Disclaimer: The book "Secrets of Android Application Development", which records the logs of the book, references the relevant code and summary, and has no commercial use, it is completely a record of self-learning, and many problems will inevitably occur in learning just now. If there are any mistakes, please criticize them a lot.
I. Data Storage-SQLite database operations
Three data operations have been l
As an Android preset database module, it is necessary to have a deep understanding of SQLite and find some optimization directions. Here, we have tested and analyzed the performance and memory of SQLite, compared the execution performance and memory usage of different operations, and roughly listed it here as a summary.
1. Basic Architecture
First, let's take a
Last time I introduced you to the basic information and usage process of SQLite. I believe my friends have some knowledge about SQLite. Today, I will share with you how to use SQLite in Android.
Currently, mainstream mobile devices such as Android and iPhone all use
Free Library and tool set for Android development, android class libraryA set of free class libraries and tools for Android development, which are classified by directory. Action Bars
ActionBarSherlock
Extended ActionBar
FadingActionBar
GlassActionBar
V7 appcompat library
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", 90); //Deleting RecordsScoreop.delete (wdb, "Li4"); //get a readable database operation objectSqlitedatabase RDB =dbhelper.getreadabledatabase (); //1. You can call the system-supplied query method to return the cursor object in the form of a specified parameter//cursor cursor = scoreop.query (RDB, 192); //2. SQL query statements can be executed directlycursor cursor =scoreop. Query (RDB,"Select Name,sum (point) as points from score group by name have sum (point) >=192 ORDER by name ASC limit
When an application is installed in Android, we generate a lot of data in the process of using the app, and the app has its own data, so how do we store the data?How data is storedThere are 5 ways to store your Android data: 1. Sharedpreferences Storage Data sharedpreferences data storage, also known as XML storage.This is the data stored under the "data/data/Package name/share_prefs" path to the XML file.
This article originates from: http://blog.csdn.net/dt235201314/article/details/73176149SOURCE download welcome Star (updating): Https://github.com/JinBoy23520/CoderToDeveloperByTCLerI. StatementThis week's learning content is Android storage, requirements: Database SQLite related operations, commonly used file access methods, as well as practical learning, the main learning
As a database module for Android presets, an in-depth understanding of sqlite is necessary to find some direction of optimization. The performance and memory of SQLite are tested and analyzed, and the performance and memory consumption of different operations are compared, which is a summary in this case.1. Basic ArchitectureFirst look at the main architecture of
C # How programmers learn the Android Development Series SQLite
As mentioned in the previous blog, SQLite is an embedded database, which is widely used in embedded devices due to its lightweight but powerful features. After the popularity of smartphones and tablets, as a file-type database, it became almost mandatory for the single-host database of smart devices,
Original address: http://www.cnblogs.com/wangmars/p/3914090.htmlSQLite, is a lightweight database, is widely used in a lot of embedded products, because the use of very little resources, two of the operation of the way almost and we contact the database is not much, even only hundreds of k he will naturally be favored by the demand, Let's talk about how to read and write to him in such a lightweight database.Before making a selection of contacts appear if a phone more than 2000 contacts, inserti
Tags: sqlite php lighttpdA simple voting tool has recently been implemented-a soldier's vote (hereinafter referred to as "the Software").The software is a simple web-based voting tool, implemented using Php+sqlite. This software is open source, free software.Software:Https://sourceforge.net/projects/xb-vote/files/lates
ObjectiveSQLite is a lightweight small database, although relatively small, but relatively perfect function, some common database basic functions also have, in the current embedded system using the database is much more, because it occupies little system resources. Android system is no exception, is also using SQLite, in this section to learn how to use the database in Andorid to store data, and for
The introductory guide to using the SQLite database in Android is intended to be shared with you in the following sections,
1, what is SQLite
2. Using SQLite in Android
One, what is SQLite
The Android system comes with a database called SQLite. In this article we use a demo to illustrate an example of an Android operating database.by theThe database files created by Android are stored under the/data/data/See the database file, we generally use a visual tool ca
Preface SQLite is a lightweight small database, although relatively small, but the function is comparatively perfect, some common database basic functions also have, in the current embedded system to use the database is more, because it occupies very little system resources. Android system is no exception, but also the use of SQLite, this section of the study in
Android SQLite database usage example
For a brief introduction, mainstream mobile devices such as Android and iPhone all use SQLite as the storage engine for complex data. When we develop applications for mobile devices, we may need to use SQLite to store a large amount of d
The previous blog mentions SQLite. It is an embedded database because it is lightweight but powerful and is widely used in embedded devices. Later, after the popularity of smartphones and tablets, as a file-based database, it almost became a must-have for the smart Device standalone database, which can be packaged into the APK file with the Android app.SQLite's official site is http://www.sqlite.org/, can b
Use SQLite database in android
SQLite database with its lightweight, small size and other characteristics, so that it is widely used in development, in the previous blog I also introduced the use of SQLite database in Cocos2d-x, this blog is to introduce the use of SQLite da
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