When you are providing the database while developing the application, app builder takes the database from the reference location and copy it to the APK and after deploying that APK into the device the database will be managed in the device only so the database that you have provided on your PC/laptop is just for the starting, it is not the same database that device modifies. In the second case, they provide the database from as a reference in the asset /www directory and that database will be used by the application and after modifying the data in the database they look for the change in the same database which is confusion point. If we talk about the database that we make in runtime then we can understand that but most people get confused in the second case when we use the pre-populated database. While developing the application either we provide the pre-populated database or make the database at runtime but in both cases, we can not see the database of the device directly. There are lots of confusion in people related to How to see the SQLite database? and that is the main reason behind writing this post. This is an extended post of our previous post Example of SQLite Database in React Native and Example to Load Pre Populated SQLite Database in React Native. This post has the steps to see the data stored in the SQLite database in the device. Import static .Here is How to See SQLite Database Data Saved in Device using Android Studio. 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: onUpgrade(SQLiteDatabse db, int oldVersion, int newVersion): invoked when we make a modification to the database such as altering, dropping, creating new tables.onCreate(SQLiteDatabase db): invoked when the database is created, this is where we can create tables and columns to them, create views or triggers.This class provides two methods to override to deal with the database: The first step is to create a class that inherits from SQLiteOpenHelper class. First, we will create a class that handles all the operations required to deal with the database such as creating the database, creating tables, inserting and deleting records and so on. ViewEmps: to display employees and their relative departments.īy default, SQLite on Android does not have a management interface or an application to create and manage databases from, so we're going to create the database ourselves by code.In this tutorial, we will create a simple database application to store employees data. SQLite Full Unicode support is optional and not installed by default.
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