![]() ![]() Now let’s see how we can create the above table in our SQLite database.(If you are confused don’t worry we will see now how do we create tables in database using SQL). Also, remember one thing whenever you create a table create a column named id with int as PRIMARY KEY and AUTOINCREMENT. Now we have only a single table, but in real-world scenarios, you will have multiple tables with some complex relationships.So for this, I will use the following table structure. But here we are not building an application, and it is only an example demonstrating the use of SQLite Database. We create database structure according to the system. The first thing needed is the database structure.Once your project is loaded, we can start working on it.For this example, I have a new project named SQLiteCRUDExample. As always we will create a new Android Studio Project.Before moving ahead on this tutorial if you want to know what we will be building, you can get the final apk of this tutorial from the link given below.Īndroid SQLite Database Example App Apk Download Android SQLite Database Example Creating a new Android Studio Project.What is CRUD?Īs the heading tells you here, we are going to learn the CRUD operation in SQLite Database.īut what is CRUD? CRUD is nothing but an abbreviation for the basic operations that we perform in any database. If you are going through this post, then you must know the Basics of SQL. We are not going in depth of what is an SQL database and how to work in SQL database. The tables are the structure of storing data consisting of rows and columns. So in SQL database, we store data in tables. I am assuming here that you are familiar with SQL databases. 5 Android SQLite Database Example Source Code.4.1 Creating a new Android Studio Project.3 Android SQLite Database Example App Apk.Package import import import import import import import java.util. The data stored can be checked on the logcat. In the below example, we are demonstrating the usage of the android SQLite database to store and fetch the data. Int update(String table, ContentValues values, String whereClause, String whereArgs)Ĭursor query(String table, String columns, String selection, String selectionArgs, String groupBy, String having, String orderBy) The values to be stored are specified by the third argument. The null values are stored by android, if the second argument is null and the values are empty. select 1 This should return exactly 1 and nothing else, and it will definitely fail when there is no connection to the database. ![]() Completely null values are not allowed by the nullColumnHack. It is easy to test the database connectivity by sending some trivial SQL like. The table name is specified by the table. 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) cd to change to the new working directory. However, we can create a new folder in Windows and within sqlite> prompt, you may use the. To be called when the database needs to be upgraded. In Windows machines (Windows 2010), by default, the new SQLite database files will be stored in the same folder where Sqlite3.EXE application is stored in your machine. 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. ![]() The functionality to use the SQLite database is provided by the class which is used for database creation and version management. ![]()
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