![]() Create Database and Tables using SQLite Helper Now we will see how to create a database and required tables in SQLite and perform CRUD (insert, update, delete and select) operations in android applications. The package contains all the required APIs to use an SQLite database in our android applications. Just like we save the files on the device’s internal storage, Android stores our database in a private disk space that’s associated with our application and the data is secure, because by default this area is not accessible to other applications. In case, if we want to deal with large amounts of data, then SQLite database is the preferable option to store and maintain the data in a structured format.īy default, Android comes with built-in SQLite Database support so we don’t need to do any configurations. Generally, in our android applications Shared Preferences, Internal Storage and External Storage options are useful to store and maintain a small amount of data. To know more about SQLite, check this SQLite Tutorial with Examples. SQLite is an open-source lightweight relational database management system (RDBMS) to perform database operations, such as storing, updating, retrieving data from the database. In previous chapters, we learned how to use shared preferences, internal storage, external storage and now we will see how to use the SQLite Database option to store structured data in a private database. to store and retrieve the application data based on our requirements. Import android, we have different storage options such as shared preferences, internal storage, external storage, SQLite storage, etc. 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 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) ![]()
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