Converting an ArrayAdapter to CursorAdapter for use in a SearchView
That's strange SearchView.setSuggestionsAdapter
accepts CursorAdapter only.
You could create MatrixCursor and fill it with data from String array. I hope you have small data collection.
Then pass the cursor to CursorAdapter.
String[] columnNames = {"_id","text"}
MatrixCursor cursor = new MatrixCursor(columnNames);
String[] array = getResources().getStringArray(R.array.allStrings); //if strings are in resources
String[] temp = new String[2];
int id = 0;
for(String item : array){
temp[0] = Integer.toString(id++);
temp[1] = item;
cursor.addRow(temp);
}
String[] from = {"text"};
int[] to = {R.id.name_entry};
busStopCursorAdapter = new SimpleCursorAdapter(context, R.layout.listentry, cursor, from, to);
I was facing similar problem. You can use SearchView.setSuggestionsAdapter() which only accepts CursorAdapter. On the other hand... what's the point? If you use the standard <android.support.v7.widget.SearchView />
then it contains SearchAutoComplete which extends AppCompatAutoCompleteTextView inside. The following code worked for me:
List<String> items = Lists.newArrayList(new String[] {"aaaaa", "bbbbb", "ccccc", "ddddd"});
SearchView searchView = (SearchView) findViewById(R.id.autocomplete_searchview);
SearchView.SearchAutoComplete searchSrcTextView = (SearchView.SearchAutoComplete) findViewById(android.support.v7.appcompat.R.id.search_src_text);
searchSrcTextView.setThreshold(1);
searchSrcTextView.setAdapter(new SuggestionAdapter<String>(this, android.R.layout.simple_dropdown_item_1line, items));
searchSrcTextView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
return;
}
});
and the following Adapter code:
public class SuggestionAdapter<T> extends ArrayAdapter<T> {
private List<T> items;
private List<T> filteredItems;
private ArrayFilter mFilter;
public SuggestionAdapter(Context context, @LayoutRes int resource, @NonNull List<T> objects) {
super(context, resource, Lists.<T>newArrayList());
this.items = objects;
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public T getItem(int position) {
return items.get(position);
}
@Override
public Filter getFilter() {
if (mFilter == null) {
mFilter = new ArrayFilter();
}
return mFilter;
}
public int getCount() {
//todo: change to pattern-size
return items.size();
}
private class ArrayFilter extends Filter {
@Override
protected FilterResults performFiltering(CharSequence prefix) {
FilterResults results = new FilterResults();
//custom-filtering of results
results.values = items;
results.count = items.size();
return results;
}
@Override
protected void publishResults(CharSequence constraint, FilterResults results) {
filteredItems = (List<T>) results.values;
if (results.count > 0) {
notifyDataSetChanged();
} else {
notifyDataSetInvalidated();
}
}
}
}