LibraryCursorAdapter.java

package com.nf2m.adapter;

import android.annotation.SuppressLint;
import android.content.Context;
import android.database.Cursor;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.SectionIndexer;

import com.nf2m.listener.OnItemClickListener;
import com.nf2m.listener.OnItemLongClickListener;
import com.nf2m.section.AlphabetGroup;

import java.util.HashMap;
import java.util.LinkedList;
import java.util.List;

@SuppressLint("UseSparseArrays")
public abstract class LibraryCursorAdapter<VH extends RecyclerView.ViewHolder> extends RecyclerView.Adapter<VH> implements SectionIndexer {

    private static final String TAG = "Position List";
    @NonNull
    private final HashMap<Integer, Boolean> selectionList;
    @NonNull
    private final List<Integer> positionList;
    private final String searchUri;
    @Nullable
    private Cursor cursor;
    private final LayoutInflater inflater;
    OnItemClickListener clickListener;
    OnItemLongClickListener longClickListener;

    @SuppressWarnings("deprecation")
    LibraryCursorAdapter(Context context, Cursor c, String searchUri) {

        cursor = c;
        this.searchUri = searchUri;
        inflater = LayoutInflater.from(context);
        selectionList = new HashMap<>();
        positionList = new LinkedList<>();
    }

    @Nullable
    Cursor getCursor() {
        return cursor;
    }

    public void swapCursor(@Nullable Cursor newCursor) {
        if (newCursor != null) {
            cursor = newCursor;
            notifyDataSetChanged();
        }
    }

    //Listede yeni bir öge seçilirse bu metod çağrılır.
    public void addNewSelection(int position, boolean check) {
        selectionList.put(position, check);
        positionList.add(position);
        notifyItemChanged(position);
        Log.i(TAG, positionList.toString());
    }

    //Listedeki seçili bir ögeyi seçimini kaldırır
    public void removeSelection(int position) {
        int location = getLocation(position);
        positionList.remove(location);
        selectionList.remove(position);
        notifyItemChanged(position);
        Log.i(TAG, positionList.toString());
    }

    @NonNull
    public List<Integer> getPositionList() {
        return positionList;
    }

    public boolean isPositionChecked(int position) {
        return selectionList.get(position) != null;
    }

    private int getLocation(int position) {
        int location = 0;
        for (int i = 0; i < positionList.size(); i++) {
            if (position == positionList.get(i)) {
                location = i;
                break;
            }
        }
        return location;
    }

    public void clearSelection() {
        selectionList.clear();
        positionList.clear();
        notifyDataSetChanged();
    }

    public void selectAllItem() {
        clearSelection();
        for (int i = 0; i < cursor.getCount(); i++) {
            addNewSelection(i, true);
        }
    }

    public void removeSelectAllItems() {
        for (int i = 1; i < cursor.getCount(); i++) {
            removeSelection(i);
        }
    }


    int getColumnIndex(String uri) {
        return cursor.getColumnIndexOrThrow(uri);
    }

    View inflateCustomViewAndListView(ViewGroup parent, int resId) {
        return inflater.inflate(resId, parent, false);
    }


    @NonNull
    public static String convertMinuteToMillis(int millis) {
        int minute = 0;
        int second = millis / 1000;
        while (second > 60) {
            minute++;
            second -= 60;
        }
        if (second < 10) {
            return minute + ":0" + second;
        }
        return minute + ":" + second;

    }

    public void setOnItemClickListener(final OnItemClickListener clickListener) {
        this.clickListener = clickListener;
    }

    public void setOnLongItemClickListener(OnItemLongClickListener itemLongClickListener) {
        this.longClickListener = itemLongClickListener;
    }

    @Override
    public Object[] getSections() {
        return AlphabetGroup.values();
    }

    @Override
    public int getPositionForSection(int sectionIndex) {
        return 0;
    }

    @Override
    public int getSectionForPosition(int position) {
        if (position >= cursor.getCount()) {
            position = cursor.getCount() - 1;
        }

        if (cursor.getCount() != 0) {
            cursor.moveToPosition(position);
            String songTitle = cursor.getString(cursor.getColumnIndexOrThrow(searchUri));
            return compareGroup(songTitle);
        }

        return 0;

    }

    private int compareGroup(@NonNull String songTitle) {
        for (AlphabetGroup alphabetGroup : AlphabetGroup.values()) {
            if (alphabetGroup.getmGroupName().equalsIgnoreCase(String.valueOf(songTitle.charAt(0)))) {
                return alphabetGroup.ordinal();
            }
        }

        return AlphabetGroup.None.ordinal();

    }

}