ArtistsFragment.java

package com.nf2m.fragment;

import android.annotation.TargetApi;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Build;
import android.os.Bundle;
import android.provider.MediaStore;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v4.content.ContextCompat;
import android.support.v7.graphics.Palette;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.widget.RelativeLayout;

import com.nf2m.R;
import com.nf2m.activity.TarMediaPlayerActivity;
import com.nf2m.adapter.ArtistCursorAdapter;
import com.nf2m.listener.ActionItemClick;
import com.nf2m.listener.OnItemClickListener;
import com.nf2m.model.Artists;
import com.nf2m.model.Library;
import com.nf2m.model.Songs;

public class ArtistsFragment extends BaseFragment implements ActionItemClick, OnItemClickListener {


    public static final String EXTRA_ARTIST = "artist";
    private RecyclerView lvArtistsList;
    private Library artists;
    private Cursor artistCursor;
    private ArtistCursorAdapter artistAdapter;


    @TargetApi(Build.VERSION_CODES.KITKAT)
    @Override
    public void onViewCreated(View view, Bundle savedInstanceState) {
        initLvArtistList();
        initArtists();
        initArtistCursor();
        initArtistCursorAdapter();
        lvArtistListSetSongAdapter();

        if (artistCursor.getCount() == 0) {
//            RelativeLayout noSongs = (RelativeLayout) view.findViewById(R.id.noSongs);
//            noSongs.setVisibility(View.VISIBLE);
        }

        setLayoutManager();

        setListeners();

        fastScroller.setVisibility(View.GONE);

        super.onViewCreated(view, savedInstanceState);


        setSearchSelection(MediaStore.Audio.ArtistColumns.ARTIST);

        ((TarMediaPlayerActivity) getActivity()).setActionBarTitle(getString(R.string.title_artists));
    }



    private void setListeners() {
        artistAdapter.setOnItemClickListener(this);
        artistAdapter.setOnLongItemClickListener(this);
    }

    private void lvArtistListSetSongAdapter() {
        lvArtistsList.setAdapter(artistAdapter);
        setLvLibraryList(lvArtistsList);
    }

    private void initArtistCursorAdapter() {
        artistAdapter = new ArtistCursorAdapter(getActivity(), artistCursor);
        setLibraryAdapter(artistAdapter);
    }

    private void initArtistCursor() {
        artistCursor = artists.getCursor();
        setLibraryCursor(artistCursor);
    }

    private void initArtists() {
        artists = new Artists(getActivity());
        setLibraries(artists);
    }

    private void initLvArtistList() {
        lvArtistsList = (RecyclerView) view.findViewById(R.id.lvList);

    }

    @Nullable
    @Override
    public Cursor initSelectedItemCursor() {
        Library songs = new Songs(getContext());
        String[] artistsName = getStringArray(MediaStore.Audio.ArtistColumns.ARTIST);

        String selection = getSelection(MediaStore.Audio.AudioColumns.ARTIST, artistsName);
        Cursor cursor = getContext().getContentResolver().query(songs.getUri(), null, selection,
                null, songs.getSortOrder());
        assert cursor != null;
        setSelectedSongNumber(cursor.getCount());
        return cursor;
    }

    private String getStringInCursor(@NonNull Cursor cursor, String uri) {
        return cursor.getString(artistCursor.getColumnIndexOrThrow(uri));
    }

    @Override
    public void actionClick(int position) {
        artistCursor.moveToPosition(position);

        String artistsName = getStringInCursor(artistCursor,
                MediaStore.Audio.ArtistColumns.ARTIST);

        ArtistAlbumFragment artistSongFragment = new ArtistAlbumFragment();
        Bundle bundle = new Bundle();
        bundle.putString(EXTRA_ARTIST, artistsName);
        artistSongFragment.setArguments(bundle);
        if (TarMediaPlayerActivity.sdkInt >= Build.VERSION_CODES.LOLLIPOP) {
            initAnim(artistSongFragment);
        }
        isArtist = true;
        getFragmentManager().beginTransaction().replace(R.id.container, artistSongFragment).
                addToBackStack(artistSongFragment.getClass().getName()).commit();
    }


    @Override
    public void onItemClick(int position) {
        if (actionMode != null) {
            toggleSelection(position);
            return;
        }

        if (isFilter) {
            position = getPositionInMainCursor(position);
            actionClick(position);
            searchView.clearFocus();
        } else {
            actionClick(position);
        }

    }

    @Override
    public void onDestroy() {
        artistCursor.close();
        super.onDestroy();
    }

    @Override
    public void setLayoutManager() {

    }
}