Hilt的基本使用

• 第一步,需要在build.gradle中配置Hilt的插件路径:

  buildscript {
    ...
    dependencies {
        ...
        classpath 'com.google.dagger:hilt-android-gradle-plugin:2.28-alpha'
    }
  }

• 第二步,在app/build.gradle中添加Hilt依赖库与引入插件

  plugins{
    id:'kotlin-kapt',
    id:'dagger.hilt.android.plugin'
  }
  ...
  dependencies {
    implementation "com.google.dagger:hilt-android:2.28-alpha"
    kapt "com.google.dagger:hilt-android-compiler:2.28-alpha"
  }

• 必须自定义Application,否则Hilt将无法正常工作 ```kotlin @HiltAndroidApp class MyApplication : Application() { }

```kotlin
<application
    android:name=".MyApplication"
    ...>
</application>

• Hilt一共支持6个入口点,分别是
  • Application
  • Activity
  • Fragment
  • View
  • Service
  • BroadcastReceiver
• Hilt中的InstallIn支持7中组件类型
  • @ApplicationComponent:Application
  • @ActivityRetainedComponent:ViewModel
  • @ActivityComponent:Activity
  • @FragmentComponent:Fragment
  • @ViewComponent:View
  • @ViewWithFragmentComponent:View annotated with @WithFragmentBindings
  • @ServiceComponent:@Service

只有Application这个入口点是使用@HiltAndroidApp注解来声明的,其余全部都是@AndroidEntryPoint