TUTORIAL ANDROID DATABASE SQLITE HOW TO

TUTORIAL ANDROID DATABASE SQLITE HOW TO

Here we will see how to use sqlite database as a storage system in android to perform CRUD operations. There are several storage options available in android like shared preferences, internal and external storage, sqlite, etc. SQLiteDatabase db = this.getReadableDatabase() Ĭursor cursor = db. This article is about android sqlite database tutorial. String countQuery = 'SELECT * FROM ' + TABLE_CONTACTS Public class DatabaseHandler extends SQLiteOpenHelper ) Let's see the simple example of android sqlite database.

Int update(String table, ContentValues values, String whereClause, String whereArgs)Ĭursor query(String table, String columns, String selection, String selectionArgs, String groupBy, String having, String orderBy) The third argument specifies the values to be stored. If second argument is null, android will store null values if values are empty. The table specifies the table name, nullColumnHack doesn't allow completely null values. Long insert(String table, String nullColumnHack, ContentValues values) There are many methods in SQLiteDatabase class. It contains methods to be performed on sqlite database such as create, update, delete, select etc. Public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion)Ĭalled when database needs to be downgraded. Public abstract void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion)Ĭalled when database needs to be upgraded. Public abstract void onCreate(SQLiteDatabase db)Ĭalled only once when database is created for the first time. There are many methods in SQLiteOpenHelper class. SQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version, DatabaseErrorHandler errorHandler)Ĭreates an object for creating, opening and managing the database. SQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version)Ĭreates an object for creating, opening and managing the database. There are two constructors of SQLiteOpenHelper class. SQLite is a library that provides a DBMS, based on SQL. For performing any database operation, you have to provide the implementation of onCreate() and onUpgrade() methods of SQLiteOpenHelper class. The default database management system (DBMS) that Android uses is called SQLite. The class is used for database creation and version management. SQLiteOpenHelper class provides the functionality to use the SQLite database. For displaying data on the spinner or listview, move to the next page.

Here, we are going to see the example of sqlite to store and fetch the data. So, there is no need to perform any database setup or administration task. used to perform database operations on android devices such as storing, manipulating or retrieving persistent data from the database. SQLite is an open-source relational database i.e.

Tutorial android database sqlite