项目环境 android studio 2.2.2
首先安装 Kotlin插件
然后重新启动 Android Studio
module build 文件 在buildscript级下
代码语言:javascript复制 dependencies {
classpath 'com.android.tools.build:gradle:2.2.2'
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
}
app的 build文件 跟android同级
代码语言:javascript复制buildscript{
ext.kotlin_version = '1.0.1-2'
repositories{
jcenter()
}
dependencies {
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
}
}
android下
代码语言:javascript复制sourceSets {
main.java.srcDirs = 'src/main/kotlin'
}
dependencies 引入包
代码语言:javascript复制compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
添加的有
注意的是要在 module 的build文件下添加 要不会报Error:(6, 8) Unresolved reference: kotlinx 这个错误
代码语言:javascript复制apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
buildscript{
ext.kotlin_version = '1.0.1-2'
repositories{
jcenter()
}
dependencies {
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
classpath "org.jetbrains.kotlin:kotlin-android-extensions:$kotlin_version"
}
}
android {
compileSdkVersion 25
buildToolsVersion "25.0.2"
defaultConfig {
applicationId "com.project.kotlintext"
minSdkVersion 15
targetSdkVersion 25
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
sourceSets {
main.java.srcDirs = 'src/main/kotlin'
}
}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile "org.jetbrains.kotlin:kotlin-stdlib:$kotlin_version"
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.1'
testCompile 'junit:junit:4.12'
}
转换代码 选中需要转换的Java文件, 如MainActivity.java, 使用Ctrl Shift A, 启动Action, 输入Convert Kotlin, 找到命令, 即可转换
点击后就会转换 然后转换成功就会有这样的图标
然后在MainActivity.kt
代码语言:javascript复制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)
name_tv.text="hello world!";
}
}
然后点击运行查看是否成功
要是觉得我写的配置看不懂 我写了个小例子 可以直接看配置文件 https://github.com/shaomiao/KotlinText