根据ViewPager中的Fragment更改ActionItems

Question

我有一项活动实施ViewPager。它有两个碎片。我想在ActionItems上添加ActionBar根据当前哪个片段处于活动状态。我没有在Activity上添加菜单项。这是我的两个片段的代码。

对于片段A：

@Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        menu.clear();
        inflater.inflate(R.menu.menu_one, menu);
        MenuItem searchItem = menu.findItem(R.id.searchWidgetOne);
        SearchView search = new SearchView(getActivity());
        search.setOnQueryTextListener(this);
        searchItem.setActionView(search);
    }

        @Override
        public boolean onOptionsItemSelected(MenuItem item) {

            switch(item.getItemId())
            {
            case R.id.action_items_one:
                Intent addCrInent = new Intent(getActivity(), ActivityA.class);
                startActivity(addCrInent);

                return true;
            case  R.id.action_items_two:
                Intent addStIntent = new Intent(getActivity(), ActivityB.class);
                startActivity(addStIntent);

                return true;
            default:
                return false;
            }

    }

对于片段B：

@Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        menu.clear();
        inflater.inflate(R.menu.menu_second, menu);
        MenuItem searchItem = menu.findItem(R.id.searchWidgetTwo);
        SearchView search = new SearchView(getActivity());
        search.setOnQueryTextListener(this);
        searchItem.setActionView(search);
    }

        @Override
        public boolean onOptionsItemSelected(MenuItem item) {

            switch(item.getItemId())
            {
            case R.id.action_items_one_secondMenu:
                Intent addCrInent = new Intent(getActivity(), ActivityA.class);
                startActivity(addCrInent);

                return true;
            case  R.id.action_items_two_secondMenu:
                Intent addStIntent = new Intent(getActivity(), ActivityB.class);
                startActivity(addStIntent);

                return true;
            default:
                return false;
            }

    }

对于两个碎片，在MY onCreate中，我写了这一行：

        setHasOptionsMenu(true);

这是我的menu_one.xml：

<?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android" >
<item
    android:id="@+id/searchWidgetOne"
    android:actionViewClass="android.widget.SearchView"
    android:icon="@drawable/ic_action_search"
    android:orderInCategory="1"
    android:showAsAction="always|collapseActionView"
    android:title="@string/action_search"/>

<item
    android:id="@+id/action_items_one"
    android:icon="@drawable/ic_action_new_event"
    android:orderInCategory="2"
    android:showAsAction="ifRoom"
    android:title="@string/add_course"/>

    <item
    android:id="@+id/action_items_two"
    android:icon="@drawable/ic_action_add_person"
    android:orderInCategory="3"
    android:showAsAction="ifRoom"
    android:title="@string/add_student"/>

这是我的menu_second.xml：

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android" >

<item
    android:id="@+id/searchWidgetTwo"
    android:actionViewClass="android.widget.SearchView"
    android:icon="@drawable/ic_action_search"
    android:orderInCategory="1"
    android:showAsAction="always|collapseActionView"
    android:title="@string/action_search"/>

<item
    android:id="@+id/action_items_one_secondMenu"
    android:icon="@drawable/ic_action_new_event"
    android:orderInCategory="2"
    android:showAsAction="ifRoom"
    android:title="@string/add_course"/>

    <item
    android:id="@+id/action_items_two_secondMenu"
    android:icon="@drawable/ic_action_add_person"
    android:orderInCategory="3"
    android:showAsAction="ifRoom"
    android:title="@string/add_student"/>