Android : Custom Auto suggestion edittext class with adapter in android

custom auto suggestion edittext class with adepter no need to call the adepter.

public class NationalityEditTextAutoComplete extends AutoCompleteTextView {

public NationalityEditTextAutoComplete(Context context) {
    super(context);

}

public NationalityEditTextAutoComplete(Context context, AttributeSet attrs,
        int defStyle) {
    super(context, attrs, defStyle);
    setAdapter();
}

public NationalityEditTextAutoComplete(Context context, AttributeSet attrs) {
    super(context, attrs);
    setAdapter();
}

private void setAdapter() {
    String[] countries = KeyValueDeafult.countries;

    ArrayAdapter<String> adapter = new ArrayAdapter<String>(
            this.getContext(), android.R.layout.simple_list_item_1,
            countries);
    this.setAdapter(adapter);
}

}