and emulator runs in fast virt mode.
console on port 5554, ADB on port 5555

我在事件日志"窗口中看到以下内容:

I see the following in the Event Log window:

11:26:05 PM Gradle sync started
11:26:15 PM Gradle sync completed
11:26:16 PM Executing tasks: [:app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:mockableAndroidJar, :app:prepareDebugUnitTestDependencies]
11:26:34 PM Gradle build finished in 18s 266ms
11:35:55 PM Executing tasks: [:app:clean, :app:generateDebugSources, :app:generateDebugAndroidTestSources, :app:mockableAndroidJar, :app:prepareDebugUnitTestDependencies, :app:assembleDebug]
11:39:04 PM Gradle build finished with 3 error(s) in 3m 8s 551ms

我在Gradle Console窗口中看到以下内容:

I see the following in the Gradle Console window:

e: C:\Users\Owner\AndroidStudioProjects\WeatherApp\app\src\main\java\com\qtimemedia\weatherapp\MainActivity.kt: (5, 8): Unresolved reference: kotlinx
e: C:\Users\Owner\AndroidStudioProjects\WeatherApp\app\src\main\java\com\qtimemedia\weatherapp\MainActivity.kt: (12, 9): Unresolved reference: message

 FAILED

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:compileDebugKotlin'.
> Compilation error. See log for more details

* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.

BUILD FAILED

Total time: 3 mins 5.237 secs

在消息"部分中，我看到以下内容:

In the Messages section I see the following:

C:\Users\Owner\AndroidStudioProjects\WeatherApp\app\src\main\java\com\qtimemedia\weatherapp\MainActivity.kt
Error:(5, 8) Unresolved reference: kotlinx
Error:(12, 9) Unresolved reference: message
Error:Execution failed for task ':app:compileDebugKotlin'.
> Compilation error. See log for more details
Information:BUILD FAILED
Information:Total time: 3 mins 5.237 secs
Information:3 errors
Information:0 warnings
Information:See complete output in console

如何使应用正确编译?

推荐答案

请参阅以下响应: https://stackoverflow.com/a/36526153/256513

您需要将kotlin构建脚本部分从项目 build.gradle移至模块 build.gradle文件.

You need to move the kotlin buildscript section from your project build.gradle to your module build.gradle file.

这篇关于Kotlin Android App编译失败并显示消息:未解决的参考:kotlinx的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！