大神求解救，总是进程终止，付源码

package com.ascleft.service;

import java.util.ArrayList;
import java.util.List;

import android.content.Context;
import com.ascleft.domain.*;

import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;



public class NoteDAO {
    private DBOpenHelper helper;// 创建DBOpenHelper对象
    private SQLiteDatabase db;// 创建SQLiteDatabase对象

    public NoteDAO(Context context)// 定义构造函数
    {
        helper = new DBOpenHelper(context);// 初始化DBOpenHelper对象
    }

    /**
     * 添加便签信息
     *
     * @param tb_flag
     */
    public void addnote(Note note) {
        db = helper.getWritableDatabase();// 初始化SQLiteDatabase对象
        db.execSQL("insert into note (mynotes) values (?)", new Object[] {
                note.getNotes() });// 执行添加便签信息操作
    }
//    /**
//     * 更新便签信息
//     *
//     * @param tb_flag
//     */
//    public void update(Note note) {
//        db = helper.getWritableDatabase();// 初始化SQLiteDatabase对象
//        db.execSQL("update note set flag = ? where _id = ?", new Object[] {
//                tb_flag.getFlag(), tb_flag.getid() });// 执行修改便签信息操作
//    }

    /**
     * 查找便签信息
     *
     * @param id
     * @return
     */
    public Note find(String notes ) {
        db = helper.getWritableDatabase();// 初始化SQLiteDatabase对象
        Cursor cursor = db.rawQuery(
                "select mynotes from note where mynotes = ?",
                new String[] { String.valueOf(notes) });// 根据编号查找便签信息，并存储到Cursor类中
        if (cursor.moveToNext())// 遍历查找到的便签信息
        {
            // 将遍历到的便签信息存储到Tb_flag类中
            return new Note(cursor.getString(cursor.getColumnIndex("mynotes")));
        }
        return null;// 如果没有信息，则返回null
    }
    /**
     * 获取便签信息
     *
     * @param start
     *            起始位置
     * @param count
     *            每页显示数量
     * @return
     */   
    public List<Note> getScrollData(int start, int count) {
        List<Note> listNote = new ArrayList<Note>();// 创建集合对象
        db = helper.getWritableDatabase();// 初始化SQLiteDatabase对象
        // 获取所有便签信息
        Cursor cursor = db.rawQuery("select note from mynote",new String[] { String.valueOf(start), String.valueOf(count) });
        while (cursor.moveToNext())// 遍历所有的便签信息
        {
            // 将遍历到的便签信息添加到集合中
            listNote.add(new Note(cursor.getString(cursor.getColumnIndex("note"))));
        }
        return listNote;// 返回集合
    }
    /**
     * 获取总记录数
     *
     * @return
     */
    public long getCount() {
        db = helper.getWritableDatabase();// 初始化SQLiteDatabase对象
        Cursor cursor = db.rawQuery("select count(note) from mynote", null);// 获取便签信息的记录数
        if (cursor.moveToNext())// 判断Cursor中是否有数据
        {
            return cursor.getLong(0);// 返回总记录数
        }
        return 0;// 如果没有数据，则返回0
    }
   
   
   

}<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas. android:id="@+id/iteminfo" android:orientation="vertical"
    android:layout_width="wrap_content" android:layout_height="wrap_content"
    android:layout_marginTop="5dp"
    android:weightSum="1">
    <LinearLayout android:id="@+id/linearLayout1"
            android:layout_height="wrap_content"
            android:layout_width="match_parent"
            android:orientation="vertical"
            android:layout_weight="0.06">
        <RelativeLayout
            android:layout_height="wrap_content"
            android:layout_width="match_parent">
           
            <Button android:text="返回"
                android:id="@+id/show_activity_close"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentLeft="true"
                android:textSize="20dp"
                android:textColor="#8C6931"
                />
            <Button android:text="刷新"
                android:id="@+id/show_activity_refresh"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:layout_alignParentRight="true"
                android:textSize="20dp"
                android:textColor="#8C6931"
            />
        </RelativeLayout>
    </LinearLayout>
    <LinearLayout android:id="@+id/linearLayout2"
        android:layout_height="wrap_content"
        android:layout_width="match_parent"
        android:orientation="vertical"
        android:layout_weight="0.94">
        <ListView android:id="@+id/lvinfo"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:scrollbarAlwaysDrawVerticalTrack="true"
            />
    </LinearLayout>
</LinearLayout>