Question

In my application I have thee tabs in the ViewFlipper.
When the activity is started I initialize all the tabs and the views inside of them.

But the problem is at the 3th tab. On the initialization of this tab, I want to know the distance of an TextView to it parents left side. Therefor I call the TextView.getLeft().

But when this tab isn’t shown I receive ‘0’ from this method. Therefor I can not initialize the view correctly.

Now it becomes strange:
When I start the activity to the first tab, then go to the third, the getLeft return 0 of startup and on tab click….
But when I start the activity to the third tab, the getLeft returns a valid value….

So, how can I get the correct value?
I guess the ViewFlipper doesn’t have the correct X,Y coordinates of views when the tab isn’t shown.

Ps. It was hard to explain. If I need to clarify something, please let me know.

Answer 1

I noticed that the getLeft was called before! the tab actually got executed. (The call was after setDisplayedChild() )

Therefor I needed to know when the view is actually shown.
I added an AnimationListener on the InAnimation:

ViewFlipper.getInAnimation().setAnimationListener(new AnimationListener() {

    public void onAnimationStart(Animation animation) {
         TextView.getLeft();
    }

    public void onAnimationRepeat(Animation animation) {}
    public void onAnimationEnd(Animation animation) {}
});

I don’t really like this sollution. But it works.