我正在尝试在ArrayList中进行自动搜索，并在我的Activity中的ListView中显示它。所以我设法在适配器中生成过滤器，但是当我输入错误时我的过滤器有问题，按下后退按钮它不会继续搜索。
另外，有没有办法让searchView消失？我想从列表视图中选择一个项目后就消失了。
这是我处理SearchView的活动的一部分：
@Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.menu_search_team, menu);
SearchManager searchManager = (SearchManager)
getSystemService(Context.SEARCH_SERVICE);
MenuItem searchMenuItem = menu.findItem(R.id.search);
SearchView searchView = (SearchView) searchMenuItem.getActionView();
searchView.setSearchableInfo(searchManager.
getSearchableInfo(getComponentName()));
searchView.setSubmitButtonEnabled(true);
searchView.setOnQueryTextListener(this);
return true;
}
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
initAdapter(newText);
return true;
}
public void initAdapter(String text) {
adapter_search = new FriendListAdapter(this,listUsers);
listview.setVisibility(View.VISIBLE);
listview.bringToFront();
listview.setAdapter(adapter_search);
adapter_search.filter(text);
}
这是我的适配器：
public class FriendListAdapter extends BaseAdapter {
// Declare Variables
Context mContext;
LayoutInflater inflater;
private List<UserProject> worldpopulationlist = null;
private ArrayList<UserProject> arraylist;
public FriendListAdapter(Context context, List<UserProject> worldpopulationlist) {
mContext = context;
this.worldpopulationlist = worldpopulationlist;
inflater = LayoutInflater.from(mContext);
this.arraylist = new ArrayList<UserProject>();
this.arraylist.addAll(worldpopulationlist);
}
public class ViewHolder {
TextView rank, company;
CircleImageView picture;
CheckBox check;
}
@Override
public int getCount() {
return worldpopulationlist.size();
}
@Override
public UserProject getItem(int position) {
return worldpopulationlist.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
public View getView(final int position, View view, ViewGroup parent) {
final ViewHolder holder;
if (view == null) {
holder = new ViewHolder();
view = inflater.inflate(R.layout.adapter_teams, null);
// Locate the TextViews in listview_item.xml
holder.rank = (TextView) view.findViewById(R.id.name);
holder.company = (TextView) view.findViewById(R.id.description);
holder.picture = (CircleImageView) view.findViewById(R.id.profile_image);
holder.check = (CheckBox) view.findViewById(R.id.check);
view.setTag(holder);
} else {
holder = (ViewHolder) view.getTag();
}
// Set the results into TextViews
holder.check.setVisibility(View.INVISIBLE);
holder.rank.setText(worldpopulationlist.get(position).getName());
if (worldpopulationlist.get(position).getImageURL() != null) {
Picasso.with(mContext).load(worldpopulationlist.get(position).getImageURL()).into(holder.picture);
}
// Listen for ListView Item Click
view.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// Send single item click data to SingleItemView Class
Intent intent = new Intent(mContext, ActivityTeams.class);
if (ActivityTeams.user_type == 1) {
ActivityTeams.newList.add(worldpopulationlist.get(position));
} else if (ActivityTeams.user_type == 2) {
ActivityTeams.listOwners.add(worldpopulationlist.get(position));
}
// Pass all data rank
//intent.putExtra("rank",(worldpopulationlist.get(position).getName()));
// Pass all data flag
// Start SingleItemView Class
mContext.startActivity(intent);
System.out.println(worldpopulationlist.get(position).getName());
worldpopulationlist.clear();
ActivityTeams.listview.setVisibility(View.GONE);
}
});
return view;
}
// Filter Class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
worldpopulationlist.clear();
if (charText.length() == 0) {
worldpopulationlist.addAll(arraylist);
}
else
{
for (UserProject wp : arraylist)
{
if (wp.getName().toLowerCase(Locale.getDefault()).contains(charText))
{
worldpopulationlist.add(wp);
}
}
}
notifyDataSetChanged();
}
}
答案 0 :(得分：1)
适配器：添加一个新列表来存储完整的项目
public class ExampleAdapter extends RecyclerView.Adapter<ExampleAdapter.ExampleViewHolder> implements Filterable {
private List<ExampleItem> exampleList;
private List<ExampleItem> exampleListFull;
class ExampleViewHolder extends RecyclerView.ViewHolder {
ImageView imageView;
TextView textView1;
TextView textView2;
ExampleViewHolder(View itemView) {
super(itemView);
imageView = itemView.findViewById(R.id.image_view);
textView1 = itemView.findViewById(R.id.text_view1);
textView2 = itemView.findViewById(R.id.text_view2);
}
}
ExampleAdapter(List<ExampleItem> exampleList) {
this.exampleList = exampleList;
exampleListFull = new ArrayList<>(exampleList);
}
确保添加此 exampleListFull = new ArrayList<>(exampleList); 这样完整列表将与主列表分开处理。
现在将过滤器添加到您的适配器：
@Override
public Filter getFilter() {
return exampleFilter;
}
private Filter exampleFilter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
List<ExampleItem> filteredList = new ArrayList<>();
if (constraint == null || constraint.length() == 0) {
filteredList.addAll(exampleListFull);
} else {
String filterPattern = constraint.toString().toLowerCase().trim();
for (ExampleItem item : exampleListFull) {
if (item.getText2().toLowerCase().contains(filterPattern)) {
filteredList.add(item);
}
}
}
FilterResults results = new FilterResults();
results.values = filteredList;
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
exampleList.clear();
exampleList.addAll((List) results.values);
notifyDataSetChanged();
}
};
在您的活动中，只需将文本侦听器设置到您的搜索框并调用适配器过滤器 onQueryTextChange：
searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
@Override
public boolean onQueryTextSubmit(String query) {
return false;
}
@Override
public boolean onQueryTextChange(String newText) {
adapter.getFilter().filter(newText);
return false;
}
});
return true;
就是这样！ :)
答案 1 :(得分：0)
Here,
ArrayList<ChannelData> channelData = new ArrayList<>();
ArrayList<ChannelData> filtered_channelData = new ArrayList<>();
edt_search_channel.addTextChangedListener(new TextWatcher() {
@Override
public void beforeTextChanged(CharSequence charSequence, int i, int i1, int i2) {
}
@Override
public void onTextChanged(CharSequence charSequence, int start, int before, int count) {
if (filtered_channelData != null) {
filtered_channelData.clear();
Log.d("mytag", "list is clear" + filtered_channelData.size());
}
for (int i = 0; i < channelData.size(); i++) {
if (channelData.get(i).getName().toLowerCase().trim()
.contains(edt_search_channel.getText().toString().toLowerCase().trim())) {
filtered_channelData.add(channelData.get(i));
HashSet hs = new HashSet();
hs.addAll(filtered_channelData);
filtered_channelData.clear();
filtered_channelData.addAll(hs);
}
}
channelAdapter = new ChannelAdapter(context, filtered_channelData, dialogChannel);
rv_channel.setAdapter(channelAdapter);
Log.d("mytag", "filtered_skill_listing size in out of for loop" + filtered_channelData.size());
channelAdapter.notifyDataSetChanged();
}
@Override
public void afterTextChanged(Editable editable) {
if (edt_search_channel.getText().toString().equals("")) {
channelAdapter = new ChannelAdapter(context, channelData, dialogChannel);
rv_channel.setAdapter(channelAdapter);
channelAdapter.notifyDataSetChanged();
}
}
});