Android Open Source - dropdroid Epub List Fragment

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License

The source code is released under:

GNU General Public License

Java Source Code

package com.fjaviermo.dropdroid;
// w  w  w.j av  a  2  s. com
import java.io.IOException;
import java.io.InputStream;
import java.util.Comparator;
import java.util.List;

import nl.siegmann.epublib.domain.Book;
import nl.siegmann.epublib.epub.EpubReader;
import android.app.Activity;
import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.AsyncTask;
import android.os.Bundle;
import android.support.v4.app.DialogFragment;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.Loader;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemLongClickListener;

import com.dropbox.sync.android.DbxAccountManager;
import com.dropbox.sync.android.DbxFile;
import com.dropbox.sync.android.DbxFileInfo;
import com.dropbox.sync.android.DbxFileSystem;
import com.dropbox.sync.android.DbxPath;
import com.fjaviermo.Utils.DropDroidConfig;
import com.fjaviermo.Utils.Util;
import com.fjaviermo.Utils.Util.SORT;
import com.fjaviermo.adapter.EpubAdapter;
import com.fjaviermo.adapter.EpubAdapter.ObtainCoverImageListener;
import com.fjaviermo.comparator.EpubDateComparator;
import com.fjaviermo.comparator.EpubNameComparator;


public class EpubListFragment extends ListFragment implements LoaderCallbacks<List<DbxFileInfo>>, 
ObtainCoverImageListener {

  private View mEmptyText;
  private View mLinkButton;
  private View mLoadingSpinner;
  private DbxAccountManager mAccountManager;
  private SORT mSort= Util.SORT.NAME;

  public EpubListFragment() {}

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container,
      Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.epub_list, container, false);

    mEmptyText = view.findViewById(R.id.empty_text);
    mLinkButton = view.findViewById(R.id.link_button);
    mLoadingSpinner = view.findViewById(R.id.list_loading);

    mLinkButton.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
        mAccountManager.startLink(EpubListFragment.this, 0);
      }
    });

    return view;
  }

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

    getListView().setEmptyView(view.findViewById(android.R.id.empty));

    if (!mAccountManager.hasLinkedAccount()) {
      showUnlinkedView();
    } else {
      showLinkedView(false);
    }

    // No se ejecutar nunca al estar implementado el doble click
    getListView().setOnItemLongClickListener(new OnItemLongClickListener() {

      @Override
      public boolean onItemLongClick(AdapterView<?> parent, View view,
          int position, long id) {
        ObtainCoverImage(position);
        return true;
      }
    });
  }

  @Override
  public void onStart() {
    super.onStart();
    doLoad(false);
  }

  @Override
  public void onAttach(Activity activity) {
    super.onAttach(activity);
    mAccountManager = DropDroidConfig.getAccountManager(activity);
    setHasOptionsMenu(true);
  }

  @Override
  public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    inflater.inflate(R.menu.epub_list, menu);
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // handle item selection
    switch (item.getItemId()) {
    case R.id.order_by_name:
      mSort = Util.SORT.NAME;
      doLoad(true);
      return true;
    case R.id.order_by_date:
      mSort = Util.SORT.DATE;
      doLoad(true);
      return true;
    case R.id.unlink_dropbox:
      mAccountManager.unlink();
      setListAdapter(null);
      showUnlinkedView();
      return true;
    default:
      return super.onOptionsItemSelected(item);
    }
  }

  @Override
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
    if (requestCode == 0) {
      if (resultCode == Activity.RESULT_OK) {
        showLinkedView(true);
      }
    } else {
      super.onActivityResult(requestCode, resultCode, data);
    }
  }

  @Override
  public Loader<List<DbxFileInfo>> onCreateLoader(int id, Bundle args) {
    Comparator<DbxFileInfo> sortComparator = null;
    switch (mSort) {
    case NAME:
      sortComparator = new EpubNameComparator(true);
      break;
    case DATE:
      sortComparator = new EpubDateComparator(true);
      break;
    }
    return new EpubLoader(getActivity(), mAccountManager, DbxPath.ROOT, sortComparator);
  }

  @Override
  public void onLoadFinished(Loader<List<DbxFileInfo>> loader, List<DbxFileInfo> data) {
    mLoadingSpinner.setVisibility(View.GONE);
    mEmptyText.setVisibility(View.VISIBLE);

    setListAdapter(new EpubAdapter(getActivity(), data,this));
  }

  @Override
  public void onLoaderReset(Loader<List<DbxFileInfo>> loader) {}

  private void showUnlinkedView() {
    getListView().setVisibility(View.GONE);
    mEmptyText.setVisibility(View.GONE);
    mLoadingSpinner.setVisibility(View.GONE);
    mLinkButton.setVisibility(View.VISIBLE);
    getView().postInvalidate();
  }

  private void showLinkedView(boolean reset) {
    getListView().setVisibility(View.VISIBLE);
    mEmptyText.setVisibility(View.GONE);
    mLoadingSpinner.setVisibility(View.VISIBLE);
    mLinkButton.setVisibility(View.GONE);
    getView().postInvalidate();
    doLoad(reset);
  }

  private void doLoad(boolean reset) {
    if (mAccountManager.hasLinkedAccount()) {
      mEmptyText.setVisibility(View.GONE);
      mLoadingSpinner.setVisibility(View.VISIBLE);

      if (reset) {
        getLoaderManager().restartLoader(0, null, this);
      } else {
        getLoaderManager().initLoader(0, null, this);
      }
    }
  }

  /**
   * Muestra un dialog con la imagen de portada deseada
   * @param coverImage imagen a mostrar
   */
  private void showDialog(Bitmap coverImage) {
    DialogFragment coverImageDialog = CoverImageDialogFragment.newInstance(coverImage);
    coverImageDialog.show(getActivity().getSupportFragmentManager(), null);    
  }

  @Override
  public void ObtainCoverImage(int position) {
    DbxFileInfo file = (DbxFileInfo) getListAdapter().getItem(position);
    ObtainCoverImage obtainImage = new ObtainCoverImage();
    obtainImage.execute(file.path);
  }

  /**
   * Clase que se encarga de obtener la imagen de portada de un archivo
   * de dropbox en un hilo aparte apra no colapsar el hilo principal
   * @author fjaviermo
   *
   */
  private class ObtainCoverImage extends AsyncTask<DbxPath, Long, Bitmap> 
  {
    private ProgressDialog dialog = new ProgressDialog(getActivity());

    @Override
    protected void onPreExecute() {
      this.dialog.setMessage(getString(R.string.please_wait));
      this.dialog.show();
    }

    @Override
    protected Bitmap doInBackground(DbxPath... params) {
      Bitmap coverImage = null;
      try {

        DbxFileSystem fs = DropDroidConfig.getDbxFileSystem(mAccountManager);
        DbxFile file = fs.open(params[0]);

        InputStream epubInputStream = file.getReadStream();
        // Load Book from inputStream
        Book book = (new EpubReader()).readEpub(epubInputStream);

        coverImage  = BitmapFactory.decodeStream(book.getCoverImage().getInputStream());
        file.close();
      } catch (IOException e) {
        Log.e("epublib", e.getMessage());
      }
      return coverImage;
    }
    @Override
    protected void onPostExecute(Bitmap result) {
      if (dialog.isShowing()) {
        dialog.dismiss();
      }

      showDialog(result);
    }
  }
}

Java Source Code List

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