MovieFragment.java

package com.indramahkota.moviecatalogue.fragments;

import android.os.Bundle;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.SearchView;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.fragment.app.Fragment;
import androidx.lifecycle.Observer;
import androidx.lifecycle.ViewModelProviders;
import androidx.recyclerview.widget.LinearLayoutManager;
import androidx.recyclerview.widget.RecyclerView;
import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;

import com.facebook.shimmer.ShimmerFrameLayout;
import com.indramahkota.moviecatalogue.BuildConfig;
import com.indramahkota.moviecatalogue.R;
import com.indramahkota.moviecatalogue.adapters.MovieAdapter;
import com.indramahkota.moviecatalogue.models.DiscoverMovie;
import com.indramahkota.moviecatalogue.models.others.Progress;
import com.indramahkota.moviecatalogue.viewmodels.ListMovieViewModel;

import java.util.List;

public class MovieFragment extends Fragment {
    private static final String STATE_SCROLL = "state_scroll";

    private RecyclerView rvMovies;
    private LinearLayoutManager linearLayoutManager;
    private ShimmerFrameLayout mShimmerViewContainer;

    private Integer scrollPosition = 0;
    private ListMovieViewModel viewModel;
    private List<DiscoverMovie> discoverMovies;
    private SwipeRefreshLayout swipeRefreshLayout;

    public MovieFragment() { }

    @Override
    public void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (savedInstanceState != null) {
            scrollPosition = savedInstanceState.getInt(STATE_SCROLL);
        }
    }

    @Override
    public void onSaveInstanceState(@NonNull Bundle outState) {
        super.onSaveInstanceState(outState);
        scrollPosition = linearLayoutManager.findFirstVisibleItemPosition();
        outState.putInt(STATE_SCROLL, scrollPosition);
    }

    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        return inflater.inflate(R.layout.fragment_movie_tv_container, container, false);
    }

    @Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        Log.d("MovieFragment", "created");

        swipeRefreshLayout = view.findViewById(R.id.swipe_to_refresh);
        swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
            @Override
            public void onRefresh() {
                Log.d("MovieFragment", "Swipe on refresh");
                viewModel.setListMovie(BuildConfig.TMDB_API_KEY);
            }
        });

        mShimmerViewContainer = view.findViewById(R.id.shimmer_view_fragment_container);
        mShimmerViewContainer.setVisibility(View.VISIBLE);

        linearLayoutManager = new LinearLayoutManager(view.getContext());
        rvMovies = view.findViewById(R.id.rv_fragment_category);
        rvMovies.setLayoutManager(linearLayoutManager);
        rvMovies.setHasFixedSize(true);

        if(discoverMovies != null) {
            Log.d("MovieFragment", "discoverMovies != null");
            MovieAdapter listMovieAdapter = new MovieAdapter(discoverMovies, getContext());
            listMovieAdapter.notifyDataSetChanged();
            rvMovies.setAdapter(listMovieAdapter);
            linearLayoutManager.scrollToPosition(scrollPosition);

            viewModel.setProgress(new Progress(false, -1, 1));
            mShimmerViewContainer.setVisibility(View.GONE);
        }

        Log.d("MovieFragment", "exec line");

        viewModel = ViewModelProviders.of(this).get(ListMovieViewModel.class);
        viewModel.getListMovie().observe(this, new Observer<List<DiscoverMovie>>() {
            @Override
            public void onChanged(List<DiscoverMovie> discMovies) {
                Log.d("MovieFragment", "data changed");
                discoverMovies = discMovies;
                MovieAdapter listMovieAdapter = new MovieAdapter(discoverMovies, getContext());
                listMovieAdapter.notifyDataSetChanged();
                rvMovies.setAdapter(listMovieAdapter);
                linearLayoutManager.scrollToPosition(scrollPosition);
                swipeRefreshLayout.setRefreshing(false);
            }
        });
        viewModel.getProgress().observe(this, new Observer<Progress>() {
            @Override
            public void onChanged(Progress progress) {
                swipeRefreshLayout.setRefreshing(false);

                if(progress != null) {
                    if(!progress.getLoading()) {
                        mShimmerViewContainer.setVisibility(View.GONE);
                        rvMovies.setVisibility(View.VISIBLE);
                    } else {
                        mShimmerViewContainer.setVisibility(View.VISIBLE);
                        rvMovies.setVisibility(View.GONE);
                    }

                    if(progress.getErrorCode() == 1 || progress.getErrorCode() == 2) {
                        Toast.makeText(getContext(), getResources().getString(R.string.load_failed), Toast.LENGTH_SHORT).show();
                    }
                }
            }
        });
        viewModel.setListMovie(BuildConfig.TMDB_API_KEY);

        SearchView searchView = view.findViewById(R.id.searchView);
        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
            @Override
            public boolean onQueryTextSubmit(String query) {
                viewModel.searchMovie(BuildConfig.TMDB_API_KEY, query);
                return true;
            }
            @Override
            public boolean onQueryTextChange(String newText) {
                return false;
            }
        });
        searchView.setOnCloseListener(new SearchView.OnCloseListener() {
            @Override
            public boolean onClose() {
                viewModel.setListMovie(BuildConfig.TMDB_API_KEY);
                return false;
            }
        });
    }

    @Override
    public void onResume() {
        super.onResume();
        Log.d("MovieFragment", "resume");
        mShimmerViewContainer.startShimmer();
    }

    @Override
    public void onPause() {
        super.onPause();
        Log.d("MovieFragment", "stop");
        mShimmerViewContainer.stopShimmer();
    }
}