Romain, So, we understand each other and want the same things :-) Can you please provide an example or pseudocode of the animation framework doing this job? I'm missing the link between the XML tag you suggested and getting the numbers in the code. My animation is spinning an ImageView inside a Linear Layout ViewGroup. The View Group's center X and Y points are parameters used to set the rotation axis. How do I get those numbers? What exactly do the attributes look like in XML?
Thanks and regards, Beth On Jun 17, 10:40 pm, Romain Guy <[email protected]> wrote: > That's my point, don't try to compute the center position, just let the > animation framework do it for you by declaring your animation with the > correct values. > > > > > > On Wed, Jun 17, 2009 at 10:17 PM, Beth <[email protected]> wrote: > > > Thanks Romain. > > So, when does the first layout happen? The XML tip looks good but I > > cannot see how to use it to determine the centerpoint of my screen in > > the Java code. I thought I could get layout components and their > > dimensions after setContentView had done its work. My app animates a > > simple image view hosted in a Layout that uses the fill_parent width. > > Under that is a text view that doesn't move. The width of the > > animation is the entire screen and should change when there is a > > switch from portrait to landscape. How do I find my center point in a > > dynamic way? My current solution is to set up a landscape layout with > > a fixed width on the animation view so it is the same as the portrait > > orientation. What is the right way? > > > On Jun 11, 6:08 pm, Romain Guy <[email protected]> wrote: > > > You cannot do that from onCreate(), you have to wait for the first > > > layout to happen. Besides, you don't need to hard code values in > > > animation since you can use values relative to a view, or its parent. > > > For instance, in XML, you can use 50%p to say "50% of the size of the > > > parent" or 40% to say "40% of the size of the animated view." > > > > On Thu, Jun 11, 2009 at 4:57 PM, Beth Mezias<[email protected]> wrote: > > > > Hi there, > > > > Can a layout expert offer insight here? I have an animation in a > > lovely > > > > LinearLayout ViewGroup object that I get into Java from the XML using > > > > findViewById. It's working great most of the time. However, my first > > call > > > > to the animate function at the end of onCreate measures the width of > > this > > > > ViewGroup to be zero. What am I missing? The same object will return > > > > correct width measurements later in the thread of execution. How can I > > get > > > > the correct measure from onCreate? > > > > Because of this behavior I have hard-coded values into my application > > for > > > > the Center X which might work nicely on the current HTC devices and > > then > > > > blow up later, or it might look bad in Europe on devices with different > > > > screen sizes. I tried a number of things to solve this (force layout, > > varied > > > > animation cache persistence, getMeasuredWidth instead of getWidth, > > > > invalidate on the ViewGroup and parent). The layout and the > > component's > > > > measurements should be the same for onCreate as it is in another method > > in > > > > the Activity that responds to touch input from the user. Also note > > that if > > > > I navigate in the app to another activity, change orientation, and then > > > > return to the first activity, this scenario also causes the ViewGroup's > > > > getWidth command to be zero. That is why I assume the issue is related > > to > > > > onCreate. > > > > How do I get the correct measure of a (linearlayout) component when > > > > executing from onCreate? Is there something in the window's drawing > > > > sequence that I need to workaround? > > > > Any tips or suggestions are most welcome. > > > > Regards, > > > > Beth > > > > -- > > > Romain Guy > > > Android framework engineer > > > [email protected] > > > > Note: please don't send private questions to me, as I don't have time > > > to provide private support. All such questions should be posted on > > > public forums, where I and others can see and answer them > > -- > Romain Guy > Android framework engineer > [email protected] > > Note: please don't send private questions to me, as I don't have time to > provide private support. All such questions should be posted on public > forums, where I and others can see and answer them --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-beginners?hl=en -~----------~----~----~----~------~----~------~--~---
