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- #HOW TO CREATE SQLITE DATABASE IN ANDROID HOW TO#
- #HOW TO CREATE SQLITE DATABASE IN ANDROID UPGRADE#
- #HOW TO CREATE SQLITE DATABASE IN ANDROID ANDROID#
- #HOW TO CREATE SQLITE DATABASE IN ANDROID DOWNLOAD#
#HOW TO CREATE SQLITE DATABASE IN ANDROID ANDROID#
To use SQLiteOpenHelper, we need to create a subclass that overrides the onCreate() and onUpgrade() call-back methods.įollowing is the code snippet of creating the database and tables using the SQLiteOpenHelper class in our android application. In android, by using SQLiteOpenHelper class we can easily create the required database and tables for our application. Create Database and Tables using SQLite Helper
#HOW TO CREATE SQLITE DATABASE IN ANDROID HOW TO#
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.
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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.
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to store and retrieve the application data based on our requirements. Public static final String SQL_CREATE_BOOK_ENTRY_TABLE = "CREATE TABLE " + TABLE_NAME + " (" +īookEntry.In android, we have different storage options such as shared preferences, internal storage, external storage, SQLite storage, etc. Public static final String COL_DESCRIPTION = "book_description" Public static final String COL_NO_PAGES = "book_pages" Public static final String COL_BOOKNAME = "book_name" SQL_CREATE_BOOK_ENTRY_TABLE public static final String TABLE_NAME = "books"
#HOW TO CREATE SQLITE DATABASE IN ANDROID UPGRADE#
It is not a good idea to reference variables in your upgrade scripts.
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This looks okay right? This upgrade could leave dangling tables (and might fail if you use “DROP TABLE”) if you change the name of the table in one upgrade to another and you call the same lines of code later on. You might have the following in your upgrade section of your app: db.execSQL(drop + Books.TABLE_BOOKS) It’s worth noting that this solution will not work well for changing of table names. It is also the solution that the Android Developer Documentation states.
#HOW TO CREATE SQLITE DATABASE IN ANDROID DOWNLOAD#
When the user upgraded, the “cache” would disappear and they would have to download all the data again. We weren’t storing user data our database was just a cache of things from the network. Sure, when we started development this was obviously the easiest approach. These are the solutions that we went through: Solution 1: Delete the tables that have changed and recreate them I’ve been there and battled the fires in production. Upgrading databases in Android is difficult. When using your own SQLite database in Android, most people take for granted future releases of the application they are working on. Looking at the Android Developer documentation can also lead you down a rickety path. The post explains quite well the drawbacks of some of the solutions that I also went through, but their final solution can also leave you in trouble. After reading this blog post (and a few others) on how to use the onUpgrade() method for your Android SQLite Database, I thought I should share my experience about how to correctly upgrade your database. It will also be beneficial to highlight why the final solution listed in that blog post would also fail at some point for some scenarios.