Android编程开发之RadioGroup用法实例

本文实例讲述了android编程开发之radiogroup用法。分享给大家供大家参考，具体如下：

radiogroup 有时候比较有用．主要特征是给用户提供多选一机制。

mainactivity.java

package com.example.lesson16_radio;
import android.app.activity;
import android.os.bundle;
import android.widget.radiobutton;
import android.widget.radiogroup;
import android.widget.toast;
public class mainactivity extends activity {
 private radiogroup group_temo;
 private radiobutton checkradiobutton;
 @override
 protected void oncreate(bundle savedinstancestate) {
  super.oncreate(savedinstancestate);
  setcontentview(r.layout.activity_main);
  group_temo = (radiogroup) findviewbyid(r.id.radiogroup1);
  // 改变默认选项
  group_temo.check(r.id.radio1);
  // 获取默认被被选中值
  checkradiobutton = (radiobutton) group_temo.findviewbyid(group_temo
    .getcheckedradiobuttonid());
  toast.maketext(this, "默认的选项的值是:" + checkradiobutton.gettext(),
    toast.length_long).show();
  // 注册事件
  group_temo
    .setoncheckedchangelistener(new radiogroup.oncheckedchangelistener() {
     @override
     public void oncheckedchanged(radiogroup group, int checkedid) {
      // 点击事件获取的选择对象
      checkradiobutton = (radiobutton) group_temo
        .findviewbyid(checkedid);
      toast.maketext(getapplicationcontext(),
        "获取的id是" + checkradiobutton.gettext(),
        toast.length_long).show();
     }
    });
 }
}

布局文件

<relativelayout xmlns:android="http://schemas.android.com/apk/res/android"
 xmlns:tools="http://schemas.android.com/tools"
 android:layout_width="match_parent"
 android:layout_height="match_parent"
 android:paddingbottom="@dimen/activity_vertical_margin"
 android:paddingleft="@dimen/activity_horizontal_margin"
 android:paddingright="@dimen/activity_horizontal_margin"
 android:paddingtop="@dimen/activity_vertical_margin"
 tools:context=".mainactivity" >
 <radiogroup
  android:id="@+id/radiogroup1"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content"
  android:layout_alignparentleft="true"
  android:layout_alignparentright="true"
  android:layout_alignparenttop="true" >
  <radiobutton
   android:id="@+id/radio0"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:checked="true"
   android:text="@string/text_java" />
  <radiobutton
   android:id="@+id/radio1"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="@string/text_net" />
  <radiobutton
   android:id="@+id/radio2"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:text="@string/text_php" />
 </radiogroup>
</relativelayout>

希望本文所述对大家android程序设计有所帮助。