I'm try to zoom a FrameLayout with the following example from der android
developers site: http://developer.android.com/training/animation/zoom.html
My concrete Problem, in the first time the animation is right, is expand
from the thumbView, in the second time the animation comes from 'somewhere'
(middle/top to the center).
i have nearly the same, the differents are, i have an Framelayout instead
an ImageView and i extract the function to minimize the View back in an
extra Method. now thats looks like so:
private void zoomImageFromThumb(final View thumbView) {
if (mCurrentAnimator != null) {
mCurrentAnimator.cancel();
}
// here i building my custome layout
startBounds = new Rect();
final Rect finalBounds = new Rect();
final Point globalOffset = new Point();
thumbView.getGlobalVisibleRect(startBounds);
findViewById(R.id.container)
.getGlobalVisibleRect(finalBounds, globalOffset);
startBounds.offset(-globalOffset.x, -globalOffset.y);
finalBounds.offset(-globalOffset.x + 15, -globalOffset.y + 60);
float startScale;
if ((float) finalBounds.width() / finalBounds.height()
> (float) startBounds.width() / startBounds.height()) {
startScale = (float) startBounds.height() /
finalBounds.height();
float startWidth = startScale * finalBounds.width();
float deltaWidth = (startWidth - startBounds.width()) / 2;
startBounds.left -= deltaWidth;
startBounds.right += deltaWidth;
} else {
startScale = (float) startBounds.width() / finalBounds.width();
float startHeight = startScale * finalBounds.height();
float deltaHeight = (startHeight - startBounds.height()) / 2;
startBounds.top -= deltaHeight;
startBounds.bottom += deltaHeight;
}
thumbView.setAlpha(0f);
expandedImageView.setVisibility(View.VISIBLE);
expandedImageView.setPivotX(0f);
expandedImageView.setPivotY(0f);
AnimatorSet set = new AnimatorSet();
set
.play(ObjectAnimator.ofFloat(expandedImageView, View.X,
startBounds.left, finalBounds.left))
.with(ObjectAnimator.ofFloat(expandedImageView, View.Y,
startBounds.top, finalBounds.top))
.with(ObjectAnimator.ofFloat(expandedImageView,
View.SCALE_X,
startScale,
1f)).with(ObjectAnimator.ofFloat(expandedImageView,
View.SCALE_Y, startScale, 1f));
set.setDuration(mShortAnimationDuration);
set.setInterpolator(new DecelerateInterpolator());
set.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
mCurrentAnimator = null;
}
@Override
public void onAnimationCancel(Animator animation) {
mCurrentAnimator = null;
}
});
set.start();
mCurrentAnimator = set;
}
the startBounds Variable is global, cause i need this to know where the
position is for the minimize process. Here the minimize Method:
private void minimizeViewFromThumb(final View thumbView) {
if (mCurrentAnimator != null) {
mCurrentAnimator.cancel();
}
AnimatorSet set = new AnimatorSet();
set.play(ObjectAnimator
.ofFloat(expandedImageView, View.X,
startBounds.left))
.with(ObjectAnimator
.ofFloat(expandedImageView,
View.Y,startBounds.top))
.with(ObjectAnimator
.ofFloat(expandedImageView,
View.SCALE_X,
startScaleFinal))
.with(ObjectAnimator
.ofFloat(expandedImageView,
View.SCALE_Y,
startScaleFinal));
set.setDuration(mShortAnimationDuration);
set.setInterpolator(new DecelerateInterpolator());
set.addListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
thumbView.setAlpha(1f);
expandedImageView.setVisibility(View.GONE);
mCurrentAnimator = null;
}
@Override
public void onAnimationCancel(Animator animation) {
thumbView.setAlpha(1f);
expandedImageView.setVisibility(View.GONE);
mCurrentAnimator = null;
}
});
set.start();
mCurrentAnimator = set;
}
if i debug this whole process i can see that the method
getGlobalVisibleRect from the method zoomViewFromThumb give me another
value.
if i debug the line
finalBounds.offset(-globalOffset.x, -globalOffset.y);
in the first time the two parameters are 0 and -60 and in the second time
(after minimize and recreate there are 15 and 360.
i have no idea why thats happen.
i have try to set the View.X and View.Y parameter append from the given
thumbView, i have try to work with constant Values for the View.X, View.Y
parameter in the ObjectAnimator but nothing fix my problem.
now please help me.
Greets Manu
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