android sqlite tutorial

SQLite Introduction SQLite is a lightweight, embedded, and relational database. It is currently used in iPhone, Android, and other mobile phone systems. SQLite is portable, easy to use, small, efficient, and reliable. SQLite is embedded into applications that use it.Progra

Android-sqlite Commercial Database OperationsA specific data operationIncrease/*** Insert User Instance* @param puser* @return*/Public long Insertuser (User puser){if (msqlitedatabase! = NULL Puser! = null){Insert a recordContentvalues _contentvalues = new Contentvalues ();_contentvalues.put (Column_username, Puser.getmusername ());_contentvalues.put (Column_user_address, puser.getmuseraddress ());

1. SQLite 1.1 SQLite IntroductionSQLite is a lightweight database, is an acid-compliant relational database management system, the Android system has been in the framework of the use of the user-friendly statements.1.2 SQLite data typeSQLite uses dynamic data types, which are automatically judged based on the value of

In Android databases, the SQLiteOpenHelper class is inherited first. The following code is directly pasted: Public class DBHelper extends SQLiteOpenHelper {/*** @ Fields name: Database name*/Private final static String name = "info. db ";/*** @ Fields version: version Number*/Private final static int version = 1;Private Class Public DBHelper (Context context, String name, CursorFactory factory,Int version ){Super (context, name, factory, version );}P

Android contains sqlite that are commonly used in embedded systems, eliminating the effort of developers to transplant their own installations. SQLite supports most SQL92 standards, and many of the most commonly used SQL commands can be used on SQLite, and Android offers a n

If you don't talk much about it, directly add the code, and the comments in the Code are clear. Package mars.com; import android. app. activity; import android. content. contentvalues; import android. database. cursor; import android. database. SQLite. sqlitedatabase; impor

This article illustrates the way Android implements SQLite Add, update, and delete rows. Share to everyone for your reference, specific as follows: The Sqlitedatabase class exposes specific methods, such as inserts, deletes, and updates, which wrap the SQL statements required to perform these actions. However, the Execsql method allows you to execute any valid SQL statements on a database table that you wa

This article mainly records how to determine the existence of tables in the database in Android Sqlitedatabase and the basic operation of testing the Sqlitedatabase database. For a detailed description of SQLite, you can view the reproduced Android data storage--sqlite use detailedExample :androidmanifest.xml--did not

I am in the undergraduate graduation stage, graduation design to do an Android platform, for Java or small white I do have a bit of difficulty, but in the process is still a lot of harvest, now hope to put themselves in the process encountered in the various problems and friends to share, the gods do not like to spray, because the graduation design to do six months, So the next series is almost half a year to write, I try to persist.Let's get started!

: Parser.getattributevalue (int)Get Next Text: Parser.nexttext ()2. BuildGet parser:To set the output stream:To start a document:To end a document:To open a tag:End tag:To set properties:Set Text:Six. SQLite databaseFeatures of the 1.SQLite databaseThe phone comes with a database that does not differentiate between data types (except the primary key), syntax and MySQL are the same, each library is a file2.

Android provides APIs for creating and using SQLite databases (application programming Interface, Application programming Interface).In the Android system, the SQLite database is managed and manipulated mainly by the class Sqlitedatabase and Sqliteopenhelper.(i) Sqliteopenhelper class Sqliteopenhelper is a helper

Android Sqlite multi-thread access exception solution, androidsqlite Sqlite databases are frequently used when developing Android programs. This exception occurs when multiple threads access the database: java. lang. illegalStateException: Cannot perform this operation because the connection pool has been closed.Or jav

Android is using SQLite database, SQLite is a relatively lightweight database,sqlite by default when inserting data by default a statement is a transaction, how many data there are disk operations. Inserting 10,000 records at a time is about 10,000 read and write disk operations, resulting in slow speed.Workaround:Add

;Import Android.database.sqlite.SQLiteOpenHelper;/** * * @author Lin* SQLite Help class */public class Sqlite_persondb extends sqliteopenhelper{/*** SQLite Database construction method, used to define database name, database query result set, database version* Super The method of the parent class* @param context: for contexts */Public Sqlite_persondb (Context context) {Super (context, "lin_person.db", null,

[Android] mobile guard blacklist function (ListView combined with SQLite addition, deletion, and modification), androidsqlite On the modify page, add an Add button on the top horizontal bar, click to open a custom dialog box, enter the phone number and intercept mode, and save it to the database. See this http://www.cnblogs.com/taoshihan/p/5370378.html in the Custom dialog box Add record Call the show () m

Transfer from http://hi.baidu.com/hfutonline/blog/item/62b1e4de8bdf4b2e5882dd28.htmlRecently when doing Android project encountered a problem, the application initialization needs to batch to SQLite to insert a large number of numbers, causing the application to start too slow.Android using SQLite database, SQLite is a

Recently I am looking at the source code of the Android platform. Next I will summarize the relationship between sqlitedatabase and its underlying sqllite database. How does the upper-layer sqlitedatabase call the underlying SQLite database operation. Sqlitedatabase is a class used by the android framework layer to encapsulate sqllite database operations. Apps c

As a complete application, data storage operations are essential. Therefore, the android system provides four data storage methods. They are sharepreference, SQLite, content provider, and file. In Android, data is basically private and stored in the "Data/data/package name" directory. Therefore, to share data, use content provider.

Using Anko and Kotlin to develop databases on Android: SQLite is never an easy task (KAD25). ankokotlin By Antonio Leiva Time: Mar 30,201 7 Link: https://antonioleiva.com/databases-anko-kotlin/ The fact tells us that writing a database in Android is quite boring. When using SQLite, all the required templates are no

Just likeAndroid SQLiteStatement compilation and execution AnalysisAll SQL statements in SQLite must be compiled to stmt and then executed.The above article introduces SQLiteStatement compilation and execution at the android level. However, SQLiteStatement can only be used to execute SQL statements without return values or with only one row and one column (1X1), such as INSERT ALERT, the returned results su