我使用dagger 2并试图将我的Android项目从Java翻译成Kotlin。成功构建后,我遇到了运行时错误:
MyFragmentSubcomponentBuilder未实现AndroidInjector.Factory
使用Java时没有出现此错误。而且我注意到在我的模块ActivityBuilder中,所有方法在构建后都未使用(它们必须在生成的子组件类中使用)。
@Module
abstract class ActivityBuilder {
// ...
@ContributesAndroidInjector(modules = arrayOf(MainActivityModule::class,MyFragmentProvider::class))
internal abstract fun bindMainActivity(): MainActivity // this method highlighted with gray color in AndroidStudio as unused
}
如何设置项目以正确使用dagger 2和kotlin?
我的顶级gradle.build:
buildscript {
ext.kotlin_version = '1.1.51'
repositories {
jcenter()
maven { url 'https://maven.google.com' }
mavenCentral()
google()
maven {
url 'https://github.com/uPhyca/stetho-realm/raw/master/maven-repo'
}
maven {
url "https://jitpack.io"
}
}
dependencies {
classpath 'com.android.tools.build:gradle:3.0.0'
classpath 'com.google.gms:google-services:3.1.0'
classpath "io.realm:realm-gradle-plugin:3.0.0"
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
// ...
app build.gradle:
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply plugin: 'kotlin-kapt'
apply plugin: 'kotlin-android-extensions'
apply plugin: 'realm-android'
android {
compileSdkVersion rootProject.ext.compileSdkVersion
buildToolsVersion rootProject.ext.buildToolsVersion
defaultConfig {
applicationId "com.example.app"
minSdkVersion rootProject.ext.minSdkVersion
targetSdkVersion rootProject.ext.targetSdkVersion
versionCode 1
versionName "1.0.0"
multiDexEnabled true
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
dataBinding {
enabled = true
}
kapt {
generateStubs = true
}
}
// ...
kapt {
generateStubs = true
}
dependencies {
// ...
kapt 'com.android.databinding:compiler:3.0.0'
//Dagger 2 dependencies
compile 'com.google.dagger:dagger:2.11'
compile 'com.google.dagger:dagger-android:2.11'
compile 'com.google.dagger:dagger-android-support:2.11'
kapt 'com.google.dagger:dagger-compiler:2.11'
kapt 'com.google.dagger:dagger-android-processor:2.11'
// ...
}
正如你所看到的,我没有使用annotationProcessor作为dagger 2(只有kapt),而且我还添加了generateStubs = true。但是我仍然在运行时遇到错误。
答案 0 :(得分:2)
将AndroidSupportInjectionModule
放入ApplicationComponent
例如
@Singleton
@Component(
modules = arrayOf(
AndroidSupportInjectionModule::class,
ActivityBuilder::class,
AppModule::class
)
)
interface AppComponent : AndroidInjector<App> {
@Component.Builder
abstract class Builder : AndroidInjector.Builder<App>()
}