android - retrofit 2 - 如何传递 POST json 对象

Question

所以，我有一个自定义对象列表，我需要一个像这样的 JSON:

{
"surveys": [{
    "survey": {
        "code": "05052017153632",
        "date": "05/05/2017 15:36:32",
        "device_id": 1,
        "questions_attributes": [{
            "kind": "string",
            "label": "Você encontrou tudo o que procurava?",
            "value": "Infelizmente, não"
        }, {
            "kind": "string",
            "label": "Em qual departamento você não encontrou o produto?",
            "value": "FERRAMENTAS, TAPETES"
        }, {
            "kind": "string",
            "label": "Deseja que a Havan entre em contato com você?",
            "value": "Não informado"
        }, {
            "kind": "string",
            "label": "Nome",
            "value": "Não informado"
        }, {
            "kind": "string",
            "label": "E-mail",
            "value": "Não informado"
        }, {
            "kind": "string",
            "label": "Telefone",
            "value": "Não informado"
        }]
    }
}]}

但我不知道如何使用 Gson 来完成它。我正在使用 Retrofit 2，需要将此 JSON 传递到正文请求中。有什么想法吗？

Answer 1

是的，您需要将此 JSON 传递到正文请求中。

改造接口(interface):

public interface RetrofitInterface<R extends RetrofitClass> {
    @Headers({"Content-Type: application/json", "Cache-Control: max-age=640000"})
    @POST("v1/auth/")

 public Call<ResponseBody> callLogin(@Query("key") String key, @Body LoginModel body);
    @Headers({"Content-Type: application/json", "Cache-Control: max-age=640000"})

    public static final Retrofit retrofit = new Retrofit.Builder()
            .baseUrl(AppConstants.mBaseUrl)
            .addConverterFactory(GsonConverterFactory.create())
            .build();
}

API调用 Activity :

使用@Body 参数将json 对象传递到body 请求中。

这里你可以在http://www.jsonschema2pojo.org/中创建gson模型类使用该 json 请求格式将 json 转换为 gson。

之后，使用该 gson pojo 类设置值，并将 json 对象传递给改造中的 body 请求。

例如:

登录模型:

public class LoginModel {
    @SerializedName("username")
    private String username;
    @SerializedName("password")
    private String password;
public String getUsername() {
    return username;
}
public void setUsername(String username) {
    this.username = username;
}
public String getPassword() {
    return password;
}
public void setPassword(String password) {
    this.password = password;
}
}

用 pojo 类设置值:

LoginModel model_obj = new LoginModel();
    mModel_obj.setUsername(mUsername);
    mModel_obj.setPassword(mPassword);

API调用:

Call<ResponseBody> call = service.callLogin(AppConstants.mApiKey, model_obj);
call.enqueue(new Callback<ResponseBody>() {
    @Override
    public void onResponse(Call<ResponseBody> call, Response<ResponseBody> response) {
    }
    @Override
    public void onFailure(Call<ResponseBody> call, Throwable t) {
    }
});