![]() ![]() This last method provides a structured interface for specifying a SQL query. In addition, it lets you to make queries via rawQuery() to queries made directly in SQL or via query() method. It exposes several methods to interact with database like insert(), update() or delete(). SQLiteDatabase is the class used to communicate with a SQLite database. In this method you can manage the migration process between two databases versions.īoth methods get and SQLiteDatabase instance in parameter which is the way to communicate with the database.įurthermore, SQLiteOpenHelper provides 2 methods to get access to an SQLiteDatabase instance object respectively in read and in write modes : onUpgrade() called when you choose to increment the version number of the database.onCreate() that is called when database is accessed but not yet created.You need also to override the following methods : In the constructor of your subclass you call the super() method of SQLiteOpenHelper, specifying the database name and the current database version. When you want to work with a SQLite database in Android, you must extend SQLiteOpenHelper class. SQLiteDatabase that is the base class for working with a SQLite database in Android.SQLiteOpenHelper that is an helper class to extend to manage database operations.SQLite API is centered around 2 main classes : The package contains the SQLite specific classes. Īll classes needed to manage databases in Android SDK are contained in the package android.database. When an application creates and uses a SQLite database, it will be saved by default in the directory : DATA/data/APP_PACKAGE/databases/FILENAME. ![]() To avoid ANR (Application Not Responding) errors, it’s recommended to perform database operations asynchronously. Access to an SQLite database involves accessing the file system. The only job that developers must make is to define SQL tables and statements for creating and updating data. SQLite is embedded in standard and each application can have its SQLite database. Biggest advantage of SQLite integration to Android OS is the fact that there is no need to to setup the database. In standard, Android SDK comes with a SQLite implementation. One solution is to use a relational database to persist data and then to be able to query easily these data. On Android, there are several solutions to persist data between users’ sessions. Learn to save data with SQLite on Android
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