java - Kotlin 的 Intent

Question

为什么我不能只写 class.kotlin 而不是写 class.java。 因为 AndroidMeActivity 是一个 kotlin 类，所以当我写这个时出现错误 ("Unsoloved refrence: java")，

我该如何解决。

 val intent = Intent(this, AndroidMeActivity::class.java)

Answer 1

"Unsoloved refrence: java"

阅读Reflection

Reflection is a set of language and library features that allows for introspecting the structure of your own program at runtime.

确保，您添加了 org.jetbrains.kotlin:kotlin-gradle-plugin

buildscript {
    ext.kotlin_version = '1.2.30'
    ext.gradle_version = '3.0.1'

    repositories {
        mavenCentral()
    }

    dependencies {
        classpath "com.android.tools.build:gradle:$gradle_version"
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

并检查您在下面添加的模块级别 build.gradle

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