![]() Adding onClick event handlers to views and dynamically creating onClick handlers.Using adapters as intermediaries between data and views.Creating, building, and running apps in Android Studio.In a production app, where database operations might take quite some time, you would perform these operations on a background thread, for example, using a loader such as AsyncTaskLoader and CursorLoader.įor this practical you should be familiar with: Important: In this practical, the SQLiteOpenHelper executes database operations in the main thread. In this practical, you will create a SQLite database for a set of data, display retrieved data in a RecyclerView, add functionality to add, delete, and edit the data in the RecyclerView and store it in the database. When you use a SQLite database, all interactions with the database are through an instance of the SQLiteOpenHelper class which executes your requests and manages your database for you. Task 4: Edit words in the UI and store changes in the databaseĪ SQLite database is a good storage solution when you have structured data that you need to store persistently and access, search, and change frequently.Task 3: Display the data in the RecyclerView.Task 2: Extend SQLiteOpenHelper to create and populate the database.This course is now deprecated and this content will be The new course is available atĪndroid Developer Fundamentals course (Version 2), or go directly to Lesson 11: Sharing Data with Content Providersġ1.1A: Implementing a Minimalist Content Providerġ1.1B: Adding a Content Provider to Your Databaseġ2.1: Loading and Displaying Fetched DataĪ new version of this course is now available, updated to reflectīest practices for more recent versions of the Android framework andĪndroid Studio. Lesson 8: Triggering, Scheduling, and Optimizing Background Tasks ![]() Lesson 3: Testing, Debugging, and Using Support LibrariesĤ.1: Using Keyboards, Input Controls, Alerts, and PickersĤ.2: Using an Options Menu and Radio ButtonsĤ.3: Using the App Bar and Tabs for Navigationĥ.2: Material Design: Lists, Cards, and Colorsĥ.3: Supporting Landscape, Multiple Screen Sizes, and Localizationħ.2: Connect to the Internet with AsyncTask and AsyncTaskLoader getCount(): This method returns number of rows in the cursor.įollow next tutorial for complete Android SQLite database example, demonstrating create, update, retrieve and delete data.1.1: Install Android Studio and Run Hello World.getString( int column ): This method returns the value of given column in the form of a string.getPosition( ): This method returns current position of curser in the form of row set.isNull(): Checks cursor is pointing to null.isLast(): Checks cursor is at last row or not.isFirst(): Checks cursor is at first row or not.move( int offset): This unction is used to move the cursor forward or backward according to the given offset value. ![]() moveToNext(): This function moves the cursor to the next row.moveToLast(): This method moves the cursor to the last row.moveToFirst(): It moves the cursor to the first row.rawQuery(): returns result set in the form of cursor object pointing to the table.There are many functions of Cursor class which help us in data retrieval. Cursor object help us to retrieve anything from the database. releaseMemory( ): used to free memory that SQL was holding.Ĭursor is an interface which provides random read write access.update( String table, Content values, String whereClause, String whereArgs): Used to update rows in a database.isOpen( ): Tells whether database is open or not.isreadOnly( ): Tells whether database is read only or not.getVersion( ): Method to get version of database.getPath( ): Method to get path to database.delete( String table, String wholeClass, String whereArgs): Method to delete rows in a database.deleteDatabase( File file): It deletes whole database.complieStatement( String sql): It compiles SQL statements.createSQLIteDatabase( SQLiteDatabase.Cursorfactory factory): Used to create SQLite database.Here are some public methods of SQLiteDatabase class. SqliteDatabase class has many different methods to create database, to execute SQL commands and to delete database. package has all you need to save data of your application. It supports text, integer and real data types. ![]() SQLite database supports standard features of relational database. It is very light weight and also open source. SQLite is SQL database, it stores data of your application in a text file. It is a pre-sequal to the complete Android SQLite Example.ĭo you want to store and save data of your Android application in your device? The solution is very easy as Android has built in SQLite database engine with it. This article is an introduction to SQLite database classes and methods.
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