android: finding the position of a click within a button -

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i have set of imagebuttons placed within relative layout, , each imagebutton has shape within visible while rest of set alpha. have set these buttons overlap, , trying code when alpha part of 1 button pressed, ignores button , checks button underneath it. using ontouch() ontouchlistener x , y coordinates of touch on screen, calculated based on whole screen can tell. there way use position found event.getx() , event.gety() @ button on screen , see if spot clicked on button transparent or not?

use view.getlocationonscreen() and/or getlocationinwindow(). https://stackoverflow.com/a/2226048/1979882

in order check if alpha-channel exists, use:

public static bitmap loadbitmapfromview(view v) {     bitmap bitmap;     v.setdrawingcacheenabled(true);     bitmap = bitmap.createbitmap(v.getdrawingcache());     v.setdrawingcacheenabled(false);     return bitmap; }

and detect argb value particular pixel.

int pixel = bitmap.getpixel(x,y);

now can each channel with:

int alphavalue = color.alpha(pixel); int redvalue = color.red(pixel); int bluevalue = color.blue(pixel); int greenvalue = color.green(pixel);

https://stackoverflow.com/a/31775271/1979882


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