[PDF] Android-Chapter17-SQL-Databasespdf PDF

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the ontology by which the application is supported (EUPont) and some tools and libraries of Android (e.g. Room Database Data bindings)

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Example 1 Create a SQLite Database Device's memory Android's System Image. rawquery select where example code in android application is a query and then ...

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SQLiteQueryBuilder is a convenience class that helps to build SQL queries. 2.4. rawQuery() Example. The following gives an example of a rawQuery() call. Cursor

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The android application will be having its own local database (SQLite database) which will Fig 1: Example for creating SQLiteOpenHelper Class [4].

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Manual generation of SQL to create & drop tables. b. Simple setup of classes by adding annotations. c. Making native calls to Android SQLite database APIs. d.

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[PDF] Android-Chapter17-SQL-Databasespdf

An alternative way of opening/creating a SQLITE database in your local Android's data Android as: /data/data//databases/myFriendsDB2

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To create and upgrade a database in your Android application you create a subclass of the The following gives an example of a rawQuery() call

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This tutorial describes how to use the SQLite database in Android applications It also demonstrates how to use existing ContentProvider and how to define

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integrating relational database storage into Android applications using the of this example we will simply remove the old database and create a new one:

Android

Persistency: SQL Databases

Victor Matos

Cleveland State University

Notes are based on:

Android Developers

http://developer.android.com/index.html 2

17. Android -SQL DatabasesSQL Databases

Using SQL databases in Android.

Android (as well as iPhoneOS) uses an embedded standalone program calledsqlite3which can be used to: create a database, define SQL tables, indices, queries, views, triggers

Insert rows,

delete rows, change rows, run queries and administer a SQLitedatabase file. 3

17. Android -SQL DatabasesSQL Databases

Using SQLite

1.SQLiteimplements most of the SQL-92standard for SQL.

2.It has partial support for triggers and allows most complex queries

(exception made for outer joins).

3.SQLITE does not implement referential integrity constraintsthrough the

foreign keyconstraint model.

4.SQLiteuses a relaxed data typing model.

5.Instead of assigning a type to an entire column, types are assigned to

individual values. This is similar to the Varianttype in Visual Basic.

6.Therefore it is possible to insert a string into numeric column and so on.

Documentation on SQLITE available at http://www.sqlite.org/sqlite.html Good GUI tool for SQLITE available at: http://sqliteadmin.orbmu2k.de/ 4

17. Android -SQL DatabasesSQL Databases

How to create a SQLitedatabase?

Method 1

public staticSQLiteDatabase.openDatabase( Stringpath, SQLiteDatabase.CursorFactoryfactory, intflags ) Open the database according to the flags OPEN_READWRITE OPEN_READONLY CREATE_IF_NECESSARY . Sets the locale of the database to the thesystem's current locale.

Parameters

path to database file to open and/or create factoryan optional factory class that is called to instantiate a cursor when query is called, or null for default flagsto control database access mode

Returns the newly opened database

Throws SQLiteException if the database cannot be opened 5

17. Android -SQL DatabasesSQL Databases

Example 1. Create a SQLiteDatabase

packagecis493.sqldatabases; importandroid.app.Activity; importandroid.database.sqlite.*; importandroid.os.Bundle; importandroid.widget.Toast; publicclassSQLDemo1 extendsActivity {

SQLiteDatabasedb;

@Override publicvoidonCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // filePathis a complete destination of the form // "/data/data//" // "/sdcard/" try{ db= SQLiteDatabase.openDatabase( null,

SQLiteDatabase.CREATE_IF_NECESSARY);

db.close(); catch(SQLiteException e) {

Toast.makeText(this, e.getMessage(), 1).show();

}// onCreate }//class 6

17. Android -SQL DatabasesSQL Databases

Example 1. Create a SQLiteDatabase

Deǀice's memory

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[PDF] [PDF] Android-Chapter17-SQL-Databasespdf

Android

Persistency: SQL Databases

Victor Matos

Cleveland State University

Notes are based on:

Android Developers

17. Android -SQL DatabasesSQL Databases

Using SQL databases in Android.

Insert rows,

17. Android -SQL DatabasesSQL Databases

Using SQLite

1.SQLiteimplements most of the SQL-92standard for SQL.

2.It has partial support for triggers and allows most complex queries

3.SQLITE does not implement referential integrity constraintsthrough the

4.SQLiteuses a relaxed data typing model.

5.Instead of assigning a type to an entire column, types are assigned to

6.Therefore it is possible to insert a string into numeric column and so on.

17. Android -SQL DatabasesSQL Databases

How to create a SQLitedatabase?

Method 1

Parameters

Returns the newly opened database

17. Android -SQL DatabasesSQL Databases

Example 1. Create a SQLiteDatabase

SQLiteDatabasedb;

SQLiteDatabase.CREATE_IF_NECESSARY);

Toast.makeText(this, e.getMessage(), 1).show();

17. Android -SQL DatabasesSQL Databases

Example 1. Create a SQLiteDatabase

Deǀice's memory