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