Java 如何更改不同片段中的选项菜单？
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How can I change option menu in different fragments?
提问by alfo888_ibg
I have a Fragment with menu:
我有一个带菜单的片段：
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);
}
}
I would like to change menu but it doesn't work and keep the old action menu
我想更改菜单但它不起作用并保留旧的操作菜单
Fragment B is equals like above with different inflate XML menu.
片段 B 与上面的相同，具有不同的膨胀 XML 菜单。
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);
}
}
EDITED:
编辑：
Can be useful to use different menu layout for different fragments and 1 menu layout for main activity and differents id
对于不同的片段使用不同的菜单布局和主要活动和不同的 id 的 1 个菜单布局可能很有用
采纳答案by Boban S.
Put setHasOptionsMenu(true)in constructor and inflate fragment specific menu.
放入setHasOptionsMenu(true)构造函数并膨胀片段特定菜单。
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);
}
}
menu in main activity
主要活动中的菜单
public class MainActivity extends Activity {
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.main_menu, menu);
super.onCreateOptionsMenu(menu, inflater);
}
}
回答by Gene Bo
Can all be done via Fragment - no need to inflate menu from activity:
都可以通过 Fragment 完成 - 无需从活动中扩充菜单：
public class UpdateFragment extends Fragment {
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// ...
setHasOptionsMenu(true);
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.update_menu, menu);
super.onCreateOptionsMenu(menu, inflater);
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
switch (id){
case R.id.navUpdateProfile:
showToast("navUpdateProfile");
return true;
default:
return super.onOptionsItemSelected(item);
}
}
}
