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
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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();
}
});
}
}
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布局文件
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<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>
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希望本文所述对大家android程序设计有所帮助。