Develop Reference

How to send touch event equally to gesture Overlay view and Canvas

I do not know what is going on. I am hiding the gesture drawing , rather then this I am planning to show the the drawing drawn by the paint and canvas.I am using the drawing panel class which is working fine if used alone as shown in this question. It is drawing perfectly.
Now what I was thinking and tried is this , I have implemented the gesture overlay view alone and it was working and detecting gesture. But due to some reasons I am manipulating these two methods all together 1.Paint to draw on canvas 2 gesture to recognize user gesture while drawing on Canvas
Now what I am trying and expecting is , When user draw A on canvas the the canvas starting following the user finger and starts drawing but I think as when the gesture overlay starts detecting gesture, it looks like that the touch is passed to gesture overlay view where as the Paint and canvas stops further drawing.
What I want :
I want that the touch event should be received by the canvas and gesture overlay equally , so that they both work independently.
In simple Words , Do you have any idea how to send touch event to both of these equally ?

Ok there it is , I found the solution , if some one also trying to get it , I mean to use Gesture overlay view , while having other child. Just put the following line in the gesture overlay view xml
android:eventsInterceptionEnabled="false"
and it would start working .

Drawing and storing a user's touch path in libgdx

I'm struggling with something I would expect to be straight forward with libgdx.
In short this is a "finger paint" app where I want to draw a path of a certain width where the user touches the screen.
I've earlier done this by using a plain Android android.view.View. I had a android.graphics.Path in which I stored the coordinates of the user's current touch. In the onDraw() method of the view I drew the path to the android.graphics.Canvas. Whenever the user released a finger I drew the path to an offline canvas/android.graphics.Bitmap which also was drawn in the onDraw() method. Plain and simple.
How can that be done using libgdx?
I have tried using a com.badlogic.gdx.graphics.Pixmap that I can draw a line to whenever the user moves a finger. This works well except the fact that I'm unable to control the witdh of the line using Gdx.gl.glLineWidth(). I know I can draw a rectangle instead of a line to set the width, but Pixmap doesn't seem to have any means of rotating, so I don't see how this can be done.
I can use a com.badlogic.gdx.graphics.glutils.ShapeRenderer for drawing lines (or rectangles) in com.badlogic.gdx.Screen.render(). As far as I can see I then need to store every single touch point of the current touch, and then draw all lines on render. Whenever the user relases a finger I guess I can store the screen as-is with something like com.badlogic.gdx.utils.ScreenUtils.getFrameBufferPixmap(). Hopefully there is a easier way to achieve what I want.

I ended up drawing circles on a pixmap where the line should be:
One circle on touchDown
Several circles from last touch point to next touch point reported to touchDragged
I'm not very happy with this solution, but it kinda works.

Maybe you can calculate line dot coordinates manually and use triangles to draw them on pixmap? Like use 2 triangles to form (rotated) box?

android MotionEvent when finger enter or leaves view

I wan't to develop game named "Balda".
I have a 2d grid of imageviews (or buttons, maybe).
User should be able move his finger on the grid, and app should know wich images in grid was touched in this move.So, in the picture below is what I'm trying to achieve. A - is start point where user pressed on screen. B is end point where finger leaves the screen. And I need to know what images were touched (There are blue in the picture).
I know that I can do something like this. But I think that this is a wrong solution, because It contradicts the principle of giving functionality by responsibilitys.
I think that it is responsibility of the imageView to know when finger enters its borders and when it is leaving its borders.
I thought, that this would be in android API. And it has MotionEvent like EVENT_HOVER_ENTER and EVENT_HOVER_LEAVE but it's not working with finger. After finger is pressed on some View it will recieve all other MotionEvents, if I get it right.
I think that this is wrong. What can I do to get this functionality? Maybe I could create some custom listeners and custom Views, that supports them?

I think your requirement is slightly similar to custom gridview.
You can try below steps-
1)Create Custom view
2)Attach TouchListener to it.
3)Divide this view into 4*3 matrix.
4)Map your images to this 4*3 matrix
5)Write a function which gives the cell number respective toTouched Co-ordinates
6)After getting cell number;get the mapped image for that cell number
7)Put this image in arraylist
8)When user lifts his finger you will get arraylist of touched images(do whatever you want with it).
9)Remember to put this custom view in your activity
Tell me,if you have any doubt or concern

How do i create a custom clickable graphic for my android app?

I want to create an interactive graphic for my app. It will essentially be a simple picture of a bus line where users can select 2 stops at a time (one for departure times and another for arrivals) I'm not sure how to create this image though, and have it have 20 or so different clickable points. Is there a framework I could use for this? Or is there a way to do this in pure android?
Thanks for the help.

I would suggest writing an onClick listener and using a collection of Rect instances to manage the collision/position of the 'click'. Check out the on click page and the rect page.
One thing to keep in mind are the origin point of your clicks, I'd assume you'll want to use one corner of your image as the point (0,0) and reference everything (clicks and rects) from there.

I would say try to create an ImageView to load your image and set a touch event listener or a click listener to that view. Hard code all places that you want your image to react upon a click.
Check click using an event listener would require you to handle both ACTION_DOWN and ACTION_UP in the MotionEvent object passed in. But it's easier to grab the coordinate of where the user clicks on the page, so you only need one listener but needs to put more work on handling the conversion from the coordinate passed in by MotionEvent to the coordinate on image. This is particular a major issue when your image can be sized larger than the screen size.
Using a click listener would save you from this trouble. As #smitec said, you need to overlay rectangles on your image as "buttons", so you can react to user input based on which buttons they pressed. This way you need to bind listeners to all of them (I suppose) and hard code their positions on your image. But, as mentioned earlier, it saves you from dealing with coordinates later on.

android - how to define touchable areas inside a circle

I'm currently trying to create a circle (via canvas drawing, opengl or drawable) and define 4-5 buttons inside of it. My first thought was to create some drawables (quarters of circles) and overlay them onto the main circle, but then I'll have the touchable zone too large - e.g. in the middle of the main circle.
Is there anyone who tried this and found a decent solution to it?

You could just override onTouch() in your custom View that draws the circle (and other button graphics), and do a bit of simple maths when you get the finger down event to determine whether the user has touched within the circle, and what particular defined zone within the circle.