Retrofit 返回 200 响应代码,但我在访问字段时收到 null

时间:2021-01-30 07:36:11

标签: android kotlin mvvm retrofit2 dagger-hilt

我正在使用改造向 API 发出网络请求。响应代码返回 200,但我在尝试访问字段时收到 null。我已经检查了其他解决方案,但似乎无法解决我的问题。我正在使用 hilt

这是我的 API 类

interface BlockIOApi{

   @GET("/api/v2/get_balance/")
   suspend fun getBalance(
   @Query("api_key")
   apiKey: String = BuildConfig.API_KEY
   ): Response<BalanceResponse>
}

这是我的应用模块对象

<块引用>

应用模块

@Module
@InstallIn(ApplicationComponent::class)
object AppModule{
@Singleton
@Provides
fun provideOkHttpClient() = if (BuildConfig.DEBUG) {
    val loggingInterceptor = HttpLoggingInterceptor()
    loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY)
    OkHttpClient.Builder()
        .addInterceptor(loggingInterceptor)
        .build()
} else OkHttpClient
    .Builder()
    .build()


@Provides
@Singleton
fun providesRetrofit(okHttpClient: OkHttpClient): Retrofit =
    Retrofit.Builder()
        .addConverterFactory(GsonConverterFactory.create())
        .baseUrl(BASE_URL)
        .client(okHttpClient)
        .build()

@Provides
@Singleton
fun providesApiService(retrofit: Retrofit): BlockIOApi = retrofit.create(BlockIOApi::class.java)

}

最后这里是我的存储库,DefaultRepository.kt

class DefaultRepository @Inject constructor(
private val blockIOApi: BlockIOApi,
private val balanceDao: BalanceDao
):BlockIORepository {
override suspend fun getBalance(): Resource<BalanceResponse> {
  return try {
      val response = blockIOApi.getBalance()
      Log.d("TAG", "getBalance>>Response:${response.body()?.balance} ")
      if (response.isSuccessful){
          response.body().let {
              return@let Resource.success(it)
          }
      }else{
          Log.d("TAG", "getBalance: Error Response >>> ${response.message()}")
          Resource.error("An unknown error occured",null)
      }
  }catch (ex :Exception){
      Resource.error("Could not reach the server.Check your internet connection",null)
  }
}

还有这个接口,BlockIORepository.kt

interface BlockIORepository {
suspend fun getBalance(): Resource<BalanceResponse>
suspend fun insertBalance(balance: Balance)
suspend fun getCachedBalance(): Balance
suspend fun getAddresses(): Resource<DataX>
}

这是我的数据类

data class BalanceResponse(
val balance: Balance,
val status: String

)

@Entity
data class Balance(
    val available_balance: String,
    val network: String,
    val pending_received_balance: String,
    @PrimaryKey(autoGenerate = false)
    var id: Int? = null
)

enter image description here 当我尝试访问 data 对象时出现问题。我没有为 status 对象获取空值 我已经坚持了两天了。任何帮助将不胜感激。提前致谢。

2 个答案:

答案 0 :(得分:1)

您的班级应根据 json 命名或应提供 @SerializedName 所以你的 BalanceResponse 类应该是

data class BalanceResponse(
@SerializedName("data")
val balance: Balance,
@SerializedName("status")
val status: String
)

由于您试图将 data 保存在 balance 中,因此您必须提供 SerializedName,但如果它们具有相同的名称且大小写相同,那么解析器将自动识别它们。

答案 1 :(得分:1)

问题出现在这里:

data class BalanceResponse(
   val balance: Balance,  <-- in postman it is "data"
   val status: String
)

您应该考虑为您的班级添加 @SerializedName(xxx)

data class BalanceResponse(
   @SerializedName("data") val balance: Balance, 
   val status: String
)
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