我想在我的基于Maven的项目中使用Kotlin Android extensions,但是尽管在我的Maven插件集中添加了kotlin-android-extensions
,但它还是没有。
我的,我认为相当简单,设置如下:
.
├── AndroidManifest.xml
├── pom.xml
├── res
│ └── layout
│ └── main_activity.xml
└── src
└── activity.kt
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.KotlinAndroid"
android:versionCode="1"
android:versionName="0.1-SNAPSHOT">
<uses-sdk
android:minSdkVersion="14"
android:targetSdkVersion="19" />
<application android:label="Hello Kotlin">
<activity android:name=".activity.MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>
pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.example.KotlinAndroid</groupId>
<artifactId>hello-kotlin</artifactId>
<packaging>apk</packaging>
<name>hello-kotlin</name>
<version>0.1-SNAPSHOT</version>
<dependencies>
<dependency>
<groupId>com.google.android</groupId>
<artifactId>android</artifactId>
<version>4.1.1.4</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib</artifactId>
<version>1.0.0</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>com.jayway.maven.plugins.android.generation2</groupId>
<artifactId>android-maven-plugin</artifactId>
<version>3.8.2</version>
<configuration>
<sdk>
<platform>19</platform>
</sdk>
<undeployBeforeDeploy>true</undeployBeforeDeploy>
</configuration>
<extensions>true</extensions>
</plugin>
<plugin>
<artifactId>kotlin-maven-plugin</artifactId>
<groupId>org.jetbrains.kotlin</groupId>
<version>1.0.0</version>
<executions>
<execution>
<id>compile</id>
<phase>process-sources</phase>
<goals>
<goal>compile</goal>
</goals>
</execution>
<execution>
<id>test-compile</id>
<phase>process-test-sources</phase>
<goals>
<goal>test-compile</goal>
</goals>
</execution>
</executions>
</plugin>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-android</artifactId>
<version>1.0.0</version>
</plugin>
<plugin>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-android-extensions</artifactId>
<version>1.0.0</version>
</plugin>
<!-- I needed to add this plugin otherwise my Kotlin source
files are not found -->
<plugin>
<groupId>org.codehaus.mojo</groupId>
<version>1.10</version>
<artifactId>build-helper-maven-plugin</artifactId>
<executions>
<execution>
<phase>generate-sources</phase>
<goals><goal>add-source</goal></goals>
<configuration>
<sources>
<source>src</source>
</sources>
</configuration>
</execution>
</executions>
</plugin>
</plugins>
</build>
</project>
res/layout/main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_height="wrap_content"
android:layout_width="match_parent"
android:text="Hello World!"
android:id="@+id/textView" />
</LinearLayout>
src/activity.kt
package com.example.KotlinAndroid.activity
import android.os.Bundle
import android.app.Activity
import com.example.KotlinAndroid.R
class MainActivity() : Activity() {
protected override fun onCreate(savedInstanceState : Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.main_activity)
}
}
所以这一切都有效,直到我将activity.kt
更改为导入kotlinx.android.synthetic.main.main_activity.*
而不是import com.example.KotlinAndroid.R
,然后失败
[错误]
hello-kotlin/src/activity.kt
:( 6,8) 未解决的参考文献:kotlinx
[错误]
hello-kotlin/src/activity.kt
:( 12,24) 未解决的参考文献:R
我发现此问题的所有解决方案仅适用于Gradle版本,在这种情况下,显然添加kotlin-android-extensions
插件就足够了。但是,在我的Maven-only构建中,我的插件列表中已经有kotlin-android-extensions
(请参阅pom.xml
文件);然而Kotlin并没有产生所需的kotlinx.*
类。
答案 0 :(得分:1)
kotlin-android-extensions现在是kotlin-gradle插件的一部分。 kotlin-maven插件现在根本不支持android。您的智能设备中有issue可以投票。