Programming are endless.

import android.app.Activity;
import android.app.AlertDialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

public class MainActivity extends Activity {
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		
		final CharSequence[] color = {"Red", "Orange", "Yellow", "Green", "Blue", "Navy", "Purple"};
		
		Button dialogBtn = (Button) findViewById(R.id.dialog);
		
		
		dialogBtn.setOnClickListener(new View.OnClickListener() {

			public void onClick(View v) {
				AlertDialog.Builder alertDialog = new AlertDialog.Builder(
						MainActivity.this);
				alertDialog.setPositiveButton("OK",
						new DialogInterface.OnClickListener() {

							public void onClick(DialogInterface dialog,
									int which) {
								Log.i(getResources().getString(
										R.string.app_name), "OK");
							}
						});
				alertDialog.setNegativeButton("CANCEL",
						new DialogInterface.OnClickListener() {

							public void onClick(DialogInterface dialog,
									int which) {
								Log.i(getResources().getString(
										R.string.app_name), "CANCEL");
							}
						});
				alertDialog.setSingleChoiceItems(color, 0, new DialogInterface.OnClickListener() {
					
					public void onClick(DialogInterface dialog, int which) {
						// TODO Auto-generated method stub
						
						
					}
				});
				alertDialog.setTitle("alert");
				alertDialog.show();
			}
		});
		
	}
}