android 带RadioButton的Dialog

package com.example.dialog3;

import android.os.Bundle;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.view.Menu;
import android.widget.Toast;

public class MainActivity extends Activity {
private int selectedFruitIndex = 0;

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

final String[] Fruit = new String[] {"苹果", "橘子", "草莓", "香蕉"};

Dialog myDialog = new AlertDialog.Builder(this)
.setTitle("标题")
.setIcon(R.drawable.ic_launcher)
.setSingleChoiceItems(Fruit, 0, new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
selectedFruitIndex=which;
Toast.makeText(MainActivity.this, Fruit[which], Toast.LENGTH_SHORT).show();
}
})
.setPositiveButton("确定", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub
//
}
})
.setNegativeButton("取消", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub

}
})
.setNeutralButton("详情", new DialogInterface.OnClickListener() {

@Override
public void onClick(DialogInterface dialog, int which) {
// TODO Auto-generated method stub

}
})
.create();

myDialog.show();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}