Android Open Source - yammp Genre Fragment

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License

The source code is released under:
GNU Lesser General Public License
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Java Source Code

/*
 *  YAMMP - Yet Another Multi Media Player for android
 *  Copyright (C) 2011-2012  Mariotaku Lee <mariotaku.lee@gmail.com>
 *//ww  w  .  ja  va 2 s  . c  o m
 *  This file is part of YAMMP.
 *
 *  YAMMP is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  YAMMP is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with YAMMP.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.yammp.app;

import org.yammp.Constants;
import org.yammp.R;
import org.yammp.util.MusicUtils;

import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Bundle;
import android.provider.MediaStore.Audio;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.ListFragment;
import android.support.v4.app.LoaderManager.LoaderCallbacks;
import android.support.v4.content.CursorLoader;
import android.support.v4.content.Loader;
import android.support.v4.widget.CursorAdapter;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ListView;
import android.widget.TextView;

public class GenreFragment extends ListFragment implements LoaderCallbacks<Cursor>, Constants {

  private GenresAdapter mAdapter;

  private int mNameIdx;

  public GenreFragment() {

  }

  public GenreFragment(Bundle args) {
    setArguments(args);
  }

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

    setHasOptionsMenu(true);

    mAdapter = new GenresAdapter(getActivity(), null, false);

    getLoaderManager().initLoader(0, null, this);
  }

  @Override
  public Loader<Cursor> onCreateLoader(int id, Bundle args) {

    String[] cols = new String[] { Audio.Genres._ID, Audio.Genres.NAME };

    String where = MusicUtils.getBetterGenresWhereClause(getActivity());

    Uri uri = Audio.Genres.EXTERNAL_CONTENT_URI;

    return new CursorLoader(getActivity(), uri, cols, where, null,
        Audio.Genres.DEFAULT_SORT_ORDER);
  }

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

  @Override
  public void onListItemClick(ListView listview, View view, int position, long id) {

    showDetails(position, id);
  }

  @Override
  public void onLoaderReset(Loader<Cursor> loader) {
    mAdapter.swapCursor(null);
  }

  @Override
  public void onLoadFinished(Loader<Cursor> loader, Cursor data) {

    if (data == null) {
      getActivity().finish();
      return;
    }

    mNameIdx = data.getColumnIndexOrThrow(Audio.Genres.NAME);

    mAdapter.changeCursor(data);

    setListAdapter(mAdapter);

  }

  @Override
  public void onSaveInstanceState(Bundle outState) {
    outState.putAll(getArguments() != null ? getArguments() : new Bundle());
    super.onSaveInstanceState(outState);
  }

  private void showDetails(int index, long id) {

    View detailsFrame = getActivity().findViewById(R.id.frame_details);
    boolean mDualPane = detailsFrame != null && detailsFrame.getVisibility() == View.VISIBLE;

    Bundle bundle = new Bundle();
    bundle.putString(INTENT_KEY_TYPE, Audio.Genres.CONTENT_TYPE);
    bundle.putLong(Audio.Genres._ID, id);

    if (mDualPane) {

      TrackFragment fragment = new TrackFragment();
      fragment.setArguments(bundle);

      FragmentTransaction ft = getFragmentManager().beginTransaction();
      ft.replace(R.id.frame_details, fragment);
      ft.setTransition(FragmentTransaction.TRANSIT_FRAGMENT_FADE);
      ft.commit();

    } else {

      Intent intent = new Intent(getActivity(), TrackBrowserActivity.class);
      intent.putExtras(bundle);
      startActivity(intent);
    }
  }

  private class GenresAdapter extends CursorAdapter {

    private GenresAdapter(Context context, Cursor cursor, boolean autoRequery) {
      super(context, cursor, autoRequery);
    }

    @Override
    public void bindView(View view, Context context, Cursor cursor) {

      ViewHolder viewholder = (ViewHolder) view.getTag();

      String genre_name = cursor.getString(mNameIdx);
      viewholder.genre_name.setText(MusicUtils.parseGenreName(genre_name));

    }

    @Override
    public View newView(Context context, Cursor cursor, ViewGroup parent) {

      View view = LayoutInflater.from(context).inflate(R.layout.playlist_list_item, null);
      ViewHolder viewholder = new ViewHolder(view);
      view.setTag(viewholder);
      return view;
    }

    private class ViewHolder {

      TextView genre_name;

      public ViewHolder(View view) {
        genre_name = (TextView) view.findViewById(R.id.playlist_name);
      }
    }

  }

}
Java Source Code List
