本文章主要介绍了Android控件之CheckBox、RadioButton探究，具有不错的的参考价值，希望对您有所帮助，如解说有误或未考虑完全的地方，请您留言指出，谢谢！
CheckBox和RadioButton控件都只有选中和未选中状态，不同的是RadioButton是单选按钮，需要编制到一个RadioGroup中，同一时刻一个RadioGroup中只能有一个按钮处于选中状态。
以下为CheckBox和RadioButton常用方法及说明
以下为单选按钮和复选按钮的使用方法
目录结构
main.xml布局文件
<? xml version = " 1.0 " encoding = " utf-8 " ?>
< ScrollView xmlns:android = " http://schemas.android.com/apk/res/android "
android:layout_width = " fill_parent "
android:layout_height = " fill_parent "
android:scrollbars = " vertical " >
< LinearLayout android:orientation = " vertical "
android:layout_width = " fill_parent "
android:layout_height = " fill_parent " >
<!-- RadioButton控件演示 -->
< ImageView android:id = " @+id/imageView01 "
android:layout_width = " wrap_content "
android:layout_height = " wrap_content "
android:src = " @drawable/bulb_on "
android:layout_gravity = " center_horizontal " />
< RadioGroup android:id = " @+id/radioGroup "
android:orientation = " horizontal "
android:layout_width = " wrap_content "
android:layout_height = " wrap_content "
android:layout_gravity = " center_horizontal " >
< RadioButton android:id = " @+id/on "
android:text = " 开灯 "
android:layout_width = " wrap_content "
android:layout_height = " wrap_content "
android:checked = " true " />
< RadioButton android:id = " @+id/off "
android:text = " 关灯 "
android:layout_width = " wrap_content "
android:layout_height = " wrap_content " />
</ RadioGroup >
<!-- CheckBox控件演示 -->
< ImageView android:id = " @+id/imageView02 "
android:layout_width = " wrap_content "
android:layout_height = " wrap_content "
android:src = " @drawable/bulb_on "
android:layout_gravity = " center_horizontal " />
< CheckBox android:id = " @+id/checkBox "
android:text = " 开灯 "
android:checked = " true "
android:layout_width = " wrap_content "
android:layout_height = " wrap_content "
android:layout_gravity = " center_horizontal " />
</ LinearLayout >
</ ScrollView >
CbRbActivity类
package com.ljq.activity;
import android.app.Activity;
import android.os.Bundle;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
public class CbRbActivity extends Activity {
private ImageView imageView01 = null ;
private ImageView imageView02 = null ;
private CheckBox checkBox = null ;
private RadioButton on = null ; // 开灯
@Override
public void onCreate(Bundle savedInstanceState) {
super .onCreate(savedInstanceState);
setContentView(R.layout.main);
imageView01 = (ImageView)findViewById(R.id.imageView01);
imageView02 = (ImageView)findViewById(R.id.imageView02);
checkBox = (CheckBox)findViewById(R.id.checkBox);
on = (RadioButton)findViewById(R.id.on);
on.setOnCheckedChangeListener(listener);
checkBox.setOnCheckedChangeListener(listener);
}
OnCheckedChangeListener listener = new OnCheckedChangeListener(){
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
if (buttonView instanceof RadioButton){
imageView01.setImageResource(isChecked ? R.drawable.bulb_on:R.drawable.bulb_off);
} else if (buttonView instanceof CheckBox){
checkBox.setText(isChecked ? " 开灯 " : " 关灯 " );
imageView02.setImageResource(isChecked ? R.drawable.bulb_on:R.drawable.bulb_off);
}
}
};
}
运行结果
原创文章，作者：254126420，如若转载，请注明出处：https://blog.ytso.com/228183.html