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I find same problem this Android Retrofit - POST request doesn't work, but in Postman it works

But I could not solve it

this is gradle

compile 'com.squareup.retrofit2:retrofit:2.3.0' compile 'com.squareup.retrofit2:converter-gson:2.3.0' compile 'com.squareup.okhttp3:okhttp:3.8.0' compile 'com.google.code.gson:gson:2.8.0'

this is my code to post request in android

static final String URL = "http://localhost:3000/"; public void map(){ Retrofit retrofit = new Retrofit.Builder() .baseUrl(URL) .addConverterFactory(GsonConverterFactory.create()) .build(); Map map = new HashMap(); map.put("gender", UserSex); map.put("age", UserAge); map.put("name", UserName); map.put("password", UserPw); map.put("email", UserEmail); GitHubService gitHubService = retrofit.create(GitHubService.class); Call<RetrofitRepo> call = gitHubService.getUserItem(map); call.enqueue(new Callback<RetrofitRepo>() { @Override public void onResponse(Call<RetrofitRepo> call, Response<RetrofitRepo> response) { try { RetrofitRepo repoList = response.body(); String message = repoList.getmessage(); String token = repoList.gettoken(); if (message.equals("registered successfully")) { Intent intent = new Intent(UserEnroll.this, LoginActivity.class); startActivity(intent); Toast.makeText(context, "register success.", Toast.LENGTH_SHORT).show(); } else { Toast.makeText(context, "register failed.", Toast.LENGTH_SHORT).show(); } }catch (Exception e){ e.printStackTrace(); } } @Override public void onFailure(Call<RetrofitRepo> call, Throwable t) { } }); }

and this is interface

public interface GitHubService { @FormUrlEncoded @POST("api/auth/login") Call<RetrofitRepo> getPost( @Field("username") String username ); @FormUrlEncoded @POST("api/auth/placeSearch") Call<RetrofitRepo> getPlaceID( @Field("placeID") String placeID ); @FormUrlEncoded @POST("api/auth/login") Call<RetrofitRepo> getItem( @FieldMap Map<String, String> option ); @FormUrlEncoded @POST("api/auth/register") Call<RetrofitRepo> getUserItem( @FieldMap Map<String, String> option );

}

i use node js this is response code

exports.register = (req, res) => { const { email, password, name, age, gender } = req.body let newUser = null const create = (user) => { if(user) { throw new Error('email exists') } else { return User.create(email, password, name, age, gender) } } const count = (user) => { newUser = user return User.count({}).exec() } const assign = (count) => { if(count === 1) { return newUser.assignAdmin() } else { return Promise.resolve(false) } } const respond = (isAdmin) => { res.json({ message: 'registered successfully', admin: isAdmin ? true : false }) } const onError = (error) => { res.status(409).json({ message: error.message }) } User.findOneByEmail(email) .then(create) .then(count) .then(assign) .then(respond) .catch(onError)}

I requested using a postman and it worked 

http://localhost:3000/api/auth/register { "email": "[email protected]", "password": "abc123@", "name": "user", "age": "18", "gender": "F"}

POST /api/auth/register 409 13.393 ms - 26 or POST /api/auth/register 200 15.064 ms - 51 it responded in node

but its not work on my android app using retrofit and not responded in node

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  • Can you share the what's coming in the log? Commented Apr 24, 2018 at 5:22
  • try using @Body in @POST("api/auth/register") Call<RetrofitRepo> getUserItem(@Body RequestBody option); Commented Apr 24, 2018 at 5:52
  • What you are getting in response? any response code like 400.... Commented Apr 24, 2018 at 5:53
  • Can you show how you are making API call in post man(span)? Commented Apr 24, 2018 at 5:54
  • for me it was filesize issue please see stackoverflow.com/a/55913121/3904109 Commented Apr 30, 2019 at 2:26

2 Answers 2

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2
  1. Check Whether you had put your Server OnLine
  2. Verify the URL that you had Requested is Correct.
  3. If you are using Emulator use IP as 10.0.2.2 and if a real device is using use same network and use IP of the System

static final String URL = "http://IPADRESSOFSERVER:3000/";

For Emulator use static final String URL = "http://10.0.2.2:3000/";

Use same network for connecting to local network. and Use the Ip Adderess of the System. Turn off the System Firewall and Antivirus too.

Open your browser (Chrome Recommended) and type "http://IPADRESSOFSERVER:3000/someWebpageHOstedOnline". IF it is accessable check the retrofit call. else the Device cant create connection to the server

Add

app.get('/test',function(req,res){ res.send(Hello This is a Test); });

in your js file and try accessing http://IPADRESSOFSERVER:3000/test

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11 Comments

i checked that 1. yes server is online 2. URL is correct 3. i'm not using emulator and i try my ip but its not work.. thank you for your suggestions. if you know other solution please tell me
@Jshin Open your browser (Chrome Recommended) and type "IPADRESSOFSERVER:3000/someWebpageHOstedOnline". IF it is accessable check the retrofit call. else the Device cant create connection to the server. This is to check whether device is connecting to the Server properly .
use ipadress of the system always instead of localhost. And make sure that the port is open for extenal connection by turning of firwall ad by adding inbound law
@Jshin may be your firewall blocks an outside request. Check it by the above method.
really thank you! i turn off the window firewall, antivirus and i restart server its work! Thank you so much bro!
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Your need to user your computer or laptop's IP Address in your base URL 

static final String URL = "http://yourIPAddress:3000/";

example :

static final String URL = "http://192.168.0.100:3000/";

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3 Comments

i use that too but it same result
have you added INTERNET permission in your menifest file ?
<uses-permission android:name="android.permission.INTERNET" /> yes i already added it too but its not work..

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