我正在使用片段处理返回功能。我使用操作栏作为返回按钮,但是onOptionsItemSelected函数不起作用(甚至可能未调用该函数)
这段代码在我的FragmentActivity中:
@Override
public boolean onOptionsItemSelected(MenuItem item) {
int id = item.getItemId();
if (id == android.R.id.home) {
getActionBar().setHomeButtonEnabled(false);//disable the back button
this.getFragmentManager().popBackStack();
return true;
}
return super.onOptionsItemSelected(item);
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.bottom_tab);
FragmentTabHost tabHost = (FragmentTabHost)findViewById(R.id.bottom_tab_host);
tabHost.setup(this, getSupportFragmentManager(), R.id.bottom_tab_content);
//tabHost.addTab(tabHost.newTabSpec("explore").setIndicator("explore"), ListTabWidget.class, null);
tabHost.addTab(tabHost.newTabSpec("browse").setIndicator("browse"), SearchList.class, null);
}
这段代码在我的Fragment(A)中:
public class SearchList extends Fragment implements SearchView.OnQueryTextListener{
FragmentActivity searchActivity;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
searchActivity = (FragmentActivity) this.getActivity();
View searchView = inflater.inflate(R.layout.search_list, container, false);
SearchView searchBar = (SearchView)searchView.findViewById(R.id.browse_search);
searchBar.setIconifiedByDefault(false); //Showing text field in search
searchBar.setSubmitButtonEnabled(true);
searchBar.setOnQueryTextListener(this);
return searchView;
}
@Override
public boolean onQueryTextSubmit(String query) {
// TODO Auto-generated method stub
/*Intent intent = new Intent(Intent.ACTION_SEARCH, null, searchActivity, BrowseGrid.class);
intent.putExtra(SearchManager.QUERY, query);
startActivity(intent);*/
Bundle args = new Bundle();
args.putString("search_query", query);
BrowseGrid browseFragment = new BrowseGrid();
browseFragment.setArguments(args);
FragmentTransaction transaction = getActivity().getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.bottom_tab_content, browseFragment);
transaction.addToBackStack(null);
transaction.commit();
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
// TODO Auto-generated method stub
return false;
}
}
和片段(B):
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View view = inflater.inflate(R.layout.grid_list, container, false);
gridView = (GridView)view.findViewById(R.id.gridView);
getActivity().getActionBar().setDisplayHomeAsUpEnabled(true);
return view;
}
目的很简单。按下返回按钮,片段从B返回到A。
我想念什么吗?
最佳答案
当我发现堆栈实际上没有要弹出的东西(我想知道为什么...)时,我选择了另一种方法。
我不知道这是否是最好的解决方案,但似乎可行。
更换
getFragmentManager().popBackStack();
至
FragmentManager fm = getFragmentManager();
if (fm.getBackStackEntryCount()>0){
//Log.d("Bottom Tab", "popping backstack");
fm.popBackStack();
} else {
//Log.d("Bottom Tab", "nothing can pop");
super.onBackPressed();
}
即使堆栈没有任何内容,它也会覆盖onBackPressed()返回。
关于android - Android onOptionsItemSelected无法正常运行,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/23422583/