Android 在某些片段中隐藏 MenuItem

Hide MenuItem in some Fragments

提问by pavol.franek

I using menu drawer which has more Fragments. In some Fragments I have menu item REFRESH but in some fragments I want hide this menu item (I don't want show menu but I don't want hide ActionBar).

我使用有更多Fragments 的菜单抽屉。在某些Fragments 我有菜单项 REFRESH 但在某些片段中我想隐藏这个菜单项（我不想显示菜单但我不想隐藏ActionBar）。

I try add override onCreateOptionsMenu()to Fragmentwhere I don't want show this menu item but I can not get it to work. I try many way see commented line in code. Does any idea where is problem? And last this menu item go to hide when I activate menu drawer when is called onPrepareOptionsMenu()in MainActivity but I need do this when I'm in Fragment.

我尝试将覆盖添加onCreateOptionsMenu()到Fragment我不想显示此菜单项的位置，但我无法让它工作。我尝试了很多方法来查看代码中的注释行。知道问题出在哪里吗？最后，当我onPrepareOptionsMenu()在 MainActivity 中调用时激活菜单抽屉时，此菜单项会隐藏，但是当我在Fragment.

Fragmentwhere I want hide menu item REFRESH:

Fragment我想隐藏菜单项刷新的地方：

 public class FindPeopleFragment extends Fragment {
    public FindPeopleFragment(){}

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.fragment_find_people, container, false);
        //setHasOptionsMenu(false);
        return rootView;
    }

    private Menu menu=null;
    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater)
    {
        inflater.inflate(R.menu.main, menu);
        this.menu=menu;
        menu.findItem(R.id.refresh).setVisible(false);
        getActivity().invalidateOptionsMenu();
        //setHasOptionsMenu(false);
        super.onCreateOptionsMenu(menu,inflater);
    }
}

MainActivity where is defined MENU DRAWER:

MainActivity 在哪里定义了 MENU DRAWER：

 //Slide menu item click listener
private class SlideMenuClickListener implements
        ListView.OnItemClickListener {
    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position,
                            long id) {
        // display view for selected nav drawer item
        displayView(position);
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // toggle nav drawer on selecting action bar app icon/title
    if (mDrawerToggle.onOptionsItemSelected(item)) {
        return true;
    }
    switch (item.getItemId()) {
        case R.id.refresh:
            Toast.makeText(this, "Refreshing data...", Toast.LENGTH_SHORT).show();
            return true;
    }
    return super.onOptionsItemSelected(item);
}

 // Called when invalidateOptionsMenu() is triggered
@Override
public boolean onPrepareOptionsMenu(Menu menu) {
    // if nav drawer is opened, hide the action items
    boolean drawerOpen = mDrawerLayout.isDrawerOpen(mDrawerList);
    menu.findItem(R.id.refresh).setVisible(!drawerOpen);
    return super.onPrepareOptionsMenu(menu);
}

采纳答案by Luis

In the Fragmentwhere you don't want to show any menu options, you need setHasOptionsMenu(false);in the onCreate(), like this:

在Fragment您不想显示任何菜单选项的地方，您需要setHasOptionsMenu(false);在 中onCreate()，如下所示：

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setHasOptionsMenu(false);
}

However, the menu that is being shown that you would like to hide (REFRESH), belongs to MainActivity. That is why it is always shown. Since you want to control the menu at the Fragmentlevel (and not show an Activityoptions menu), my suggestion is to delete the menu code from the Activityand implement it in your Fragment.

但是，正在显示的要隐藏（刷新）的菜单属于 MainActivity。这就是它始终显示的原因。由于您想在Fragment级别控制菜单（而不是显示Activity选项菜单），我的建议是从 中删除菜单代码Activity并在您的Fragment.

Activitys and Fragments can each have their own separate menus. See this link.

Activitys 和Fragments 都可以有自己独立的菜单。请参阅此链接。

回答by pratham kesarkar

In the fragment where you want to hide the Item

在要隐藏项目的片段中

@Override
public void onPrepareOptionsMenu(Menu menu) {
    MenuItem item=menu.findItem(R.id.action_search);
    if(item!=null)
       item.setVisible(false);
}

and in onCreate() of your fragment

并在您的片段的 onCreate() 中

 setHasOptionsMenu(true);

回答by Sandy Akbar

please try this

请试试这个

@Override 
public void onPrepareOptionsMenu(Menu menu) {
    menu.clear();
}

and put this on your fragmen's onCreate()

并将其放在您的片段的 onCreate() 上

setHasOptionsMenu(true);

回答by Divyesh V.Murani

In Fragment Class

在片段类中

 @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setHasOptionsMenu(true);
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        super.onCreateOptionsMenu(menu, inflater);
        menu.clear();
    }

回答by Android27

I used the code below for hiding menu items in a fragment where I don't want to use it. Note: Please read comment

我使用下面的代码在我不想使用的片段中隐藏菜单项。注意：请阅读评论

@Override
public boolean onCreateOptionsMenu(Menu menu) {

    MenuInflater inflater = getMenuInflater();
    inflater.inflate(R.menu.main, menu);
    Fragment whichFragment=getVisibleFragment();//getVisible method return current visible fragment
    String shareVisible=whichFragment.getClass().toString();
    if(shareVisible.equals(AccFragment.class.toString())
            ||shareVisible.equals(SocFragment.class.toString())
            ||shareVisible.equals(DevFragment.class.toString())
            ){
        MenuItem item=menu.findItem(R.id.action_share);
        item.setVisible(false);
    }
    return super.onCreateOptionsMenu(menu);
}

回答by Wahib Ul Haq

There are many different versions of similar solutions but unfortunately, none of them worked for me. I am sharing what eventually was useful for me to hide the whole overflow menu with multiple menu items. Thought maybe it's useful for anyone.

有许多不同版本的类似解决方案，但不幸的是，没有一个对我有用。我正在分享最终对我有用的东西，以隐藏带有多个菜单项的整个溢出菜单。想也许它对任何人都有用。

I grouped my menus with an idand then referred that id

我用 将我的菜单分组id，然后引用id

@Override
public void onPrepareOptionsMenu(Menu menu) {
    menu.setGroupVisible(R.id.menu_overflow, false);
    super.onPrepareOptionsMenu(menu);
}

If you want to hide any individual menu item then you can use

如果要隐藏任何单个菜单项，则可以使用

menu.getItem(R.id.action_licenses).setVisible(false);

Important thing is that you should have setOptionsMenu(true)in onViewCreated()

重要的是你应该setOptionsMenu(true)在onViewCreated()

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    setHasOptionsMenu(true);

回答by Aziz

Call setHasOptionMenu(true)in onCreateView()

通话setHasOptionMenu(true)中onCreateView()

and Do not callsuper.onCreateOptionsMenu()in fragment's onCreateOptionMenu()instead call menu.clear()because this will override the existing menu with the activity's menu

并且不要super.onCreateOptionsMenu()在片段中调用onCreateOptionMenu()而是调用，menu.clear()因为这将使用活动的菜单覆盖现有菜单

This worked in my case.

这在我的情况下有效。

回答by Henk-Martijn

Or solve it in the same Fragment which created the menu, if you host the Actionbar on Activity level. This way you don't have to add it on every other Fragment where you don't want to show it:

或者在创建菜单的同一个 Fragment 中解决它，如果您在 Activity 级别托管 Actionbar。这样您就不必将它添加到您不想显示的所有其他 Fragment 上：

public override void OnDestroy()
{
    base.OnDestroy();
    HasOptionsMenu = false;
}

回答by Null Pointer Exception

Add these functions to your Fragment

将这些函数添加到您的 Fragment

  @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setHasOptionsMenu(true);
        }
        @Override
        public void onPrepareOptionsMenu(Menu menu) {
            MenuItem item=menu.findItem(R.id.delete);
            item.setVisible(false);
        }

回答by androidGeek

Firstly in your Activitythat has the toolbar, create a method that sets up the overflow menufor you:

首先在你Activity有工具栏的地方，创建一个overflow menu为你设置的方法：

public void setUpOptionMenu(Toolbar toolbar){
    this.setSupportActionBar(toolbar);
}

In your fragments onCreateView()method, get the reference of your current activity and call your activities setUpOptionMenu()method:

在您的片段onCreateView()方法中，获取您当前活动的引用并调用您的活动setUpOptionMenu()方法：

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
    ...
    ...
    public void ((YourActivityName)this.getActivity()).setUpOptionMenu(null);
    ...
    ...
}

Cheers!!!

干杯！！！