SlideExpandableListView.java

package com.tjerkw.slideexpandable.library;

import android.os.Parcelable;
import android.util.AttributeSet;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ListAdapter;
import android.widget.ListView;
import android.content.Context;

/**
 * Simple subclass of listview which does nothing more than wrap
 * any ListAdapter in a SlideExpandalbeListAdapter
 */
class SlideExpandableListView extends ListView {
    private SlideExpandableListAdapter adapter;

    public SlideExpandableListView(Context context) {
        super(context);
    }

    public SlideExpandableListView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public SlideExpandableListView(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);
    }

    /**
     * Collapses the currently open view.
     *
     * @return true if a view was collapsed, false if there was no open view.
     */
    public boolean collapse() {
        if (adapter != null) {
            return adapter.collapseLastOpen();
        }
        return false;
    }

    public void setAdapter(ListAdapter adapter) {
        this.adapter = new SlideExpandableListAdapter(adapter);
        super.setAdapter(this.adapter);
    }

    public SlideExpandableListAdapter getSlideAdapter() {
        return adapter;
    }

    public void setAdapter(ListAdapter adapter, int toggle_button_id, int long_toggle_button_id, int expandable_view_id) {
        this.adapter = new SlideExpandableListAdapter(adapter, toggle_button_id, long_toggle_button_id, expandable_view_id);
        super.setAdapter(this.adapter);
    }

    /**
     * Registers a OnItemClickListener for this listview which will
     * expand the item by default. Any other OnItemClickListener will be overriden.
     * <p/>
     * To undo call setOnItemClickListener(null)
     * <p/>
     * Important: This method call setOnItemClickListener, so the value will be reset
     */
    public void enableExpandOnItemClick() {
        this.setOnItemClickListener(new OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
                SlideExpandableListAdapter adapter = (SlideExpandableListAdapter) getAdapter();
                adapter.getExpandToggleButton(view).performClick();
            }
        });
    }


//    @Override
//    public Parcelable onSaveInstanceState() {
//        return adapter.onSaveInstanceState(super.onSaveInstanceState());
//    }
//
//    @Override
//    public void onRestoreInstanceState(Parcelable state) {
//        if (!(state instanceof AbstractSlideExpandableListAdapter.SavedState)) {
//            super.onRestoreInstanceState(state);
//            return;
//        }
//
//        AbstractSlideExpandableListAdapter.SavedState ss = (AbstractSlideExpandableListAdapter.SavedState) state;
//        super.onRestoreInstanceState(ss.getSuperState());
//
//        adapter.onRestoreInstanceState(ss);
//    }
}