1. 首先是Unresolved reference: databinding这个东西。
    折腾过程不说了，贴出项目的的build.gradle

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    buildscript {
        ext.kotlin_version = '1.1.51'
        ext.android_plugin_version = '3.0.0'  
        repositories {
            jcenter()
        }
        dependencies {
            classpath 'com.android.tools.build:gradle:3.0.0'
            classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
            // NOTE: Do not place your application dependencies here; they belong
            // in the individual module build.gradle files
        }
    }

    allprojects {
        repositories {
            jcenter()
            maven { url "https://jitpack.io" }
            maven { url 'https://dl.google.com/dl/android/maven2/' }
        }
    }

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

    然后在module的build.gradle里加上

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    kapt {
            generateStubs = true
        }

  2. 编译之后，发现GlideApp找不到了，怎么都生成不了。难道这也是kotlin的锅？
    好吧，既然java的注解生成不了，那么用kotlin来

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    //annotationProcessor 'com.github.bumptech.glide:compiler:4.2.0'
    kapt 'com.github.bumptech.glide:compiler:4.2.0'

    然后将glidemodule注解的java类改成kotlin类
    按下CTRL+F9 make project
    全部解决。