片段中的SearchView（活动中的膨胀菜单）

Question

我在SearchView.onQueryTextListener上获得NPE。

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

<item
    android:id="@+id/order_menu_search"
    android:icon="@drawable/ic_search"
    android:title="@string/order_menu_search"
    app:actionViewClass="android.support.widget.v7.SearchView"
    app:showAsAction="ifRoom|withText" />

<item
    android:id="@+id/order_menu_checkmark"
    android:icon="@drawable/ic_checkmark"
    android:title="@string/order_toolbar"
    app:showAsAction="ifRoom|withText" />

    @Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.order_toolbar, menu);
    mMenuCheckmark = menu.findItem(R.id.order_menu_checkmark);
    mMenuCheckmark.setVisible(false);
    return super.onCreateOptionsMenu(menu);
}

    @Override
public void onPrepareOptionsMenu(Menu menu){
    MenuItem menuItem = menu.findItem(R.id.order_menu_search);
    SearchView searchView = (SearchView) menuItem.getActionView();
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String query) {
            return false;
        }

        @Override
        public boolean onQueryTextChange(String newText) {
        Toast.makeText(getActivity(), "" +newText, Toast.LENGTH_SHORT).show();
            return false;
        }
    });
}

setHasOptionsMenu(true);

已添加到oncreate中

我也尝试了这个：1。在fragment（活动中移除onCreateOptionsMenu)2中膨胀菜单。将menuItem（复选标记）传递回活动槽界面，这样我就可以访问复选标记3。如果在searchview上设置监听器，则仍然获得NPE

Answer 1

我在片段中制作选项菜单。像这样，

@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
                         @Nullable Bundle savedInstanceState) {
...
setHasOptionsMenu(true);
...
}


@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    super.onCreateOptionsMenu(menu, inflater);
    inflater.inflate(R.menu.fragment_menu, menu);
    menu.findItem(R.id.menu_1).setIcon(ContextCompat.getDrawable(activity, R.drawable.ic_bar_search));
    searchView = (SearchView) menu.findItem(R.id.menu_1).getActionView();
    searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
        @Override
        public boolean onQueryTextSubmit(String s) {
            return false;
        }

        @Override
        public boolean onQueryTextChange(String s) {
            return false;
        }
    });
    searchView.setOnCloseListener(new SearchView.OnCloseListener() {
        @Override
        public boolean onClose() {
            return false;
        }
    });
....
}  

不确定，您可以从OnCreateOptionsMenu调用“SearchView.SetOnQueryTextListener”。