package com.lxt008;import com.lxt008.R;import android.app.Activity;import android.os.Bundle;import android.view.Gravity;import android.view.View;import android.widget.Button;import android.widget.CheckBox;import android.widget.CompoundButton;import android.widget.TextView;import android.widget.Toast;public class Activity01 extends Activity{    //用来显示题目    TextView    m_TextView1;    //“提交按钮”    Button        m_Button1;    //4个多选项    CheckBox    m_CheckBox1;    CheckBox    m_CheckBox2;    CheckBox    m_CheckBox3;    CheckBox    m_CheckBox4;        /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState)    {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        m_TextView1 = (TextView) findViewById(R.id.TextView1);        m_Button1 = (Button) findViewById(R.id.button1);        /* 取得每个CheckBox对象 */        m_CheckBox1 = (CheckBox) findViewById(R.id.CheckBox1);        m_CheckBox2 = (CheckBox) findViewById(R.id.CheckBox2);        m_CheckBox3 = (CheckBox) findViewById(R.id.CheckBox3);        m_CheckBox4 = (CheckBox) findViewById(R.id.CheckBox4);        //对每个选项设置事件监听        m_CheckBox1.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener() {            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)            {                if(m_CheckBox1.isChecked())                {                    DisplayToast("你选择了："+m_CheckBox1.getText());                }            }        });        ////////////////////        m_CheckBox2.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener() {                        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)            {                if(m_CheckBox2.isChecked())                {                    DisplayToast("你选择了："+m_CheckBox2.getText());                }            }        });        /////////////////        m_CheckBox3.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener() {                        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)            {                if(m_CheckBox3.isChecked())                {                    DisplayToast("你选择了："+m_CheckBox3.getText());                }            }        });        ////////////////        m_CheckBox4.setOnCheckedChangeListener(new CheckBox.OnCheckedChangeListener() {                        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)            {                if(m_CheckBox4.isChecked())                {                    DisplayToast("你选择了："+m_CheckBox4.getText());                }            }        });        //对按钮设置事件监听        m_Button1.setOnClickListener(new Button.OnClickListener() {            public void onClick(View v)            {                int num = 0;                if(m_CheckBox1.isChecked())                {                    num++;                }                if(m_CheckBox2.isChecked())                {                    num++;                }                if(m_CheckBox3.isChecked())                {                    num++;                }                if(m_CheckBox4.isChecked())                {                    num++;                }                DisplayToast("谢谢参与！你一共选择了"+num+"项！");            }        });    }        /* 显示Toast  */    public void DisplayToast(String str)    {        Toast toast = Toast.makeText(this, str, Toast.LENGTH_SHORT);        //设置toast显示的位置        toast.setGravity(Gravity.TOP, 0, 220);        //显示该Toast        toast.show();    }}

<?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"    ><TextView        android:id="@+id/TextView1"    android:layout_width="fill_parent"     android:layout_height="wrap_content"     android:text="@string/hello"    /><CheckBox  android:id="@+id/CheckBox1"  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:text="@string/CheckBox1"></CheckBox><CheckBox  android:id="@+id/CheckBox2"  android:layout_width="fill_parent"  android:layout_height="wrap_content"  android:text="@string/CheckBox2"></CheckBox><CheckBoxandroid:id="@+id/CheckBox3"android:layout_width="fill_parent"android:layout_height="wrap_content"android:text="@string/CheckBox3"></CheckBox><CheckBoxandroid:id="@+id/CheckBox4"android:layout_width="fill_parent"android:layout_height="wrap_content"android:text="@string/CheckBox4"></CheckBox>    <Button      android:id="@+id/button1"      android:layout_width="wrap_content"      android:layout_height="wrap_content"      android:text="提交"    >    </Button></LinearLayout>