AutoCompleteTextView and email domain Android

So there is an autocomplete text view field in my application. I want the user to enter his e-mail address. Now, in order to help him enter it faster and make no mistakes, I want to recommend the most common e-mail domain server to him

I am using this control with this array

String[] arraymails ={"@gmail.com","@hotmail.com","@yahoo.com","@outlook.com"};  

This is in oncreate

mEmailView = (AutoCompleteTextView) findViewById(R.id.register_email);
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,arraymails);  
mEmailView.setAdapter(adapter);

The idea is that when users type the "@" character and then "g", it will suggest @ gmail.com

If I type "@ G.." directly in the text box, but if I type anything before, such as "John @ GM", it will not work properly

Are there any wildcards, such as "* @gmail.com"? Or how should I implement it?

thank you

resolvent:

A few days later, I looked everywhere for a solution and couldn't find it. I posted it because it might help someone

Through trial and error and investigation of several websites and guides, I can find the solution I am looking for

This is an image of the solution:

Text box, you can enter anything you want, John is an example

Just enter "@" to get a list of all possible domain names

You can filter more by starting typing the domain name

code:

Customfilteradapter class

public class CustomFilterAdapter extends ArrayAdapter<String> {
    private final String MY_DEBUG_TAG = "CustomFilterAdapter";
    private ArrayList<String> items;
    private ArrayList<String> itemsAll;
    private ArrayList<String> suggestions;
    private int viewResourceId;

public CustomFilterAdapter(Context context, int viewResourceId, ArrayList<String> items) {
    super(context, viewResourceId, items);
    this.items = items;
    this.itemsAll = (ArrayList<String>) items.clone();
    this.suggestions = new ArrayList<String>();
    this.viewResourceId = viewResourceId;
}

public View getView(int position, View convertView, ViewGroup parent) {
    View v = convertView;
    if (v == null) {
        LayoutInflater vi = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        v = vi.inflate(viewResourceId, null);
    }
    String customer = items.get(position);
    if (customer != null) {
        TextView customerNameLabel = (TextView)v;
        if (customerNameLabel != null) {
            customerNameLabel.setText(customer);
        }
    }
    return v;
}

@Override
public Filter getFilter() {
    return nameFilter;
}

Filter nameFilter = new Filter() {
    public String convertResultToString(Object resultValue) {
        String str = (String)resultValue; 
        return str;
    }
    @Override
    protected FilterResults performFiltering(CharSequence constraint) {
        if (constraint != null){
        String palabra = constraint.toString();
        if(palabra != null && palabra.indexOf("@") != -1) {
            String palabra2 = palabra.substring(palabra.indexOf("@"));
            String antesArroba;
            try{
                antesArroba = palabra.substring(0, palabra.indexOf("@"));
            }catch (Exception ex)
            {
                antesArroba ="";
            }
            suggestions.clear();
            for (String customer : itemsAll) {
                if(customer.toLowerCase().startsWith(palabra2.toString().toLowerCase())){
                    suggestions.add(antesArroba+customer);
                }
            }
            FilterResults filterResults = new FilterResults();
            filterResults.values = suggestions;
            filterResults.count = suggestions.size();
            return filterResults;
        } else {
            return new FilterResults();
        }
        }else {
            return new FilterResults();
        }
    }

    @Override
    protected void publishResults(CharSequence constraint, FilterResults results) {
        ArrayList<String> filteredList = (ArrayList<String>) results.values;
        if(results != null && results.count > 0) {
            clear();
            for (String c : filteredList) {
                add(c);
            }
            notifyDataSetChanged();
        }
    }
};

}

Oncreate activity (you can add anything you want here)

arraymails = new ArrayList();
arraymails.add("@gmail.com");
arraymails.add("@hotmail.com");
arraymails.add("@yahoo.com");
arraymails.add("@outlook.com");
arraymails.add("@adinet.com.uy");

mEmailView = (AutoCompleteTextView) findViewById(R.id.register_email);
mEmailView.setText(mEmail);
CustomFilterAdapter adapter = new CustomFilterAdapter(this,android.R.layout.simple_list_item_1,arraymails); 

That's it.

Good luck!