Android应用开发UI（单选框）

在Android平台上，单项选择的组件，可以通过RadioGroup和RadioButton组合来实现多选一的效果，如图：

代码如下：

1. res/values/string.xml

<?xml version="1.0" encoding="utf-8"?>    Android底层是基于什么操作系统？    单选框RadioButton和RadioGroup    Windows    Linux    Mac OS    JAVA    更多详情，可登录http://www.80080088.com了解。

2.res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?>

3,Activity代码

package com.cottsoft.android;import android.app.Activity;import android.graphics.Color;import android.os.Bundle;import android.view.Gravity;import android.widget.RadioButton;import android.widget.RadioGroup;import android.widget.TextView;import android.widget.Toast;public class A006Activity extends Activity {private TextView m_TextView,m_TextView_About;private RadioGroup m_RadioGroup;private RadioButton m_Radio1,m_Radio2,m_Radio3,m_Radio4;    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                m_TextView = (TextView)findViewById(R.id.title_txt);        m_TextView_About = (TextView)findViewById(R.id.about_80080088);        m_RadioGroup = (RadioGroup)findViewById(R.id.rdGroup);        m_Radio1 = (RadioButton)findViewById(R.id.windows);        m_Radio2 = (RadioButton)findViewById(R.id.linux);        m_Radio3 = (RadioButton)findViewById(R.id.mac);        m_Radio4 = (RadioButton)findViewById(R.id.java);                m_TextView.setTextSize(25);                m_TextView_About.setTextColor(Color.GRAY);        m_TextView_About.setTextSize(15);                m_RadioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(RadioGroup group, int checkedId) {if(checkedId == m_Radio2.getId()){displayToast("正确答案："+m_Radio2.getText()+",恭喜你，回答正确。");}else{displayToast("回答错误！");}}});    }        public void displayToast(String str){    Toast toast = Toast.makeText(this, str, Toast.LENGTH_SHORT);    toast.setGravity(Gravity.TOP, 0, 340);    toast.show();    }}

更多相关文章

随机推荐