com.android.music.ArtistAlbumBrowserFragment.java Source code

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Here is the source code for com.android.music.ArtistAlbumBrowserFragment.java

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/*
 * Copyright (C) 2007 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.music;

import android.app.SearchManager;
import android.content.AsyncQueryHandler;
import android.content.BroadcastReceiver;
import android.content.ComponentName;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.ServiceConnection;
import android.content.res.Resources;
import android.database.Cursor;
import android.database.CursorWrapper;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.media.AudioManager;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.IBinder;
import android.os.Message;
import android.provider.MediaStore;
import android.support.v4.app.Fragment;
import android.text.TextUtils;
import android.view.ContextMenu;
import android.view.ContextMenu.ContextMenuInfo;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnCreateContextMenuListener;
import android.view.ViewGroup;
import android.widget.ExpandableListView;
import android.widget.ExpandableListView.OnChildClickListener;
import android.widget.ImageView;
import android.widget.SectionIndexer;
import android.widget.SimpleCursorTreeAdapter;
import android.widget.TextView;

import com.android.music.MusicUtils.ServiceToken;

public class ArtistAlbumBrowserFragment extends Fragment
        implements OnCreateContextMenuListener, MusicUtils.Defs, ServiceConnection, OnChildClickListener {
    private String mCurrentArtistId;
    private String mCurrentArtistName;
    private String mCurrentAlbumId;
    private String mCurrentAlbumName;
    private String mCurrentArtistNameForAlbum;
    boolean mIsUnknownArtist;
    boolean mIsUnknownAlbum;
    private ArtistAlbumListAdapter mAdapter;
    private boolean mAdapterSent;
    private final static int SEARCH = CHILD_MENU_BASE;
    private static int mLastListPosCourse = -1;
    private static int mLastListPosFine = -1;
    private ServiceToken mToken;
    private Cursor mArtistCursor;
    private ExpandableListView lv;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        View view = inflater.inflate(R.layout.media_picker_activity_expanding, null);
        getActivity().setVolumeControlStream(AudioManager.STREAM_MUSIC);
        mToken = MusicUtils.bindToService(getActivity(), this);

        if (savedInstanceState != null) {
            mCurrentAlbumId = savedInstanceState.getString("selectedalbum");
            mCurrentAlbumName = savedInstanceState.getString("selectedalbumname");
            mCurrentArtistId = savedInstanceState.getString("selectedartist");
            mCurrentArtistName = savedInstanceState.getString("selectedartistname");
        }

        IntentFilter f = new IntentFilter();
        f.addAction(Intent.ACTION_MEDIA_SCANNER_STARTED);
        f.addAction(Intent.ACTION_MEDIA_SCANNER_FINISHED);
        f.addAction(Intent.ACTION_MEDIA_UNMOUNTED);
        f.addDataScheme("file");
        getActivity().registerReceiver(mScanListener, f);

        lv = (ExpandableListView) view.findViewById(android.R.id.list);

        mAdapter = (ArtistAlbumListAdapter) getActivity().getLastNonConfigurationInstance();
        if (mAdapter == null) {
            //Log.i("@@@", "starting query");
            mAdapter = new ArtistAlbumListAdapter(getActivity().getApplication(), this, null, // cursor
                    R.layout.track_list_item_group, new String[] {}, new int[] {}, R.layout.track_list_item_child,
                    new String[] {}, new int[] {});
            lv.setAdapter(mAdapter);
            getArtistCursor(mAdapter.getQueryHandler(), null);
        } else {
            mAdapter.setActivity(this);
            lv.setAdapter(mAdapter);
            mArtistCursor = mAdapter.getCursor();
            if (mArtistCursor != null) {
                init(mArtistCursor);
            } else {
                getArtistCursor(mAdapter.getQueryHandler(), null);
            }
        }

        lv.setOnCreateContextMenuListener(this);
        lv.setOnChildClickListener(this);
        lv.setTextFilterEnabled(true);

        return view;
    }

    /*
     @Override
        public Object onRetainNonConfigurationInstance() {
       mAdapterSent = true;
       return mAdapter;
        }*/

    @Override
    public void onSaveInstanceState(Bundle outState) {
        // TODO Auto-generated method stub
        outState.putString("selectedalbum", mCurrentAlbumId);
        outState.putString("selectedalbumname", mCurrentAlbumName);
        outState.putString("selectedartist", mCurrentArtistId);
        outState.putString("selectedartistname", mCurrentArtistName);
        super.onSaveInstanceState(outState);
    }

    @Override
    public void onDestroy() {
        // TODO Auto-generated method stub
        //ExpandableListView lv = getExpandableListView();
        if (lv != null) {
            mLastListPosCourse = lv.getFirstVisiblePosition();
            View cv = lv.getChildAt(0);
            if (cv != null) {
                mLastListPosFine = cv.getTop();
            }
        }
        MusicUtils.unbindFromService(mToken);
        // If we have an adapter and didn't send it off to another activity yet, we should
        // close its cursor, which we do by assigning a null cursor to it. Doing this
        // instead of closing the cursor directly keeps the framework from accessing
        // the closed cursor later.
        if (!mAdapterSent && mAdapter != null) {
            mAdapter.changeCursor(null);
        }
        // Because we pass the adapter to the next activity, we need to make
        // sure it doesn't keep a reference to this activity. We can do this
        // by clearing its DatasetObservers, which setListAdapter(null) does.
        //lv.setAdapter(null);
        mAdapter = null;
        getActivity().unregisterReceiver(mScanListener);
        lv.setAdapter(mAdapter);
        super.onDestroy();
    }

    @Override
    public void onPause() {
        // TODO Auto-generated method stub
        getActivity().unregisterReceiver(mTrackListListener);
        mReScanHandler.removeCallbacksAndMessages(null);
        super.onPause();
    }

    @Override
    public void onResume() {
        // TODO Auto-generated method stub
        super.onResume();

        IntentFilter f = new IntentFilter();
        f.addAction(MediaPlaybackService.META_CHANGED);
        f.addAction(MediaPlaybackService.QUEUE_CHANGED);
        getActivity().registerReceiver(mTrackListListener, f);
        mTrackListListener.onReceive(null, null);
        //need fix
        MusicUtils.setSpinnerState(getActivity());
    }

    private BroadcastReceiver mTrackListListener = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            lv.invalidateViews();
            MusicUtils.updateNowPlaying(getActivity());
        }
    };
    private BroadcastReceiver mScanListener = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            MusicUtils.setSpinnerState(getActivity());
            mReScanHandler.sendEmptyMessage(0);
            if (intent.getAction().equals(Intent.ACTION_MEDIA_UNMOUNTED)) {
                MusicUtils.clearAlbumArtCache();
            }
        }
    };

    private Handler mReScanHandler = new Handler() {
        @Override
        public void handleMessage(Message msg) {
            if (mAdapter != null) {
                getArtistCursor(mAdapter.getQueryHandler(), null);
            }
        }
    };

    public void init(Cursor c) {

        if (mAdapter == null) {
            return;
        }
        mAdapter.changeCursor(c); // also sets mArtistCursor

        if (mArtistCursor == null) {
            MusicUtils.displayDatabaseError(getActivity());
            getActivity().closeContextMenu();
            mReScanHandler.sendEmptyMessageDelayed(0, 1000);
            return;
        }

        // restore previous position
        if (mLastListPosCourse >= 0) {
            //NF ExpandableListView elv = getExpandableListView();
            lv.setSelectionFromTop(mLastListPosCourse, mLastListPosFine);
            mLastListPosCourse = -1;
        }

        MusicUtils.hideDatabaseError(getActivity());
        //MusicUtils.updateButtonBar(this, R.id.artisttab);

    }

    @Override
    public boolean onChildClick(ExpandableListView parent, View v, int groupPosition, int childPosition, long id) {

        mCurrentAlbumId = Long.valueOf(id).toString();

        Intent intent = new Intent(Intent.ACTION_PICK);
        intent.setDataAndType(Uri.EMPTY, "vnd.android.cursor.dir/track");
        intent.setClass(getActivity(), TrackBrowserActivity.class);
        intent.putExtra("album", mCurrentAlbumId);
        Cursor c = (Cursor) mAdapter.getChild(groupPosition, childPosition);
        String album = c.getString(c.getColumnIndex(MediaStore.Audio.Albums.ALBUM));
        if (album == null || album.equals(MediaStore.UNKNOWN_STRING)) {
            // unknown album, so we should include the artist ID to limit the songs to songs only by that artist 
            mArtistCursor.moveToPosition(groupPosition);
            mCurrentArtistId = mArtistCursor.getString(mArtistCursor.getColumnIndex(MediaStore.Audio.Artists._ID));
            intent.putExtra("artist", mCurrentArtistId);
        }
        startActivity(intent);
        return true;
    }

    @Override
    public boolean onContextItemSelected(MenuItem item) {
        // TODO Auto-generated method stub
        return super.onContextItemSelected(item);
    }

    @Override
    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
        // TODO Auto-generated method stub
        super.onCreateContextMenu(menu, v, menuInfo);
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        // TODO Auto-generated method stub
        super.onCreateOptionsMenu(menu, inflater);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // TODO Auto-generated method stub
        return super.onOptionsItemSelected(item);
    }

    @Override
    public void onPrepareOptionsMenu(Menu menu) {
        // TODO Auto-generated method stub
        super.onPrepareOptionsMenu(menu);
    }

    void doSearch() {
        CharSequence title = null;
        String query = null;

        Intent i = new Intent();
        i.setAction(MediaStore.INTENT_ACTION_MEDIA_SEARCH);
        i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

        if (mCurrentArtistId != null) {
            title = mCurrentArtistName;
            query = mCurrentArtistName;
            i.putExtra(MediaStore.EXTRA_MEDIA_ARTIST, mCurrentArtistName);
            i.putExtra(MediaStore.EXTRA_MEDIA_FOCUS, MediaStore.Audio.Artists.ENTRY_CONTENT_TYPE);
        } else {
            if (mIsUnknownAlbum) {
                title = query = mCurrentArtistNameForAlbum;
            } else {
                title = query = mCurrentAlbumName;
                if (!mIsUnknownArtist) {
                    query = query + " " + mCurrentArtistNameForAlbum;
                }
            }
            i.putExtra(MediaStore.EXTRA_MEDIA_ARTIST, mCurrentArtistNameForAlbum);
            i.putExtra(MediaStore.EXTRA_MEDIA_ALBUM, mCurrentAlbumName);
            i.putExtra(MediaStore.EXTRA_MEDIA_FOCUS, MediaStore.Audio.Albums.ENTRY_CONTENT_TYPE);
        }
        title = getString(R.string.mediasearch, title);
        i.putExtra(SearchManager.QUERY, query);

        startActivity(Intent.createChooser(i, title));
    }

    @Override
    public void onActivityResult(int requestCode, int resultCode, Intent intent) {
        switch (requestCode) {
        case SCAN_DONE:
            if (resultCode == getActivity().RESULT_CANCELED) {
                getActivity().finish();
            } else {
                getArtistCursor(mAdapter.getQueryHandler(), null);
            }
            break;

        case NEW_PLAYLIST:
            if (resultCode == getActivity().RESULT_OK) {
                Uri uri = intent.getData();
                if (uri != null) {
                    long[] list = null;
                    if (mCurrentArtistId != null) {
                        list = MusicUtils.getSongListForArtist(getActivity(), Long.parseLong(mCurrentArtistId));
                    } else if (mCurrentAlbumId != null) {
                        list = MusicUtils.getSongListForAlbum(getActivity(), Long.parseLong(mCurrentAlbumId));
                    }
                    MusicUtils.addToPlaylist(getActivity(), list, Long.parseLong(uri.getLastPathSegment()));
                }
            }
            break;
        }
    }

    private Cursor getArtistCursor(AsyncQueryHandler async, String filter) {

        String[] cols = new String[] { MediaStore.Audio.Artists._ID, MediaStore.Audio.Artists.ARTIST,
                MediaStore.Audio.Artists.NUMBER_OF_ALBUMS, MediaStore.Audio.Artists.NUMBER_OF_TRACKS };

        Uri uri = MediaStore.Audio.Artists.EXTERNAL_CONTENT_URI;
        if (!TextUtils.isEmpty(filter)) {
            uri = uri.buildUpon().appendQueryParameter("filter", Uri.encode(filter)).build();
        }

        Cursor ret = null;
        if (async != null) {
            async.startQuery(0, null, uri, cols, null, null, MediaStore.Audio.Artists.ARTIST_KEY);
        } else {
            ret = MusicUtils.query(getActivity(), uri, cols, null, null, MediaStore.Audio.Artists.ARTIST_KEY);
        }
        return ret;
    }

    static class ArtistAlbumListAdapter extends SimpleCursorTreeAdapter implements SectionIndexer {

        private final Drawable mNowPlayingOverlay;
        private final BitmapDrawable mDefaultAlbumIcon;
        private int mGroupArtistIdIdx;
        private int mGroupArtistIdx;
        private int mGroupAlbumIdx;
        private int mGroupSongIdx;
        private final Context mContext;
        private final Resources mResources;
        private final String mAlbumSongSeparator;
        private final String mUnknownAlbum;
        private final String mUnknownArtist;
        private final StringBuilder mBuffer = new StringBuilder();
        private final Object[] mFormatArgs = new Object[1];
        private final Object[] mFormatArgs3 = new Object[3];
        private MusicAlphabetIndexer mIndexer;
        private ArtistAlbumBrowserFragment mActivity;
        private AsyncQueryHandler mQueryHandler;
        private String mConstraint = null;
        private boolean mConstraintIsValid = false;

        static class ViewHolder {
            TextView line1;
            TextView line2;
            ImageView play_indicator;
            ImageView icon;
        }

        class QueryHandler extends AsyncQueryHandler {
            QueryHandler(ContentResolver res) {
                super(res);
            }

            @Override
            protected void onQueryComplete(int token, Object cookie, Cursor cursor) {
                //Log.i("@@@", "query complete");
                mActivity.init(cursor);
            }
        }

        ArtistAlbumListAdapter(Context context, ArtistAlbumBrowserFragment currentactivity, Cursor cursor,
                int glayout, String[] gfrom, int[] gto, int clayout, String[] cfrom, int[] cto) {
            super(context, cursor, glayout, gfrom, gto, clayout, cfrom, cto);
            mActivity = currentactivity;
            mQueryHandler = new QueryHandler(context.getContentResolver());

            Resources r = context.getResources();
            mNowPlayingOverlay = r.getDrawable(R.drawable.indicator_ic_mp_playing_list);
            mDefaultAlbumIcon = (BitmapDrawable) r.getDrawable(R.drawable.albumart_mp_unknown_list);
            // no filter or dither, it's a lot faster and we can't tell the difference
            mDefaultAlbumIcon.setFilterBitmap(false);
            mDefaultAlbumIcon.setDither(false);

            mContext = context;
            getColumnIndices(cursor);
            mResources = context.getResources();
            mAlbumSongSeparator = context.getString(R.string.albumsongseparator);
            mUnknownAlbum = context.getString(R.string.unknown_album_name);
            mUnknownArtist = context.getString(R.string.unknown_artist_name);
        }

        private void getColumnIndices(Cursor cursor) {
            if (cursor != null) {
                mGroupArtistIdIdx = cursor.getColumnIndexOrThrow(MediaStore.Audio.Artists._ID);
                mGroupArtistIdx = cursor.getColumnIndexOrThrow(MediaStore.Audio.Artists.ARTIST);
                mGroupAlbumIdx = cursor.getColumnIndexOrThrow(MediaStore.Audio.Artists.NUMBER_OF_ALBUMS);
                mGroupSongIdx = cursor.getColumnIndexOrThrow(MediaStore.Audio.Artists.NUMBER_OF_TRACKS);
                if (mIndexer != null) {
                    mIndexer.setCursor(cursor);
                } else {
                    mIndexer = new MusicAlphabetIndexer(cursor, mGroupArtistIdx,
                            mResources.getString(R.string.fast_scroll_alphabet));
                }
            }
        }

        public void setActivity(ArtistAlbumBrowserFragment newactivity) {
            mActivity = newactivity;
        }

        public AsyncQueryHandler getQueryHandler() {
            return mQueryHandler;
        }

        @Override
        public View newGroupView(Context context, Cursor cursor, boolean isExpanded, ViewGroup parent) {
            View v = super.newGroupView(context, cursor, isExpanded, parent);
            ImageView iv = (ImageView) v.findViewById(R.id.icon);
            ViewGroup.LayoutParams p = iv.getLayoutParams();
            p.width = ViewGroup.LayoutParams.WRAP_CONTENT;
            p.height = ViewGroup.LayoutParams.WRAP_CONTENT;
            ViewHolder vh = new ViewHolder();
            vh.line1 = (TextView) v.findViewById(R.id.line1);
            vh.line2 = (TextView) v.findViewById(R.id.line2);
            vh.play_indicator = (ImageView) v.findViewById(R.id.play_indicator);
            vh.icon = (ImageView) v.findViewById(R.id.icon);
            vh.icon.setPadding(0, 0, 1, 0);
            v.setTag(vh);
            return v;
        }

        @Override
        public View newChildView(Context context, Cursor cursor, boolean isLastChild, ViewGroup parent) {
            View v = super.newChildView(context, cursor, isLastChild, parent);
            ViewHolder vh = new ViewHolder();
            vh.line1 = (TextView) v.findViewById(R.id.line1);
            vh.line2 = (TextView) v.findViewById(R.id.line2);
            vh.play_indicator = (ImageView) v.findViewById(R.id.play_indicator);
            vh.icon = (ImageView) v.findViewById(R.id.icon);
            vh.icon.setBackgroundDrawable(mDefaultAlbumIcon);
            vh.icon.setPadding(0, 0, 1, 0);
            v.setTag(vh);
            return v;
        }

        @Override
        public void bindGroupView(View view, Context context, Cursor cursor, boolean isexpanded) {

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

            String artist = cursor.getString(mGroupArtistIdx);
            String displayartist = artist;
            boolean unknown = artist == null || artist.equals(MediaStore.UNKNOWN_STRING);
            if (unknown) {
                displayartist = mUnknownArtist;
            }
            vh.line1.setText(displayartist);

            int numalbums = cursor.getInt(mGroupAlbumIdx);
            int numsongs = cursor.getInt(mGroupSongIdx);

            String songs_albums = MusicUtils.makeAlbumsLabel(context, numalbums, numsongs, unknown);

            vh.line2.setText(songs_albums);

            long currentartistid = MusicUtils.getCurrentArtistId();
            long artistid = cursor.getLong(mGroupArtistIdIdx);
            if (currentartistid == artistid && !isexpanded) {
                vh.play_indicator.setImageDrawable(mNowPlayingOverlay);
            } else {
                vh.play_indicator.setImageDrawable(null);
            }
        }

        @Override
        public void bindChildView(View view, Context context, Cursor cursor, boolean islast) {

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

            String name = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Albums.ALBUM));
            String displayname = name;
            boolean unknown = name == null || name.equals(MediaStore.UNKNOWN_STRING);
            if (unknown) {
                displayname = mUnknownAlbum;
            }
            vh.line1.setText(displayname);

            int numsongs = cursor.getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Albums.NUMBER_OF_SONGS));
            int numartistsongs = cursor
                    .getInt(cursor.getColumnIndexOrThrow(MediaStore.Audio.Albums.NUMBER_OF_SONGS_FOR_ARTIST));

            final StringBuilder builder = mBuffer;
            builder.delete(0, builder.length());
            if (unknown) {
                numsongs = numartistsongs;
            }

            if (numsongs == 1) {
                builder.append(context.getString(R.string.onesong));
            } else {
                if (numsongs == numartistsongs) {
                    final Object[] args = mFormatArgs;
                    args[0] = numsongs;
                    builder.append(mResources.getQuantityString(R.plurals.Nsongs, numsongs, args));
                } else {
                    final Object[] args = mFormatArgs3;
                    args[0] = numsongs;
                    args[1] = numartistsongs;
                    args[2] = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Artists.ARTIST));
                    builder.append(mResources.getQuantityString(R.plurals.Nsongscomp, numsongs, args));
                }
            }
            vh.line2.setText(builder.toString());

            ImageView iv = vh.icon;
            // We don't actually need the path to the thumbnail file,
            // we just use it to see if there is album art or not
            String art = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Audio.Albums.ALBUM_ART));
            if (unknown || art == null || art.length() == 0) {
                iv.setBackgroundDrawable(mDefaultAlbumIcon);
                iv.setImageDrawable(null);
            } else {
                long artIndex = cursor.getLong(0);
                Drawable d = MusicUtils.getCachedArtwork(context, artIndex, mDefaultAlbumIcon);
                iv.setImageDrawable(d);
            }

            long currentalbumid = MusicUtils.getCurrentAlbumId();
            long aid = cursor.getLong(0);
            iv = vh.play_indicator;
            if (currentalbumid == aid) {
                iv.setImageDrawable(mNowPlayingOverlay);
            } else {
                iv.setImageDrawable(null);
            }
        }

        @Override
        protected Cursor getChildrenCursor(Cursor groupCursor) {

            long id = groupCursor.getLong(groupCursor.getColumnIndexOrThrow(MediaStore.Audio.Artists._ID));

            String[] cols = new String[] { MediaStore.Audio.Albums._ID, MediaStore.Audio.Albums.ALBUM,
                    MediaStore.Audio.Albums.NUMBER_OF_SONGS, MediaStore.Audio.Albums.NUMBER_OF_SONGS_FOR_ARTIST,
                    MediaStore.Audio.Albums.ALBUM_ART };
            Cursor c = MusicUtils.query(mActivity.getActivity(),
                    MediaStore.Audio.Artists.Albums.getContentUri("external", id), cols, null, null,
                    MediaStore.Audio.Albums.DEFAULT_SORT_ORDER);

            class MyCursorWrapper extends CursorWrapper {
                String mArtistName;
                int mMagicColumnIdx;

                MyCursorWrapper(Cursor c, String artist) {
                    super(c);
                    mArtistName = artist;
                    if (mArtistName == null || mArtistName.equals(MediaStore.UNKNOWN_STRING)) {
                        mArtistName = mUnknownArtist;
                    }
                    mMagicColumnIdx = c.getColumnCount();
                }

                @Override
                public String getString(int columnIndex) {
                    if (columnIndex != mMagicColumnIdx) {
                        return super.getString(columnIndex);
                    }
                    return mArtistName;
                }

                @Override
                public int getColumnIndexOrThrow(String name) {
                    if (MediaStore.Audio.Albums.ARTIST.equals(name)) {
                        return mMagicColumnIdx;
                    }
                    return super.getColumnIndexOrThrow(name);
                }

                @Override
                public String getColumnName(int idx) {
                    if (idx != mMagicColumnIdx) {
                        return super.getColumnName(idx);
                    }
                    return MediaStore.Audio.Albums.ARTIST;
                }

                @Override
                public int getColumnCount() {
                    return super.getColumnCount() + 1;
                }
            }
            return new MyCursorWrapper(c, groupCursor.getString(mGroupArtistIdx));
        }

        @Override
        public void changeCursor(Cursor cursor) {
            if (mActivity.getActivity().isFinishing() && cursor != null) {
                cursor.close();
                cursor = null;
            }
            if (cursor != mActivity.mArtistCursor) {
                mActivity.mArtistCursor = cursor;
                getColumnIndices(cursor);
                super.changeCursor(cursor);
            }
        }

        @Override
        public Cursor runQueryOnBackgroundThread(CharSequence constraint) {
            String s = constraint.toString();
            if (mConstraintIsValid
                    && ((s == null && mConstraint == null) || (s != null && s.equals(mConstraint)))) {
                return getCursor();
            }
            Cursor c = mActivity.getArtistCursor(null, s);
            mConstraint = s;
            mConstraintIsValid = true;
            return c;
        }

        public Object[] getSections() {
            return mIndexer.getSections();
        }

        public int getPositionForSection(int sectionIndex) {
            return mIndexer.getPositionForSection(sectionIndex);
        }

        public int getSectionForPosition(int position) {
            return 0;
        }
    }

    public void onServiceConnected(ComponentName name, IBinder service) {
        MusicUtils.updateNowPlaying(getActivity());
    }

    public void onServiceDisconnected(ComponentName name) {
        mArtistCursor.close();

    }
}