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 Activityimplements 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(R.layout.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(

                          SingleChoiceItemsTest.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(SingleChoiceItemsTest.this, "你没有选择任何东西",

                          Toast.LENGTH_LONG);

              }

           }

       }

    }

}