Custom Listview Adapter with filter Android
You can use the Filterable interface on your Adapter, have a look at the example below:
public class SearchableAdapter extends BaseAdapter implements Filterable {
private List<String>originalData = null;
private List<String>filteredData = null;
private LayoutInflater mInflater;
private ItemFilter mFilter = new ItemFilter();
public SearchableAdapter(Context context, List<String> data) {
this.filteredData = data ;
this.originalData = data ;
mInflater = LayoutInflater.from(context);
}
public int getCount() {
return filteredData.size();
}
public Object getItem(int position) {
return filteredData.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
// A ViewHolder keeps references to children views to avoid unnecessary calls
// to findViewById() on each row.
ViewHolder holder;
// When convertView is not null, we can reuse it directly, there is no need
// to reinflate it. We only inflate a new View when the convertView supplied
// by ListView is null.
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list_item, null);
// Creates a ViewHolder and store references to the two children views
// we want to bind data to.
holder = new ViewHolder();
holder.text = (TextView) convertView.findViewById(R.id.list_view);
// Bind the data efficiently with the holder.
convertView.setTag(holder);
} else {
// Get the ViewHolder back to get fast access to the TextView
// and the ImageView.
holder = (ViewHolder) convertView.getTag();
}
// If weren't re-ordering this you could rely on what you set last time
holder.text.setText(filteredData.get(position));
return convertView;
}
static class ViewHolder {
TextView text;
}
public Filter getFilter() {
return mFilter;
}
private class ItemFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
String filterString = constraint.toString().toLowerCase();
FilterResults results = new FilterResults();
final List<String> list = originalData;
int count = list.size();
final ArrayList<String> nlist = new ArrayList<String>(count);
String filterableString ;
for (int i = 0; i < count; i++) {
filterableString = list.get(i);
if (filterableString.toLowerCase().contains(filterString)) {
nlist.add(filterableString);
}
}
results.values = nlist;
results.count = nlist.size();
return results;
}
@SuppressWarnings("unchecked")
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
filteredData = (ArrayList<String>) results.values;
notifyDataSetChanged();
}
}
}
In your Activity or Fragment where of Adapter is instantiated :
editTxt.addTextChangedListener(new TextWatcher() {
@Override
public void onTextChanged(CharSequence s, int start, int before, int count) {
System.out.println("Text ["+s+"]");
mSearchableAdapter.getFilter().filter(s.toString());
}
@Override
public void beforeTextChanged(CharSequence s, int start, int count,
int after) {
}
@Override
public void afterTextChanged(Editable s) {
}
});
Here are the links for the original source and another example
In your CustomAdapter class implement filterable.
public class CustomAdapter extends BaseAdapter implements Filterable {
private List<ItemsModel> itemsModelsl;
private List<ItemsModel> itemsModelListFiltered;
private Context context;
public CustomAdapter(List<ItemsModel> itemsModelsl, Context context) {
this.itemsModelsl = itemsModelsl;
this.itemsModelListFiltered = itemsModelsl;
this.context = context;
}
@Override
public int getCount() {
return itemsModelListFiltered.size();
}
@Override
public Object getItem(int position) {
return itemsModelListFiltered.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
View view = getLayoutInflater().inflate(R.layout.row_items,null);
TextView names = view.findViewById(R.id.name);
TextView emails = view.findViewById(R.id.email);
ImageView imageView = view.findViewById(R.id.images);
names.setText(itemsModelListFiltered.get(position).getName());
emails.setText(itemsModelListFiltered.get(position).getEmail());
imageView.setImageResource(itemsModelListFiltered.get(position).getImages());
view.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Log.e("main activity","item clicked");
startActivity(new Intent(MainActivity.this,ItemsPreviewActivity.class).putExtra("items",itemsModelListFiltered.get(position)));
}
});
return view;
}
@Override
public Filter getFilter() {
Filter filter = new Filter() {
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults filterResults = new FilterResults();
if(constraint == null || constraint.length() == 0){
filterResults.count = itemsModelsl.size();
filterResults.values = itemsModelsl;
}else{
List<ItemsModel> resultsModel = new ArrayList<>();
String searchStr = constraint.toString().toLowerCase();
for(ItemsModel itemsModel:itemsModelsl){
if(itemsModel.getName().contains(searchStr) || itemsModel.getEmail().contains(searchStr)){
resultsModel.add(itemsModel);
}
filterResults.count = resultsModel.size();
filterResults.values = resultsModel;
}
}
return filterResults;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
itemsModelListFiltered = (List<ItemsModel>) results.values;
notifyDataSetChanged();
}
};
return filter;
}
}
}
You can get the whole tutorial here: ListView With Search/Filter and OnItemClickListener
Github Source Code
I hope it will be helpful for others.
// put below code (method) in Adapter class
public void filter(String charText) {
charText = charText.toLowerCase(Locale.getDefault());
myList.clear();
if (charText.length() == 0) {
myList.addAll(arraylist);
}
else
{
for (MyBean wp : arraylist) {
if (wp.getName().toLowerCase(Locale.getDefault()).contains(charText)) {
myList.add(wp);
}
}
}
notifyDataSetChanged();
}
declare below code in adapter class
private ArrayList<MyBean> myList; // for loading main list
private ArrayList<MyBean> arraylist=null; // for loading filter data
below code in adapter Constructor
this.arraylist = new ArrayList<MyBean>();
this.arraylist.addAll(myList);
and below code in your activity class
final EditText searchET = (EditText)findViewById(R.id.search_et);
// Capture Text in EditText
searchET.addTextChangedListener(new TextWatcher() {
@Override
public void afterTextChanged(Editable arg0) {
// TODO Auto-generated method stub
String text = searchET.getText().toString().toLowerCase(Locale.getDefault());
adapter.filter(text);
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1,
int arg2, int arg3) {
// TODO Auto-generated method stub
}
@Override
public void onTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
// TODO Auto-generated method stub
}
});
please check below code it will help you
DrawerActivity.userListview
.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
int pos = position;
Intent intent = new Intent(getContext(),
UserDetail.class);
intent.putExtra("model", list.get(position));
context.startActivity(intent);
}
});
return convertView;
}
@Override
public android.widget.Filter getFilter() {
return new android.widget.Filter() {
@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
ArrayList<UserListModel> updatelist = (ArrayList<UserListModel>) results.values;
UserListCustomAdaptor newadaptor = new UserListCustomAdaptor(
getContext(), getCount(), updatelist);
if (results.equals(constraint)) {
updatelist.add(modelobj);
}
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
@Override
protected FilterResults performFiltering(CharSequence constraint) {
FilterResults filterResults = new FilterResults();
list = new ArrayList<UserListModel>();
if (constraint != null && DrawerActivity.userlist != null) {
constraint = constraint.toString().toLowerCase();
int length = DrawerActivity.userlist.size();
int i = 0;
while (i < length) {
UserListModel modelobj = DrawerActivity.userlist.get(i);
String data = modelobj.getFirstName() + " "
+ modelobj.getLastName();
if (data.toLowerCase().contains(constraint.toString())) {
list.add(modelobj);
}
i++;
}
filterResults.values = list;
filterResults.count = list.size();
}
return filterResults;
}
};
}
@Override
public int getCount() {
return list.size();
}
@Override
public UserListModel getItem(int position) {
return list.get(position);
}