Is there a way to stop the center point of a view from dragging off the screen using onTouch move events?
I can detect the point but I need the logic to stop the view moving and then re-joining the drag when the user swipes backwards. Setting a boolean will disable the move events which is no good, and setting the view back to a known good point is jumpy.
There are no answers anywhere on this so I'm wondering if it is even possible...
You can use this to make your view restricted to the screen boundaries.
int width=v.getLayoutParams().width;;
int height=v.getLayoutParams().height;
switch (event.getAction()) {
case MotionEvent.ACTION_DOWN:
dX = v.getX() - event.getRawX();
dY = v.getY() - event.getRawY();
return true;
case MotionEvent.ACTION_MOVE:
if (width == windowWidth && height == windowHeight){}
else {
v.animate()
.x(event.getRawX() + dX)
.y(event.getRawY() + dY)
.setDuration(0)
.start();
if (event.getRawX() + dX + width > windowWidth) {
v.animate()
.x(windowWidth - width)
.setDuration(0)
.start();
}
if (event.getRawX() + dX < 0) {
v.animate()
.x(0)
.setDuration(0)
.start();
}
if (event.getRawY() + dY + height > windowHeight) {
v.animate()
.y(windowHeight - height)
.setDuration(0)
.start();
}
if (event.getRawY() + dY < 0) {
v.animate()
.y(0)
.setDuration(0)
.start();
}
return true;
}
where v is the view in onTouchListener