How to know when lottie animation is completed?

问题

I have a fragment, here is the onCreateView method:

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    mView = inflater.inflate(R.layout.fragment_added_to_cart_anim, container, false);
    ButterKnife.bind(this, mView);

    mAddedToCartAnimation.setAnimation("checked_done_.json");
    mAddedToCartAnimation.loop(false);
    mAddedToCartAnimation.playAnimation();

    // Remove fragment when animation is finished.


    return mView;
}

I need to remove the fragment using getActivity().getSupportFragmentManager().beginTransaction().remove(this).commit(); when the lottie animation has ended. If I understand correctly, when the isAnimating() lottie method returns false the animation has ended and since in my configuration the animation does not loop this is when I should remove the current fragment. But I can't just use an if statement since when it is executed the animation may still be going.

I need a way to remove the fragment when the lottie animation ends, how do I do this?

回答1:

This code works for me:

mAddedToCartAnimation.addAnimatorListener(new Animator.AnimatorListener() {
        @Override
        public void onAnimationStart(Animator animation) {
            Log.e("Animation:","start");
        }

        @Override
        public void onAnimationEnd(Animator animation) {
            Log.e("Animation:","end");
            //Your code for remove the fragment
            try {
                getActivity().getSupportFragmentManager()
                      .beginTransaction().remove(this).commit();
            } catch(Exception ex) {
                ex.toString();
            }
        }

        @Override
        public void onAnimationCancel(Animator animation) {
            Log.e("Animation:","cancel");
        }

        @Override
        public void onAnimationRepeat(Animator animation) {
            Log.e("Animation:","repeat");
        }
    });

I hope this solve your problem :)

回答2:

that simple in your my_layout.xml

 <RelativeLayout
   android:id="@+id/contanierForAnimationId"
   android:layout_width="50dp"
   android:layout_height="50dp"
   android:visibility="visible">
      <com.airbnb.lottie.LottieAnimationView
          android:id="@+id/aLottieAnimationId"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          app:lottie_autoPlay="false"
          app:lottie_fileName="animation.json"
          app:lottie_repeatCount="0" />
</RelativeLayout>

in your my_class.kt

var aLottieAnimationId : LottieAnimationView? = null
var contanierForAnimationId: RelativeLayout? = null

override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, 
savedInstanceState: Bundle?): View? {

    val view = inflater.inflate( R.layout.my_Layout, container, false )
    aLottieAnimationId = view.findViewById(R.id.aLottieAnimationId) as LottieAnimationView
contanierForAnimationId = view.findViewById(R.id.contanierForAnimationId) as RelativeLayout


    aLottieAnimationId?.setOnClickListener {
      aLottieAnimationId?.setOnClickListener(null)
      aLottieAnimationId?.speed = 1f
      aLottieAnimationId?.playAnimation()
      aLottieAnimationId?.setMinAndMaxFrame(0, 90) //How many frames does the animation have
       aLottieAnimationId?.addAnimatorUpdateListener { valueAnimator ->
         // Set animation progress
           val progress = (valueAnimator.animatedValue as Float * 100).toInt()
           Log.d("progress :","$progress")
         //You must know How many frames does the animation have
           if (progress == 90) {
             contanierForAnimationId?.visibility = View.GONE
           }
       }
    } 


  return view
}

If you want to count animation frames precisely, use the LottieFiles website

来源：https://stackoverflow.com/questions/46180874/how-to-know-when-lottie-animation-is-completed

标签

android

android-fragments

lottie-android