Java – loadermanager does not accept ‘this’

OK, I surrendered. I don't understand

I'm paying attention to the udacity course of Android basics and need to figure out how to use loader to load data. However, when I use the following line, "this" is highlighted in red and displays the following error:

Wrong 3rd argument type. Found 'com.example.carl.latestnews.MainActivity', required: 'android.app.LoaderManager.LoaderCallbacks<java.lang.Object>

I used Google search, piled up and tried the suggestions I found. I've tried to create an internal class that implements callbacks. I hit a brick wall, and I sat here scratching my head to find out what I missed!

Who can tell me what I did wrong here?

Thank you in advance!

package com.example.carl.latestnews;


 import android.content.Context; 
 import android.os.Bundle; 
 import android.support.v4.app.LoaderManager; 
 import android.support.v4.content.AsyncTaskLoader; 
 import android.support.v4.content.Loader; 
 import android.support.v7.app.AppCompatActivity; 
 import android.view.View; 
 import android.widget.ListView; 
 import android.widget.TextView;
 import java.util.ArrayList;

 public class MainActivity extends AppCompatActivity implements LoaderManager.LoaderCallbacks<ArrayList<ArticleObject>> {

     // ArticleObject is a custom object which contains a headline, date, category etc of a news article

     // URL for Guardian API including API Key
     final static String GUARDIAN_API_URL = "https://content.guardianapis.com/search?";

     // API Key
     final static String GUARDIAN_API_KEY = "test";

     // ID for LoaderManager
     final static int LOADER_MANAGER_ID = 0;


     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);

         // Get or initialize loader manager
         getLoaderManager().initLoader(LOADER_MANAGER_ID, null, this);

     }

     @Override
     public Loader<ArrayList<ArticleObject>> onCreateLoader(int id, Bundle args) {
         return new DataLoader(); // DataLoader() removed for easy reading
     }

     @Override
     public void onl oadFinished(Loader<ArrayList<ArticleObject>> loader, ArrayList<ArticleObject> data) {
         / UI Update Code
     }

     @Override
     public void onl oaderReset(Loader<ArrayList<ArticleObject>> loader) {
         // Reset Code
     }




 }

resolvent:

The method expects loadercallbacks as a parameter

Your activity needs to implement the loadercallbacks interface. Or you can provide an anonymous implementation of the interface, such as:

    LoaderManager.LoaderCallbacks callbacks = new LoaderManager.LoaderCallbacks() {
        @Override
        public Loader onCreateLoader(int id, Bundle args) {
            return null;
        }

        @Override
        public void onl oadFinished(Loader loader, Object data) {

        }

        @Override
        public void onl oaderReset(Loader loader) {

        }

  getLoaderManager().initLoader(LOADER_MANAGER_ID, null, callback);

The implementation of interface methods is up to you, but this code will not take effect immediately