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一、单选按钮
单选按钮类：RadioButton
android：checked="true"设置默认选中
单选按钮控件通常与RadioGroup搭配使用。
RadioGroup是LinearLayout的子类，用于将多个单选按钮组合为一组。
同一按钮组内的单选按钮只能有一个被选中。
二、多选按钮
用法基本与Button相同
CheckBox对象.isChecked()方法可以用来判断复选按钮是否选中
效果图（单选多选写在一个项目里边，用了一个页面跳转）：
项目目录：
多选按钮，两种形式
代码：
activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="${relativePackage}.${activityClass}" >
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="RadioActivity单选" />
<Button
android:id="@+id/button2"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="CheckActivity多选" />
</LinearLayout>MainActivity.java
package com.example.radioandcheckdemo;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity implements OnClickListener{
private Button button1;
private Button button2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button1 = (Button) findViewById(R.id.button1);
button2 = (Button) findViewById(R.id.button2);
button1.setOnClickListener(this);
button2.setOnClickListener(this);
}
@Override
public void onClick(View v) {
Intent intent = new Intent();
switch (v.getId()) {
case R.id.button1:
//跳转页面
intent.setClass(MainActivity.this, RadioActivity.class);
startActivity(intent);
break;
case R.id.button2:
//跳转页面
intent.setClass(MainActivity.this, CheckActivity.class);
startActivity(intent);
default:
break;
}
}
}activity_radio.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_margin="20sp"
tools:context="${relativePackage}.${activityClass}" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/hello_world" />
<!--
单选
android：checked="true"设置默认选中
-->
<RadioGroup
android:id="@+id/group1"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<RadioButton
android:id="@+id/radio1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:checked="true"
android:text="男"/>
<RadioButton
android:id="@+id/radio2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="女"/>
</RadioGroup>
<!-- 分界线 -->
<View
android:layout_width="match_parent"
android:layout_height="2sp"
android:background="@android:color/holo_blue_dark"
android:layout_marginTop="10sp"
android:layout_marginBottom="10sp" />
<TextView
android:id="@+id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="18sp"
android:text="你吃饭了吗?"/>
<RadioGroup
android:id="@+id/group2"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<RadioButton
android:id="@+id/radio3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="吃了"/>
<RadioButton
android:id="@+id/radio4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="没吃"/>
</RadioGroup>
</LinearLayout>RadioActivity.java
package com.example.radioandcheckdemo;
import android.app.Activity;
import android.os.Bundle;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.RadioGroup.OnCheckedChangeListener;
import android.widget.Toast;
public class RadioActivity extends Activity implements OnCheckedChangeListener {
private RadioGroup group1;
private RadioGroup group2;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_radio);
group1 = (RadioGroup) findViewById(R.id.group1);
group2 = (RadioGroup) findViewById(R.id.group2);
group1.setOnCheckedChangeListener(this);
group2.setOnCheckedChangeListener(this);
}
@Override
public void onCheckedChanged(RadioGroup group, int checkedId) {
//显示值的几种方法
//checkedId选中RadioButton的id
/*switch (checkedId) {
case R.id.radio1:
Toast.makeText(this, "男", Toast.LENGTH_LONG).show();
break;
case R.id.radio2:
Toast.makeText(this, "女", Toast.LENGTH_LONG).show();
break;
case R.id.radio3:
Toast.makeText(this, "吃了", Toast.LENGTH_LONG).show();
break;
case R.id.radio4:
Toast.makeText(this, "没吃", Toast.LENGTH_LONG).show();
break;
default:
break;
}*/
//找到点击的RadioButton
//RadioButton radio = (RadioButton) findViewById(checkedId);
//取出RadioButton中的值
//String str = radio.getText().toString();
//弹框显示选中的值
//Toast.makeText(this, str, Toast.LENGTH_LONG).show();
//两组数据同时显示
//根据RadioGroup取出数据，没有选中返回-1
String str = "";
int buttonId = group1.getCheckedRadioButtonId();
if(buttonId != -1){
RadioButton radio = (RadioButton) findViewById(buttonId);
str = "你的性别是" + radio.getText().toString();
}else{
str = "你没有选择性别";
}
buttonId = group2.getCheckedRadioButtonId();
if(buttonId != -1){
RadioButton radio = (RadioButton) findViewById(buttonId);
str += "， 你吃饭了吗？"+radio.getText().toString();
}
Toast.makeText(this, str, Toast.LENGTH_LONG).show();
}
}activity_check.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/LinearLayout1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context="${relativePackage}.${activityClass}" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="选择所学课程：" />
<CheckBox
android:id="@+id/check1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="HTML" />
<CheckBox
android:id="@+id/check2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="C" />
<CheckBox
android:id="@+id/check3"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="php" />
<CheckBox
android:id="@+id/check4"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="java" />
<Button
android:id="@+id/button1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="提交" />
</LinearLayout>CheckActivity.java
package com.example.radioandcheckdemo;
import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.widget.Toast;
public class CheckActivity extends Activity {
private CheckBox check1;
private CheckBox check2;
private CheckBox check3;
private CheckBox check4;
private Button button1;
private OnCheckedChangeListener listenter = new OnCheckedChangeListener() {
@Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
//选中多选框
CheckBox check = (CheckBox)buttonView;
//取出当前勾选值
String str = check.getText().toString();
//判断是否勾选状态
if(isChecked){
str = "你学了"+str;
}else{
str = "你没学"+str;
}
Toast.makeText(CheckActivity.this, str, Toast.LENGTH_LONG).show();
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_check);
check1 = (CheckBox) findViewById(R.id.check1);
check2 = (CheckBox) findViewById(R.id.check2);
check3 = (CheckBox) findViewById(R.id.check3);
check4 = (CheckBox) findViewById(R.id.check4);
button1 = (Button) findViewById(R.id.button1);
//多选框点击事件
/*check1.setOnCheckedChangeListener(listenter);
check2.setOnCheckedChangeListener(listenter);
check3.setOnCheckedChangeListener(listenter);
check4.setOnCheckedChangeListener(listenter);*/
//提交按钮点击事件
button1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
String str = "我学过了";
boolean f = false;
if(check1.isChecked()){
str += check1.getText()+",";
f = true;
}
if(check2.isChecked()){
str += check2.getText()+",";
f = true;
}
if(check3.isChecked()){
str += check3.getText()+",";
f = true;
}
if(check4.isChecked()){
str += check4.getText()+",";
f = true;
}
if(f){
str = str.substring(0, str.length()-1);
}
Toast.makeText(CheckActivity.this, str, Toast.LENGTH_LONG).show();
}
});
}
}