android 显示单选列表对话框 builder.setSingleChoiceItems

android 显示单选列表对话框
builder.setSingleChoiceItems
通过AlertDialog.Builder类的setSingleChoiceItems方法可以创建带单按钮的列表：方法如下：1、从资源文件中装载数据：public Builder setSingleChoiceItems(int itemsId, int checkedItem, final OnClickListener listener)2、从数据集中装载数据public Builder setSingleChoiceItems(Cursor cursor, int checkedItem, String labelColumn, final OnClickListener listener)3、从字符串数组中装载数据public Builder setSingleChoiceItems(CharSequence[] items, int checkedItem, final OnClickListener listener)4、从ListAdapter对象中装载数据public Builder setSingleChoiceItems(ListAdapter adpater, int checkedItem, final OnClickListener listener)
package com.js.sinlgechoiceitemstest; import
android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import
android.os.Bundle;import android.os.Handler;import android.view.View;import
android.view.View.OnClickListener;import
android.widget.Button;import android.widget.Toast; public
class SingleChoiceItemsTest extends Activity implements OnClickListener{ private String[] province = new String[] { "上海", "北京", "湖南", "湖北", "海南" }; private Button btnSingleChoiceList; // 单击事件对象的实例
private ButtonOnClick buttonOnClick = new ButtonOnClick(1); /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState)
{ super.onCreate(savedInstanceState); setContentView(yout.main);
btnSingleChoiceList = (Button)
findViewById(R.id.btnSingleChoice); btnSingleChoiceList.setOnClickListener(this); }
@Override public void onClick(View v)
{ showSingleChoiceButton(); } // 在单选选项中显示确定和取消按钮//buttonOnClickg变量的数
据类型是ButtonOnClick,一个单击事件类private void showSingleChoiceButton() { AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("请选择省份");
builder.setSingleChoiceItems(province, 0, buttonOnClick); builder.setPositiveButton("确定", buttonOnClick);
builder.setNegativeButton("取消", buttonOnClick); builder.show(); } private class ButtonOnClick implements DialogInterface.OnClickListener
{ private int index; // 表示选项的索引
public ButtonOnClick(int index)
{ this.index = index; }
@Override public void onClick(DialogInterface dialog, int which) { // which表示单击的按钮索引，所有的选项索引都是大于0，按钮索引都是小于0的。

if (which >= 0)
{ //如果单击的是列表项，将当前列表项的索引保存在index中。

//如果想单击列表项后关闭对话框，可在此处调用dialog.cancel() //或是用dialog.dismiss()方法。

index = which; } else
{ //用户单击的是【确定】按钮
if (which == DialogInterface.BUTTON_POSITIVE)
{ //显示用户选择的是第几个列表项。

final AlertDialog ad = new
AlertDialog.Builder( SingleCh oiceItemsTest.this).setMessage(
"你选择的地区是：" + index + ":" +
province[index]).show(); //五秒钟后自动关闭。

Handler hander = new Handler(); Runnable runnable = new Runnable()
{ @Override
public void run()
{ ad.dismiss();
} };
hander.postDelayed(runnable, 5 * 1000); } //用户单击的是【取消】按钮else if (which == DialogInterface.BUTTON_NEGATIVE)
{ Toast.makeText(SingleChoiceItemsT est.this, "你没有选择任何东西",
Toast.LENGTH_LONG); } } } }}。