upgrading database android

Test an Android program that reads an sqlite database mydb. After I perform the following operations, the getWritableDatabase method of SQLiteOpenHelper is different. Test an Android program that reads an sqlite database mydb. After I perform the following operations, the getWritableDatabase method of SQLiteOpenHelper

When it comes to Android applications, the database is inevitably used. But when we deploy the app's apk to the real machine, the database that has been created and the data inside it cannot be installed on the real machine with the APK.(PS: This blog solves a problem of a small game written in my previous blog, but also can read the

In Android development, if you use a database to store data, it is inevitable to look at the contents of the database, but for the root of the real machine, it is not so easy to view the database, if only to view the database and then put the phone root, a little more than t

I. Greendao Overview: Greendao is an ORM solution that can help Android developers quickly map Java objects to SQLite database forms. Greendao characteristics of the most efficient operation, the least memory consumption, official website: http://greendao-orm.com/... GitHub: Https://github.com/greenrobot/greenDAO.1, Daocore:greendao Core Library.2, Daoexample:greendao use the sample project.3. Daoexamplege

Problems with Cocos porting to Android-SQLite3 database migrationFirst, we will discuss the problem of migrating the SQLite3 database. In section 14th, we introduced the use of the SQLite3 database on the Win32 platform, and we introduced two ways to configure the environment: one is to use the SQLite3 library configur

Android SQLite database BASICS (1 continued), androidsqlite Supplementary note, in the previous article, I have joined the following content, have not read the first article, you can directly read the first article can be (http://www.cnblogs.com/flylin/p/qq_980542577.html ). Read this article. Create a test class to test whether the Code mentioned in the previous article is correct: Add the following code

The simplest and most convenient way to manage a MySQL database is the php script.Run the PHP script using the HTTP protocol and the Android system connection.We encode the data in JSON format because both Android and PHP have ready-made JSON functions.The following sample code, which reads data from a database accordi

Transferred from: http://c.colabug.com/thread-1781696-1-1.html Prior to the Eclipse era, debugging SQLite was to export the database files to a computer and then open the view with the software. Now that we are using Android Studio, is there a more convenient way?SqlscoutinstallationSqlscout is a plugin for Android Studio, by clicking on:Setting-> pl

InstallationSqlscout is a plugin for Android Studio, by clicking on:Setting —> Plugings —> Browse Repositories 1 Search Sqlscout installation. If the download does not move, you can go to here download, then click Install Plugin from disk to import. LoadAfter successful installation restart Android Studio, you will find the right side bar appears SQLite Exporer, expand and click "+" w

[] Selectionargs, String groupBy, String having, string-by-clause, string limit) queries the specified data table to return a data set with a cursor (cursor) rawquery (String SQL, string[] Selectionargs) runs a preset SQL statement that returns a data set with a cursor (the biggest difference from the above statement is the prevention of SQL injection) the data query data query is more complex than the previous methods. Because the query will have many criteria for querying through query public

1. IndexIn short, the index is like a book directory, where you can quickly find the page number. The index in the database can help you quickly find the data without scanning the entire table, appropriate indexes can greatly improve the efficiency of database queries.(1). AdvantagesThis greatly accelerates database retrieval, including single-table queries, conn

Ext.: http://ios.jobbole.com/85041/Mobile Database new King: Realm2016/05/14 ·iOS Development · Databaseshare to:0 Original source: No story of the Zhuo classmate (@ No story of Zhuo students)About RealmRealm is a cross-platform mobile database engine that supports iOS, OS X (Objective). C and Swift) as well as Android.Released July 2014. The pioneering team, incubated by YCombinator, was the first

Android CREATE Database call Sqliteopenhelper, generally do not directly operate Sqlitedatabase . is through Sqliteopenhelper to getpublic class Dbopenhelper extends Sqliteopenhelper {private static final int version = 1;//defines the database versionprivate static final String PATH = Environment. getExternalStorageDirectory (). GetPath ();Some don't have an SD