UI Android

package app.test;
import android.app.Activity;
import android.os.Bundle;
import android.widget.ArrayAdapter;
import android.widget.AutoCompleteTextView;
public class Test extends Activity {
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    setTitle("AutoCompleteTextViewActivity");
    ArrayAdapter adapter = new ArrayAdapter(this,
        android.R.layout.simple_dropdown_item_1line, COUNTRIES);
    AutoCompleteTextView textView = (AutoCompleteTextView) findViewById(R.id.auto_complete);
    textView.setAdapter(adapter);
  }
  static final String[] COUNTRIES = new String[] { "China", "Russia",
      "Germany", "Ukraine", "Belarus", "USA", "China1", "China12",
      "Germany", "Russia2", "Belarus", "USA" };
}
//main.xml

    android:orientation="vertical"
    android:layout_width="fill_parent" 
    android:layout_height="wrap_content">
               android:layout_width="fill_parent"
            android:layout_height="wrap_content"/>