SimpleCursorAdapter and Spinner control

by gin_tonic » Thu, 29 Oct 2009 14:42:49 GMT

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I'm trying to create a very simple application that extract data from
SQL database and populate a spinner control with (for example) product
I found the following example of the code:

String[] from = new String[] { "Product_Name" };

int[] to = new int[] { };

SimpleCursorAdapter adapter = new SimpleCursorAdapter(this,
android.R.layout.simple_spinner_item, product_cursor, from, to  );



The only thing I couldn't understand what should I put into "to"
array? The spinner is the only control on the form. I tried to find
the answer, but most of the samples use ListView control and put
"" into "to" array



SimpleCursorAdapter and Spinner control

by gin_tonic » Fri, 06 Nov 2009 06:47:06 GMT

 Found the source of the problem and the solution.

1. is predefined UI element for Spinner control and
should be used in 'to' array
2. In this case (using SimpleCursorAdapter) cursor MUST have '_id'
field. If you get data from SQL database and use raw SQL query, it
possible to use the next statement:
    SELECT Product_ID AS _id ...


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