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Android-use SQLiteDatabase to operate SQLite DatabasesIn addition to using files or SharedPreferences to store data, you can also choose to use the SQLite database to store data. On the Android platform, an embedded relational database-SQLite is integrated. SQLite3 supports
SQLite database with its light weight, small size and so on, so that its application in the development of a very wide, in the previous blog I also introduced in Cocos2d-x in the use of SQLite database, this blog is to introduce the use of the SQLite database in Android, The SQLite
' , (+), (2, U ' test2 ', U ' 124 '), (3, U ' test3 ', U ' 124 ', 20)] Below, we encapsulate the sqlite operation in Python into a class, as follows:Class Sqlitehelper: def __init__ (self, db): self.db = db try: self.conn = sqlite.connect (db) Self.cur = Self.conn.cursor () except SQLite. Error,e: print ("Connect" +db+ "failed:" +e.reason)
timeOnopen (sqlitedatabase dB) voidOnupgrade (sqlitedatabase dB, int oldversion, int newversion) Abstract void upgrade DatabaseClose () synchronized void close all opened database objects Example:Databasehelper class: Package qyq. sqlitetest. dB; Import Android. content. context;Import Android. database. SQLite. sqlitedatabase;Import
From (http://www.reigndesign.com/blog/using-your-own-sqlite-database-in-android-applications/comment-page-2/#comment-12368) Most all of the android examples and tutorials out there assume you want to create and populate your database at runtime and not to use and access an independent, preloaded database with your android
I. OverviewSQLite is one of the core data storage services of Android system, it is a lightweight embedded database, it occupies very little resources but can provide very fast data access service, many large-scale Android projects that need data storage are useful to SQLite (also can be used for desktop applications).The following describes the creation of
The original address of this article is: http://blog.csdn.net/horkychen/article/details/18892223About The optimization of SQLite, the first is to be able to use the SQL Statement batch processing, do not single-stroke operation, theCursor is more can not use. For example, in batches of delete/update, it ismuch more efficient to assemble the conditions into SQL statements than to use CURSOR strips (a stored procedure was used instead of a single pen o
I. Use an embedded relational SQLite database to store data The Android platform integrates an embedded relational database named SQLite. SQLite3 supports NULL, INTEGER, REAL (floating point number), TEXT (string TEXT), and BLOB (binary object) data types, although it supports only five types, sqlite3 actually accepts data types such as varchar (n), char (n), dec
1. Features Compared with other data types. It can store any type, except the primary key. If the primary key is Integer primary key, only 64-bit integers can be stored. 1) the following statement can be used to create table: Create Table person (personid integer primary key autocrement, name varchar (20 )) We recommend that you write varchar (20) later. 2) Get the id value after auto-increment: Select last_insert_rowid () Case: 1. Create a database Sqliteopenhelper. getreadabledatabase () or
Secret of Android database experts (1) -- SQLite command To be proficient in operating any database, the most basic requirement is to understand the SQL language, which is also a skill that every programmer should master. Although SQL is profound and profound, it is really difficult to be proficient, but you still have to learn the most basic table creation commands, addition, deletion, modification, and q
Added, deleted, and queried data. Bind the spinner control and the listview control to click the delete list option. Package COM. example. splite; import Java. util. arraylist; import Java. util. list; import android. content. contentvalues; import android. content. context; import android. database. cursor; import android
(1)SQLite database Let's start with a brief introduction to the SQLite database:the year was released by D.richard Hipp . is a lightweight, open source embedded relational database that occupies very low resources. Currently used in many embedded products, in embedded devices,SQLite may only need hundreds of K of memory is enough. Compared to the Two open source
Background: SQLite is a very popular embedded database. It provides a refreshing SQL interface, a relatively small memory usage and high-speed response. Even more Happy, it is still free of charge, you can use it as much as you like. Many companies (such as Adobe, Apple, Google, Sun, and Symbian) and open-source projects (Mozilla, PHP, and Python) all assemble SQLite in the product. In
In the development of the project, we will use the database more or less. In Android, we generally use SQLite, because Android in the Android.database.sqlite package encapsulates many of the SQLite operating APIs. I wrote a demo to summarize the use of SQLite, hosted on GitH
Android directly reads the sqlite database in the project, androidsqlite To read sqlite database files for android in a recent project, here is an example of an English-Chinese dictionary. It is mainly used to input English to the database to query the corresponding Chinese meaning and output the answer. The database u
Because the project requires a download management module, we have been studying the implementation of File Download recently, and have finally finished it through continuous efforts! In File Download management, we need to save the file information, including the file size, file name, and type. Now we need to use the database. The android system provides us with a lightweight database SQLite. For how to us
The operation of data is often involved in Android development. Android itself provides four ways of storing data. Includes:sharepreference,sqlite,content provider,file.In Android, data is private, and the correct way to achieve data sharing is to use content Provider.SQLite: SQLit
occurs,Use putenv ("TMP = C:/temp"); to specify a temporary folder. For details, see the code: ";}; // Close the database sqlite_close ($ db) ;}else {print $ sqliteerror ;}?> PHP + SQLite database operation tutorial and example ';} Else {echo' successfully connected the SQlite file: ', $ db_name ,'';} // CREATE a data TABLE: MD5 password TABLE sqlite_query (
Prior to learning Oracle, simply that the database exists only on the server side, learning Android only to find that Android and iOS themselves are "carry" the database--sqlite, is a lightweight, embedded, relational database, is Android, A widely used database system such as iOS. Used to store the local state. Just w
---------------------------------------------. JavaPackage com. example. sqlite;Import android. app. Activity;Import android. database. sqlite. SQLiteDatabase;Import android. OS. Bundle;Import android. view. Menu;Import
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