The database has over a half-dozen tables totalling over a gig. I have written a data-intensive program in VB6 using databases/tables created in Access2007. When we initialize the SQL object we pass the path to a database file (which can be created if needed). SQLite stores the database in a single file. This way it will be kept alive when the activity is recreated. Usually you will want to declare the SQL object as a process global object. The Cursor object allows you to process queries results. This is done by going to the Libraries tab and checking SQL.Īn SQL object gives you access to the database. The first step is to add a reference to the SQL library.
SQLite data types: Datatypes In SQLite Version 3 SQL in Basic4android SQLite syntax: Query Language Understood by SQLite The following two links cover important information regarding SQLite. It contains methods for common tasks which you can use and also learn from the code.Īndroid uses SQLite which is an open source SQL implementation.Įach implementation has some nuances.
#Basic4android sqlite tutorial code
SQL IntroductionĪ new code module is available named DBUtils. If you are not familiar with SQL it is recommended to start with such a tutorial. There are many general SQL tutorials that cover the actual SQL language. Import 7.app.This tutorial covers the SQL library and its usage with Basic4android. SQLiteDatabase db = this.getReadableDatabase() Ĭursor cursor = db.rawQuery(countQuery, null) String countQuery = "SELECT * FROM " + TABLE_CONTACTS Public class DatabaseHandler extends SQLiteOpenHelper )
#Basic4android sqlite tutorial android
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.
For performing any database operation, you have to provide the implementation of onCreate() and onUpgrade() methods of SQLiteOpenHelper class. 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.
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