My requirement is similar (not the same, of course) to the GuitarTuna app. I want to draw on an infinite vertical ScrollView as follows:
A trail emanating from the bottom of the pin on the top of the screen can be seen in the image above. It keeps scrolling with the ScrollView and disappears (by scrolling out of the screen) if the drawing is stopped.
What is the best way to create a similar kind of drawing interface?
1 Answers
Answers 1
EDITED
Hi!
Finally, i think, i understand what you need. I really don't know if is possible to achieve by this using the example that you mention.
I would try the option of using a SurfaceView. Here's what i have until now:
An interesting answer about how to draw inside scrollView:
How to draw in a SurfaceView: example 1 example 2
Complete example of draw using TouchListener in a SurfaceView
How to draw to Canvas from SurfaceView?
Good answers that explains how a SurfaceView works :
Android: How to draw on a Surfaceview which already is displaying a Camara Preview View and SurfaceView, which one is better?
Ideas on how to scroll a surfaceView?
I wish to have more time to help you, and change my answer with some code.
Hope it helps!
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