Main

package com.example.mvvmlivedatarxjava;

import androidx.appcompat.app.AppCompatActivity;
import androidx.lifecycle.ViewModelProviders;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;

import android.os.Bundle;
import android.view.View;
import android.widget.ProgressBar;
import android.widget.RelativeLayout;
import android.widget.TextView;
import android.widget.Toast;

import com.example.mvvmlivedatarxjava.adapter.NewsAdapter;
import com.example.mvvmlivedatarxjava.model.Article;
import com.example.mvvmlivedatarxjava.model.Status;
import com.example.mvvmlivedatarxjava.viewmodel.MainViewModel;
import com.google.android.material.snackbar.Snackbar;

import java.util.ArrayList;
import java.util.List;

public class MainActivity extends AppCompatActivity {

    List<Article> articles = new ArrayList<>();
    NewsAdapter newsAdapter;
    private RelativeLayout relativeLayout;
    private ProgressBar progressBar;
    MainViewModel mainViewModel;
    RecyclerView recyclerNews;
    LinearLayoutManager linearLayoutManager;

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

        recyclerNews = findViewById(R.id.recyclerViewData);
        progressBar = findViewById(R.id.progressBarData);
        relativeLayout = findViewById(R.id.relativeLayoutData);
        mainViewModel = ViewModelProviders.of(this).get(MainViewModel.class);
        mainViewModel.init();
        setRecyclerView();
        mainViewModel.getIsLoading().observe(this, loading ->{
            if (loading)
               progressBar.setVisibility(View.VISIBLE);
            else
                progressBar.setVisibility(View.GONE);
        });
        mainViewModel.getError().observe(this, error->{
            callSnackBar("Terjadi Kesalahan, Silahkan coba lagi");
        });
        mainViewModel.getMainRespository().observe(this, responseNews ->{

            articles.addAll(responseNews.getArticles());
            newsAdapter.notifyDataSetChanged();
        });

    }

    private void callSnackBar(String message) {
//        Snackbar.make(linearLayout, message, Snackbar.LENGTH_LONG).setAction("REFRESH", new View.OnClickListener() {
//            @Override
//            public void onClick(View v) {
//                callData(pageawal);
//            }
//        }).show();

        Snackbar snackbar = Snackbar
                .make(relativeLayout, message, Snackbar.LENGTH_LONG)
                .setAction("RETRY", new View.OnClickListener() {
                    @Override
                    public void onClick(View view) {
                        mainViewModel.getMainRespository().observe(MainActivity.this, responseNews -> {
                            articles.addAll(responseNews.getArticles());
                            newsAdapter.notifyDataSetChanged();
                        });
                    }
                });
        snackbar.setActionTextColor(getResources().getColor(R.color.colorPrimary));
        View sbView = snackbar.getView();
        TextView textView = sbView.findViewById(com.google.android.material.R.id.snackbar_text);
        textView.setTextColor(getResources().getColor(R.color.colorPrimaryDark));
        snackbar.show();
    }

    private void setRecyclerView() {
        linearLayoutManager = new LinearLayoutManager(this);
        newsAdapter = new NewsAdapter(articles, this);
        newsAdapter.setOnItemClick(article -> Toast.makeText(getApplicationContext(), article.getTitle(), Toast.LENGTH_SHORT).show());
        recyclerNews.setHasFixedSize(true);
        recyclerNews.setLayoutManager(linearLayoutManager);
        recyclerNews.setAdapter(newsAdapter);
    }
}