upgrading database android

The example of this article is about the implementation of database SQL programming for Android programming. Share to everyone for your reference. The specific analysis is as follows: Install lightweight database SQLite in Android, and now test the database for basic operat

Many students have the idea of directly connected to these databases, if I say the following two questions you still want to connect directly, then I can'tA database is the most important part of a server, the most vulnerable part, and the most sensitive part.If the direct connection will cause the following problems1. Security issues, your connection database account password exposed to the client, so it i

1 in the Android Studio project, right-click the new Assets folder in the Gradle folder. Import the built SQLite database into it.2 in the main activity to determine whether the app is the first time to start the call the following method:/** Check if the app is first launched */private int checkfirstactivate () { /* Set Database transfer status */ int sets

Android uses the SQLite database to save data, the database version of the upgrade is what is going on, here to say.First, the Software v1.0Install v1.0, assuming the v1.0 version has only one account table, then go to inherit Sqliteopenhelper OnCreate, do not go onupgrade.1, v1.0 (direct installation of v1.0)Second, Software v2.0There are 2 types of installation

In the development of Android applications, transaction processing is very important when using a database.First, the operation of the Android database (especially the write operation) is very slow, and packing all the operations into one transaction can greatly improve the processing speed.The second is to ensure the consistency of the data so that all operation

Work needs to use the database for a lot of inserting work, so I want to use C to do this part of the work, after looking at the data, found an article is more practical:Method 1. Compile using the source sqlite3.h,sqlite3.c.Method 2: Compile with Android to get the libsqlite.so librarySpecific methods:1) use adb command adb pull/system/lib/libsqlite.so to get the libsqlite.so library (under the current use

I. Introduction of SQLiteGoogle for Andriod's larger data processing provides SQLite, he is in the storage, management, maintenance and other aspects of the excellent, the function is very strong. SQLite has the following features:1. LightweightWith SQLite you only need to bring a dynamic library, you can enjoy its full functionality, and the size of the dynamic library want to be small.2. IndependenceThe core engine of the SQLite database does not ne

Android.database.sqlite.SQLiteStatement.native_execute (native Method)E/database (1471): at Android.database.sqlite.SQLiteStatement.execute (sqlitestatement.java:55)E/database (1471): at Android.database.sqlite.SQLiteDatabase.insertWithOnConflict (sqlitedatabase.java:1549)Multithreaded writes, each thread uses a sqliteopenhelper, which makes each thread use a Sqlitedatabase object. Multiple threads execute

After studying the previous articles, we have already mastered the functions of Litepal's Table management module, and believe that we have realized the convenience of using Litepal to create tables, upgrade tables, and establish table associations. So from the beginning of this article, we will go into the learning journey of a new module, using Litepal to perform CRUD operations on the table. Friends who have not read the previous article suggested first refer to the

Reprint Please specify source: http://blog.csdn.net/guolin_blog/article/details/39345833After studying the previous articles, we have already mastered the functions of Litepal's Table management module very well, I believe that we have realized the convenience of using Litepal to create tables, upgrade tables, and establish table associations. So from the beginning of this article, we will go into a new module of learning journey where the Litepal is used to perform CRUD operations on the table.

Turn: http://www.open-open.com/lib/view/open1347440993944.htmlAndroid applications may inevitably deal with SQLite. With the continuous upgrading of applications, the original database structure may no longer adapt to new features. At this time, the structure of the SQLite database needs to be upgraded. SQLite provides the alter table command, allowing you to ren

Manually update settings in command line [first written by Steve Guo, please keep the mark if forwarding.] Android saved settings in a database file which is/data/COM. android. providers. settings/databases/settings. DB. for some settings, Android does not support set them on the GUI. so we need find another way to set

From http://www.bangchui.org/read.php? Tid = 7792 In Android, SQLite data pants can be used to store data, but Google does not directly provide us with tools to manage data in the database.If you cannot directly view the database using a tool, copy the database from the mobile phone or simulator and use a tool to view the