How should I do a curved path draw animation in Android canvas?
I am trying to do a curved path animation on Android on canvas. I have to draw a scooter animation like drawing itself.
Thanks in Advance!!!
Curved Path animations on Android are possible through PathInterpolator and PathInterpolatorCompat which is backward compatible, available in support library. But your question seems rather confusing to me if you want to draw a path of a scooter, then create a Path object containing the path coordinates of scooter then use Canvas.drawPath and draw that path. PathInterpolator is actually used for changing the path of animation during a translate or similar kind of animation which moves along a path. However, A better approach that I suggest is using a VectorDrawable and manipulating its trimStart and trimEnd properties to maintain how much path of scooter gets drawn.
Related
I am drawing svg vector image on canvas. There was fetched all elements from svg file seperatly in List. It allows me to draw and animate each element of the picture how needed.
The question is: How can I add blowing animation for all blue elements (something similar on hair animation like this)?
I heard something about animating besier curve, but I could not find anything about it.
Thanks in advance for your help.
I don't know alot about graphics and drawings but I am trying to do something on canvas, and that is using vector graphics instead of bitmap to draw path on canvas with finger , I cant find any documentation or tutorials to understand how to do that, but I know that this implementation is used by some drawing apps.
According to my searching I deduced that using vector graphics will never show pixels on the edges of the path even if you zoomed.
Please suggest any thing that might help me use vector graphics and attach it to canvas to draw, thanks.
If you just want to draw with the finger :
Assuming you have a custom View that covers the drawing area ...
On onTouch handler on ACTION_DOWN create a new Path object with origin at touch point, on ACTION_MOVE you add new segments to the Path and call invalidate().
On onDraw you draw the Path on the Canvas.
I'm searching for a way of filling the Area under a cubic Bezier curve in Android. To be specific I'm trying to draw a Figure like in the Picture below in a Custom View. My idea is to draw a circle and two mirrored cubic Bezier curves and fill the area beneath them. Is there an Android built in way to archive this, or do I have to find another solution? If so can you help me find an alternative solution?
The shape I would like to draw:
What you need here is Path. More info here:http://developer.android.com/reference/android/graphics/Path.html
In your case, you need to create a Path
Move that to a point that you want via path.moveTo()
Add the first bezier curve via path.cubicTo()
Add the circle to the path via path.addCircle()
Add the second bezier curve via path.cubicTo()
Finally, close the path via path.close()
As for the fill of the path. Normally, the path is filled inside. If you are looking for something else, I suggest you play around with path.setFillType().
How can i draw bezier curve in android , can any one suggest some references or existing source code that helps me to understand bezier curve .i want to crop image in my android app using any close path like Bezier Path. i know it is possible using rectangle but i want crop in different shape. like i make one shape using touch and want to crop that image so how it is possible. any suggestion or help. Thanks in advance.
You best bet would be to use the quadTo and cubicTo and other utility methods available in the Path class. All you have to do is determine the control points.
I have written a simple tutorial on how to use Path and PathMeasure to draw lines, curves, etc., You may find it here:
http://c05mic.wordpress.com/2012/03/23/animating-a-bitmap-using-path-and-pathmeasure-android/
Not sure how to do this, or what the right terms are for describing this, but here goes:
I want to make a closing circle animation in my android app, much like the end of this video. I'm guessing what I need to do is somehow draw a black circle but instead of filling the inside of the circle fill the outside. How exactly would I do that, given the tools I have with Android's Canvas class?
Have you tried using clipPath to achieve this?
I was working on the same kind of thing and achieved it by using clipPath of canvas.