Android Retrofit - POST request doesn't work,

This is the error I'm getting:

com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was STRING at line 1 column 1 path $

JSON response I'm getting from Postman:

{
  "title": "test title",
  "body": "test body",
  "userId": 1,
  "id": 101
}

This is how I echoed the response from the rest API (used slim2 framework):

$app->post('/posts', function() use($app){
    $res = array(
        "title" => $app->request->post('title'),
        "body" => $app->request->post('body'),
        "userId" => 1,
        "id" => 101
        );
    echoResponse(201, $res);
});

echoResponse method:

function echoResponse($status_code, $response) {
    $app = \Slim\Slim::getInstance();
    $app->status($status_code);
    $app->contentType('application/json');

    echo json_encode($response);
}

The method where I call the API:

public void sendPost(String title, String body) {
    mAPIService.savePost(title, body, 1).enqueue(new Callback<Post>() {
        @Override
        public void onResponse(Call<Post> call, Response<Post> response) {
            Log.i(TAG, "post sendPost to onResponse.");
            if(response.isSuccessful()) {
                showResponse(response.body().toString());
                Log.i(TAG, "post submitted to API." + response.body().toString());
            }
        }

        @Override
        public void onFailure(Call<Post> call, Throwable t) {
            Log.e(TAG, "Unable to submit post to API.");
            Log.e(TAG, t.toString());
        }
    });
}

The APIServie interface:

public interface APIService {
@POST("/posts")
@FormUrlEncoded
Call<Post> savePost(@Field("title") String title,
                    @Field("body") String body,
                    @Field("userId") long userId);
}

How I got the retrofit instance:

mAPIService = ApiUtils.getAPIService();
public class ApiUtils {
    private ApiUtils() {}
    public static final String BASE_URL = "http://myurl/v1/";

    public static APIService getAPIService() {
        return RetrofitClient.getClient(BASE_URL).create(APIService.class);
    }

}
public class RetrofitClient {
   private static Retrofit retrofit = null;

   private static Gson gson = new GsonBuilder()
        .setLenient()
        .create();

   public static Retrofit getClient(String baseUrl) {
      if (retrofit==null) {
        retrofit = new Retrofit.Builder()
                .baseUrl(baseUrl)
                .addConverterFactory(GsonConverterFactory.create(gson))
                .build();
      }
      return retrofit;
   }
}

Reason I posted all this was I couldn't find where the problem is because JSON response I'm getting from API looks ok, the way I called the API looks ok. There are many questions related to this can be found here. But I couldn't find the answer to my problem. Please find me a solution to this. Thanks

EDIT : @Darpan and @Fred was right. I enabled the logging for retrofit. this is what it says

D/OkHttp: --> POST http://myurl/posts http/1.1
D/OkHttp: Content-Type: application/x-www-form-urlencoded
D/OkHttp: Content-Length: 26
D/OkHttp: title=vz&body=gde&userId=1
D/OkHttp: --> END POST (26-byte body)
D/OkHttp: <-- 200 OK http://mywebsite/404/
    <html of my 404 page>
D/OkHttp: <-- END HTTP (2119-byte body)

It's giving me my servers' 404.html file as the response. but When I call the same API from POSTMAN it's giving me the desired result.

So basically I can access and get the result from POSTMAN but cannot consume it from Android app using retrofit

Any idea how to fix it? what can be the problem?

标签： android retrofit retrofit2 slim postman

2条回答

我想做一个坏孩纸

2楼-- · 2019-07-04 02:30

Remove the last / from your base url http://myurl/v1/

That's why it is throwing 404.

0人赞添加讨论(0) 举报

太酷不给撩

3楼-- · 2019-07-04 02:38

Create bellow class and change Call<Post> to Call<MyResponse>

public class MyResponse {

    @SerializedName("result")
    private String result;

    @SerializedName("data")
    private Data data;

    public class Data {

        @SerializedName("title")
        @Expose
        private String title;

        @SerializedName("body")
        @Expose
        private String body;

        @SerializedName("userId")
        @Expose
        private String userId;

        @SerializedName("id")
        @Expose
        private String id;

        public String getTitle() {
            return title;
        }

        public void setTitle(String title) {
            this.title = title;
        }

        public String getBody() {
            return body;
        }

        public void setBody(String body) {
            this.body = body;
        }

        public String getUserId() {
            return userId;
        }

        public void setUserId(String userId) {
            this.userId = userId;
        }

        public String getId() {
            return id;
        }

        public void setId(String id) {
            this.id = id;
        }
    }

    public String getResult() {
        return result;
    }

    public void setResult(String result) {
        this.result = result;
    }

    public Data getData() {
        return data;
    }

    public void setData(Data data) {
        this.data = data;
    }
}

Your should change your json format like this

{
    "result" : "success",
    "data" : {
            "title":"title",
            "body":"body",
            "user_id":"userid",
            "id":"id"
    }   
}

Now you can access it in response like this MyResponse res= response.body();

And also print response like this Log.d("response", new Gson().toJson(res));

0人赞添加讨论(0) 举报

Android Retrofit - POST request doesn't work,

采纳回答

编辑标签

举报内容

检举类型

检举原因

检举说明(必填)

打开微信“扫一扫”，打开网页后点击屏幕右上角分享按钮

付费偷看金额在0.1-10元之间