android 在旧设备上跳过简单动画

Question

我有一个 RecyclerView，其中有多个 TextViews 和一个 Button。该按钮触发动画，如下图所示：

我通过创建一个 RecyclerView.Adapter 和创建一个 OnClickListener 来做到这一点，如下所示：

public class recyclerViewAdapter extends RecyclerView.Adapter<recyclerViewAdapter.ViewHolder> {
    private ArrayList<MyObject> objects;
    // constructor and other stuff ...

    public void setDefaultRequestBtnClickListener(View.OnClickListener defaultRequestBtnClickListener) {
        this.defaultRequestBtnClickListener = defaultRequestBtnClickListener;
    }

    @Override
    public void onBindViewHolder(@NonNull final ViewHolder holder, int position) {
        MyObject object = objects.get(position);

        if (object.getRequestBtnClickListener() != null) {
            holder.Btn.setOnClickListener(object.getRequestBtnClickListener());
        }else {
            holder.Btn.setOnClickListener(defaultRequestBtnClickListener);
        }
    }

    public class ViewHolder extends RecyclerView.ViewHolder{

        TextView value;
        TextView currentVal;
        TextView Btn;
        ConstraintLayout parent;

        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            value = itemView.findViewById(R.id.totalPrice);
            currentVal = itemView.findViewById(R.id.checkBtn);
            Btn = itemView.findViewById(R.id.animateBtn);
            parent = itemView.findViewById(R.id.parent);
        }

        public void bind(final OnMyClickListener listener) {
            parent.setOnClickListener(new View.OnClickListener() {
                @Override public void onClick(View v) {
                    listener.onMyClick(v, getLayoutPosition());
                }
            });
        }

    }

     public interface OnMyClickListener{
        void onMyClick(View view, int position);

    }
}

这会在回收器视图中创建视图持有者并将其绑定到 TextView 和按钮。目前，用户必须单击该元素才能激活 Btn 和动画。以下是启动适配器的片段：

    @Nullable
    @Override
    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
        final View rootView = inflater.inflate(R.layout.frag_object_layout, container, false);

        final RecyclerView recyclerView = rootView.findViewById(R.id.list);
        final ArrayList<MyObject> objects = MyObject.getTestingList();
        final recyclerViewAdapter adapter =  new recyclerViewAdapter(objects, getContext());
        recyclerView.setAdapter(adapter);
        recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));

        adapter.setDefaultRequestBtnClickListener(new View.OnClickListener(){

            @Override
            public void onClick(View view) {
                recyclerViewAdapter.ViewHolder holder = (recyclerViewAdapter.ViewHolder) recyclerView.findViewHolderForAdapterPosition(Position);

                if (holder != null) {
                    if (holder.value.getAlpha() == 0.0f) {
                        holder.value.animate().alpha(1.0f).setDuration(500);
                        holder.value.animate().translationY(-38).setDuration(1000);
                        holder.checkValue.animate().translationY(38).setDuration(1000);
                    } else {
                        holder.value.animate().alpha(0.0f).setDuration(500);
                        holder.value.animate().translationY(0).setDuration(500);
                        holder.checkValue.animate().translationY(0).setDuration(500);
                    }
                }
            }
        });

        adapter.setOnMyClickListener(new recyclerViewAdapter.OnMyClickListener() {
            @Override
            public void onMyClick(View view, int pos) {
                Position = pos;
                holder = (recyclerViewAdapter.ViewHolder) recyclerView.findViewHolderForAdapterPosition(Position);

            }
        });


        return rootView;
    }
}

这在模拟器上运行良好，但在旧设备上动画会跳过，视图会直接转到最终位置。这是为什么？我检查了处理时间，它低于 16 毫秒的阈值。

我该如何改进？

（在这里发布整个代码很困难。索取代码，我会更新问题）

Answer 1

这里的问题是我是以编程方式执行此操作的。出于某种原因，如果我调用 Animator 对象并传递 anim xml 文件，则动画有效（在旧设备上）。有谁知道为什么？

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