App Inventor中的Fusion Table查询无法正常工作

Question

I have the following code blocks in App Inventor:

Note: The red warning is because I have a second btnRemove.Click event which is a disabled block and is not used.

This is my Fusion Table:

Right now I am trying to remove the row that has ID number 15 when the button click event is called. If I click the button I see the fusion table window (rotating for a second) and then dissapears. This indicates that something is happening but not what I want it to happen.

Answer 1

This does not work, because the DELETE statement needs a ROWID to be able to do the delete, see also the SQL Reference Documentation of the Fusion Tables API .

DELETE FROM <table_id>{ WHERE ROWID = <row_id>}

which means, for DELETE statements the first step to be done is to get the ROWID of the row to be deleted with a SELECT statement. The second step is to do the DELETE.

Also I would use the FusiontablesControl.GotResult event to get the result of the query back, in your case the error message...