Hello!
Lots of android devs are using this tutorial from the Google documentation to try to achieve a card flip animation, and they’re getting errors, including this one:
05-22 11:32:34.706: E/AndroidRuntime(6801): java.lang.RuntimeException: Unknown animation name: objectAnimator
There does not appear to be a definitive answer that I can find as to how to get this to work. I got it. This is the relevant portion of my build file:
| repositories{ | |
| flatDir{ | |
| dirs 'libs' | |
| } | |
| } | |
| dependencies { | |
| //Design and Aminations | |
| compile 'com.android.support:cardview-v7:23.1.1' | |
| compile (name:'library-2.4.1', ext:'aar') | |
| compile 'com.android.support:support-v13:21.0.+' | |
| compile 'com.nineoldandroids:library:2.4.0' | |
| ... | |
| } |
You’ll notice that I mention this library in the build. I downloaded it, rather than access it on bintray, to hedge against changes in its availability, and put it in the build/libs directory of my app.
When I go to flip in/out the child fragments, my parent fragment has this click listener on my flip button:
| flipButton.setOnClickListener(new View.OnClickListener() { | |
| @Override | |
| public void onClick(View view) { | |
| if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) { | |
| if (mCardSideShowing.equals(CardSide.FRONT)) { | |
| getActivity().getFragmentManager() | |
| .beginTransaction() | |
| .setCustomAnimations(R.animator.card_flip_right_in, R.animator.card_flip_right_out, R.animator.card_flip_left_in, R.animator.card_flip_left_out) | |
| .replace(R.id.card_fragment_container, new CardBackFragment()) | |
| .commit(); | |
| mCardSideShowing = CardSide.BACK; | |
| } else if (mCardSideShowing.equals(CardSide.BACK)) { | |
| getActivity().getFragmentManager() | |
| .beginTransaction() | |
| .setCustomAnimations(R.animator.card_flip_right_in, R.animator.card_flip_right_out, R.animator.card_flip_left_in, R.animator.card_flip_left_out) | |
| .replace(R.id.card_fragment_container, new CardFrontFragment()) | |
| .commit(); | |
| mCardSideShowing = CardSide.FRONT; | |
| } | |
| } | |
| } | |
| }); |
If you’re been banging your head against this (like I did at first), please pay it forward and share this with another Android dev who might like to know.
