AutoCompleteTextView with SimpleAdapter

While I was messing with AutoCompleteTextView, I wanted to specify my own Adapter for it.
I have created a custom adapter which extends SimpleAdapter and implements Filterable for filtering capabilities.

There were no problems till showing the filtered results to the user. I could not be able display the filtered results on the UI as a drop down list attached to the auto complete text. Then I needed to decompile the source code of AutoCompleteTextView.class and learnt how it works.

Here is my example;


public class CountrySimpleAdapter extends SimpleAdapter implements Filterable {

private ArrayList‹HashMap‹String, String›› mAllData, mDataShown;

public CountrySimpleAdapter(Context context, List data, int resource,
String[] from, int[] to) {
super(context, data, resource, from, to);
mDataShown = (ArrayList‹HashMap‹String, String››) data;
mAllData = (ArrayList‹HashMap‹String, String››) mDataShown.clone();
}

@Override
public Filter getFilter() {
Filter nameFilter = new Filter(){

@Override
public String convertResultToString(Object resultValue) {
return ((HashMap‹String, String›)(resultValue)).get(Country.NAME);
}

@Override
protected FilterResults performFiltering(CharSequence constraint) {
if(constraint != null)
{
ArrayList‹HashMap‹String, String›› tmpAllData = mAllData;
ArrayList‹HashMap‹String, String›› tmpDataShown = mDataShown;
tmpDataShown.clear();
for(int i = 0; i ‹ tmpAllData.size(); i++)
{
if(tmpAllData.get(i).get(Country.NAME).toLowerCase().startsWith(constraint.toString().toLowerCase()))
{
tmpDataShown.add(tmpAllData.get(i));
}
}

FilterResults filterResults = new FilterResults();
filterResults.values = tmpDataShown;
filterResults.count = tmpDataShown.size();
return filterResults;
}
else
{
return new FilterResults();
}
}

@Override
protected void publishResults(CharSequence constraint,
FilterResults results) {
if(results != null && results.count › 0)
{
notifyDataSetChanged();
}
}};

return nameFilter;
}
}


I hope that there is going to be a better way to achieve this task in the upcoming SDKs.

Comments

Anonymous said…
test

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