I have the following problem:
I'm trying to transition from Fragment A to Fragment B. There is a shared element between these fragments in the form of a Button and some other View's (see layout).
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
xmlns:flipper="http://schemas.android.com/apk/res-auto"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.mypackage.view.IndicatorViewFlipper
android:transitionGroup="true"
android:id="@+id/intro_viewflipper"
android:layout_width="match_parent"
android:layout_height="match_parent"
flipper:indicatorColor="@color/white"
flipper:indicatorMargin="4dp"
flipper:indicatorRadius="4dp"
flipper:indicatorBarMargin="104dp"/>
<Button
android:id="@+id/account_create_btn"
style="?android:attr/borderlessButtonStyle"
android:textColor="@color/white"
android:layout_width="match_parent"
android:layout_height="@dimen/button_standard_height"
android:layout_above="@+id/txt_already_account"
android:background="@drawable/button_yellow_selector"
android:transitionName="create_account"
android:text="@string/account_create_btn"
android:textSize="24sp"
android:textAllCaps="false" />
<TextView
android:id="@+id/txt_already_account"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:layout_above="@+id/account_login_btn"
android:layout_marginTop="24dp"
android:text="@string/account_welcome_already_account"/>
<Button
android:id="@+id/account_login_btn"
style="?android:attr/borderlessButtonStyle"
android:layout_width="match_parent"
android:layout_height="@dimen/button_standard_height"
android:layout_marginTop="8dp"
android:layout_alignParentBottom="true"
android:transitionName="login"
android:background="@drawable/button_blue_selector"
android:textColor="@color/white"
android:textSize="24sp"
android:textAllCaps="false"
android:text="@string/account_create_login_btn"/>
</RelativeLayout>
What I'm trying to do is to let all the content in Fragment except for the shared element, transition (slide to the left) and let all the content form Fragment B except for the shared element slide in from the right. During this content transition I want the shared element to remain in its original position until the content transitions are done, and then let it slide to its new position in Fragment B.
This last behaviour is where it goes wrong: once I start the exit transition in Fragment A the shared element disappears and slides in from the right with the content transition of Fragment B. The behaviour of the shared element is correct if I don't add any exit/enter transitions.
The code (in Fragment A):
Fragment fragment = MyFragment.newInstance();
FragmentTransaction fragmentTransaction = getFragmentManager().beginTransaction();
fragmentTransaction.hide(this);
fragmentTransaction.add(R.id.frame_container, fragment, fragment.getClass().getSimpleName());
fragmentTransaction.addSharedElement(sharedElement, sharedElementTag);
Transition sharedElementTransaction = TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.move);
sharedElementTransaction.setStartDelay(400);
fragment.setSharedElementEnterTransition(sharedElementTransaction);
setExitTransition(new Slide(Gravity.LEFT).setDuration(200));
fragment.setEnterTransition(new Slide(Gravity.RIGHT).setDuration(200));
Can anyone help me get the desired behaviour?
Update:
I've made a work around that almost does what I want using animate() on my views to slide/fade them and on completion of this animation trigger the shared element transaction:
Transition sharedElementTransition = TransitionInflater.from(getActivity()).inflateTransition(android.R.transition.move);
sharedElementTransition.setStartDelay(400);
fragment.setSharedElementEnterTransition(sharedElementTransition);
setSharedElementReturnTransition(sharedElementTransition);
mLoginBtn.animate()
.x(-mLoginBtn.getWidth())
.setDuration(400)
.start();
viewFlipper.animate()
.x(-viewFlipper.getWidth())
.setDuration(400)
.setListener(new AnimatorListenerAdapter() {
@Override
public void onAnimationEnd(Animator animation) {
super.onAnimationEnd(animation);
transaction.commit();
}
})
.start();
fragment.setEnterSharedElementCallback(new SharedElementCallback() {
@Override
public void onSharedElementStart(List<String> sharedElementNames, List<View> sharedElements, List<View> sharedElementSnapshots) {
super.onSharedElementStart(sharedElementNames, sharedElements, sharedElementSnapshots);
viewFlipper.animate()
.x(0)
.setDuration(400)
.setListener(null)
.start();
mLoginBtn.animate()
.x(0)
.setDuration(400)
.start();
});
The problem with this solution is that I can't slide in the Views of the called Fragment so there I now just fade in the Views.
