getting list of previously entered strings under the edit-text in android “just like a username field of some email/website”

Question

I want some directions. I have not much clear understanding about it. So please...

1. Here is my edit-text in xml form:

Answer 1

You are most of the way there. I recommend using an AutoCompleteTextView and simply binding your List to an ArrayAdapter. (An AutoCompleteTextView already has the dropdown feature to help the user select between similar entries and doesn't require a TextWatcher.)

Code from documentation:

 public class CountriesActivity extends Activity {
     protected void onCreate(Bundle icicle) {
         super.onCreate(icicle);
         setContentView(R.layout.countries);

         ArrayAdapter adapter = new ArrayAdapter(this,
                 android.R.layout.simple_dropdown_item_1line, COUNTRIES);
         AutoCompleteTextView textView = (AutoCompleteTextView)
                 findViewById(R.id.countries_list);
         textView.setAdapter(adapter);
     }

     private static final String[] COUNTRIES = new String[] {
         "Belgium", "France", "Italy", "Germany", "Spain"
     };
 }

(You can use your ArrayList in an identical manner to the primitive Array above.)