Android Question Canvas not smooth on later sdk

[tpakis]

I used the code in the first post of https://www.b4x.com/android/forum/threads/android-multitouch-tutorial.10419/ and runs smoothly. But if i change the minsdkversion from 4 that it is to for example 19, the drawing stops beeing smooth and gets chunky. Any idea on why is that?

 

[Erel]

Try this: click on Ctrl + P (clean project) and run it. Make sure that there are no breakpoints in the touch related code.
Does it run smoother?

 

[tpakis]

Try this: click on Ctrl + P (clean project) and run it. Make sure that there are no breakpoints in the touch related code.
Does it run smoother?

No still the same weird behavior perfect on 4, chunky on 19. Testing on real lollipop device, release mode, latest b4a. The code i use is the same as the tutorial, removed the random color i put one specific, removed the text draw, i draw only the line with one finger.

 

[Erel]

I tested it here on an Android 8 device and it is very smooth. It is probably related to the hardware acceleration.

1. Try to remove the EditText and see whether it improves the performance.
2. Disable the panel's hardware acceleration feature: https://www.b4x.com/android/forum/t...rary-and-setlayoutanimated.82637/#post-523387

 

[tpakis]

Yes now it works, after disabling the hw acceleration. It's very strange it should be faster with hw not slower

 

[tpakis]

I think i found the answer: https://groups.google.com/forum/#!topic/android-developers/TjPKVJOIUUI

Who would have guessed...