CODEWITHSUNDEEP
androidscreencoordinatesandroid-view
Alex
Alex

Reputation: 1469

How to get screen cordinates corresponding to the whole screen, and not the View touched?

Im having some trouble obtaining the real (x,y) from my screen by handling the touch events of one View Item.

I have this:

enter image description here

When I touch the View item, it gives me coordinates with the origin located in his upper-left corner, and if i slide the finger out the view, it gives me negative coordinates (when sliding up or left). enter image description here enter image description here

I would like to obtain the View location in the screen, to add it to the (x,y) coordinates that i get, so the final result is that the (0,0) is in the upper-left corner of the whole screen. enter image description here

I also need the total screen size, so that i know when the finger is located in the lower-right corner.

How can I achieve this?

Thanks.

Upvotes: 16

Views: 19980

Answers (3)

Vikram
Vikram

Reputation: 1092

Try using this after view loaded on screen.

int[] location = new int[2];
View.getLocationOnScreen(location); 
Log.v(Common.TAG,"left: "+ location[0]);
Log.v(Common.TAG,"top: "+ location[1]);

Upvotes: 6

Tim
Tim

Reputation: 35943

MotionEvent class has getX() and getY() methods which return the coordinates relative to the view, as you have discovered.

However it also has getRawX() and getRawY() methods, which according to the docs say:

Returns the original raw X (or Y) coordinate of this event. For touch events on the screen, this is the original location of the event on the screen, before it had been adjusted for the containing window and views.

Sounds like this is what you're after.

Upvotes: 16

slayton
slayton

Reputation: 20309

Get the View's location on the screen, then you can calculate the rest using simply arithmetic. How to get the absolute coordinates of a view

Upvotes: 0

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