我已经实现了搜索 View ，它可以过滤我的 ListView 项目。当我输入任何文本时，它会过滤列表，但当我退出搜索 View 时，它不会返回原始列表项。
public class PlacesListAdapter extends ArrayAdapter<Place> implements
Filterable {
public Context context;
private List<Place> places, orig, itemDetailsrrayList;
private PlaceFilter filter;
public PlacesListAdapter(Context context, int textViewResourceId) {
super(context, textViewResourceId);
}
public PlacesListAdapter(Context context, int resource, List<Place> places) {
super(context, resource, places);
this.context = context;
this.places = places;
itemDetailsrrayList = places;
orig = itemDetailsrrayList;
filter = new PlaceFilter();
// imageLoader = new ImageLoader(context.getApplicationContext());
}
public int getCount() {
return itemDetailsrrayList.size();
}
public Place getItem(int position) {
return itemDetailsrrayList.get(position);
}
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
ViewHolder holder;
// View view = convertView;
// Place p = places.get(position);
if (convertView == null) {
LayoutInflater viewInflater;
viewInflater = LayoutInflater.from(getContext());
convertView = viewInflater.inflate(R.layout.item_place, null);
holder = new ViewHolder();
holder.placeTitle = (TextView) convertView
.findViewById(R.id.place_title);
holder.placeDistance = (TextView) convertView
.findViewById(R.id.place_distance);
holder.placeCategoryIcon = (ImageView) convertView
.findViewById(R.id.place_category_icon);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.placeTitle.setText(itemDetailsrrayList.get(position)
.getPlaceTitle());
holder.placeDistance.setText("200");
holder.placeCategoryIcon.setImageResource(R.drawable.icon_category);
return convertView;
}
static class ViewHolder {
TextView placeId;
TextView placeTitle;
TextView placeDistance;
ImageView placeCategoryIcon;
}
@Override
public Filter getFilter() {
// TODO Auto-generated method stub
return filter;
}
private class PlaceFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults oReturn = new FilterResults();
ArrayList<Place> results = new ArrayList<Place>();
if (orig == null)
orig = itemDetailsrrayList;
if (constraint != null) {
if (orig != null && orig.size() > 0) {
for (Place g : orig) {
if (g.getPlaceTitle().toLowerCase()
.contains(constraint.toString().toLowerCase()))
results.add(g);
}
}
oReturn.values = results;
}
return oReturn;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
itemDetailsrrayList = (ArrayList<Place>) results.values;
notifyDataSetChanged();
}
}
}
MainActivity.java
public class MainActivity extends SherlockFragmentActivity implements
SearchView.OnQueryTextListener {
protected static CharSequence[] _categories = { "Amusement Park",
"Bird Sanctuary", "Wild Life", "River", "Hill Station", "Temple",
"Rafting", "Fishing", "Hiking", "Museums" };
protected static boolean[] _selections = new boolean[_categories.length];
private final String[] places = new String[] { "Mysore", "Bangalore",
"Mangalore", "Wayanad", "Bandipur National Park", "Chickmaglur",
"Bandipura", "Coorg", "Kodaikanal", "Hampi", "Ghati Subramanya",
"Mekedatu", "Muththathhi", "Shivasamudram", "Talakadu",
"Savana Durga" };
public SearchView mSearchView;
private TextView mStatusView;
private Menu mainMenu = null;
PlacesListAdapter adapter;
ListView listView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
setContentView(R.layout.activity_main);
Log.i("Nomad", "onCreate");
List<Place> thePlaces = new ArrayList<Place>();
for (int i = 0; i < places.length; i++) {
Place pl = new Place("NO_ID", places[i], "NO_DISTANCE",
"NO_CATEGORYICON");
thePlaces.add(pl);
}
listView = (ListView) findViewById(R.id.place_list);
adapter = new PlacesListAdapter(MainActivity.this, R.layout.item_place,
thePlaces);
listView.setAdapter(adapter);
listView.setTextFilterEnabled(true);
mSearchView = (SearchView) findViewById(R.id.action_search);
listView.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> a, View view, int position,
long id) {
Toast.makeText(MainActivity.this, "Test", Toast.LENGTH_SHORT);
startActivity(new Intent(MainActivity.this, PlaceActivity.class));
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
Log.i("Nomad", "onCreateOptionsMenu");
super.onCreateOptionsMenu(menu);
MenuInflater inflater = getSupportMenuInflater();
inflater.inflate(R.menu.activity_main, menu);
mainMenu = menu;
MenuItem searchItem = menu.findItem(R.id.action_search);
// Search View
mSearchView = (SearchView) searchItem.getActionView();
setupSearchView(searchItem);
mSearchView.setOnSearchClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// hide action item
if (mainMenu != null) {
mainMenu.findItem(R.id.action_category).setVisible(false);
mainMenu.findItem(R.id.action_sort).setVisible(false);
}
}
});
mSearchView.setOnCloseListener(new SearchView.OnCloseListener() {
@Override
public boolean onClose() {
// re-show the action button
if (mainMenu != null) {
mainMenu.findItem(R.id.action_category).setVisible(true);
mainMenu.findItem(R.id.action_sort).setVisible(true);
}
return false;
}
});
Log.i("Nomad", "after setupSearchView()");
return true;
}
public boolean onOptionsItemSelected(MenuItem item) {
switch (item.getItemId()) {
case R.id.action_search:
Toast.makeText(this, "Searh", Toast.LENGTH_LONG).show();
Log.i("Nomad", "Click Search");
break;
case R.id.action_category:
showDialog();
break;
case R.id.action_sort_alpha_az:
Toast.makeText(this, "Alpha AZ", Toast.LENGTH_LONG).show();
break;
case R.id.action_sort_alpha_za:
Toast.makeText(this, "Alpha ZA", Toast.LENGTH_LONG).show();
break;
case R.id.action_sort_dist_nf:
Toast.makeText(this, "Dist NF", Toast.LENGTH_LONG).show();
break;
case R.id.action_sort_dist_fn:
Toast.makeText(this, "Dist FN", Toast.LENGTH_LONG).show();
break;
default:
// return super.onOptionsItemSelected(item);
break;
}
return true;
}
private void setupSearchView(MenuItem searchItem) {
mSearchView.setIconifiedByDefault(true);
mSearchView.setOnQueryTextListener(this);
mSearchView.setSubmitButtonEnabled(false);
searchItem.setShowAsActionFlags(MenuItem.SHOW_AS_ACTION_ALWAYS);
// | MenuItem.SHOW_AS_ACTION_COLLAPSE_ACTION_VIEW
}
public boolean onQueryTextChange(String newText) {
Log.i("Nomad", "onQueryTextChange");
if (TextUtils.isEmpty(newText)) {
Log.i("Nomad", "onQueryTextChange Empty String");
listView.clearTextFilter();
} else {
Log.i("Nomad", "onQueryTextChange " + newText.toString());
adapter.getFilter().filter(newText.toString());
}
return true;
}
public boolean onQueryTextSubmit(String query) {
Log.i("Nomad", "onQueryTextSubmit");
return false;
}
public boolean onClose() {
Log.i("Nomad", "onClose");
return false;
}
protected boolean isAlwaysExpanded() {
return false;
}
}
最佳答案
你的两个 ArrayList 与适配器的对象指向同一个对象，因为这一行:
itemDetailsrrayList = places;
orig = itemDetailsrrayList;
orig 列表应保持完整，以便您在需要时可以返回原始数据:
orig = new ArrayList<String>(itemDetailsrrayList);
如果这不能解决问题，您可能需要显示一些与搜索 View 相关的代码。
关于android - SearchView过滤ListView，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/13821536/