在用SQLiteDatabase的时候如果碰到说database或者cursor没有关闭,可以在使用完之后加上: if (!cursor.isClosed()) { cursor.close(); } if(db!= null) { db.close();//db是数据库对象 }…

2016-03-16 Android数据库支持 本文节选并翻译<Enterprise Android - Programing Android Database Applications for the Enterprise>.学习目标: 学习Android对SQL的支持. 理解在Java中使用SQL——通过SQLiteDatabase类. 创建数据库——SQLiteOpenHelper类. 理解loaders.cursors和adapters. 为了在程序中使用本地的,结构化的数据,需要完成…

http://www.onjava.com/pub/a/onjava/2001/05/30/optimization.htmlComparing the performance of LinkedLists and ArrayLists (and Vectors) (Page last updated May 2001, Added 2001-06-18, Author Jack Shirazi, Publisher OnJava). Tips: ArrayList is faster than…

这几天项目需要,简单研究了一下countly,说实话完全满足项目需要,比umeng这类产品干净多了. Countly Mobile Analytics 下面就讲一下android 集成的过程,以及 服务器端报表部分的使用. 1.android 集成. 下载完后,一个工程4个文件,很整洁,赞一个. 这个工程,运行之前把libary去掉勾选,默认这个工程被设置成一个库了. 然后,直接打开CounlyActivity.java这个文件, Countly.sharedInstance().init(th…

原文:https://www.ibm.com/support/knowledgecenter/zh/SSEPGG_9.7.0/com.ibm.db2.luw.admin.trb.doc/doc/c0054595.html https://www.ibm.com/support/knowledgecenter/zh/SSEPGG_9.8.0/com.ibm.db2.luw.admin.cmd.doc/doc/r0011729.html#r0011729__pdlatch----db2pd - Mo…

UPDATE: the source code for DbContextScope is now available on GitHub: DbContextScope on GitHub. A bit of context This isn't the first post that has been written about managing the DbContext lifetime in Entity Framework-based applications. In fact, t…

/** * Copyright (C) 2006 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://…

资源 jetty Jetty Downloads地址 sqlite sqlite JDBC Driver 地址:bitbucket代码托管 和 Github代码托管 jetty配置sqlite 在jetty里的配置(工程MWeb为例) /MWeb/WebContent/WEB-INF/jetty-web.xml <?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE Configure PUBLIC &q…

Database Primary key and Foreign key --Create Referenced Table CREATE TABLE Department ( DeptID int PRIMARY KEY, --define primary key Name varchar (50) NOT NULL, Address varchar(100) NULL ) --Create Referencing Table CREATE TABLE Employee ( EmpID int…

作者:david_zhang@sh [转载时请以超链接形式标明文章] http://www.cnblogs.com/david-zhang-index/p/5042640.html参照文档:https://azure.microsoft.com/en-us/documentation/articles/virtual-machines-configuring-oracle-data-guard/?cdn=disable#implement-the-physical-standby-databas…