这是在项目中使用kotlin开发遇见的问题

1 Unresolved reference: java

在项目的gradle中

buildscript {    repositories {        jcenter()        maven {            url 'https://maven.google.com/'            name 'Google'        }        mavenCentral()    }    ext.kotlin_version = '1.2.41'    dependencies {        classpath 'com.android.tools.build:gradle:2.3.2'                //kotlin        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"          }}

2调用kotlin 文件出现包名找不到

在app 的gradle中配置

apply plugin: 'kotlin-android'apply plugin: 'kotlin-android-extensions'

3 Unresolved reference: databinding

databinding和kotlin冲突

在项目的build.gradle中

ext.android_plugin_version = '2.3.0' 下边是完整配置 buildscript {    repositories {        jcenter()        maven {            url 'https://maven.google.com/'            name 'Google'        }        mavenCentral()    }    ext.kotlin_version = '1.2.51'    ext.android_plugin_version = '2.3.0'    dependencies {        classpath 'com.android.tools.build:gradle:2.3.2'         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"    }}

在app build.gradle中添加

apply plugin: 'kotlin-kapt'android{      sourceSets {        main.java.srcDirs += 'src/main/kotlin'    }}kapt {    generateStubs = true}dependencies {        kapt "com.android.databinding:compiler:$android_plugin_version"}