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。