Json 不会到达

Json wont arrive

我的朋友编写了 API,我必须在 Android 上编写前端代码。但是 json 不会到达。我知道我的代码有效,因为我在 3 个不同的测试仪上对其进行了测试,他的 api 也有效。他也测试了几次。但是,如果我向没有数据发送任何数据。请求到达但数据未到达。响应也有效,但它总是说字符串为空。我在自己的计算机上托管 api。可能是虚拟设备无法向其托管的电脑发送任何内容吗?我希望有人能帮助我。

这是我的代码:

主要活动

 public void post(String pswd, String name){
    TextView textViewResult = findViewById(R.id.responses);
    Post post = new Post(name,pswd);

    HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();
    loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);

    OkHttpClient okHttpClient = new OkHttpClient.Builder()
            .addInterceptor(loggingInterceptor)
            .build();

    Retrofit retrofit = new Retrofit.Builder()
            .baseUrl("http://localhost:5000")
            .addConverterFactory(GsonConverterFactory.create())
            .client(okHttpClient)
            .build();

    API api = retrofit.create(API.class);

    Call<Post> call = api.createPost(post);
    call.enqueue(new Callback<Post>() {
        @Override
        public void onResponse(Call<Post> call, Response<Post> response) {
            if(!response.isSuccessful()){
                textViewResult.setText("Code: " + response.code());
                return;
            }
            Post postResponse = response.body();
            String content = "";
            content += "Code: " + response.code() + "\n";
            content += "token: " + postResponse.getToken() + "\n";
            content+= "msg: " +postResponse.getMsg();

                Endcontent = content;
        }

        @Override
        public void onFailure(Call<Post> call, Throwable t) {
            Endcontent = t.getMessage();

        }

    });

}

Api:

import java.util.List;

import retrofit2.Call;
import retrofit2.http.Body;
import retrofit2.http.FormUrlEncoded;
import retrofit2.http.GET;
import retrofit2.http.POST;

public interface API {
    @GET("posts")
    Call<List<Get>> getPosts();


    @POST("api/gen_token")
    Call<Post> createPost(@Body Post post);


}

和Post:

public class Post {
    private String name;
    private String pswd;
    private String token;
    private String msg;

    public Post(String name, String pswd) {
        this.name = name;
        this.pswd = pswd;
    }

    public String getPswd() {
        return pswd;
    }
    public String getMsg(){
        return msg;
    }

    public String getName() {
        return name;
    }

    public String getToken() {
        return token;
    }
}

检查您分配给它们的字符串名称和字符串密码值