Animation freeze during reyclerview.notifyDataSetChanged();

[Guimareshh]

Hi there !

I'm using Lottie since months now and I found a strange issue today. In my fragment I have the Lottie animation already set, and using the animation to make the user wait during the call of API nor loading data from Realm. When it's done I animate the Lottie file to set the Alpha to 0 and call notifyDataSetChanged() for two recyclerView.

Here is the video

And here is my code :

binding.animationView.animate().alpha(0f).setDuration(250).start();

binding.fragmentDiscoverTextViewServices.setVisibility(View.VISIBLE);
binding.fragmentDiscoverTextViewDomaines.setVisibility(View.VISIBLE);

categoryAdapter.notifyDataSetChanged();
subCategoryAdapter.notifyDataSetChanged();

One of the RecyclerView has a lot of items (±50) and the other only 5.

And how the Lottie XML looks like :

<com.airbnb.lottie.LottieAnimationView
                android:id="@+id/animation_view"
                android:layout_width="@dimen/loader_size"
                android:layout_height="@dimen/loader_size"
                android:layout_marginTop="@dimen/spacing_extra_huge"
                app:layout_constraintLeft_toLeftOf="parent"
                app:layout_constraintRight_toRightOf="parent"
                app:layout_constraintTop_toBottomOf="@+id/fragment_discover_searchView"
                app:lottie_autoPlay="true"
                app:lottie_fileName="loader.json"
                app:lottie_loop="true" />

Any idea why this is happening ? Thanks for your help !

[gpeal]

@Guimareshh is your animation in the recyclerview?

[Guimareshh]

@gpeal no the animation is inside the ConstraintLayout, same level as the recyclerView. That's why I find this issue very strange

[gpeal]

@Guimareshh Can you attach a sample project that repros this?

[Guimareshh]

@gpeal I tried in a sample project to repro the same bug, but it was impossible. After trying few things in my main project I have found that it doesn't come from the notifyDataSetChanged();

It seems to be the Realm insertion that freeze the animation. Indeed the freeze is when I start to save my objects inside Realm :

DiscoverRest discoverRest = ServiceGenerator.createService(DiscoverRest.class, true);
        discoverRest
                .getCategories()
                .enqueue(new Callback<CategoryListResponse>() {
                    @Override
                    public void onResponse(Call<CategoryListResponse> call, Response<CategoryListResponse> response) {
                        if (response.isSuccessful()) {

                            Realm realm = Realm.getDefaultInstance();
                            for (final Category category : response.body().getCategories()) {
                                realm.executeTransaction(new Realm.Transaction() {
                                    @Override
                                    public void execute(Realm realm) {
                                        realm.copyToRealmOrUpdate(category);
                                    }
                                });
                                if (category.getSubCategories() != null) {
                                    for (final SubCategory subCategory : category.getSubCategories()) {
                                        subCategory.setIdCategory(category.getId());
                                        realm.executeTransaction(new Realm.Transaction() {
                                            @Override
                                            public void execute(Realm realm) {
                                                realm.copyToRealmOrUpdate(subCategory);
                                            }
                                        });
                                    }
                                }
                            }
                            loadFromRealm();

                        } else {
                            APIError error = ErrorUtils.parseError(response);
                            Toast.makeText(getActivity(), error.message(), Toast.LENGTH_LONG).show();
                        }
                    }

                    @Override
                    public void onFailure(Call<CategoryListResponse> call, Throwable t) {
                        Toast.makeText(getActivity(), getString(R.string.api_failed), Toast.LENGTH_LONG).show();
                    }
                });
    }

If I remove the Realm part and add the following code :

categories.addAll(response.body().getCategories());
categoryAdapter.notifyDataSetChanged();
binding.animationView.animate().alpha(0f).setDuration(250).start();

The Lottie animation doesn't freeze. For now, the solution will be to save objects with Realm after the animation has "gone".

[gpeal]

@Guimareshh This doesn't seem like a Lottie issue then. You may be able to use systrace or something to figure out why it's not working though.

[zhangjianhd]

I've met the question as you too.do nothing but notifyDataSetChanged,the animation freeze. lottie version is 6.2.0