Android单选按钮对话框用法实例分析

<?xml version="1.0" encoding="utf-8"?>
<linearlayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical" android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <edittext android:text="" 
    android:id="@+id/edittext"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" 
    android:editable="false"
    android:cursorvisible="false" />
  <button android:text="显示单选对话框" 
    android:id="@+id/button"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content" />
</linearlayout>

<?xml version="1.0" encoding="utf-8"?>
<resources>
 <string-array name="hobby">
   <item>游泳</item>
   <item>打篮球</item>
   <item>登山</item>
 </string-array>
</resources>

package com.ljq.dialog;
import android.app.activity;
import android.app.dialog;
import android.app.alertdialog.builder;
import android.content.dialoginterface;
import android.content.dialoginterface.onclicklistener;
import android.os.bundle;
import android.view.view;
import android.widget.button;
import android.widget.edittext;
public class alertdialog extends activity {
  private edittext edittext;
  private final static int dialog=1;
  @override
  public void oncreate(bundle savedinstancestate) {
    super.oncreate(savedinstancestate);
    setcontentview(r.layout.main);
    edittext=(edittext)findviewbyid(r.id.edittext);
    button button = (button) findviewbyid(r.id.button);
    button.setonclicklistener(new view.onclicklistener() {
      public void onclick(view v) {
        // 显示对话框
        showdialog(dialog);
      }
    });
  }
  /**
   * 创建单选按钮对话框
   */
  @override
  protected dialog oncreatedialog(int id) {
    dialog dialog=null;
    switch (id) {
    case dialog:
      builder builder=new android.app.alertdialog.builder(this);
      //设置对话框的图标
      builder.seticon(r.drawable.header);
      //设置对话框的标题
      builder.settitle("单选按钮对话框");
      //0: 默认第一个单选按钮被选中
      builder.setsinglechoiceitems(r.array.hobby, 0, new onclicklistener(){
        public void onclick(dialoginterface dialog, int which) {
          string hoddy=getresources().getstringarray(r.array.hobby)[which];
          edittext.settext("您选择了： "+hoddy);
        }
      });
      //添加一个确定按钮
      builder.setpositivebutton(" 确 定 ", new dialoginterface.onclicklistener(){
        public void onclick(dialoginterface dialog, int which) {
        }
      });
      //创建一个单选按钮对话框
      dialog=builder.create();
      break;
    }
    return dialog;
  }
}