首先：

getActionBar().setDisplayShowTitleEnabled(false);

		ActionBar.LayoutParams lp = new ActionBar.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);

		lp.gravity = lp.gravity & ~Gravity.HORIZONTAL_GRAVITY_MASK | Gravity.LEFT;

		ActionBarPopupButton popupButton = new ActionBarPopupButton(this);

		popupButton.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {

			@Override

			public boolean onMenuItemClick(MenuItem item) {

				Intent intent = new Intent();

				intent.setClass(MainActivity.this, cls[item.getOrder()]);

				intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);

				if (item.getOrder() == 0) {

					intent.putExtra(Extras.DATE, mDates.get(mViewPager.getCurrentItem()));

				}

				startActivity(intent);

				return false;

			}

		});

		getActionBar().setCustomView(popupButton, lp);

		int change = getActionBar().getDisplayOptions() ^ ActionBar.DISPLAY_SHOW_CUSTOM;

		getActionBar().setDisplayOptions(change, ActionBar.DISPLAY_SHOW_CUSTOM);

private Class<?>[] cls = new Class[] { HistoryActivity.class, VibrateActivity.class, CircleActivity.class, PersonalActivity.class, DeviceActivity.class };

第二：

public class ActionBarPopupButton extends Button implements OnClickListener {

	private PopupMenu mPopupMenu;

	public ActionBarPopupButton(Context context) {

		super(context);

		setBackgroundResource(R.drawable.abc_spinner_ab_holo_dark);

		setTextAppearance(getContext(), android.R.style.Widget_Spinner);

		setText(getContext().getString(R.string.title_activity_detail));

		setTextColor(getResources().getColor(R.color.white));

		setOnClickListener(this);

		mPopupMenu = new PopupMenu(getContext(), this);

		mPopupMenu.inflate(R.menu.main_navigation_list);

	}

	@Override

	public void onClick(View v) {

		mPopupMenu.show();

	}

	public void setOnMenuItemClickListener(OnMenuItemClickListener listener) {

		mPopupMenu.setOnMenuItemClickListener(listener);

	}

}

setBackgroundResource 图片

setTextAppearance  样式

setText  文本内容

setTextColor   颜色

main_navigation_list  XML

<menu xmlns:android="http://schemas.android.com/apk/res/android" >

    <item

        android:orderInCategory="0"

        android:showAsAction="never"

        android:title="@string/title_activity_history"/>

    <item

        android:orderInCategory="1"

        android:showAsAction="never"

        android:title="@string/title_activity_vibrate"/>

    <item

        android:orderInCategory="2"

        android:showAsAction="never"

        android:title="@string/title_activity_circle_2"/>

    <item

        android:orderInCategory="3"

        android:showAsAction="never"

        android:title="@string/title_activity_personal"/>

    <item

        android:orderInCategory="4"

        android:showAsAction="never"

        android:title="@string/title_activity_device"/>

</menu>