Question

我想通过改型添加自签名证书，因为我需要传递上下文，但是在通过MVC模型传递上下文时会遇到一些问题

改造客户

object RetrofitClient    {
  fun call(context: Context): Webservice {
    val webservice by lazy {
        Retrofit.Builder()
            //  .baseUrl("http://68.183.183.255:8080")
            //.baseUrl("http://my-json-server.typicode.com")
            .baseUrl("https://54roh005p5.execute-api.us-west-2.amazonaws.com/mdv/cloud/login/")
            .addConverterFactory(GsonConverterFactory.create(GsonBuilder().create()))
            .addConverterFactory(ScalarsConverterFactory.create())
            .client(SelfSigningClientBuilder.createClient(context))
            .build().create(Webservice::class.java)
    }
    return webservice
  }
}

存储库

class TodoRepository(context:Context) {

   private var client:Webservice = RetrofitClient.call(context)
   //suspend fun getTodo(id: String) = client.getTodo(id)
   suspend fun getTodo(id: User) = client.getTodo(id)
}

ViewModel

class NetworkViewModel(context: Context) : ViewModel() {

  var repository: TodoRepository  = TodoRepository(context)
  fun getTodo(arg : User):LiveData<Response<com.example.myapplication.entity.UserData>> {
    val result = liveData(Dispatchers.IO) {
        val retrivedTodo = repository.getTodo(arg)

        emit(retrivedTodo)
      }
    return result
   }
}

MainActivity

networkViewModel=ViewModelProviders.of(this).get(NetworkViewModel(this)::class.java)

出现错误

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapplication/com.example.myapplication.MainActivity}: java.lang.RuntimeException: Cannot create an instance of class com.example.myapplication.network.NetworkViewModel

我在做什么错。如果有更好的方法，请建议

Answer 1

不要通过构造函数初始化ViewModel对象：-NetworkViewModel(this)::class.java是错误的。使用：-

 networkViewModel = ViewModelProviders.of(this).get(NetworkViewModel::class.java)

Answer 2

您可以自定义您的OkHttpClients sslSocketFactory

例如（{Retrofit的客户端设置）

val retrofit Retrofit
    .Builder()
    .client(client)
    .baseUrl(BASE_URL)
    .addConverterFactory(GsonConverterFactory.create(gson))
    .build()

例如（OkHttpsClient的sslSocketFactory设置）

  val client =OkHttpClient.Builder()
            .sslSocketFactory(sslContextWithSS.getSocketFactory())
            .build()

例如（带有自定义证书的SSLSocketFactory）

        val keyStore = readKeyStore() //your method to obtain KeyStore
        val sslContext = SSLContext.getInstance("SSL")
        val trustManagerFactory = TrustManagerFactory.getInstance(getDefaultAlgorithm())
        trustManagerFactory.init(keyStore)
        val keyManagerFactory = KeyManagerFactory.getInstance(KeyManagerFactory.getDefaultAlgorithm())
        keyManagerFactory.init(keyStore, "keystore_pass".toCharArray())
        sslContext.init(keyManagerFactory.getKeyManagers(), trustManagerFactory.getTrustManagers(), SecureRandom())
        client.setSslSocketFactory(sslContext.getSocketFactory())

通过KeyStore获得CustomCertificate

 fun readKeyStore()= KeyStore.getInstance(KeyStore.getDefaultType()).also{
  try (val inputStream = context.getResources().openRawResource(R.raw.custom_certificate)) {
        it.load(inputStream, getPassword());
    }
}

Answer 3

宁可在类之间传递上下文，最好创建一个应用程序类并在需要时使用此应用程序上下文。请检查以下内容：

<ReactPlayer
    url='https://www.youtube.com/watch?v=mFJZ0HaYYB8'
    config={{
        youtube: {
             playerVars: { modestbranding: 1 }
        }
    }}
/>

然后，在class MainApplication : Application() { companion object { private lateinit var instance: MainApplication fun applicationContext() : Context { return instance.applicationContext } } override fun onCreate() { super.onCreate() instance = this } }的application标签中添加此AndroidManifest

然后调用MainApplication.applicationContext（）从任何地方获取Context。

使用改造电话添加自签名证书

3 个答案: