android对话框，checkBox,同一时候在同一个页面上保存数据

package com.example.selectonlyonle;


import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.content.DialogInterface;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;


public class MainActivity extends Activity {


private EditText editText;
private final static int DIALOG = 1;
boolean[] flags = new boolean[] { false, false, false, false };// 初始复选情况
String[] items = null;
private String lv_items[] = { "轮胎（400）", " 无骨雨刷（100）", "刹车片（235）",
"刹车盘（500）" };
private String lv_items_value[] = { "400", "100", "235", "500" };
private String result;
private int motoal;
private String test;


@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);


items = getResources().getStringArray(R.array.hobby);
editText = (EditText) findViewById(R.id.editText);
Button button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
// 显示对话框
showDialog(DIALOG);
}
});
}


/**
* 创建复选框对话框
*/
@Override
public Dialog onCreateDialog(int id) {
Dialog dialog = null;
switch (id) {
case DIALOG:
AlertDialog.Builder builder = new AlertDialog.Builder(this);
// 设置对话框的图标
// builder.setIcon(R.drawable.header);
// 设置对话框的标题
builder.setTitle("复选框对话框");
builder.setMultiChoiceItems(R.array.hobby, flags,
new DialogInterface.OnMultiChoiceClickListener() {
public void onClick(DialogInterface dialog, int which,
boolean isChecked) {
flags[which] = isChecked;
System.out.println(which+"==which==="+which);
result = "您选择了：";
// for (int i = 0; i < flags.length; i++) {
if (flags[which]) {
result = result + items[which] + "、";
motoal = motoal
+ Integer
.valueOf(lv_items_value[which]);
System.out.println(result + "======"
+ motoal);
// test = test +lv_items_value[i];

}
// }
if (!flags[which]) {
// 假设选中了又不选了
motoal = motoal
- Integer
.valueOf(lv_items_value[which]);
System.out.println("==motoal=0="
+ motoal);
}
// for (int a = 0; a < 4; a++) {
// if (flags[a] == false) {
// motoal = motoal
// - Integer
// .valueOf(lv_items_value[a]);
// System.out.println("==motoal=0="
// + motoal);
// }
// }
// System.out.println("========="+test);
// editText.setText(motoal+"");
editText.setText(motoal + "");
}
});
// builder.setPositiveButton(result,
// new DialogInterface.OnClickListener() {
// public void onClick(DialogInterface dialog, int which) {
// }
// });
// 加入一个确定button
builder.setPositiveButton(" 确 定 ",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
}
});
// 创建一个复选框对话框
dialog = builder.create();
break;
}
return dialog;
}

}

----------------------array.xml---------------------------------

<?xml version="1.0" encoding="utf-8"?

>
<resources>
  <string-array name="hobby">        
     <item>轮胎（400）</item>            
     <item>无骨雨刷（100）</item>            
     <item>刹车片（235）</item>        
     <item>刹车盘（500）</item>        
  </string-array>
</resources>

这是看着网上的代码，仅仅是稍加了自己的理解。以及checkbox中数据的加减

------------------------------activity_main.xml-----------

<?xml version="1.0" encoding="utf-8"?

>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >


    <EditText
        android:id="@+id/editText"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:cursorVisible="false"
        android:editable="false"
        android:text="" />


    <Button
        android:id="@+id/button"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="显示复选框对话框" />


</LinearLayout>