未调用片段内的菜单

Question

@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    Log.d("Does", "get called");
    inflater.inflate(R.menu.menuitem, menu);
    super.onCreateOptionsMenu(menu, inflater);
}

@Override
public View onCreateView(LayoutInflater inflater, 
        ViewGroup container, Bundle savedInstanceState) {   
          setHasOptionsMenu(true);
          return inflater.inflate(R.layout.layout1, container, false);
}

更新：我尝试从fragment的onCreate方法调用此命令，但是菜单没有显示出来。

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

menu.xml

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

    <item android:id="@+id/section" android:title="@string/section"
        android:icon="@drawable/ic_section"
        android:showAsAction="always" />

    <item android:id="@+id/refresh" android:title="@string/refresh" 
        android:icon="@drawable/ic_refresh"
        android:showAsAction="always" />

    <item android:id="@+id/edit_patient" android:title="@string/edit_patient" 
        android:icon="@drawable/ic_editpatient"
        android:showAsAction="always" />    

    <item android:id="@+id/about" android:title="@string/about"
        android:showAsAction="never" />

    <item android:id="@+id/help" android:title="@string/help"
        android:showAsAction="never" />

    <item android:id="@+id/signout" android:title="@string/signout"
        android:showAsAction="never" />

</menu>

Answer 1

您需要从片段的一个起始生命周期方法中调用SethasOptionsMenu（true）；。最好是在oncreate（...）中。

在最低限度的情况下，片段的oncreate方法如下所示：

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

此外，在自定义菜单膨胀后调用super.oncreateOptionsMenu(menu,inflater）；会将刚刚膨胀的菜单重置为空菜单。

@Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    Log.d("Does", "get called");
    super.onCreateOptionsMenu(menu, inflater);
    inflater.inflate(R.menu.menuitem, menu);
}

@Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
    Log.d("Does", "get called");
    //no super call
    inflater.inflate(R.menu.menuitem, menu);
}