在 Kotlin 中将 object 改造为其他 activity

Question

正如我在标题中提到的，我正在尝试将我在 MainActivity 中使用的名为“服务”的 object 发送到 OtherActivity，但我没有成功。

Constant.kt

class Constants {

companion object{
    const val BASE_URL = "http://10.0.2.2:8080/customer/"
}
}

RetrofitInstance.kt

object RetrofitInstance {

private var retrofit: Retrofit? = null



fun getClient(username: String, password : String): Retrofit {

    val client =  OkHttpClient.Builder()
        .addInterceptor(BasicAuthInterceptor(username,password))
        .build()



    val gson = GsonBuilder().apply {
        setLenient()
        registerTypeAdapter(Date::class.java,
                JsonDeserializer<Date> { json, typeOfT, context ->
                    if(json.asJsonPrimitive.isNumber) {
                        Date(json.asJsonPrimitive.asLong * 1000)
                    } else {
                        null
                    }
                })
    }.create()


    if (retrofit == null)
        retrofit =  Retrofit.Builder()
                .baseUrl(BASE_URL)
                .client(client)
                .addConverterFactory(GsonConverterFactory.create(gson))
            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                .build()

    return retrofit as Retrofit
}
}

SimpleApi.kt

interface SimpleApi : Serializable{

@GET("list")
fun productList(): Call<MutableList<Product>>

@GET("api/data")
fun test(@Header("Authorization") autHeader: String): Call<String>


@GET("testc")
fun testCustomer(): Call<String>


@GET("cars")
fun getCars(): Call<List<Car>>

}

在 MainActivity.kt

中创建“服务”

    val service = RetrofitInstance.getClient(username,password).create(SimpleApi::class.java)

在 MainActivity.kt

中创建“意图”

                val intent = Intent(this@MainActivity,OtherActivity::class.java)
                intent.putExtra("service", service as Serializable)
                startActivity(intent)

在 OtherActivity.kt

中获取“意图”

val service = (intent.getSerializableExtra("service") as? SimpleApi)!!

Answer 1

您可以像下面这样更改您的RetrofitInstance

object RetrofitInstance {

    private var api: SimpleApi? = null


    fun createInstance(username: String, password: String): SimpleApi {
        val client = OkHttpClient.Builder()
                .addInterceptor(BasicAuthInterceptor(username, password))
                .build()


        val gson = GsonBuilder().apply {
            setLenient()
            registerTypeAdapter(Date::class.java,
                    JsonDeserializer<Date> { json, typeOfT, context ->
                        if (json.asJsonPrimitive.isNumber) {
                            Date(json.asJsonPrimitive.asLong * 1000)
                        } else {
                            null
                        }
                    })
        }.create()


        if (api == null)
            api = Retrofit.Builder()
                    .baseUrl(BASE_URL)
                    .client(client)
                    .addConverterFactory(GsonConverterFactory.create(gson))
                    .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
                    .build()
                    .create(SimpleApi::class.java)

        return api
    }

    fun getInstance() : SimpleApi {
        return api!!
    }
}

在您的 MainActivity 上调用 createInstace 函数来创建您的 api 实例。其他活动可以调用RetrofitInstance.getInstance()得到api.

在 Kotlin 中将 object 改造为其他 activity

Put retrofit object to other activity in Kotlin

android

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kotlin

retrofit