FragmentTransation setCustomAnimations not working

问题:

I trying to use the new android compatibility package to include fragments into my project. I am trying to include a transition animation when I add a new fragment. The thing is only one of my animation work. The In animation works but the Out animation doesn't work. I read somewhere that it is a bug in the compatibility package. But I also read that the bug was fixed in the 3rd revision of the compatibility package. Can anyone help me with this issue

In Animation

<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/anticipate_interpolator"
android:fromXDelta="0"
android:toXDelta="0"
android:fromYDelta="100%"        
android:toYDelta="0%"
android:duration="1000"/>

Out Animation

<translate xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/accelerate_interpolator"
android:fromXDelta="0"
android:toXDelta="0"
android:zAdjustment="top"
android:fromYDelta="0%"        
android:toYDelta="100%"
android:duration="1000"/>

This is the code I use to add fragments

newFragment = new HelloWorldFragment();
FragmentTransaction ft = getSupportFragmentManager().beginTransaction();
ft.setCustomAnimations(R.anim.bottom_top_animation, R.anim.top_bottom_animation);
ft.add(R.id.outer_layout, newFragment);
ft.addToBackStack(null);
ft.commit();

回答1:

This works in the current version of the library, but it was definitely broken previously. You can use something like this:

final FragmentManager fm = getSupportFragmentManager();
final FragmentTransaction ft = fm.beginTransaction();
ft.setCustomAnimations(R.anim.slide_up, R.anim.slide_down, R.anim.slide_up, R.anim.slide_down)
  .add(R.id.fragment_container, new SomeFragment(), FRAGMENT_TAG)
  .addToBackStack(FRAGMENT_TAG)
  .commit();

where R.anim.slide_up is your in animation and R.anim.slide_down is your out animation. The second pair of params (3 and 4) for setCustomAnimations allow you to specify the pop in/out animations for popping the backstack (e.g., when the user presses back, the fragment will animate away with the animation specified as the fourth param).

回答2:

I have found a workaround for this. Override onCreateAnimation(int transit, boolean enter, int nextAnim) in your fragment class then its working fine.

@Override
public Animation onCreateAnimation(int transit, boolean enter, int nextAnim) {
    return enter ? AnimationUtils.loadAnimation(getActivity(), R.anim.grow_fade_in_center) : AnimationUtils.loadAnimation(getActivity(), R.anim.shrink_fade_out_center);
}

回答3:

I am facing the same problem too, here's my situation:

1. I want to do some UI change after exit animation. but I found that exit animation didn't work. my UI change codes are in onBackPressed().

my solution is as following:

1. move UI change logic in onCreateAnimator(). and then exit animation works.