android - 找不到类 databinding.FragmentBinding

Question

我试图在我的 fragment 中使用数据绑定(bind)，但在运行时出现以下错误:

Could not find class 'com.example.databinding.FragmentUpSellBinding', referenced from method com.example.UpSellFragment.onCreateView

结果为:

FATAL EXCEPTION: main Process: nl.anwb.fietsen.debug, PID: 5563                                                                     
java.lang.IllegalStateException: DataBindingUtil.inflate(…r,                                                                                     
false) must not be null`

我的 build.gradle 看起来像这样:

apply plugin: 'com.android.library'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'

android {
    dataBinding {
        enabled = true
    }
}
kapt {
    generateStubs = true
}

dependencies {
    kapt 'com.android.databinding:compiler:3.0.0-alpha4'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
}

主要的buid.gradle

buildscript {
    ext.kotlin_version = '1.1.2-4'
    ext{
        supportLibraryVersion = '25.3.1'
    }
    repositories {
        maven { url 'https://maven.google.com' }
        jcenter()
    }
    dependencies {
        classpath 'com.android.tools.build:gradle:3.0.0-alpha4'
        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
    }
}

有谁知道我该如何解决这个问题？

Answer 1

你不需要 build.gradle

    dataBinding {
        enabled = true
    }

删除并尝试

apply plugin: 'com.android.library'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'kotlin-kapt'


kapt {
    generateStubs = true
}

dependencies {
    kapt 'com.android.databinding:compiler:3.0.0-alpha4'
    implementation "org.jetbrains.kotlin:kotlin-stdlib-jre7:$kotlin_version"
}

并将您的 Kotlin 更新为

ext.kotlin_version = '1.1.3-2'