Android Application Development Tutorial - 133 - Overlay MotionEvent time Video Lecture | Android Application Development (Mobile App) - Software Development

what up guys welcome to 130 30 Android
tutorial for the new Boston what we're
just gonna work with this touch event
that we're getting from our overlay
class and some of the question or one of
the questions that you guys might be
asking is hey can I just do something
like map dot set onclicklistener
and then create a click method or set a
touch method the problem is again like I
told you guys in last tutorial is the
map is already handling so much stuff
that when we try to add like a click
listener it's not gonna properly work so
that's again why we want to use the
overlay class to handle some of those
events and I just pulled up briefly kind
of the overlay Javadoc that kind of
tells you the methods that we can use
and there's a draw method that we might
get into on a key down on key up on tap
and on touch event which is what we're
going to be working with we're still
gonna kind of reference the keydown and
keyup but in a different way through the
event motion event so that's kind of
what's uh what methods overlay class has
for now there's a few different types of
overlays which we'll get into but again
we have this on touch method or on touch
event method and what we're gonna do is
we're gonna set up some variables and
they're both gonna be long so we're
gonna say a long starting point or just
start and we're gonna set this actually
let's set this up at the top yeah it
looks like I already did so just create
two new variables start and stop and
what that's gonna do is when we press
down on our map which is actually our
overlay that we're pressing down it's
gonna create a start starting point
we're going to get kind of the time when
we hit the down button and when we
release and we're that's gonna be our
stop and then we're gonna - those I'll
just get into I don't wanna you know
sometimes that gets confusing my trying
to explain things before we actually do
them so let's just get into it so again
what we want in this touch what this
touch event method is going to give us
is
a motion event in the map view so let's
reference the motion event when we say
the motion is pressed down so we're just
gonna say if and then our event we
called e get action is equal to the
motion event dot action down again this
will be when we're pressing down on our
overlay what we're gonna do is we're
gonna get the starting point or the time
for the most part when that event
happens so what we're gonna do is we're
gonna set our start equal to e dot get
event time which is a new method that we
haven't used yet that's probably the
sole you know key key point of this
tutorial is just getting the event time
when an event happens so that's pretty
you know it's pretty good method even
for like games and stuff like that if
you want to judge the Floss of velocity
of you know how fast someone moves from
one point to the next you can do it this
way but again we're gonna set up another
if statement when they release so we're
gonna say e
dot get fit get fit get action equals
motion event dot action action up
alright right there so now when we
release we're gonna set up our ending
points so we're just gonna say stop is
equal to again our event when this event
happens action up happens dot get event
time and lastly all we're gonna do is
subtract this time from this time and if
it's greater than you know like a second
and a half then we're gonna we're gonna
do some sort of a method which we're
gonna create allert dialogue which we
kind of talked about but we're gonna go
into a little bit more depth in the next
tutorial but so what we're gonna say a
stop - start as long as that's greater
than one and a half seconds again it's
in milliseconds here so this is one and
a half
seconds we're going to perform an action
well I'm not even leave a comment
because it's getting late and I don't
really it doesn't really matter but
here's again this is all we're doing for
this tutorial is we have our event which
is an overlay type because we extended
overlay and we get the motion event and
we're going to get when they press down
and when they press up and if that total
time is greater than one-and-a-half
seconds we're gonna do something here
otherwise it's going to return false
that this this hasn't been handled for
the most part but that's pretty much it
for this tutorial again guys i'll
kitchen the next one we're gonna get
into alert diet alert dialogue a little
bit more in depth than we have it
because the last time I use it I thought
I explained it earlier but I don't think
I did so I'll get you guys in that
tutorial and have a good one