'Type mismatch: inferred type is <no name provided> but Callback<Post!>! was expected

I have the function

        val client = NetworkService()
        val call = client.getService().getAllPost()
        call.enqueue(object : Callback<ArrayList<Post>>{
            override fun onFailure(call: Call<ArrayList<Post>>, t: Throwable) {
                Toast.makeText(this@MainActivity, "Get post failed", Toast.LENGTH_LONG).show()
            }

            override fun onResponse(
                call: Call<ArrayList<Post>>,
                response: Response<ArrayList<Post>>) {
                response.body()?.let{
                    post ->
                    adapter?.updateData(post)
                }?: kotlin.run {
                    Toast.makeText(this@MainActivity, "Get post failed", Toast.LENGTH_LONG).show()
                }

            }

        })

    }

*and have the error *

Type mismatch: inferred type is <no name provided> but Callback<Post!>! was expected

in call.enqueue(object : Callback<ArrayList<Post>> Callback ArrayList dont wanna work with object, idk why

Pls help this it

android retrofit2

Solution 1:^[1]

It's possible that you've imported a package with the same name as the one you actually meant to import.

Source: This just happened to me. Sometimes I don't read the package names closely enough when IntelliJ auto-imports new classes.

Solution 2:^[2]

You probably have somewhere in your code:

fun call(@Body body: Any): Call<Post>

The value to return is not Call<Post> as described in your error:

Type mismatch: inferred type is but Callback<Post!>! was expected

It is Call<List<Post>>:

fun call(@Body body: Any): Call<List<Post>>

(Note that I have put Any as the type of your argument because I don’t know its type.

Solution 3:^[3]

Check whether import package is from android or androidx

Solution 4:^[4]

make sure that the import is

import retrofit2.Callback

and notimport javax.security.auth.callback.Callback

Sources

This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.

Source: Stack Overflow

Solution	Source
Solution 1	IAmRasputin
Solution 2	Geoffrey R.
Solution 3	Rayan
Solution 4	Anthony Zeren

'Type mismatch: inferred type is <no name provided> but Callback<Post!>! was expected

Solution 1:[1]

Solution 2:[2]

Solution 3:[3]

Solution 4:[4]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]

Solution 3:^[3]

Solution 4:^[4]