ラジオボタン

package org.example.helloworld;

import android.app.*;
import android.os.*;
import android.view.*;
import android.view.View.*;
import android.widget.*;

public class HelloWorld extends Activity
{
    public void onCreate(Bundle savedInstanceState)
    {
      super.onCreate(savedInstanceState);

      LinearLayout ll = new LinearLayout(this);
      ll.setOrientation(LinearLayout.VERTICAL);
      setContentView(ll);

      RadioButton rb1 = new RadioButton(this);
      RadioButton rb2 = new RadioButton(this);
      rb1.setText("A");
      rb2.setText("B");

      RadioGroup rg = new RadioGroup(this);

      rg.addView(rb1);
      rg.addView(rb2);

      rb1.setChecked(true);

      ll.addView(rg);

      rb1.setOnClickListener(new SampleClickListener());
      rb2.setOnClickListener(new SampleClickListener());
    }

    class SampleClickListener implements OnClickListener
    {
      public void onClick(View v){
        AlertDialog.Builder adlg;
        adlg = new AlertDialog.Builder(HelloWorld.this);
        adlg.setTitle("Test");
        RadioButton rb = (RadioButton)v;
        adlg.setMessage("Selected " + rb.getText());
        adlg.setPositiveButton("YES", null);
        adlg.show();
      }
    }
}