onCreateOptionsMenu inside Fragments

2019-01-12 17:22发布

I have placed setHasOptionsMenu(true) inside onCreateView, but I still can't call onCreateOptionsMenu inside fragments.

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

Below is my onCreateOptionsMenu code.

@Override
public boolean onCreateOptionsMenu(com.actionbarsherlock.view.Menu menu) {
    getSupportMenuInflater().inflate(R.menu.layout, menu);
    return (super.onCreateOptionsMenu(menu));
}

The error message I get:

The method onCreateOptionsMenu(Menu) of type Fragment must override or implement a supertype method.

5条回答
forever°为你锁心
2楼-- · 2019-01-12 17:41

try this,

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

And in onCreate add this line to make the options appear in your Toolbar

setHasOptionsMenu(true);
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Rolldiameter
3楼-- · 2019-01-12 17:48
 @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.activity_add_customer, container, false);
        setHasOptionsMenu(true);
}

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    inflater.inflate(R.menu.menu_sample, menu);
    super.onCreateOptionsMenu(menu,inflater);
}
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放荡不羁爱自由
4楼-- · 2019-01-12 17:51

Your already have the autogenerated file res/menu/menu.xml defining action_settings.

In your MainActivity.java have the following methods:

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

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();
    switch (id) {
        case R.id.action_settings:
            // do stuff, like showing settings fragment
            return true;
    }

    return super.onOptionsItemSelected(item); // important line
}

In the onCreateView() method of your Fragment call:

setHasOptionsMenu(true); 

and also add these 2 methods:

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    inflater.inflate(R.menu.fragment_menu, menu);
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    int id = item.getItemId();
    switch (id) {
        case R.id.action_1:
            // do stuff
            return true;

        case R.id.action_2:
            // do more stuff
            return true;
    }

    return false;
}

Finally, add the new file res/menu/fragment_menu.xml defining action_1 and action_2.

This way when your app displays the Fragment, its menu will contain 3 entries:

  • action_1 from res/menu/fragment_menu.xml
  • action_2 from res/menu/fragment_menu.xml
  • action_settings from res/menu/menu.xml
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Viruses.
5楼-- · 2019-01-12 18:01

Call

setSupportActionBar(toolbar)

inside

onViewCreated(...) 

of Fragment

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);
    Toolbar toolbar = (Toolbar) view.findViewById(R.id.toolbar);
    ((MainActivity)getActivity()).setSupportActionBar(toolbar);
    setHasOptionsMenu(true);
}
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疯言疯语
6楼-- · 2019-01-12 18:02

I tried the @Alexander Farber and @Sino Raj answers. Both answers are nice, but I couldn't use the onCreateOptionsMenu inside my fragment, until I discover what was missing:

Add setSupportActionBar(toolbar) in my Activity, like this:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.id.activity_main);

    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
}

I hope this answer can be helpful for someone with the same problem.

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