我正在开发一个应用程序，该应用程序的页面顶部有一个列表视图和一个编辑文本框。当您在编辑文本框中输入内容时，它将过滤列表视图中显示的项目。我遇到的问题是出现在滑块侧面的快速滚动图标。例如，当我键入字母“b”时，滚动条会消失。
我已经添加了这些行（以刷新我的列表滚动条），但它没有用。
_filterText = (EditText) findViewById(R.id.search_box);
_filterText.addTextChangedListener(new TextWatcher(){
public void afterTextChanged(Editable s) {
_listView.setFastScrollEnabled(false);
_listView.setFastScrollEnabled(true);
}
我也有这个主题并关注它，我想这不是同一个问题。 Android：fastScrollEnabled 一开始不工作
好的，这是我的全部课程：
public class StationsFragment extends GoogleAnalyticsFragment implements Observer{
private Boolean mDebug = true;
private ListView _listView;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
super.onCreateView( inflater, container, savedInstanceState );
activity = (FragmentsActivity) getActivity();
mStationsViewContainer = inflater.inflate(R.layout.stations_activity, null);
_listView = (ListView) mStationsViewContainer.findViewById( R.id.stations_listView );
activity.getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);
_stationsAdapter = new StationsAdapter();
_listView.setAdapter(_stationsAdapter);
_listView.setVerticalScrollBarEnabled(false);
_listView.setFastScrollEnabled(true);
_listView.setScrollingCacheEnabled(true);
registerForContextMenu(_listView);
_listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
}
});
_stationsList.addObserver(this);
_filterText = (EditText) mStationsViewContainer.findViewById( R.id.search_box );
TextWatcher filterTextWatcher = new TextWatcher() {
public void afterTextChanged(Editable s) {
_listView.setFastScrollEnabled(false);
_listView.setFastScrollEnabled(true);
}
public void beforeTextChanged(CharSequence s, int start, int count, int after) {
}
public void onTextChanged(CharSequence s, int start, int before, int count) {
_filterMode = _filterText.getText().length() > 0;
_stationsAdapter.getFilter().filter(s);
}
};
_filterText.addTextChangedListener(filterTextWatcher);
_stationsAdapter.getFilter().filter("");
}
return mStationsViewContainer;
}
class StationsAdapter extends BaseAdapter implements SectionIndexer, Filterable {
HashMap<String, Integer> _alphaIndexer;
public ArrayList<Station> _filtered = new ArrayList<Station>();
String[] _sections;
MyFilter _filter;
public StationsAdapter() {
super();
_filter = new MyFilter();
}
public void updateIndex() {
_alphaIndexer = new HashMap<String, Integer>();
for (int x = 0; x < _filtered.size(); x++) {
Station s = (Station) _filtered.get(x);
// get the first letter of the store
String ch = s.getTitle().substring(0, 1);
// convert to uppercase otherwise lowercase a -z will be sorted
// after upper A-Z
ch = ch.toUpperCase();
if (!_alphaIndexer.containsKey(ch)) {
if (_filterMode) {
_alphaIndexer.put(ch, x);
} else {
_alphaIndexer.put(ch, x + _favouriteManager.getFavourites().length);
}
}
}
Set<String> sectionLetters = _alphaIndexer.keySet();
ArrayList<String> sectionList = new ArrayList<String>(sectionLetters);
Collections.sort(sectionList);
if (!_filterMode && _favouriteManager.getFavourites().length > 0) {
sectionList.add(0, "\u2605");
}
_sections = new String[sectionList.size()];
sectionList.toArray(_sections);
if (!_filterMode && _favouriteManager.getFavourites().length > 0) {
_alphaIndexer.put("\u2605", 0);
}
}
public int getCount() {
if (_filterMode) {
if (mDebug) Log.i("StationFragment","filter size ="+_filtered.size());
return _filtered.size();
} else {
return _filtered.size() + _favouriteManager.getFavourites().length;
}
}
public Object getItem(int position) {
if (_filterMode) {
return _filtered.get(position);
} else {
if (position < _favouriteManager.getFavourites().length) {
return _favouriteManager.getFavourites()[position];
} else {
return _filtered.get(position - _favouriteManager.getFavourites().length);
}
}
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
if (mDebug) Log.i("ks3","getView called, position is " + position);
if (convertView == null) {
LayoutInflater inflater = (LayoutInflater) activity.getApplicationContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.stations_cell_custom, null);
}
if (!_filterMode) {
if (position < _favouriteManager.getFavourites().length) {
Favourite favourite = _favouriteManager.getFavourites()[position];
Station station = _stationsList.findStationById(favourite.getFavouriteId());
TextView details = ((TextView) convertView.findViewById(R.id.details));
if (_pushedFromRoutes || _pushedFromWidgetConfiguration) {
details.setVisibility(View.GONE);
} else {
details.setVisibility(View.VISIBLE);
}
TextView name = ((TextView) convertView.findViewById(R.id.name));
if (station != null) {
name.setText(station.getName());
//name.setTextColor(getResources().getColor(R.color.stations_list_favourite_text_color));
} else {
name.setText("");
}
details.setText(favourite.getUserSettings().formattedDateTime());
TextView header = ((TextView) convertView.findViewById(R.id.header_textview));
View headerBar = ((View) convertView.findViewById(R.id.header_bar));
if (position == 0) {
header.setVisibility(View.VISIBLE);
headerBar.setVisibility(View.VISIBLE);
header.setText(getString(R.string.star_favourites));
} else {
header.setVisibility(View.GONE);
headerBar.setVisibility(View.GONE);
header.setText(null);
}
} else {
Station station = _filtered.get(position - _favouriteManager.getFavourites().length);
TextView name = ((TextView) convertView.findViewById(R.id.name));
name.setText(station.getName());
name.setTextColor(getResources().getColor(R.color.stations_list_text_color));
((TextView) convertView.findViewById(R.id.details)).setVisibility(View.GONE);
TextView header = ((TextView) convertView.findViewById(R.id.header_textview));
View headerBar = ((View) convertView.findViewById(R.id.header_bar));
String firstLetter = station.getTitle().substring(0, 1);
/*if (position == _alphaIndexer.get(firstLetter)) {
TextView header = (TextView) activity.findViewById(R.id.header_textview);
header.setText(firstLetter);
}*/
if (position == _alphaIndexer.get(firstLetter)) {
header.setVisibility(View.VISIBLE);
headerBar.setVisibility(View.VISIBLE);
header.setText(firstLetter);
} else {
header.setVisibility(View.GONE);
headerBar.setVisibility(View.GONE);
header.setText(null);
}
}
} else {
Station station = _filtered.get(position);
TextView name = ((TextView) convertView.findViewById(R.id.name));
name.setText(station.getName());
name.setTextColor(getResources().getColor(R.color.stations_list_text_color));
((TextView) convertView.findViewById(R.id.details)).setVisibility(View.GONE);
TextView header = ((TextView) convertView.findViewById(R.id.header_textview));
View headerBar = ((View) convertView.findViewById(R.id.header_bar));
String firstLetter = station.getTitle().substring(0, 1);
if (position == _alphaIndexer.get(firstLetter)) {
header.setVisibility(View.VISIBLE);
headerBar.setVisibility(View.VISIBLE);
header.setText(firstLetter);
} else {
header.setVisibility(View.GONE);
headerBar.setVisibility(View.GONE);
header.setText(null);
}
}
return convertView;
}
public int getPositionForSection(int section) {
return _alphaIndexer.get(_sections[section]);
}
public int getSectionForPosition(int position) {
return 0;
}
public Object[] getSections() {
return _sections;
}
@Override
public Filter getFilter() {
return _filter;
}
class MyFilter extends Filter {
@Override
public CharSequence convertResultToString(Object resultValue) {
if (resultValue != null) {
Station station = (Station) resultValue;
if (station != null) {
return station.getTitle();
}
}
return null;
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
String pattern = constraint.toString().toLowerCase();
FilterResults result = new FilterResults();
ArrayList<Station> filt = new ArrayList<Station>();
if (_pushedFromRoutes || _pushedFromWidgetConfiguration) {
synchronized (_stationsList.stations()) {
for (int i = 0, l = _stationsList.stations().length; i < l; i++) {
Station s = _stationsList.stations()[i];
if (pattern == null || pattern.length() == 0 || s.match(pattern))
filt.add(s);
}
result.count = filt.size();
result.values = filt;
}
} else {
synchronized (_stationsList.belgianStations()) {
for (int i = 0, l = _stationsList.belgianStations().length; i < l; i++) {
Station s = _stationsList.belgianStations()[i];
if (pattern == null || pattern.length() == 0 || s.match(pattern))
filt.add(s);
}
result.count = filt.size();
result.values = filt;
}
}
return result;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
_filtered = (ArrayList<Station>) results.values;
updateIndex();
_listView.setFastScrollEnabled(false);
notifyDataSetChanged();
_listView.setFastScrollEnabled(true);
if (mDebug) Log.i("StationFragment","list count ="+_listView.getCount());
if (_filterMode && _filtered.size() == 0) {
_listView.setVisibility(View.GONE);
_noResultsTextView.setVisibility(View.VISIBLE);
} else {
_listView.setVisibility(View.VISIBLE);
_noResultsTextView.setVisibility(View.GONE);
}
}
}
}
}
您看到我必须生成一个复杂的列表，我认为问题可能来自于此，也许滚动条可以获得最大值和最小值？我真的不明白？
我在一个活动中尝试了我的代码（我认为问题可能来自片段），当我测试它时，它仍然无法在我的平板电脑三星 Galaxy 中工作。我在 Nexus S 中尝试过，它奏效了。我必须在片段中使用此代码的问题，它必须在平板电脑中工作，尤其是 GalaxyTab。