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[英]how to get from a fragment to an activity without disturbing fragment's reausability
[英]Get Fragment's SearchView's state from activity
我有一個包含片段的活動,然后在片段中有包含SearchView的工具欄。 我想覆蓋活動的onBackPressed()以關閉searchView的焦點。 但是我沒有找到如何獲取片段菜單的狀態。 這是代碼:
MainActivity.java
@Override
public void onBackPressed() {
if (currentFragment instanceof FragmentListProduct) {
DrawerLayout drawerLayout = (DrawerLayout) currentFragment.getView().findViewById(R.id.drawer_layout);
if (drawerLayout.isDrawerOpen(GravityCompat.START)) {
drawerLayout.closeDrawer(GravityCompat.START);
} /*if currentFragment.searchViewIsNotClosed {
closeSearchView();
} */ else if (backstackFragment.size() > 0) {
replaceFragment(null, backstackFragment.pop());
} else {
super.onBackPressed();
}
} else {
super.onBackPressed();
}
}
FragmentListProduct.java
@Override
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
inflater.inflate(R.menu.menu_main, menu);
MenuItem searchItem = menu.findItem(R.id.app_bar_search);
final SearchView searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {...});
super.onCreateOptionsMenu(menu, inflater);
}
那么如何在活動中獲取片段的菜單,以便我可以訪問其狀態?
您可以通過片段通過onCreateOptionsMenu()公開視圖,並使用isIconified()檢查狀態,並使用setIconified(true)將其關閉。
FragmentListProduct.java
private SearchView searchView;
public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
//...
searchView = (SearchView) MenuItemCompat.getActionView(searchItem);
//...
}
public SearchView getSearchView() {
return searchView;
}
MainActivity.java
public void onBackPressed() {
//...
SearchView searchView = ((FragmentListProduct)currentFragment).getSearchView();
if (searchView != null) {
if (searchView.isIconified()) {
// the search is extended
searchView.setIconified(true);
} else {
// the search view is closed
}
}
/...
}
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