java - How to create clickable lines in android -

java - How to create clickable lines in android -

if utilize line :

canvas.drawline(stx,sty, spx,spy);

how can later observe illustration motionevent whether line touched or not? let's assume line not straight.

i know there things rect or rectf can handle events can't draw slope lines.

maybe suggest me alternative method draw lines object used handle events...

well after night research seems way go switch canvas opengl es api.

and yet foul trail...

but after giving sec though if have

line ( point ( x1, y1 ), point2 ( x2, y2))

like loving mother, math comes understanding , simple answare, simple line of code can determine wheather event point contained in line:

(x2 - x1)(eventy - y1) = (y2 - y1) (eventx - x1);

to blur touch area can add:

for(int = -10; i<10;i++){ for(int j=-10; j<10; j++){ if((x2 - x1)*(eventy+i - y1) == (y2 - y1)* (eventx+j - x1)) homecoming true;}}

java android canvas graphics event-handling