MyListActivityActionbar.java

package com.pinecone.technology.mcommerce.learning.android.chapter10.contextual.listview;

import android.app.ListActivity;
import android.os.Bundle;
import android.view.ActionMode;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemLongClickListener;
import android.widget.Toast;

public class MyListActivityActionbar extends ListActivity {

	protected Object mActionMode;
	public int selectedItem = -1;

	public void onCreate(Bundle icicle) {
		super.onCreate(icicle);
		String[] values = new String[] { "Android", "iPhone", "WindowsMobile",
				"Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X",
				"Linux", "OS/2", "Ubuntu", "Windows7", "Max OS X", "Linux",
				"OS/2", "Ubuntu", "Windows7", "Max OS X", "Linux", "OS/2" };

		MySimpleArrayAdapter adapter = new MySimpleArrayAdapter(this, values);
		setListAdapter(adapter);

		getListView().setOnItemLongClickListener(new OnItemLongClickListener() {

			@Override
			public boolean onItemLongClick(AdapterView<?> parent, View view,
					int position, long id) {

				if (mActionMode != null) {
					return false;
				}
				selectedItem = position;

				// Start the CAB using the ActionMode.Callback defined above
				MyListActivityActionbar.this
						.startActionMode(mActionModeCallback);
				view.setSelected(true);
				return true;
			}
		});
	}

	private ActionMode.Callback mActionModeCallback = new ActionMode.Callback() {

		// Called when the action mode is created; startActionMode() was called
		public boolean onCreateActionMode(ActionMode mode, Menu menu) {
			// Inflate a menu resource providing context menu items
			MenuInflater inflater = mode.getMenuInflater();
			// Assumes that you have "contexual.xml" menu resources
			inflater.inflate(R.menu.main, menu);
			return true;
		}

		// Called each time the action mode is shown. Always called after
		// onCreateActionMode, but
		// may be called multiple times if the mode is invalidated.
		public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
			return false; // Return false if nothing is done
		}

		// Called when the user selects a contextual menu item
		public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
			switch (item.getItemId()) {
			case R.id.menuitem1_show:
				show();
				// Action picked, so close the CAB
				mode.finish();
				return true;
			default:
				return false;
			}
		}

		// Called when the user exits the action mode
		public void onDestroyActionMode(ActionMode mode) {
			mActionMode = null;
			selectedItem = -1;
		}
	};

	private void show() {
		Toast.makeText(MyListActivityActionbar.this,
				String.valueOf(selectedItem), Toast.LENGTH_LONG).show();
	}

}