You could use something like this: Create your table: static final String CREATE_DB_TABLE = “CREATE TABLE ” + CONTACTS_TABLE_NAME ” + ” (_id INTEGER PRIMARY KEY AUTOINCREMENT,” + “…” + ” flag INTEGER DEFAULT 0)”; retrieve your value as: Boolean flag = (cursor.getInt(cursor.getColumnIndex(“flag”)) == 1);
The bolded font in the citation corresponds to this part in your code: private DatabaseManager open() throws SQLException { dbHelper = new DatabaseHelper(context); db = dbHelper.getWritableDatabase(); from: http://www.androiddesignpatterns.com/2012/05/correctly-managing-your-sqlite-database.html Approach #1: Use an Abstract Factory to Instantiate the SQLiteOpenHelper Declare your database helper as a static instance variable and use the Abstract Factory pattern to guarantee … Read more
SQLite Release 3.25.0 will add support for window functions 2018-09-15 (3.25.0) Add support for window functions Window Functions : A window function is a special SQL function where the input values are taken from a “window” of one or more rows in the results set of a SELECT statement. SQLite supports the following 11 built-in … Read more
There is no 2 GB limit. SQLite database files have a maximum size of about 140 TB. On a phone, the size of the storage (a few GB) will limit your database file size, while the memory size will limit how much data you can retrieve from a query. Furthermore, Android cursors have a limit … Read more
Automatic indexing was introduced in sqlite 3.7.17. A version of sqlite with this feature was only included in Android L developer preview. This is why you get the message only on Lollipop but not earlier. Even if it is logged as an error, it’s really just a message. Basically, the automatic indexing comes into play … Read more
It seems that you added some columns later in the database. I do agree with Ken Wolf and you should consider uninstalling and re-installing your app. One better approach is, drop and recreate all tables in onUpdate method, and increase the db version every time you change the schema.
SQLite supports the standard SQL variables CURRENT_DATE, CURRENT_TIME, and CURRENT_TIMESTAMP: INSERT INTO Date (LastModifiedTime) VALUES(CURRENT_TIMESTAMP) The default data type for dates/times in SQLite is TEXT. ContentValues do not allow to use generic SQL expressions, only fixed values, so you have to read the current time in Java: cv.put(“LastModifiedTime”, new SimpleDateFormat(“yyyy-MM-dd HH:mm:ss”).format(new Date()));
It is usually not recommended to store image data into the database. But however if it is required for your project then you can do so. Image data are usually stored into db using BLOB data type, Room also provide support for BLOB data type Documentation You can declare your entity class as mentioned below … Read more
Yes, this is tricky on Android. You don’t want to store the plaintext password in the preferences, because anyone with a rooted device will basically be displaying their password to the world. On the flip side, you can’t use an encrypted password, because you’d have to store your encryption/decryption key somewhere on the device, again … Read more
This answer might not be related to yours but i thought it should be helpful for others who are working with android database. IN SQLite Foreign key constraints are disabled by default (for backwards compatibility). You have to enable it explicitly using PRAGMA foreign_keys = 1 after you establishing your connection with the database. Here’s … Read more