android sqlite tutorial

I have explained how to use the execsql () and rawquery () methods in SQLite in Android to implement curd operations. However, these operations are performed when we are very familiar with SQLite, however, sometimes we cannot avoid having different operation habits and may provide more convenient operation procedures for beginners during the operation. Therefore,

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

Recently, when I was working on an android project, I encountered a problem: ApplicationProgramDuring initialization, You need to insert a large number of data into SQLite in batches, resulting in slow application startup. Android uses the SQLite database, while SQLite is a

SQLite lightweight database is mainly used for embedded systems. It only occupies hundreds of K of system resources and has the following features: lightweight: you only need a dynamic library to enjoy all the functions, in addition, the dynamic library size is also very small and independent: the Core Engine does not need to rely on third-party software isolation: All database information (tables, views, triggers) is stored in the same file cross-pla

"Basic Knowledge"SQLite: A small database, suitable for use in Android systems.CD (Andorid debug Bridge): Android Debugging tool, run on DOS interface. Android SDK (software Development Kit): Android software Development Kit. It has to be installed and is usually install

1. Create a subclass of sqliteopenhelper. Package COM. tao. sqlitedb; import android. content. context; import android. database. SQLite. sqlitedatabase; import android. database. SQLite. sqliteopenhelper; public class dbopenhelper extends sqliteopenhelper {Private Static s

In the Android development process, often to use SQLite to store some data, this application should be more common, but sometimes unavoidably inadvertently, will appear sqlite create table success, insert not error, but no data inserted.For specific questions, see the following code:Context CTX;Sqlitedatabase db = Dbopenhelper.getwritabledatabase ();Open transact

SQLite database storage: SQLite is a lightweight relational database, it is very fast operation, the use of small resources, usually only need hundreds of K of memory is sufficient, and therefore particularly suitable for mobile devices.First:Create a database. (Android is designed to make it easier for us to manage databases, providing a Sqliteopenhelper helper

As an Android app, you will inevitably deal with SQLite. With the continuous upgrading of the application, the original database structure may no longer adapt to the new features, this time, you need to upgrade the structure of the SQLite database. SQLite provides the ALTER TABLE command, which allows the user to renam

MainActivity is as follows: Package cn.com; import java. io. byteArrayOutputStream; import java. io. inputStream; import java.net. httpURLConnection; import java.net. URL; import cn. db. DBservice; import cn. db. photo; import android. app. activity; import android. graphics. bitmap; import android. graphics. bitmapFactory; import

();// transaction has been executed successfully}catch ( exceptione) {e.printstacktrace ();} finally{db.endtransaction ();// End Transaction}}); The above code is the standard use of transactions in Android, first call Sqlitedatabase's BeginTransaction () method to open a transaction, and then in an exception-caught code block to perform specific database operations, when all the operations are completed, call Settransactionsuccessful () indicates th

Application of SQLite in Android and sqliteandroid Android provides the Application Programming Interface (Application Programming Interface) for creating and using SQLite databases ). In the Android system, the SQLite database is

Android SQLite-related java source code has repeatedly mentioned support for nested transaction. SQLite itself does not support nested transactions and can only be replaced by savepoint. Nested transactions are similar BEGIN BEGIN ...... Not many people may write this statement directly. In more cases, one program calls other programs while others have t

-rav1.0g.imgadb shell flash_image recovery/sdcard/recovery-rav1.0g.img reboot　　　　　　re-mount file system: ADB remountRestart your phone: adb reboot　　　　Manipulating databases with ADB directivesLearn about SQLite data types first　　　　　　　　　　　　　　　　　　Perform ADB shell operations into your Android operating systemExecute the following command: Sqlite3 settings.db　　　　　　　　　　　Get help:.　　　　　　　　　　　Create a tableAdd da

(60), m varchar (60), a varchar (60) ") ;}@ Override public void onUpgrade (SQLiteDatabase db, int oldVersion, int newVersion) {Log. e ("DBOpenHelper", "onUpgradeonUpgradeonUpgradeonUpgrade"); db.exe cSQL ("drop table if exists config"); db.exe cSQL ("drop table if exists application "); db.exe cSQL ("drop table if exists install"); db.exe cSQL ("drop table if exists smslist"); onCreate (db );}} Using transactions to insert multiple data records in a database improves efficiency: During appli

To the new year, recently more busy finishing the previous code.The SQLite ORM Library, written in 14, was written in order to familiarize itself with the Android database operations as soon as possible. Then use this library to develop a few projects found with or relatively handy, so write a blog record it.I understand the core idea of ORM is to use the object as a unit for the increase and deletion of th

After you create a new project in Eclipse, you will default to a assets directory, copy the prepared SQLite database directly to the directory in Eclipse, and then encode it in the main activity: Package com.test.db; Import Java.io.File; Import Java.io.FileOutputStream; Import Java.io.InputStream; Import Java.io.OutputStream; Import java.io.UnsupportedEncodingException; Import android.app.Activity; Import Android.database.Cursor; Import Androi

Teddy Norway 20000.04 Mark rich-mond 65000.05 David Texas 85000.06 Kim south-hall 45000.07 James Houston 10000.0　　Use one table to populate another tableYou can populate data into another table by using a SELECT statement on a table that has a set of fields. Here's the syntax:INSERT into First_table_name [(Column1, Column2, ... columnn)] SELECT column1, Column2, ... columnn from

Details about features and concepts of the SQLite database in android!2. Database Operation Process[Usage conditions] Prepare a DATABASE system (MySQL) --> Create a DATABASE --> Create/design a TABLE --> Data Operations[Data operations] Connection --> prepare SQL statements (String SQL) --> Execute SQL statements (Statement/PreparedStatement) --> processing result (int/ResultSet)3. Use SQLite1) Create a dat

In view of the frequent use of Sqlite database for data persistence, a little encapsulation, easy to use.This package class mainly supports the function Supports multi-user data storage Support for SQLite database upgrade Support for incoming SQL statement build table Support Sqlitedatabase basic operation. For example: Execsql, rawquery, insert, etc. Resolves a database concurrency