AutoCompleteTextView in Android

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/LinearLayout1"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <AutoCompleteTextView
        android:id="@+id/autoCompleteTextView1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ems="10"
        android:hint="enter keyword" />

    <Button
        android:id="@+id/display"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="Display" />

</LinearLayout>

MainActivity.java

package in.blogspot.kantapp.autocompletetextviewinandroid;

import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity implements OnItemClickListener {
    String selectedname;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        AutoCompleteTextView auto = (AutoCompleteTextView) findViewById(R.id.autoCompleteTextView1);

        ArrayAdapter<String> adapter = new ArrayAdapter<String>(
                getApplicationContext(), R.layout.textview, COUNTRIES);

        auto.setAdapter(adapter);

        auto.setOnItemClickListener(this);

        // selectedname = auto.getText().toString();

        Button display = (Button) findViewById(R.id.display);

        display.setOnClickListener(new OnClickListener() {

            public void onClick(View arg0) {
                // TODO Auto-generated method stub
                Toast.makeText(getApplicationContext(),
                        "selected name :" + selectedname, 3000).show();

            }
        });

    }

    static final String[] COUNTRIES = new String[] { "Afghanistan", "Albania",
            "Algeria", "American Samoa", "Andorra", "Angola", "Anguilla",
            "Antarctica", "Antigua and Barbuda", "Argentina", "Armenia",
            "Aruba", "Australia", "Austria", "Azerbaijan", "Bahrain",
            "Bangladesh", "Barbados", "Belarus", "Belgium", "Belize", "Benin",
            "Bermuda", "Bhutan", "Bolivia", "Bosnia and Herzegovina",
            "Botswana", "Bouvet Island", "Brazil",
            "British Indian Ocean Territory", "British Virgin Islands",
            "Brunei", "Bulgaria", "Burkina Faso", "Burundi", "Cote d'Ivoire",
            "Cambodia", "Cameroon", "Canada", "Cape Verde", "Cayman Islands",
            "Central African Republic", "Chad", "Chile", "China",
            "Christmas Island", "Cocos (Keeling) Islands", "Colombia",
            "Comoros", "Congo", "Cook Islands", "Costa Rica", "Croatia",
            "Cuba", "Cyprus", "Czech Republic",
            "Democratic Republic of the Congo", "Denmark", "Djibouti",
            "Dominica", "Dominican Republic", "East Timor", "Ecuador", "Egypt",
            "El Salvador", "Equatorial Guinea", "Eritrea", "Estonia",
            "Ethiopia", "Faeroe Islands", "Falkland Islands", "Fiji",
            "Finland", "Former Yugoslav Republic of Macedonia", "France",
            "French Guiana", "French Polynesia", "French Southern Territories",
            "Gabon", "Georgia", "Germany", "Ghana", "Gibraltar", "Greece",
            "Greenland", "Grenada", "Guadeloupe", "Guam", "Guatemala",
            "Guinea", "Guinea-Bissau", "Guyana", "Haiti",
            "Heard Island and McDonald Islands", "Honduras", "Hong Kong",
            "Hungary", "Iceland", "India", "Indonesia", "Iran", "Iraq",
            "Ireland", "Israel", "Italy", "Jamaica", "Japan", "Jordan",
            "Kazakhstan", "Kenya", "Kiribati", "Kuwait", "Kyrgyzstan", "Laos",
            "Latvia", "Lebanon", "Lesotho", "Liberia", "Libya",
            "Liechtenstein", "Lithuania", "Luxembourg", "Macau", "Madagascar",
            "Malawi", "Malaysia", "Maldives", "Mali", "Malta",
            "Marshall Islands", "Martinique", "Mauritania", "Mauritius",
            "Mayotte", "Mexico", "Micronesia", "Moldova", "Monaco", "Mongolia",
            "Montserrat", "Morocco", "Mozambique", "Myanmar", "Namibia",
            "Nauru", "Nepal", "Netherlands", "Netherlands Antilles",
            "New Caledonia", "New Zealand", "Nicaragua", "Niger", "Nigeria",
            "Niue", "Norfolk Island", "North Korea", "Northern Marianas",
            "Norway", "Oman", "Pakistan", "Palau", "Panama",
            "Papua New Guinea", "Paraguay", "Peru", "Philippines",
            "Pitcairn Islands", "Poland", "Portugal", "Puerto Rico", "Qatar",
            "Reunion", "Romania", "Russia", "Rwanda", "Sqo Tome and Principe",
            "Saint Helena", "Saint Kitts and Nevis", "Saint Lucia",
            "Saint Pierre and Miquelon", "Saint Vincent and the Grenadines",
            "Samoa", "San Marino", "Saudi Arabia", "Senegal", "Seychelles",
            "Sierra Leone", "Singapore", "Slovakia", "Slovenia",
            "Solomon Islands", "Somalia", "South Africa",
            "South Georgia and the South Sandwich Islands", "South Korea",
            "Spain", "Sri Lanka", "Sudan", "Suriname",
            "Svalbard and Jan Mayen", "Swaziland", "Sweden", "Switzerland",
            "Syria", "Taiwan", "Tajikistan", "Tanzania", "Thailand",
            "The Bahamas", "The Gambia", "Togo", "Tokelau", "Tonga",
            "Trinidad and Tobago", "Tunisia", "Turkey", "Turkmenistan",
            "Turks and Caicos Islands", "Tuvalu", "Virgin Islands", "Uganda",
            "Ukraine", "United Arab Emirates", "United Kingdom",
            "United States", "United States Minor Outlying Islands", "Uruguay",
            "Uzbekistan", "Vanuatu", "Vatican City", "Venezuela", "Vietnam",
            "Wallis and Futuna", "Western Sahara", "Yemen", "Yugoslavia",
            "Zambia", "Zimbabwe" };

    public void onItemClick(AdapterView<?> adapterview, View arg1,
                            int position, long arg3) {
        // TODO Auto-generated method stub
        selectedname = (String) adapterview.getItemAtPosition(position);

    }
}

text.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="#000000"
    android:textStyle="italic"
    android:textSize="20dp">

</TextView>