SQLITE Android,Android Database,Mobile Database

1. SQLite
1
Sourabh Sahu

2. SQLite

Created by D. Richard Hipp

Offline Applications

Permanent Storage

SQLite tools

Small Size around 0.5 MB

Entire database in a single file

3. • Used In Stand alone applications
• Local database cache
• Embedded devices
• Internal or temporary databases
• Application file format
• Server less applications

4. • NULL – null value
• INTEGER - signed integer, stored in 1, 2, 3, 4, 6, or 8
bytes depending on the magnitude of the value
• REAL - a floating point value, 8-byte IEEE floating point
number.
• TEXT - text string, stored using the database encoding
(UTF-8, UTF-16BE or UTF-16LE).
• BLOB. The value is a blob of data, stored exactly as it was
input.
Column Data Type

5. SQLite Classes
• SQLiteCloseable - An object created from a SQLiteDatabase that can be
closed.
• SQLiteCursor - A Cursor implementation that exposes results from a query
on a SQLiteDatabase.
• SQLiteDatabase - Exposes methods to manage a SQLite database.
• SQLiteOpenHelper - A helper class to manage database creation and
version management.
• SQLiteProgram - A base class for compiled SQLite programs.
• SQLiteQuery - A SQLite program that represents a query that reads the
resulting rows into a CursorWindow.
• SQLiteQueryBuilder - a convenience class that helps build SQL queries to
be sent to SQLiteDatabase objects.
• SQLiteStatement - A pre-compiled statement against a SQLiteDatabase
that can be reused.

6. SQLiteDatabase
• Contains the methods for: creating, opening,
closing, inserting, updating, deleting and quering
an SQLite database
• These methods are similar to JDBC but more
method oriented than what we see with JDBC
(remember there is not a RDBMS server running)
• SQLiteDatabase db;
• db= openOrCreateDatabase
("my_sqlite_database.db" ,
SQLiteDatabase.CREATE_IF_NECESSARY , null);

7. CREATE
• Create a static string containing the SQLite
CREATE statement, use the execSQL( ) method
to execute it.
• String studentcreate= "CREAT TABLE students(
id INTEGER PRIMARY KEY AUTOINCREMENT,
fname TEXT, lname TEXT,age INTEGER,mob
TEXT
• );
• db.execSQL(studentcreate);

8. ContentValues values = new ContentValues( );
• values.put("firstname" , “Ram");
• values.put("lastname" , “Sharma");
• values.put(“age" , “13");
values.put(“mob" , “9479864026");
• long id = myDatabase.insert(“students" , "" ,
values);
INSERT

9. Update
• public void updateFNameTitle(Integer id, String
newName) {
• ContentValues values = new ContentValues();
• values.put(“fname" , newName);
• myDatabase.update(“students" , values ,
• "id=?" , new String[ ] {id.toString() } );
• }

10. DELETE
• public void deleteStudents(Integer id) {
• myDatabase.delete(“students" , "id=?"
,
• new String[ ] { id.toString( ) } ) ;
• }

11. SELECT
• SQL - "SELECT * FROM Students;"
Cursor c =db.query(students,null,null,null,null,null,null);
• SQL - "SELECT * FROM Students WHERE id=5"
Cursor c = db.query(Students ,null,“id=?" , new String[ ]
{"5"},null,null,null);
• SQL – "SELECT fname,id FROM Students ORDER BY fname
ASC"
SQLite – String colsToReturn [ ] {“fname","id"};
String sortOrder = “fname ASC";
Cursor c = db.query(“Students",colsToReturn,
null,null,null,null,sortOrder);

12. How to Do it
Create a class DataBaseHelper

13. DEFINE FEILDS

14. CREATE STATEMENT

15. CREATE
POJO

16. Adding Student from Table
• // Adding new Student
void addStudent(Student s) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_F_NAME, s.getfName()); // Name
values.put(KEY_L_NAME, s.getlName()); //
values.put(KEY_MOB, s.getMob());
values.put(KEY_AGE, s.getAge());
// Inserting Row
db.insert(TABLE_STUDENTS, null, values);
db.close(); // Closing database connection
}

17. Getting Student from Table
•
//int id, String fName, String lName, String mob, int age
// Getting single contact
Student getStudent(int id) {
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.query(TABLE_STUDENTS, new String[] { KEY_ID,
KEY_F_NAME,KEY_L_NAME,KEY_MOB,KEY_MOB }, KEY_ID +
"=?",
new String[] { String.valueOf(id) }, null, null, null, null);
if (cursor != null)
cursor.moveToFirst();
Student s1 = new Student(
Integer.parseInt(cursor.getString(0)),
cursor.getString(1),
cursor.getString(2),cursor.getString(3),Integer.parseInt(cursor.getString(4)));
// return contact
return s1;
}

18. Getting All Student List
• // Getting All Contacts
public List<Student> getAllStudents() {
List<Student> studentList = new ArrayList<Student>();
// Select All Query
String selectQuery = "SELECT * FROM " + TABLE_STUDENTS;
SQLiteDatabase db = this.getWritableDatabase();
Cursor cursor = db.rawQuery(selectQuery, null);
// looping through all rows and adding to list
if (cursor.moveToFirst()) {
do {
Student s1 = new Student(
Integer.parseInt(cursor.getString(0)),
cursor.getString(1),
cursor.getString(2),cursor.getString(3),Integer.parseInt(cursor.getString(4)));
studentList.add(s1);
} while (cursor.moveToNext());
}
// return contact list
return studentList;
}

19. Update
•
// Updating single Student
public int updateStudent(Student student) {
SQLiteDatabase db = this.getWritableDatabase();
ContentValues values = new ContentValues();
values.put(KEY_F_NAME, student.getfName());
values.put(KEY_L_NAME, student.getlName());
values.put(KEY_MOB, student.getMob());
values.put(KEY_AGE, student.getAge());
// updating row
return db.update(TABLE_STUDENTS, values, KEY_ID
+ " = ?",
new String[] { String.valueOf(student.getId()) });
}

20. Deletion and count
// Deleting single Student
public void deleteStudent(Student contact) {
SQLiteDatabase db = this.getWritableDatabase();
db.delete(TABLE_STUDENTS, KEY_ID + " = ?",
new String[]
{ String.valueOf(contact.getId()) });
db.close();
}
// Getting contacts Count
public int getStudentCount() {
String countQuery = "SELECT * FROM " +
TABLE_STUDENTS;
SQLiteDatabase db = this.getReadableDatabase();
Cursor cursor = db.rawQuery(countQuery, null);
cursor.close();
// return count
return cursor.getCount();

21. Coding on Activity Side

22. Thank You
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