Android Question Detect when touch or scroll ends

[apty]

I would like to know how i can detect when a user has stopped touching the screen or scrolling through it.
e.g. If a user scrolls from left to right of the screen,once he stops i would like to display a message. Is this possible? please help

 

[Computersmith64]

Are you wanting to do this in a particular view (eg: a scrollview), or do you want to detect it at the activity level? I haven't tried this myself, but I imagine you would want to implement a gesture recognizer. If you search the forums for gesture recognizer, you should find some info...

- Colin.

 

[apty]

my scenario is like that of Uber or Taxify app. i want to detect when the user has scrolled and stopped at a particular place on Google map. If the user has stopped i want to display a message. If i use a delay method like the one mentioned here (https://www.b4x.com/android/forum/t...ke-wait-or-delay-for-some-milliseconds.38465/) the app UI hangs.

 

[Computersmith64]

Are you using a loop like shown in that thread? If so, you need to add a Sleep so the UI can continue to update:

Do While [whatever]
    Sleep(0)
Loop

- Colin.

 

[apty]

After adding sleep, the delay function is no longer working

 

[Misterbates]

Use a timer. Enable it and record current ticks when scrolling starts. Each further scroll record current ticks. Detect that scrolling has stopped in the timer tick event by testing to see if ticks were updated since the last timer event

 

[Computersmith64]

After adding sleep, the delay function is no longer working

As Misterbates says, if you want to have a delay that also allows the UI to continue updating you'll have to use a timer (or something other than a loop). If you post the code you have, it might be easier to point you in the right direction (if a timer isn't going to do it for you).

- Colin.

 

[Erel]

Sleep doesn't block the UI. It does cause the code flow to return to the parent sub. See resumable subs tutorial.