SmartExpandableListAdapter.java

package com.smart.framework;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.SimpleExpandableListAdapter;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

public class SmartExpandableListAdapter extends SimpleExpandableListAdapter {

    private Context context;
    @SuppressWarnings("unused")
    private List<? extends Map<String, ?>> groupData;
    @SuppressWarnings("unused")
    private int groupLayout;
    @SuppressWarnings("unused")
    private String[] groupFrom;
    @SuppressWarnings("unused")
    private int[] groupTo;
    @SuppressWarnings("unused")
    private List<? extends List<? extends Map<String, ?>>> childData;
    @SuppressWarnings("unused")
    private int childLayout;
    @SuppressWarnings("unused")
    private String[] childFrom;
    @SuppressWarnings("unused")
    private int[] childTo;

    private ArrayList<SmartExpandableListItem> items;

    private ExpandableItemView target;

    private ArrayList<View> childViewSet;
    private ArrayList<View> groupViewSet;

    public SmartExpandableListAdapter(Context context, List<? extends Map<String, ?>> groupData, int groupLayout,
                                      String[] groupFrom, int[] groupTo, List<? extends List<? extends Map<String, ?>>> childData, int childLayout,
                                      String[] childFrom, int[] childTo, ArrayList<SmartExpandableListItem> items, ExpandableItemView target) {
        super(context, groupData, groupLayout, groupFrom, groupTo, childData, childLayout, childFrom, childTo);

        this.context = context;
        this.groupData = groupData;
        this.groupLayout = groupLayout;
        this.groupFrom = groupFrom;
        this.groupTo = groupTo;
        this.childData = childData;
        this.childLayout = childLayout;
        this.childFrom = childFrom;
        this.childTo = childTo;
        this.items = items;
        this.target = target;

        prepareViewSets();

    }

    private void prepareViewSets() {
        prepareGroupViewSet();
        prepareChildViewSet();
    }

    private void prepareChildViewSet() {
        childViewSet.clear();

        LayoutInflater vi = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        int i = 0;
        for (SmartExpandableListItem item : items) {
            View v = vi.inflate(item.getchildItemLayout(), null);
            target.setItemView(i, v, item);
            childViewSet.add(v);
            i++;
        }

    }

    private void prepareGroupViewSet() {
        groupViewSet.clear();

        LayoutInflater vi = (LayoutInflater) this.context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

        int i = 0;
        for (SmartExpandableListItem item : items) {
            View v = vi.inflate(item.getgroupItemLayout(), null);
            target.setItemView(i, v, item);
            groupViewSet.add(v);
            i++;
        }
    }

    @Override
    public View getGroupView(int groupPosition, boolean isExpanded, View convertView, ViewGroup parent) {
        return groupViewSet.get(groupPosition);
    }

    @Override
    public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) {
        return childViewSet.get(childPosition);
    }


}