How to query an api with user input using retrofit and MVVM?

Question

I am trying to query the https://jsonplaceholder.typicode.com/posts api using user input. Right now I use hardcoded text to query it, because I can't figure out how to dynamically query it. I have an activity with an EditText for input and a second activity where the api response is displayed. How do I give the user input to the next activity?

My Interface

public interface PostsApi {
    @GET("posts")       
    Call<List<Posts>> getPosts(@Query("id") int id, @Query("title") String title);

A part of my Retrofit Service Class

public Call<List<Posts>> getPosts(){
        return postsApi.getPosts(2, "qui est esse");  //this should use the user input
    }

Does [this](https://stackoverflow.com/questions/3913592/start-an-activity-with-a-parameter) answers your question? Pass the string to the activity, then send it to your API from there. I also recommend you eventually use fragment screens with a single activity instead of multiple activities. — Nicolas, Mar 23 '20 at 16:09

score 0 · Answer 1 · answered Mar 23 '20 at 17:31

If I understand well your question. You would like to get a specfic post with an Id using the Query Parameter in retrofit. For example, if you would like to make a retrofit call like this:

https://jsonplaceholder.typicode.com/posts/1

So, you have to edit your endpoint from

@GET("posts")       
Call<List<Posts>> getPosts(@Query("id") int id, @Query("title") String title);

to become

@GET("posts/{id}")       
Call<List<Posts>> getPosts(@Query("id") int id, @Query("title") String title);

By this type of query type, you can pass your id to your function. Note: I don't have the api design, I just guess the query parameter of id. But anyway, It gonna be the same for the title.

If you found any problem, kindly reply.

Happy coding

How to query an api with user input using retrofit and MVVM?

1 Answers1