retrofit dependencies in android studio kotlin
// Retrofit
implementation 'com.squareup.retrofit2:retrofit:2.6.0'
implementation 'com.squareup.retrofit2:converter-gson:2.6.0'
implementation "com.squareup.okhttp3:logging-interceptor:4.5.0"
kotlin and retrofit
- intoduction
1. post is used to send data to server
- exapmle
"simple post"
@POST("posts")
Call<Post> createPost(@Body Post post);
"post with from url encoded "
@FormUrlEncoded
@POST("posts")
Call<Post> createPost( @Field("userId") int userid ,
@Field("title") String title,
@Field("body") String body );
"using map"
@FormUrlEncoded
@POST("posts")
Call<Post> createPost(@FieldMap Map<String,String> postMap);
- INTERFACE
public interface MyWebService {
String BASE_URL = "https://jsonplaceholder.typicode.com/";
String FEED = "posts";
Retrofit retrofit = new Retrofit.Builder()
.baseUrl(BASE_URL)
.addConverterFactory(GsonConverterFactory.create())
.build();
@GET(FEED)
Call<List<Post>> getPosts();
}
- MODEL CLASS
public class Post {
private int userId;
private int id;
private String title;
private String body;
public int getUserId() {
return userId;
}
public void setUserId(int userId) {
this.userId = userId;
}
public int getId() {
return id;
}
public void setId(int id) {
this.id = 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;
}
}
- IN ACTIVITY WHERE TO SEND POST REQUEST
Post post = new Post(1,"Post Title","this is post body");
Map<String,String> postmap = new HashMap<>();
postmap.put("userId","33");
postmap.put("title","My post title");
postmap.put("body","this is my post body in the map");
Call<Post> postCall = myWebService.createPost(postmap);
postCall.enqueue(new Callback<Post>() {
@Override
public void onResponse(Call<Post> call, Response<Post> response) {
if (response.isSuccessful()){
textView.setText(String.valueOf(response.code()));
show(response.body());
}
}
@Override
public void onFailure(Call<Post> call, Throwable t) {
}
});