How to check if a value already exists in the database in Android

Question

I\'ve a database that I will populate with items after I parse a JSON response. How can I check if the values are already present in the database and prevent inserting again

Answer 1

In your example table:

When you create your table you can set your name as unique (if that is what you want unique) with the following (Using a SQLiteOpenHelper).

String createPlayerTable = "create table " +
                TIME_REPORT +
                " (" +
                USER_ID + " integer primary key autoincrement not null," +
                CLIENT_NAME + " text not null," +                    
                "UNIQUE("+CLIENT_NAME+")"+
                ");";

Then in you insert insertIntoDatabase method use

db.insertOrThrow(TIME_REPORT, null, initialValues);

instead of

db.insert(TIME_REPORT, null, initialValues);

This may throw a SQLiteConstraintException so you will have add a try/catch.

Hope this is what you need.