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Android embedded SQLite database Chinese WORD version

This document mainly talks about the Android embedded SQLite database; a relational database SQLite is embedded in the Android platform. Unlike other databases, SQLite does not distinguish types when storing data; interested friends can come and take a look.

2024-02-28 0 1061
Android cooperates with WebService to access remote database Chinese WORD version

Use HttpClient to request data from the server-side action. Of course, calling server-side methods to obtain data is not the only one. WebService can also provide us with the required data, so what is webService? , it is a remote calling standard based on the SAOP protocol. Different operating system platforms, different languages, and different technologies can be integrated through webservice. To realize Android and server-side data interaction, we need some libraries in the PC machine Java client, such as XFire, A

2024-02-26 0 903
Android local data storage Chinese WORD version

This document is primarily about Android local data storage; the ability to store data locally on a mobile device is a critical feature for applications that need to maintain important information across the execution or lifetime of the application. As a developer, you often need to store information such as user preferences or application configurations. You must also decide based on characteristics such as access visibility whether you need to involve internal or external memory, or whether you need to deal with more complex, structured data types. Follow this article to learn the Android data storage API with

2024-02-26 0 808
Detailed guide to creating and using databases in Android Chinese WORD version

Every application uses data, and Android applications are no exception. Android uses an open source, operating system-independent SQL database--SQLite. This article introduces how to create and operate a SQLite database for your Android application. Database supports the lifeline of every application no matter how big or small. Unless your application only handles simple data, then you need a database system to store your structured data. Android uses SQLite database, which is an open source and supports multiple operating systems. SQ

2024-02-28 0 504
Usage examples of Android database SQLite Chinese WORD version

Android provides three data storage methods, the first is file storage; the second is SharedPreferences storage; and the third is database SQLiteDatabase storage. I don’t need to say more about file storage, but SharedPreferences can access simple data (int, double, float.etc). It is often used for data caching because it is simple to read and store. For details, please refer to this series. Advanced Tutorial for Android Experts (7) - Android Medium

2024-02-29 0 930
Detailed explanation of UML class diagram Chinese WORD version

This document mainly talks about the detailed explanation of UML class diagram; in the static mechanism of UML, class diagram is a key point. It is not only the core concern of designers, but also the core concern of implementers. Modeling tools also generate code primarily based on class diagrams. Class diagram occupies a very important position among the 9 diagrams of UML. I hope this document will help friends in need; interested friends can come and take a look.

2024-02-29 1 1245
Hive permission control Chinese WORD version

Hive can control permissions through metadata from version 0.10 (including version 0.10) onwards. In versions before Hive-0.10, permissions are mainly controlled through Linux users and user groups. CREATE, SELECT, and DROP of Hive tables cannot be controlled. Of course, Hive's control of permissions based on metadata is not completely safe. The purpose is to prevent users from accidentally doing operations they shouldn't do. Interested friends can come and take a look

2024-02-03 0 1432
SQLite syntax and Android database operations Chinese WORD version

This document mainly talks about SQLite syntax and Android database operations; Android's SQLiteDatabase does not originally depend on Android, but exists independently as an individual, with its own unique system and language, and this is SQL syntax . SQLite is a lightweight database with few functions for large databases, so you only need to learn some common SQL syntax to easily master it, and these SQL syntaxes are basically unchanged for other databases. needed

2024-02-27 0 563
Delphi2006 tutorial DbExpress efficient database development chm version

When the author decided to update this book, it was hard to believe that nearly 4 years had passed from Delphi 7 to Delphi 2006. During this time, Borland's database access technology has also undergone considerable changes. First let's introduce the subject of this book: dbExpress. dbExpress has developed from version 2.0 of Delphi 7 to version 3.0 of Delphi 2006. In addition to updating support for the latest versions of various databases, the more important progress lies in the continuous improvement of execution efficiency and the improvement of Win32

2024-01-19 0 723
Tutorial on using SQLite database in Android development chm version

Tutorial on Android development using SQLite database, chm format. SQLite is a very popular embedded database that supports SQL queries and uses only a small amount of memory. Android integrates SQLite at runtime, so every Android application can use a SQLite database. For developers familiar with SQL, using SQLite is fairly simple. Yes, since JDBC is not suitable for memory-constrained devices such as mobile phones, Android

2024-02-28 0 1067
JSON introductory tutorial Chinese WORD version

This document mainly talks about the introductory tutorial of JSON; like XML, JSON is also a data format based on plain text. Since JSON is inherently prepared for JavaScript, the data format of JSON is very simple. You can use JSON to transmit a simple String, Number, Boolean, an array, or a complex Object. I hope this document will help friends in need; interested friends can come and take a look.

2024-02-03 3 1743
mybatis syntax and introduction Chinese WORD version

This document mainly talks about the syntax and introduction of mybatis; MyBatis is a persistence layer framework that can customize SQL, stored procedures and advanced mapping. MyBatis eliminates most of the JDBC code, manual setting of parameters and result set retrieval. MyBatis only uses simple XML and annotations to configure and map basic data types, Map interfaces and POJOs to database records. Compared with "one-stop" ORM solutions such as Hibernate and Apache OJB

2024-01-31 2 1125
Simple usage of JSON Chinese WORD version

This document mainly talks about the simple usage of JSON; JSON (JavaScript Object Notation) is a simple data format that is more lightweight than xml. JSON is a native JavaScript format, which means that processing JSON data in JavaScript does not require any special API or toolkit. I hope this document will help friends in need; interested friends can come and take a look.

2024-02-01 0 953
Delphi classic programming introduction chm version

Delphi is a new visual programming environment that provides us with a convenient and fast Windows application development tool. It uses many advanced features and design ideas of the Microsoft Windows graphical user interface, adopts a flexible and reusable complete object-oriented programming language (Object-Oriented Language), the fastest editor in the world today, and the most leading database technology . For the majority of program developers, using Delphi to develop application software will undoubtedly greatly improve programming efficiency.

2024-01-17 2 1263
Big data processing with Apache Spark

This document mainly talks about using Apache Spark for big data processing - Part 1: Getting Started; Apache Spark is a big data processing framework built around speed, ease of use and complex analysis. It was originally developed by AMPLab at the University of California, Berkeley, in 2009, and became one of Apache's open source projects in 2010. In this first part of the Apache Spark article series, we will learn what Spark is, how it differs from typical Map

2024-01-29 0 985
Android SurfaceView usage summary Chinese WORD version

This document mainly talks about the summary of the use of SurfaceView in Android; SurfaceView is a subclass of the View class. It can obtain image data directly from memory or DMA and other hardware interfaces. It is a very important drawing view. I hope this document will help friends in need; interested friends can come and take a look.

2024-02-27 2 2175
Quickly get started with Android database operations Chinese WORD version

Android uses the relational database SQLite3, which is a lightweight embedded database that supports SQL and is widely used in embedded operating systems. WM also uses SQLite3; more details about the principles and principles are in this article I won’t mention it, but if you want to quickly learn to operate SQLite3, then this is the article you are looking for! Interested friends can come and take a look

2024-02-28 0 909
abaqus Python example

This document mainly talks about the abaqus Python example - operating excel files; currently processing data cannot be done without excel, so pythoners must learn to use python to operate excel tables. There are also many ways to interact between Python and excel; friends in need can download it and take a look

2024-01-25 0 531
[Top] Detailed summary of JSON in Android Chinese WORD version

JSON (JavaScript Object Notation) Definition: A lightweight data exchange format that is highly readable and easy to write quickly. The mainstream technology in the industry provides a complete solution (somewhat similar to regular expressions, supported by most languages today), so that data can be exchanged between different platforms. JSON adopts a highly compatible text format and also has behavior similar to the C language system. Friends in need can download and take a look

2024-02-26 0 926
fortran language grammar WORD version

This document mainly talks about the syntax of the fortran language; FORTRAN is the earliest high-level programming language in the world and the most commonly used programming language in the engineering community. It is used in scientific computing (such as aerospace, geological exploration, weather forecasting, construction engineering and other fields ) plays an extremely important role. After more than 40 years of development, with the updates of multiple versions of the FORTRAN language and the emergence of corresponding development systems, its functions have been continuously improved. The latest version of the development system has almost all the features of VC and VB, such as graphical interface programming, databases, etc. I hope this document will help friends in need

2024-02-03 0 1239