#ANDROID STUDIO SQLITE DATABASE TUTORIAL INSTALL#
#ANDROID STUDIO SQLITE DATABASE TUTORIAL UPDATE#

Long insert(String table, String nullColumnHack, ContentValues values) To execute the sql query not select query. Some of the important methods of the SQLiteDatabase class are: Method The SQLiteDatabase class has many methods. The methods like create, update, delete, select, etc, that are performed on the SQLite database are included in the SQLiteDatabase class. To be called when the database needs to be downgraded. Public void onDowngrade(SQLiteDatabase db, int oldVersion, int newVersion) To be called when the database needs to be upgraded. Public abstract void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) To be called when the database is created for the first time. Public abstract void onCreate(SQLiteDatabase db) Some of the important methods of the SQLiteOpenHelper class are: Method The SQLiteOpenHelper class has many methods. To create an object that can create, open and manage the database, and to also specify the error handler. SQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version, DatabaseErrorHandler errorHandler) To create an object that can create, open and manage the database. SQLiteOpenHelper(Context context, String name, SQLiteDatabase.CursorFactory factory, int version) The SQLiteOpenHelper class has two constructors. The implementation of onCreate() and onUpgrade() methods of SQLiteOpenHelper class is required to be provided to perform any database operation. Import functionality to use the SQLite database is provided by the class which is used for database creation and version management.

#ANDROID STUDIO SQLITE DATABASE TUTORIAL INSTALL#

Run the application and choose a running android device and install the application on it and verify the results.įollowing is the content of the modified MainActivity.java.

Modify the res/menu/display_contact.xml to add necessary menu componentsĬreate a new menu as res/menu/mainmenu.xml to add the insert contact option Modify the res/values/string.xml to add necessary string components Modify the res/layout/activity_display_contact.xml to add respective XML components Modify the res/layout/activity_main to add respective XML components Modify src/MainActivity.java file to get references of all the XML components and populate the contacts on listView.Ĭreate new src/DBHelper.java that will manage the database workĬreate a new Activity as Displa圜ontact.java that will display the contact on the screen You will use Android studio to create an Android application under a package. To experiment with this example, you need to run this on an actual device on which camera is supported. It creates a basic contacts applications that allows insertion, deletion and modification of contacts. Here is an example demonstrating the use of SQLite Database. Public class DBHelper extends SQLiteOpenHelper

#ANDROID STUDIO SQLITE DATABASE TUTORIAL UPDATE#

It automatically manages the creation and update of the database. This method returns true if the cursor is closed and return false otherwiseįor managing all the operations related to the database, an helper class has been given and is called SQLiteOpenHelper. This method returns the current position of the cursor in the table This method returns the total number of rows in the cursor This method returns the array of all the column names of the table. This method returns the name of the column by specifying the index of the column This method returns the index number of a column by specifying the name of the column This method return the total number of columns of the table. Another method that also does the same job but take some additional parameter is given below This will insert some values into our table in our database. Mydatabase.execSQL('INSERT INTO TutorialsPoint VALUES('admin','admin') ') Mydatabase.execSQL('CREATE TABLE IF NOT EXISTS TutorialsPoint(Username VARCHAR,Password VARCHAR) ') We can create table or insert data into table using execSQL method defined in SQLiteDatabase class. This method is similar to above method but it takes the File object as a path rather then a string. OpenOrCreateDatabase(File file, SQLiteDatabase.CursorFactory factory) This method is equivalent to openDatabase method. It not only opens but create the database if it not exists. OpenOrCreateDatabase(String path, SQLiteDatabase.CursorFactory factory) It is similar to the above method as it also opens the existing database but it does not define any handler to handle the errors of databases OpenDatabase(String path, SQLiteDatabase.CursorFactory factory, int flags)

The common flags mode could be OPEN_READWRITE OPEN_READONLY This method only opens the existing database with the appropriate flag mode. OpenDatabase(String path, SQLiteDatabase.CursorFactory factory, int flags, DatabaseErrorHandler errorHandler)

Android studio sqlite database tutorial