andorid 单选与复选

activity_ui1.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:padding="10dp"
    android:orientation="vertical"
    tools:context="com.hanqi.application3.UIActivity1"
    android:weightSum="1">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="请选择Android的开发语言是什么"/>
    <RadioGroup
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:id="@+id/rb"
        >
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="C++"
            android:id="@+id/rb1"
            android:layout_marginRight="30dp"
            android:checked="true"
            />
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="C"
            android:id="@+id/rb2"
            android:layout_marginRight="30dp"
            />
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="JAVA"
            android:id="@+id/rb3"
            android:layout_marginRight="30dp"
            />
        <RadioButton
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="C#"
            android:id="@+id/rb4"
            android:layout_marginRight="30dp"
            />

    </RadioGroup>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="请选择字体效果"/>
    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="宋体"
        android:id="@+id/cb_st"
        android:checked="true"
        />
    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="加粗"
        android:id="@+id/cb_jc"
        />
    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="斜体"
        android:id="@+id/cb_xt"
        />
    <CheckBox
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="下划线"
        android:id="@+id/cb_xhx"
        />


</LinearLayout>

UIActivity1.java

package com.hanqi.application3;

import android.app.Activity;
import android.os.Bundle;
import android.support.annotation.IdRes;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;

import static android.widget.CompoundButton.*;

public class UIActivity1 extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ui1);

        RadioGroup radioGroup = (RadioGroup)findViewById(R.id.rb);

        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {

            public void onCheckedChanged(RadioGroup group, @IdRes int checkedId) {

                if (checkedId == R.id.rb3) {
                    Toast.makeText(UIActivity1.this, "选对了", Toast.LENGTH_SHORT).show();
                }
                RadioButton rb = (RadioButton) findViewById(checkedId);

                Toast.makeText(UIActivity1.this, rb.getText(), Toast.LENGTH_SHORT).show();
            }


        });

        CheckBox cb_st= (CheckBox)findViewById(R.id.cb_st);
        cb_st.setOnCheckedChangeListener(new CBOnCheckChangeListenter());
        CheckBox cb_xt= (CheckBox)findViewById(R.id.cb_xt);
        cb_xt.setOnCheckedChangeListener(new CBOnCheckChangeListenter());
        CheckBox cb_jc= (CheckBox)findViewById(R.id.cb_jc);
        cb_jc.setOnCheckedChangeListener(new CBOnCheckChangeListenter());
        CheckBox cb_xhx= (CheckBox)findViewById(R.id.cb_xhx);
        cb_xhx.setOnCheckedChangeListener(new CBOnCheckChangeListenter());
    }



    private class CBOnCheckChangeListenter implements OnCheckedChangeListener
    {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {

            CheckBox cb = (CheckBox)buttonView;
            if (isChecked) {
                Toast.makeText(UIActivity1.this, "选中了", Toast.LENGTH_SHORT).show();
            }
            else
            {
                Toast.makeText(UIActivity1.this, "取消了", Toast.LENGTH_SHORT).show();
            }
        }
    }
}