为什么在片段中未调用android.R.id.home? [英] Why is my android.R.id.home not called in my fragment?
问题描述
我当前正在使用FragmentStatePagerAdapter,我希望它具有向上导航"功能(DisplayHomeAsUpEnabled).当我设置以下代码时,它将显示为正确的向后导航按钮.但是当我单击它时,什么也没有发生,你们能看到我做的任何事情,我的代码做错了什么,按下向上导航"按钮时我没有错误,并且我也没有编译器错误.
I'm currently using FragmentStatePagerAdapter and I would like it to have a "navigate up" feature (DisplayHomeAsUpEnabled). When I set the following code it shows up as a correct navigate back button. But nothing happens when I click on it, can you guys see anything that I', doing wrong in my code, I get no error while pressing the "navigate up" button and I get no compiler errors.
这是代码,它在公共布尔onOptionsItemSelected(MenuItem item){"中的底部变得很有趣.
Here is the code, its in the "public boolean onOptionsItemSelected(MenuItem item) {" it gets interesting at the bottom.
public class ShareholdingDetailFragment extends FragmentActivity {
final int NUM_ITEMS = Portfolio.getPortfolio().count();
MyAdapter mAdapter;
ViewPager mPager;
Bundle extras;
@Override
protected void onCreate(Bundle savedInstanceState) {
System.out.println(NUM_ITEMS + "e");
super.onCreate(savedInstanceState);
setContentView(R.layout.shareholdingdetailview_fragment_wrapper);
mAdapter = new MyAdapter(getSupportFragmentManager());
mPager = (ViewPager)findViewById(R.id.pager);
mPager.setAdapter(mAdapter);
}
public class MyAdapter extends FragmentStatePagerAdapter {
public MyAdapter(FragmentManager fm) {
super(fm);
}
public int getCount() {
return NUM_ITEMS;
}
public Fragment getItem(int position) {
return ShareholdingFragment.newInstance(position);
}
}
public static class ShareholdingFragment extends Fragment {
int mNum;
static ShareholdingFragment newInstance(int num) {
ShareholdingFragment f = new ShareholdingFragment();
// Supply num input as an argument.
Bundle args = new Bundle();
args.putInt("num", num);
f.setArguments(args);
return f;
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mNum = getArguments() != null ? getArguments().getInt("num") : 1;
}
@SuppressLint({ "NewApi", "NewApi" })
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.shareholdingdetailview_fragment, container, false);
/****************Setting the Display as home and it shows*******************/
ActionBar bar = getActivity().getActionBar();
bar.setDisplayHomeAsUpEnabled(true);
/**********************************/
return view;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case android.R.id.home://Not working
System.out.println("test");//This isn't printed out
Intent upIntent = new Intent(getActivity(), DetailShareHoldingActivity.class);
if (NavUtils.shouldUpRecreateTask(getActivity(), upIntent)) {
getActivity().finish();
} else {
NavUtils.navigateUpTo(getActivity(), upIntent);
}
return true;
}
return super.onOptionsItemSelected(item);
}
}
}
推荐答案
尝试添加:setHasOptionsMenu(true);在ShareholdingFragment中的onCreate()中.
Try adding: setHasOptionsMenu(true); in your onCreate() in ShareholdingFragment.
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