Question

我正在使用导航组件在两个片段之间导航，一个片段带有一个RecyclerView，该片段显示其余项目，另一个片段应显示其余细节。

我想为标题图像和其余名称实现共享的转换行为。我已经设法实现了（列表->详细信息）过渡，但是我在没有帮助的情况下尝试了很多用于返回过渡（详细信息->列表）的解决方案。

RestsListFragment的代码

@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    postponeEnterTransition();
    if (getActivity() != null) {
        mViewModel = ViewModelProviders.of(getActivity()).get(SearchViewModel.class);
        setupObservers();
        initializeRecycler();
        initializeSwipeLayout();
        if(allRestsList == null)
        mViewModel.getAllRests();
    }
}

这是我初始化回收站的方式

public void initializeRecycler() {
    mAllRestsAdapter = new AllRestsAdapter(getContext());
    mAllRestsAdapter.setSearchOperation(this);
    allRestsRecyclerView.setAdapter(mAllRestsAdapter);
    LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
    allRestsRecyclerView.setLayoutManager(layoutManager);
    allRestsRecyclerView.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
        @Override
        public boolean onPreDraw() {
            startPostponedEnterTransition();
            return true;
        }
    });
}

这是回收站项目点击的回调

@Override
public void goToDetail(TextView textView, ImageView imageView, int id, int pos, AllRestsModel.Data data) {
    position_detail = pos;
    Bundle bundle = new Bundle();
    bundle.putInt("position", pos);
    bundle.putInt("id", id);
    bundle.putString("cover", data.getCover());
    bundle.putString("name", data.getName());

    FragmentNavigator.Extras extras = new FragmentNavigator.Extras.Builder()
            .addSharedElement(imageView, "image" + id)
            .addSharedElement(textView, "name" + id)
            .build();

    NavHostFragment.findNavController(this).navigate(R.id.action_master_istrahti_list_to_istrahti_details, bundle, null, extras);
}

RestDetailsFragment

@Override
public void onActivityCreated(@Nullable Bundle savedInstanceState) {
    super.onActivityCreated(savedInstanceState);
    postponeEnterTransition();
    mViewModel = ViewModelProviders.of(getActivity()).get(SearchViewModel.class);
    setupObservers();
    getRestDetails();
}

最后，这是我如何获取其余详细信息

private void getRestDetails() {
    Bundle bundle = getArguments();
    if (bundle != null) {
        int position = getArguments().getInt("position");
        int id = getArguments().getInt("id");
        mCoverUri = getArguments().getString("cover");
        String name = getArguments().getString("name");

        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
            restDetailsIv.setTransitionName("image"+id);
            restDetailsNameTv.setTransitionName("name"+ id);
        }

        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.KITKAT) {
            Transition transition = TransitionInflater.from(getContext()).inflateTransition(android.R.transition.move);
            setSharedElementEnterTransition(transition);
            setSharedElementReturnTransition(transition);
        }

        restDetailsNameTv.setText(name);
        Glide.with(getContext())
                .load(Constants.STORAGE_API + mCoverUri)
                .placeholder(R.drawable.splash)
                .centerCrop()
                .addListener(new RequestListener<Drawable>() {
                    @Override
                    public boolean onLoadFailed(@Nullable GlideException e, Object model, Target<Drawable> target, boolean isFirstResource) {
                        return false;
                    }

                    @Override
                    public boolean onResourceReady(Drawable resource, Object model, Target<Drawable> target, DataSource dataSource, boolean isFirstResource) {
                        startPostponedEnterTransition();
                        return false;
                    }
                })
                .into(restDetailsIv);

        mViewModel.getRest(id + "");
    }
}

导航组件中的返回转换不起作用

0 个答案: