多选按钮CheckBox实例

多选按钮(CheckBox)实例

java代码

package com.pms.mycheckbox;import android.app.Activity;import android.os.Bundle;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.TextView;public class MyCheckBox extends Activity {private CheckBox cb1;private CheckBox cb2;private CheckBox cb3;private TextView tv;  //用来显示题目及用户的选择情况private Button   bt;private TextView tv_result;int sum = 0;          //用来对勾选的项目计数    /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);                /*得到各个控件的引用*/        cb1 = (CheckBox) findViewById(R.id.cb1);        cb2 = (CheckBox) findViewById(R.id.cb2);        cb3 = (CheckBox) findViewById(R.id.cb3);        tv  = (TextView) findViewById(R.id.tv);        bt = (Button) findViewById(R.id.bt);        tv_result = (TextView) findViewById(R.id.tvresult);                /*为每个CheckBox绑定监听器来获得选择情况,根据选择情况设置显示文本内容，并且为选中的计数*/        cb1.setOnCheckedChangeListener(new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {if(cb1.isChecked()){tv.setText("你刚刚选择了"+ cb1.getText());sum++;}else{tv.setText("你刚刚取消了选择"+cb1.getText());sum--;}}});                cb2.setOnCheckedChangeListener(new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {if(cb2.isChecked()){tv.setText("你刚刚选择了"+ cb2.getText());sum++;}else{tv.setText("你刚刚取消了选择"+cb2.getText());sum--;}}});                cb3.setOnCheckedChangeListener(new OnCheckedChangeListener() {@Overridepublic void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {if(cb3.isChecked()){tv.setText("你刚刚选择了"+ cb3.getText());sum++;}else{tv.setText("你刚刚取消了选择"+cb3.getText());sum--;}}});                /*为Button绑定监听器*/        bt.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {String result = "";  //用来存放结果/*取出选中的内容，换行显示*/if(cb1.isChecked()) result += cb1.getText() + "\n";if(cb2.isChecked()) result += cb2.getText() + "\n";if(cb3.isChecked()) result += cb3.getText() + "\n";if(result!="")//判断是否为空值{tv_result.setText("你的目标是:"  + "\n" + result + "\n" + "你一共选择了" + sum + "个选项");}else{tv_result.setText("选择不能为空！年轻人要有点追求啊！");}}});            }}

布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:orientation="vertical"    android:layout_width="fill_parent"    android:layout_height="fill_parent"    ><TextViewandroid:id="@+id/tv"      android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="你现在的目标有哪些？"    /><CheckBoxandroid:id="@+id/cb1"android:layout_width="fill_parent"android:layout_height="wrap_content"android:text="掌握android开发"/><CheckBoxandroid:id="@+id/cb2"android:layout_width="fill_parent"android:layout_height="wrap_content"android:text="找到更好的工作"/><CheckBoxandroid:id="@+id/cb3"android:layout_width="fill_parent"android:layout_height="wrap_content"android:text="身体健康最重要~"/><Buttonandroid:id="@+id/bt"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="提交答案"/><TextViewandroid:id="@+id/tvresult"android:layout_width="fill_parent"android:layout_height="wrap_content"/></LinearLayout>

运行结果

总结

多选框的监听方法

 cb1.setOnCheckedChangeListener(new OnCheckedChangeListener() {
   
   @Override
   public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
    if(cb1.isChecked())
    {
     }
  });