android sqlite encryption

This article has been migrated to code quiz , you can also check this article here , please pay more attention to my new technology blog codewenda.comIn the Chinese search, did not find a better about how to use their own pre-created database in the Android application of the article, so on Google to find this article in English, according to its steps, test success. decided to translate this article roughly, want to see the original can click here: h

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

/* (Start of program header annotation)* Copyright and version Declaration of the program* Copyright (c) 2011, a student from the computer College of Yantai University* All rights reserved.* File name: Database Application-Retrieve)* Author: Lei hengxin* Completion date: January 1, August 14, 2012* Version No.: V1.0* Description of tasks and Solutions* Input description:* Problem description:* Program output:* End the comment in the program Header*/The previously used "db. rawQuery" statement ca

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

Use the existing SQLite database in the Android Program In the Chinese search, I did not find a good article about how to use the database I created in advance in the Android Application. So I found this English article on Google and followed its steps, test successful, decided to give this article a rough translation, want to see the original can click here: htt

This tutorial is dedicated to programmers who can quickly learn Android mobile phone development.Suitable for colleagues who have acquired a programming language.More like-minded, want to learn more programming technology of the Great Gods.My little brother, please pay attention to my today headline-Do the full stack siege lion.This article is based on the previous article on the basis of deep learning. Programmers take you on the creation and parsing

SQLite is a database product that will be used frequently in the software development of the Android platform, as a lightweight database, SQLite's design goal is embedded, and has been used in many embedded products, it occupies very low resources, in embedded devices, It may take only hundreds of K of memory to be enough. Now let's take a look at the use of SQLite