在我的mainActivity
中,我有一个抽屉定义,将用抽屉中的选定项目替换mainActivity
约束布局(作为片段)。
@Override
public boolean onNavigationItemSelected(MenuItem item) {
int id = item.getItemId();
/**
* Perform logout logic if logout is selected, otherwise go display corresponding screen
*/
if (id == R.id.nav_logout) {
logout(null, true);
} else {
switch(id) {
case R.id.nav_event:
fragment = new EventDashboard();
Log.d(logTag, "showing Event screen " + fragment.toString());
fragmentTag = "event";
break;
case R.id.nav_contacts:
fragment = new Contacts();
Log.d(logTag, "showing Contact screen " + fragment.toString());
fragmentTag = "contacts";
break;
}
if (fragment != null) {
android.support.v4.app.FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.replace(R.id.content_main, fragment, fragmentTag);
ft.commit();
}
DrawerLayout drawer = findViewById(R.id.drawer_layout);
drawer.closeDrawer(GravityCompat.START);
}
return true;
}
此EventDashboard片段中有两个选项卡(SectionPagerAdapter),UpComing事件和过去事件,我可以在每个选项卡之间滑动没问题。联系人只是一个显示用户信息的简单布局。
这段代码一直运行良好,直到最近我才将searchView添加到事件页面。
通过qazxsw poi将qazxsw poi添加到qazxsw poi片段中
searchView
在EventDashboard
和onCreateOptionMenu
片段中,我有以下代码:
public class EventDashboard extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
/**
* Enable option menu
*/
setHasOptionsMenu(true);
return inflater.inflate(R.layout.fragment_event, container, false);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
//super.onCreateOptionsMenu(menu, inflater);
/**
* Inflate menu
*/
inflater.inflate(R.menu.event_menu, menu);
super.onCreateOptionsMenu(menu, inflater);
}
...
}
EventTabUpComing
的代码非常相似,只是它显示的数据不同。搜索按钮工作得很好,我可以在每个选项卡中过滤任何事件没有问题。
现在,问题是我一扫到EventTabPast
片段中的不同选项卡,然后从抽屉中选择Contact,它现在抛出异常,如下所示,我不明白,而当前片段被所选片段替换,为什么它试图从之前的片段调用public class EventTabUpcoming extends Fragment implements SearchView.OnQueryTextListener {
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View view = inflater.inflate(R.layout.event_tab_upcoming, container, false);
Log.d(logTag, "Showing Up-Coming events");
sectionAdapter = new SectionedRecyclerViewAdapter();
Log.i(logTag, "create recyclerView");
RecyclerView recyclerView = (RecyclerView) view.findViewById(R.id.listUpcomingEvent);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
recyclerView.addItemDecoration(new DividerItemDecoration(getActivity(), DividerItemDecoration.VERTICAL));
recyclerView.setAdapter(sectionAdapter);
setHasOptionsMenu(true);
return view;
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
/**
* Inflate menu
*/
MenuItem item = menu.findItem(R.id.action_event_search);
searchView = (SearchView) MenuItemCompat.getActionView(item);
searchView.setOnQueryTextListener(this);
}
}
。奇怪的是,如果我不滑动到EventTabPast
片段中的不同选项卡,切换到Contact片段将没有问题。
这是一个例外:
EventDashboard
如跟踪所示,mainActivity已经加载了新的片段Contact,但由于某种原因,它还尝试调用onCreateOptionMenu。有问题的行是EventTabPast.java:94,它是“searchView =(SearchView)MenuItemCompat.getActionView(item);”
onCreateOptionMenu
每当在片段中写入onCreateOptionsMenu()时,它意味着它在Fragment的父活动上创建
您在Contact Fragment的onResume()中编写以下代码
EventDashboard