Public class DbHandler extends SQLiteOpenHelper ) Once we create a new class file DbHandler.java, open it and write the code like as shown below DbHandler.java Once we create an application, create a class file DbHandler.java in \java\ path to implement SQLite database related activities for that right-click on your application folder à Go to New à select Java Class and give name as DbHandler.java. In case if you are not aware of creating an app in android studio check this article Android Hello World App. Android SQLite ListView Exampleįollowing is the example of creating the SQLite database, insert and show the details from the SQLite database into an android listview using the SQLiteOpenHelper class.Ĭreate a new android application using android studio and give names as SQLiteExample. Now we will see how to create & insert data into SQLite Database and how to retrieve and show the data in custom listview in android application with examples. To know more about using SQLite Database in android applications, check this Android SQLite Database Tutorial with Examples. In case, if we want to deal with large amounts of data, then the SQLite database is the preferable option to store and maintain the data in a structured format. 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. Import static .SQLite is an open-source lightweight relational database management system (RDBMS) to perform database operations, such as storing, updating, retrieving data from the database. Also if you have a result set of only one row and you need to retrieve values of certain columns, you can do it like this: There are also some useful methods to check the position of a cursor: boolean isAfterLast(), isBeforeFirst, isFirst, isLast and isNull(columnIndex). boolean moveToLast(): moves the cursor to the lase row in the result set, returns false if the result set is empty.boolean moveToPrevious(): moves the cursor to the previous row in the result set, returns false if the cursor is past the first row.boolean moveToPosition(int position): moves the cursor to a certain row index within the boolean result set, returns false if the position is un-reachable.boolean moveToFirst(): moves the cursor to the first row in the result set, returns false if the result set is empty.boolean moveToNext(): moves the cursor by one record in the result set, returns false if moved past the last row in the result set.There are some common methods that you will use with cursors: Result sets of queries are returned in Cursor objects. String Order By by: A string Order By by clause.String Having: A string specifying HAVING clause.String Group by: A string specifying group by clause.String selection args: The parameters of the WHERE clause.String WHERE clause: where clause, if none pass null.String columns: The projection of the query, i.e., the columns to retrieve.String Table Name: The name of the table to run the query against.The db.query has the following parameters: Public void onCreate(SQLiteDatabase db) Ĭursor c=db.query(viewEmps, columns, colDeptName+ " =?", Our class will have the following members:
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