Android SQLite更新无法正常工作

Question

I am trying to update one column for any number of rows.

Here is the function:

public void setAwardsSyncComplete(String[] ids) {

    String inArray = StringUtils.separateCommas(ids);
    db.beginTransaction();

    try {
        ContentValues contentValues = new ContentValues();
        contentValues.put(COL_SYNCED, true);

        int rowsAffected = db.update(TABLE, contentValues, COL_ID + " IN (" + inArray + ")", null);

    } catch (Exception e) {

        DebugLog.e("Error in transaction", e.toString());
    } finally {

        db.endTransaction();
    }
}

What is strange is that the rowsAffected returns correctly (ie rowsAffected > 0), but the column values remain null .

Am I overlooking something very simple here?

Thanks.

Answer 1

As you're using transactions, you need to call db.setTransactionSuccessful(); at the end of the try clause. Without this, the update gets rolled back.

See SQLiteDatabase.beginTransaction

Hope this helps,

Phil Lello

Answer 2

你需要调用db.setTransactionSuccussful()后db.update否则任何更改都将回滚，当你调用endTransaction() 。

Answer 3

there's no explicit boolean type in sqlite tables? what data type is the COL_SYNED column you are trying to update?

and you will need to call db.setTransactionSuccussful()

Answer 4

I think there is a problem on your update..

You need to loop your array and update each one by one..

    private int _rowsAffected;

    foreach (var a in inArray)
    {

    _rowsAffected= db.update(TABLE, contentValues, COL_ID + " = (" + a +")", null);

    }

    db.Commit();
    db.setTransactionSuccussful(); 


if(_rowsAffected > 0)
//Success

Regards