对象中的Android通行证上下文

Question

我需要将应用程序上下文传递给一个对象。这是为了在我的连接服务okhttpClient中调用一个要拦截的函数。我正在使用一个对象类来构建与服务器的连接，并对其进行了改造，并为我的服务提供了一个外部接口。

object DfreeApiService  {
private lateinit var interceptor: HttpLoggingInterceptor
private lateinit var okHttpClient: OkHttpClient
private lateinit var networkConnectivityInterceptor: NetworkConnectivityInterceptor
val client: Retrofit
get() {
networkConnectivityInterceptor= NetworkConnectivityInterceptor() //cannot pass the context here
interceptor = HttpLoggingInterceptor()
interceptor.level = HttpLoggingInterceptor.Level.BODY
okHttpClient= OkHttpClient.Builder()
// .addInterceptor(networkConnectivityInterceptor)
.addInterceptor(interceptor)
.connectionSpecs(
Arrays.asList(ConnectionSpec.MODERN_TLS, ConnectionSpec.CLEARTEXT)
)
.followRedirects(true)
.followSslRedirects(true)
.retryOnConnectionFailure(true)
.connectTimeout(20, TimeUnit.SECONDS)
.readTimeout(20, TimeUnit.SECONDS)
.writeTimeout(20, TimeUnit.SECONDS)
.cache(null)
.build()
val retrofit: Retrofit =Retrofit.Builder()
.client(okHttpClient)
.baseUrl("http://example:2000/")
.addConverterFactory(GsonConverterFactory.create())
.build()
return retrofit
}
}

下面的代码是我的接口：

interface AuthenticationApi {
@POST("ws/login")
suspend fun login(@Body userInfo: UserInfo): Response<UserReponse>
@POST("ws/register")
suspend fun register(@Body userInfo: UserRegister): Response<UserReponse>
@POST("ws/pw_recover")
suspend fun pw_recover(@Body email: String): Response<BaseResponse>
@POST("ws/login")
suspend fun loginGoogle(@Body user: GoogleUser) : Response<UserReponse>

companion object{
operator fun invoke():AuthenticationApi{
return DfreeApiService.client.create(AuthenticationApi::class.java)
}
}
}

我正在使用mvvm和kodein。如果没有互联网拦截器，当没有互联网时，应用程序就会崩溃。我的拦截器：

class NetworkConnectivityInterceptor(
context: Context
) : Interceptor {
private val applicationContext = context
@RequiresApi(Build.VERSION_CODES.M)
override fun intercept(chain: Interceptor.Chain): Response {
if (!isInternetAvailable())
throw NoInternetException("Make sure you have an active data connection")
return chain.proceed(chain.request())
}
@RequiresApi(Build.VERSION_CODES.M)
private fun isInternetAvailable(): Boolean {
var result = false
val connectivityManager =
applicationContext.getSystemService(Application.CONNECTIVITY_SERVICE) as ConnectivityManager?
connectivityManager?.let {
it.getNetworkCapabilities(connectivityManager.activeNetwork)?.apply {
result = when {
hasTransport(NetworkCapabilities.TRANSPORT_WIFI) -> true
hasTransport(NetworkCapabilities.TRANSPORT_CELLULAR) -> true
else -> false
}
}
}
return result
}
}

感谢您的关注

Answer 1

在主活动中：

class ExampleApplication : Application(), KodeinAware {
lateinit var context: Context
override val kodein = Kodein.lazy {
import(androidXModule(this@ExampleApplication))
bind() from singleton { ExampleApiService }
bind() from singleton { AuthenticationApi() }
bind() from singleton { NetworkConnectivityInterceptor(instance()) }
bind() from singleton { ExampleDataBase(instance()) }
bind<UserRepository>() with singleton { UserRepository(instance(), instance()) }
bind() from provider { AuthenticationLoginViewModelFactory(instance(),instance()) }
bind() from provider { CreateAccountViewModelFactory(instance(),instance()) }
bind() from provider { PasswordViewModelFactory(instance(),instance()) }
}
override fun onCreate() {
super.onCreate()
DfreeApiService.init(this)
}

}

在对象DfreeApiSercive:中

object DfreeApiService  {
private lateinit var application: Application
fun init(application: Application){
this.application=application
}
private lateinit var interceptor: HttpLoggingInterceptor
private lateinit var okHttpClient: OkHttpClient
private lateinit var networkConnectivityInterceptor: NetworkConnectivityInterceptor

val client: Retrofit
get() {
networkConnectivityInterceptor= NetworkConnectivityInterceptor(application.applicationContext)
interceptor = HttpLoggingInterceptor()
interceptor.level = HttpLoggingInterceptor.Level.BODY
okHttpClient= OkHttpClient.Builder()
.addInterceptor(networkConnectivityInterceptor)
.addInterceptor(interceptor)
...
}
}

通过这种方式，您可以将上下文导入到对象中。