我怎样才能更改选项菜单中的不同片段？ [英] how can I change option menu in different fragments?

问题描述

我有一个菜单中选择一个片段：

I have a Fragment with menu:

public class FragmentA extends Fragment {

public FragmentA() {
   setHasOptionsMenu(true);
}

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

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

}

我想改变菜单，但它不工作，并保留旧的操作菜单

I would like to change menù but it doesn't work and keep the old action menu

片段B是等于像上面用不同的充气XML的菜单。

Fragment B is equals like above with different inflate xml menu.

public class FragmentB extends Fragment {

public FragmentB() {
   setHasOptionsMenu(true);
}

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

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

}

编辑：

可有效使用不同的菜单布局不同片段和1个菜单布局的主要活动和型动物ID

Can be useful to use different menu layout for different fragments and 1 menu layout for main activity and differents id

推荐答案

把 setHasOptionsMenu（真）的构造和充气段特定的菜单。

Put setHasOptionsMenu(true) in constructor and inflate fragment specific menu.

public class FragmentA extends Fragment {

    public FragmentA() {
       setHasOptionsMenu(true);
    }

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

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

在主活动菜单

public class MainActivity extends Activity {
    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
        inflater.inflate(R.menu.main_menu, menu);
        super.onCreateOptionsMenu(menu, inflater);
    }
}

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