Android Open Source - hpush Dailies Lst Fragment

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License

The source code is released under:
MIT License
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Java Source Code

package com.hpush.app.fragments;
//  ww w .  j av a 2  s.  c  o m
import java.util.List;

import android.content.Context;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.os.AsyncTaskCompat;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.StaggeredGridLayoutManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;

import com.chopping.application.BasicPrefs;
import com.chopping.fragments.BaseFragment;
import com.github.ksoichiro.android.observablescrollview.ObservableRecyclerView;
import com.github.ksoichiro.android.observablescrollview.ObservableScrollViewCallbacks;
import com.github.ksoichiro.android.observablescrollview.ScrollState;
import com.hpush.R;
import com.hpush.app.adapters.DailiesListAdapter;
import com.hpush.bus.BookmarkMessageEvent;
import com.hpush.bus.BookmarkedEvent;
import com.hpush.bus.ShowActionBar;
import com.hpush.data.DailyListItem;
import com.hpush.db.DB;
import com.hpush.db.DB.Sort;
import com.hpush.utils.Prefs;

import de.greenrobot.event.EventBus;

/**
 * Show all {@link com.hpush.data.Daily}s.
 *
 * @author Xinyue Zhao
 */
public final class DailiesLstFragment extends BaseFragment implements ObservableScrollViewCallbacks {

  /**
   * Main layout for this component.
   */
  private static final int LAYOUT = R.layout.fragment_dailies_list;


  /**
   * Database.
   */
  private DB mDB;
  /**
   * View shows all data.
   */
  private ObservableRecyclerView mRv;
  /**
   * {@link android.support.v7.widget.RecyclerView.Adapter} for the {@link #mRv}.
   */
  private DailiesListAdapter mAdp;

  //------------------------------------------------
  //Subscribes, event-handlers
  //------------------------------------------------

  /**
   * Handler for {@link com.hpush.bus.BookmarkMessageEvent}.
   *
   * @param e
   *     Event {@link com.hpush.bus.BookmarkMessageEvent}.
   */
  public void onEvent(BookmarkMessageEvent e) {
    if(e.getMessageListItem() instanceof DailyListItem) {
      //Bookmark on the site self.
      bookmarkOneItem((DailyListItem) e.getMessageListItem());
    } else {
      //Bookmark from a webview shows details.
      List<DailyListItem> list = mAdp.getMessages();
      for(DailyListItem item : list) {
        if(item.getId() == e.getMessageListItem().getId()) {
          bookmarkOneItem(item);
          EventBus.getDefault().removeAllStickyEvents();
          break;
        }
      }
    }
  }

  //------------------------------------------------
  public static DailiesLstFragment newInstance(Context context) {
    return (DailiesLstFragment) DailiesLstFragment.instantiate(context, DailiesLstFragment.class.getName());
  }

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


  @Override
  public void onViewCreated(View view, Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    setErrorHandlerAvailable(false);

    mDB = DB.getInstance(getActivity().getApplication());
    mRv = (ObservableRecyclerView) view.findViewById(R.id.daily_rv);
    if(getResources().getBoolean(R.bool.landscape)) {
      mRv.setLayoutManager(new StaggeredGridLayoutManager(4, StaggeredGridLayoutManager.VERTICAL));
    } else {
      mRv.setLayoutManager(new LinearLayoutManager(getActivity()));
    }
    mRv.setHasFixedSize(false);
    mRv.setScrollViewCallbacks(this);


    loadDailies();
  }

  @Override
  protected BasicPrefs getPrefs() {
    return Prefs.getInstance(getActivity().getApplication());
  }



  /**
   * Get all data.
   */
  private void loadDailies() {
    AsyncTask<Void, List<DailyListItem>, List<DailyListItem>> task = new AsyncTask<Void, List<DailyListItem>, List<DailyListItem>>() {
      @Override
      protected List<DailyListItem> doInBackground(Void... params) {
        return mDB.getDailies(Sort.DESC);
      }

      @Override
      protected void onPostExecute(List<DailyListItem> dailies) {
        super.onPostExecute(dailies);
        if (mAdp == null) {
          mAdp = new DailiesListAdapter(dailies );
          mRv.setAdapter(mAdp);
        } else {
          mAdp.setMessages(dailies);
          mAdp.notifyDataSetChanged();
        }
      }
    };
    AsyncTaskCompat.executeParallel(task);
  }

  /**
   * Bookmark one item.
   *
   * @param itemToBookmark
   *     The item to bookmark.
   */
  private void bookmarkOneItem(final DailyListItem itemToBookmark) {
    AsyncTaskCompat.executeParallel(new AsyncTask<List<DailyListItem>, Void, Void>() {
      @Override
      protected Void doInBackground(
          List<DailyListItem>... params) {
        List<DailyListItem> data = params[0];
        for (DailyListItem obj:data) {
          if (obj.getId() == itemToBookmark.getId()) {
            mDB.removeMessage(obj == null ? null : obj.getMessage());
            mDB.addBookmark(obj.getMessage());
          }
        }
        itemToBookmark.setBookmarked(true);
        return null;
      }

      @Override
      protected void onPostExecute(Void aVoid) {
        super.onPostExecute(aVoid);
        mAdp.notifyDataSetChanged();
        EventBus.getDefault().post(new BookmarkedEvent());
      }
    }, mAdp.getMessages());
  }

  @Override
  public void onScrollChanged(int i, boolean b, boolean b2) {

  }

  @Override
  public void onDownMotionEvent() {

  }

  @Override
  public void onUpOrCancelMotionEvent(ScrollState scrollState) {
    if (scrollState == ScrollState.UP) {
      EventBus.getDefault().post(new ShowActionBar(false));
    } else if (scrollState == ScrollState.DOWN) {
      EventBus.getDefault().post(new ShowActionBar(true));
    }
  }
}
Java Source Code List
