Android SearchView empty string
I'm trying to use a SearchView and I got everything to work, except when I want to search an empty string.
The onQueryTextChange does react when I remove the last character, but I want the user to be able to press the search button when the searchfield is empty.
final SearchView.OnQueryTextListener queryTextListener = new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextChange(String newText) {
// Do something
return true;
}
@Override
public boolean onQueryTextSubmit(String query) {
// Do something
return true;
}
};
searchView.setOnQueryTextListener(queryTextListener);
I've also tried using a OnKeyListner. but it does not seem to work either.
searchView.setOnKeyListener(new OnKeyListener() {
@Override
public boolean onKey(View arg0, int arg1, KeyEvent arg2) {
//Do something
return true;
}
});
This seems such a simple thing to do, but I can't get it to work. Any suggestions?
Edit
I have looked for a solution for a while now and just some minutes after posting this, I found a solution.
On this thread I found out this was not a bug, but it actually was deliberate.
Android SearchView.OnQueryTextListener OnQueryTextSubmit not fired on empty query string
So I just downloaded ActionBarSherlock and made some modification to the method onSubmitQuery()
From
private void onSubmitQuery() {
CharSequence query = mQueryTextView.getText();
if (query != null && TextUtils.getTrimmedLength(query) > 0) {
if (mOnQueryChangeListener == null
|| !mOnQueryChangeListener.onQueryTextSubmit(query.toString())) {
if (mSearchable != null) {
launchQuerySearch(KeyEvent.KEYCODE_UNKNOWN, null, query.toString());
setImeVisibility(false);
}
dismissSuggestions();
}
}
}
And the modified version
private void onSubmitQuery() {
CharSequence query = mQueryTextView.getText();
if(query == null) {query = "";}
if (mOnQueryChangeListener == null
|| !mOnQueryChangeListener.onQueryTextSubmit(query.toString())) {
if (mSearchable != null) {
launchQuerySearch(KeyEvent.KEYCODE_UNKNOWN, null, query.toString());
setImeVisibility(false);
}
dismissSuggestions();
}
}
Hope this helps if anyone else is having this problem.
Perhaps it's not suited for your app but you also have the option to use a simple EditText , then add a TextWatcher listener. This way you catch every input even if the user enters an empty string.
我有与SearchView相同的问题，但我不想使用ActionBarSherlock，所以我想出了解决方案，它包括样式自己的SearchView，如指南http://novoda.com/blog/styling-the-actionbar-searchview/和为EditText设置OnEditorActionListener（如何在用户点击时触发一个动作？），它是SearchView的一部分。
final SearchView searchView = (SearchView)findViewById(R.id.search);
int searchPlateId = searchView.getContext().getResources().getIdentifier("android:id/search_src_text", null, null);
EditText searchPlate = (EditText) searchView.findViewById(searchPlateId);
searchPlate.setOnEditorActionListener(new TextView.OnEditorActionListener() {
@Override
public boolean onEditorAction(TextView v, int actionId, KeyEvent event) {
if (actionId == EditorInfo.IME_ACTION_SEARCH) {
//Do something
}
return false;
});