SQLiteAssetHelper升级异常

Question

I have an app using SQLiteAssetHelper. I'm trying to update its database to include an additional table.

All is well except I cannot make the primary key to autoincrement. Whatever I try gives me an exception.

I reckon it could be a syntax issue since using INTEGER instead of INT also crashes the app.

Where can I find a reference for the syntax that SQLiteAssetHelper uses?

Thank you all.

The offending script looks as follows:

CREATE TABLE heat (
_id int PRIMARY KEY AUTOINCREMENT,
amount int,
comment text
);

Even when I get the script to work (is it AUTOINCREMENT or auto_increment ?), insert statements fail to add a value in the _id column. It is left blank.

final ContentValues cv = new ContentValues();

cv.put( KEY_AMOUNT, lAmount );
cv.put( KEY_COMMENT, sComment );

final long lId = m_db.insert( TABLE_NAME, null, cv );

Answer 1

Change the database version to upgrade the table

 private static final int DATABASE_VERSION = 1;

 public DatabaseHandler(Context context) {
    super(context, DATABASE_NAME, null, DATABASE_VERSION);
}

Answer 2

AUTOINCREMENT requires an INTEGER PRIMARY KEY , an INT PRIMARY KEY won't do. Changing that fixed the problem with the SQL you posted. If you have other problems, please post the exception message and code that causes it.