Backwards compatible Contextual Action Mode

CamCompatListView

import android.content.Context;
import android.support.v7.view.ActionMode;
import android.util.AttributeSet;
import android.view.View;
import android.widget.AbsListView;
import android.widget.ListView;

public class CamCompatListView extends ListView
{
    public CamCompatListView(Context context)
    {
        super(context);
    }

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

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

    private ActionMode actionMode;

    public void setActionMode(ActionMode mode)
    {
        actionMode = mode;
    }

    @Override
    public boolean performItemClick(View view, int position, long id)
    {
        if (actionMode == null)
        {
            setChoiceMode(AbsListView.CHOICE_MODE_NONE);
        }

        boolean returnValue = super.performItemClick(view, position, id);

        if (actionMode != null)
        {
            actionMode.invalidate();
        }

        return returnValue;
    }
}

MyActivity

import android.annotation.SuppressLint;
import android.support.v7.app.ActionBarActivity;
import android.support.v7.view.ActionMode;
import android.util.SparseBooleanArray;
import android.view.HapticFeedbackConstants;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AbsListView;
import android.widget.AdapterView;
import android.widget.ListView;

public class MyActivity extends ActionBarActivity
    implements ActionMode.Callback, AdapterView.OnItemLongClickListener,
            AdapterView.OnItemClickListener
{
    ActionMode actionMode = null;

    CamCompatListView listView;

    @SuppressLint("NewApi")
    public void initialize(CamCompatListView listView)
    {
        listView.setChoiceMode(AbsListView.CHOICE_MODE_NONE);
        listView.setOnItemLongClickListener(this);
        listView.setOnItemClickListener(this);
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id)
    {
        if (actionMode == null)
        {
            // Code you want on a normal click of an item
        }
    }

    @Override
    public boolean onActionItemClicked(ActionMode mode, MenuItem item)
    {
        int itemId = item.getItemId();

        if (itemId == R.id.myAction)
        {
            SparseBooleanArray checked = listView.getCheckedItemPositions();

            if (checked != null)
            {
                for (int i = 0 ; i < checked.size(); i++)
                {
                    if(checked.valueAt(i))
                    {
                        // Perform action on the item
                    }
                }
            }

            mode.finish();

            return true;
        }

        return false;
    }

    @SuppressLint("NewApi")
    @Override
    public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id)
    {
        if (actionMode == null)
        {
            // This needs to be done early, because it will clear selections on the list
            startSupportActionMode(this);
        }

        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
        listView.setItemChecked(position, !listView.isItemChecked(position));
        listView.performHapticFeedback(HapticFeedbackConstants.LONG_PRESS);

        actionMode.invalidate();

        return true;
    }

    @Override
    public boolean onCreateActionMode(ActionMode mode, Menu menu)
    {
        mode.getMenuInflater().inflate(R.menu.my_context_menu, menu);

        actionMode = mode;
        listView.setActionMode(mode);

        return true;
    }

    @SuppressLint("NewApi")
    @Override
    public void onDestroyActionMode(ActionMode mode)
    {
        SparseBooleanArray checked = listView.getCheckedItemPositions();

        if (checked != null)
        {
            for(int i = checked.indexOfValue(true); i >= 0; i = checked.indexOfValue(true))
            {
                listView.setItemChecked(checked.keyAt(i), false);
            }
        }

        listView.setActionMode(null);
        actionMode = null;
    }

    @Override
    public boolean onPrepareActionMode(ActionMode mode, Menu menu)
    {
        SparseBooleanArray checked = listView.getCheckedItemPositions();

        int numberChecked = 0;

        if (checked != null)
        {
            for (int i = 0 ; i < checked.size(); i++)
            {
                if(checked.valueAt(i))
                {
                    numberChecked++;
                }
            }
        }

        if (numberChecked > 0)
        {            
            mode.setTitle(getResources().getQuantityString(R.plurals.itemsSelected, numberChecked, numberChecked));
        }
        else
        {
            mode.finish();
        }

        return true;
    }
}

Excelent, I just implemented and Its working great in gingerbread. Thank you so much.