content: package de.danoeh.antennapod.ui.statistics.years;
  
  import android.os.Bundle;
  import android.util.Log;
  import android.view.LayoutInflater;
  import android.view.Menu;
  import android.view.View;
  import android.view.ViewGroup;
  import android.widget.ProgressBar;
  import androidx.annotation.NonNull;
  import androidx.annotation.Nullable;
  import androidx.fragment.app.Fragment;
  import androidx.recyclerview.widget.LinearLayoutManager;
  import androidx.recyclerview.widget.RecyclerView;
  import de.danoeh.antennapod.event.StatisticsEvent;
  import de.danoeh.antennapod.storage.database.DBReader;
  import de.danoeh.antennapod.ui.statistics.R;
  import io.reactivex.rxjava3.core.Observable;
  import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers;
  import io.reactivex.rxjava3.disposables.Disposable;
  import io.reactivex.rxjava3.schedulers.Schedulers;
  import org.greenrobot.eventbus.EventBus;
  import org.greenrobot.eventbus.Subscribe;
  import org.greenrobot.eventbus.ThreadMode;
  
  /**
   * Displays the yearly statistics screen
   */
  public class YearsStatisticsFragment extends Fragment {
      private static final String TAG = YearsStatisticsFragment.class.getSimpleName();
  
      private Disposable disposable;
      private RecyclerView yearStatisticsList;
      private ProgressBar progressBar;
      private YearStatisticsListAdapter listAdapter;
  
      @Nullable
      @Override
      public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container,
                               @Nullable Bundle savedInstanceState) {
          View root = inflater.inflate(R.layout.statistics_fragment, container, false);
          yearStatisticsList = root.findViewById(R.id.statistics_list);
          progressBar = root.findViewById(R.id.progressBar);
          listAdapter = new YearStatisticsListAdapter(getContext());
          yearStatisticsList.setLayoutManager(new LinearLayoutManager(getContext()));
          yearStatisticsList.setAdapter(listAdapter);
          EventBus.getDefault().register(this);
          return root;
      }
  
      @Override
      public void onStart() {
          super.onStart();
          refreshStatistics();
      }
  
      @Override
      public void onDestroyView() {
          super.onDestroyView();
          EventBus.getDefault().unregister(this);
          if (disposable != null) {
              disposable.dispose();
          }
      }
  
      @Subscribe(threadMode = ThreadMode.MAIN)
      public void statisticsEvent(StatisticsEvent event) {
          refreshStatistics();
      }
  
      @Override
      public void onPrepareOptionsMenu(@NonNull Menu menu) {
          super.onPrepareOptionsMenu(menu);
          menu.findItem(R.id.statistics_reset).setVisible(true);
          menu.findItem(R.id.statistics_filter).setVisible(false);
      }
  
      private void refreshStatistics() {
          progressBar.setVisibility(View.VISIBLE);
          yearStatisticsList.setVisibility(View.GONE);
          loadStatistics();
      }
  
      private void loadStatistics() {
          if (disposable != null) {
              disposable.dispose();
          }
          disposable = Observable.fromCallable(DBReader::getMonthlyTimeStatistics)
                  .subscribeOn(Schedulers.io())
                  .observeOn(AndroidSchedulers.mainThread())
                  .subscribe(result -> {
                      listAdapter.update(result);
                      progressBar.setVisibility(View.GONE);
                      yearStatisticsList.setVisibility(View.VISIBLE);
                  }, error -> Log.e(TAG, Log.getStackTraceString(error)));
      }
  }
  