Android Question Click event "inside a loop cicle"

LucaMs · May 1, 2014

An Italian member asked how to catch a click event (of an ImageView) from within a Do While loop.

He also wants the cycle starts when the app starts.

I posted an example (which I attach here); on my phone it works, not on his device.

When he "tap"s on the image, does not happen anything.

Little help? Thank you

klaus · May 1, 2014

An Italian member asked how to catch a click event (of an ImageView) from within a Do While loop.

He or you need to explain what exactly the program is supposed to do.
Why trying to check if an ImageView has been clicked, why not using the events directly ?
To me it looks that the user is not used to event driven operating systems.
It reminds me the (very) old Basics where we had an 'infite' loop waiting for and detecting user intervetions, but this has been improved with the event driven systems.

LucaMs · May 1, 2014

I do not know the precise purpose.

His explanation is roughly:

"I would like to display two images which continue to alternate and when the user clicks on one of them, alternating stops" (and then the "real game" starts).

Have you tried the attached project, Klaus? Works it?

Thanks for your reply

klaus · May 1, 2014

I have looked at the code but haven't tried it.
Before answering a question I want and need to know the problem.
And here I don't know nor undestand what the real problem is and what exactly the user wants or expects.

thedesolatesoul · May 1, 2014

Also remember you cannot catch mist events in a do while loop.
Don't use it.

LucaMs · May 2, 2014

klaus said:
I have looked at the code but haven't tried it.
Before answering a question I want and need to know the problem.
And here I don't know nor undestand what the real problem is and what exactly the user wants or expects.

I have tried to explain what he wants to achieve. I can add a link he posted.

thedesolatesoul said:
Also remember you cannot catch mist events in a do while loop.
Don't use it.

"mist" events? I do not know what it means.
I know only that code works on my device and not on his own, so I thought to ask others to test it.

klaus · May 2, 2014

Try the attached code.
The problems in your code are:
- The images switch too fast. From what I have seen in the italian forum he wants 2 seconds between image switches.
- Your code is an infinte loop, when you go back from the actQuiz Activity to Main Activity this one launches actQuiz again.

A Timer is the solution not a loop !

I saw in your code:

B4X:

Sub Activity_Pause (UserClosed As Boolean)
    ' Attention: UserClosed will be True even if orientation changes.

This is wrong !
UserClosed = False when the orientation is changed !

LucaMs · May 2, 2014

klaus said:
Try the attached code.
The problems in your code are:
- The images switch too fast. From what I have seen in the italian forum he wants 2 seconds between image switches.
Yes, I now, but it was only an example on how to catch the event
- Your code is an infinte loop, when you go back from the actQuiz Activity to Main Activity this one launches actQuiz again.
This is due to the fact that he wanted to start the animation automatically and I put the call in the Main Resume
A Timer is the solution not a loop !

I saw in your code:

B4X:

Sub Activity_Pause (UserClosed As Boolean) ' Attention: UserClosed will be True even if orientation changes.

This is wrong !
UserClosed = False when the orientation is changed !
Yes, thank you, it is part of the template B4A, i forgot to remove it

Thanks, Klaus, I point out to him your post.

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