Android动态设置actionBar

public boolean isOpen = flase;//默认为false

	@Override
	public boolean onCreateOptionsMenu(Menu menu) {

		getMenuInflater().inflate(R.menu.news_ds_menu, menu);
		return true;//显示出来
	}

	public void isRightBtnHide() {
		isOpen = true;
	}

	@Override
	public boolean onPrepareOptionsMenu(Menu menu) {//在这里将菜单隐藏

		menu.findItem(R.id.news_share_item).setVisible(isOpen);	
		return super.onPrepareOptionsMenu(menu);
	}

isRightBtnOpen();//将其状态设置为true
invalidateOptionsMenu();//重新调用<pre name="code" class="java">onCreateOptionsMenu、<span style="font-family: Arial, Helvetica, sans-serif;">onPrepareOptionsMenu将其显示出来</span>

1、原生

mActivity.getWindow().invalidatePanelMenu(Window.FEATURE_OPTIONS_PANEL);
2、ActionBarSherlock

invalidateOptionsMenu();