重复片段中的菜单和数据使用FragmentStatePagerAdapter后 [英] Duplicate Menu and Data in Fragments after using FragmentStatePagerAdapter
问题描述
我试图在这里各个岗位提供了这么多的答案,但没有为我工作。
问题 - 我有了6个片段,但单一的活动导航的抽屉里。一切正常,直到我在抽屉里改变排名第1片段。我想第一个片段内刷卡标签。所以我用 FragmentStatePagerAdapter
。
-
每个片段都有自己的菜单与MainActivity菜单。
@覆盖
公共无效的onCreate(捆绑savedInstanceState){
super.onCreate(savedInstanceState); //通知系统,使该片段的选项菜单。
setHasOptionsMenu(真);
}和膨胀是这样的:
@覆盖
公共无效onCreateOptionsMenu(菜单菜单,MenuInflater气筒){
inflater.inflate(R.menu.story,菜单);
} -
一切工作正常。但是,当我在抽屉式导航访问其他片段则显示的工具栏重复菜单。它创造了更多的副本,如果有留在当我访问其他片段的工具栏空间。
尝试1 :要解决这个问题,我最初使用的:
@覆盖
prepareOptionsMenu(菜单菜单)上公共无效{
menu.clear();
}@覆盖
公共无效onCreateOptionsMenu(菜单菜单,MenuInflater气筒){
super.onCreateOptionsMenu(菜单,充气器);
inflater.inflate(R.menu.story,菜单);
}
有了这个,我没有得到重复的菜单,但现在我没有看到 MainActivity菜单
。
2试试
@覆盖
公共无效onCreateOptionsMenu(菜单菜单,MenuInflater气筒){
。getActivity()invalidateOptionsMenu();
inflater.inflate(R.menu.story,菜单);
}
有了这个,我同时获得片段和活动菜单,但重复的存在。
这应该很容易解决,但我不捡的方式来处理这个问题。也许我不明白的生命周期呢?
我的另一种方法 - 实现所有菜单中的片段就可以了,但是这应该是我们最后的选择。
解决这个 - 既保持菜单上的所有我需要做的就是这个(很简单的解决方案):
menu.clear();
inflater.inflate(R.menu.story,菜单);
。getActivity()getMenuInflater()膨胀(R.menu.main,菜单);
问题2 OnOptionsItemSelected
从第一个片段的方法获取调用其他片段。
私人无效hideAllMenuItems(){
如果(actionBarMenu!= NULL){
actionBarMenu.findItem(R.id.action_item1).setVisible(假);
actionBarMenu.findItem(R.id.action_item2).setVisible(假);
}
}
私人无效showMenuIcon(){
如果(actionBarMenu!= NULL){
hideAllMenuItems();
如果(currentFragment的instanceof片段1)
actionBarMenu.findItem(R.id.action_item1).setVisible(真); 否则,如果(currentFragment的instanceof Fragment2)
actionBarMenu.findItem(R.id.action_item2).setVisible(真); }
}
通话shoeMenuIcon()每次有新的片段负荷..
希望你正在寻找这个
I tried so many answers provided by various posts here but nothing worked for me.
Problem- I have navigation drawer that has 6 fragments but single activity. Everything worked fine till I changed 1st ranked fragment in drawer. I wanted Swipe tabs inside first fragment. So I used FragmentStatePagerAdapter
.
Each fragment has its own menu along with MainActivity Menu.
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Notify the system to allow an options menu for this fragment. setHasOptionsMenu(true); }
And inflated like this:
@Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.story, menu); }
Everything works fine. But When I visit other fragments in navigation drawer then it shows duplicate menu in toolbar. It creates more duplicates if there is space left in toolbar when I visit other fragments.
Try 1 : To solve this problem I initially used:
@Override
public void onPrepareOptionsMenu(Menu menu) {
menu.clear();
}
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
super.onCreateOptionsMenu(menu, inflater);
inflater.inflate(R.menu.story, menu);
}
With this I don't get duplicate menu but now I don't see MainActivity menus
.
Try 2:
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
getActivity().invalidateOptionsMenu();
inflater.inflate(R.menu.story, menu);
}
With this I get both Fragment and Activity menu but Duplicates are there.
This should be easy to solve but I am not picking up a way to deal with this. Maybe I didn't understand the life cycle well?
My other approach- Implementing all menus in Fragments will do the trick but this should be our last option.
Solution to this - To maintain both Menu all I have to do is this (Very easy solution):
menu.clear();
inflater.inflate(R.menu.story, menu);
getActivity().getMenuInflater().inflate(R.menu.main, menu);
Problem 2 OnOptionsItemSelected
method from 1st fragment is getting called in other fragments.
private void hideAllMenuItems() {
if (actionBarMenu != null) {
actionBarMenu.findItem(R.id.action_item1).setVisible(false);
actionBarMenu.findItem(R.id.action_item2).setVisible(false);
}
}
private void showMenuIcon() {
if (actionBarMenu != null) {
hideAllMenuItems();
if (currentFragment instanceof Fragment1)
actionBarMenu.findItem(R.id.action_item1).setVisible(true);
else if (currentFragment instanceof Fragment2)
actionBarMenu.findItem(R.id.action_item2).setVisible(true);
}
}
call shoeMenuIcon() each time new fragment load..
Hope you are looking for this
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