AutoCompleteTextView in android

yes, AutocompleteTextview is a view component which is not available in our Palette controls. directly we have to write in our layout .xml file. inside Relatielayout of activity_main.xml

 <AutoCompleteTextView
        android:id="@+id/AutoCompleteView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">
         android:completionThreshold="3"
 </AutoCompleteTextView>

here we given threshold at design time itself,  or runtime also set this threshold value.

 AutoCompleteTextview : is an EditText with autocomplete funcationality.  this is achived using Adapter.adapter acts a bridge between edittext and underlaying data/values. adapter is responsible for view each item in that dataset.

1st way i utilized predefined   android.R.layout.simple_list_item_1  Style for showing items in Autocompletetextview.

2nd way i designed one layout file as Root element is TextView---mystyle.xml

<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
     android:textColor="#f00"--------->red color so that values(india,indonisa) showing in red color.
    android:textSize="16sp"
    android:padding="12dp" >
</TextView>

Externalizing values :    it defines a file with resources as an string-array named as countries.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
      <string-array name="country">
        <item>India</item>
        <item>Indonesia</item>
        <item>Iran</item>
        <item>Iraq</item>
        <item>Ireland</item>
        <item>Poland</item>
        <item>Pakistan</item>
        <item>Peru</item>      
    </string-array>
</resources>