简要介绍

Koin是一个Kotin极轻量的依赖注入框架，据官方资料显示，它无代理，无代码生成，无反射。

把玩手法

1. 添加依赖

//Koin for android
implementation "org.koin:koin-android:2.0.0-rc-1"
//Koin for scope feature
implementation "org.koin:koin-android-scope:2.0.0-rc-1"
//Koin for viewModel feature
implementation "org.koin:koin-android-viewmodel:2.0.0-rc-1"

2. 添加正常的业务逻辑相关类(与Koin无关)

interface UserRepo {
    fun getName(): String
}

class UserRepoImpl : UserRepo {
    override fun getName(): String {
        return "jerry"
    }
}

class UserPresenter(val repo: UserRepo) {
    fun sayHi() = "Hi,${repo.getName()}"
}

3. 添加module(敲黑板啦,伴侣关系就是在这里建立的,相守一生,哈哈)

val appModule = module {
    single<UserRepo> { UserRepoImpl() }
    factory { UserPresenter(get()) }
}

4. 通知boss,初始化

class App : Application() {
    override fun onCreate() {
        super.onCreate()
        startKoin {
            androidLogger()
            androidContext(this@App)
            modules(appModule)
        }
    }
}

5. 随便玩

• 玩法一

class MainActivity : AppCompatActivity() {
    private val userPresenter: UserPresenter by inject()
    override fun onCreate(savedInstanceState: Bundle?) {
        val msg = userPresenter.sayHi()
    }
}

• 玩法二,随便get都行

val userPresenter: UserPresenter = get()
val msg = userPresenter.sayHi()

Demo源代码

https://github.com/cxyzy1/koinDemo

介绍完毕,诸君随意.

附录

官网介绍: https://beta.insert-koin.io/docs/2.0/getting-started/introduction/

安卓开发技术分享: https://www.jianshu.com/p/442339952f26
点击关注专辑,查看最新技术分享
更多技术总结好文，请关注：「程序园中猿」