Question

I wanted to add a new column to an Android SQLite Database and then I recieved errors. What should I do and how? I thought that I have to delete the table and create a new one but i don’t know how.

Answer 1

The easiest way to do this is to add some SQL to the onUpgrade() method in your SQLiteOpenHelper class. Something like:

@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

    // If you need to add a column
    if (newVersion > oldVersion) {
        db.execSQL("ALTER TABLE foo ADD COLUMN new_column INTEGER DEFAULT 0");
    }
}

Obviously, the SQL will differ depending on the column definition.