带有 API 的 Android HTTP 标头

Question

如果我想发布请求和响应，标头有什么用？ 怎么可能在那里“保存”令牌？

我找不到任何好的解释。

Answer 1

您可以使用 Retrofit 调用 api 并将令牌存储到共享首选项中，并将通用标头添加到 OkhttpClient

        val prefs = Prefs.getInstance();

        val httpClient = OkHttpClient.Builder()
        httpClient.addInterceptor { chain ->
            val original = chain.request()
            val request = original.newBuilder()
                .header("Authorization", prefs.token)
                .header("Accept", "application/json")
                .method(original.method, original.body)
                .build()
            chain.proceed(request)
        }
        val interceptor = HttpLoggingInterceptor()
        interceptor.level = HttpLoggingInterceptor.Level.BODY
        httpClient.addInterceptor(interceptor)

        val client = httpClient.build()

并像这样制作 Retrofit 对象

Retrofit.Builder()
            .baseUrl(BASE_URL)
            .addConverterFactory(
                GsonConverterFactory.create(
                    GsonBuilder().setPrettyPrinting().create()
                )
            )
            .client(client).build()