Change coordinates to bottom left corner

Question

How can I change coordinates to bottom left corner?

I know that's in Java the coordinates begin from Top=Left corner, but I'm asking if can someone help me how can I change it to begin (0,0) coordinates from Bottom-Left corner?

bottom left corner of what? monitor? some component? or?? – Tomas Bisciak Jan 01 '14 at 06:29 — Tomas Bisciak, Jan 01 '14 at 06:29

score 1 · Answer 1 · answered Apr 22 '21 at 12:27

I think it's too late, but for people like me (new to android development). The above answers are correct but here is a more detailed one

If you get the coordinate with respect to top left as (a,b), then the coordinates with respect to the bottom left are simply (a, h-b) where h is the height of the view.

Example:

float x = getXcoordinatesonTouch();
float y = getYcoordinatesonTouch();

//should return height
float h = getHeightoftheView();

float transformY = h - y;

//"x" should be as it is
//Now you can show "x" and "transformY"

score 0 · Accepted Answer · answered Jan 01 '14 at 06:34

0

getHeight() will get you the size height. so (0, getHeight()) will give you the left-bottom point. But take into consideration the height of the object you want to place. So you may want to use

(0, getHeight() - heightOfObject)

answered Jan 01 '14 at 06:34

Paul Samsotha

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score -1 · Answer 3 · edited Jan 01 '14 at 06:51

-1

Use the value (x, HEIGHT - y).

edited Jan 01 '14 at 06:51

shx2

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answered Jan 01 '14 at 06:30

Amila

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Change coordinates to bottom left corner

3 Answers3