Question

我正在尝试构建产品列表并动态更改产品状态，但是当我单击一个开关而另一个并返回以单击第一个时，它会在firebase中同时更改这两个值应用程序。我该如何解决这个问题？

我的产品片段类：

public class ProductsFragment extends Fragment {
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container,
                             Bundle savedInstanceState) {

        mRecyclerView = (RecyclerView) view.findViewById(R.id.recycler_product);
        mRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));

        //Setting adapter and Holder
        mAdapter = new FirebaseRecyclerAdapter<Product, ProductHolder>(options) {
            @Override
            public ProductHolder onCreateViewHolder(ViewGroup parent, int viewType) {
                View view = LayoutInflater.from(parent.getContext())
                        .inflate(R.layout.item_product_list, parent, false);
                return new ProductHolder(view);
            }

            @Override
            protected void onBindViewHolder(@NonNull ProductHolder holder, final int position,
                                            @NonNull final Product model) {
                    holder.mAvailableSwitch.setChecked(model.isAvailable());
                    holder.mAvailableSwitch.setOnCheckedChangeListener(
                            new CompoundButton.OnCheckedChangeListener() {
                                @Override
                                public void onCheckedChanged(CompoundButton compoundButton, boolean b) {
                                    updateStatus(model, b);
                                }
                            });
            }

            //Update product status
            public void updateStatus(Product product,
                                     boolean available) {

                String key = product.getUid();
                Map<String, Object> childUpdates = new HashMap<>();
                childUpdates.put(FirebaseUtils.getProductsPath() + key + "/available",
                        available); 
                mBaseRef = FirebaseUtils.getBaseRef();
                mBaseRef.updateChildren(childUpdates);
        }
        mRecyclerView.setAdapter(mAdapter);
        return view;
    }

    public class ProductHolder extends RecyclerView.ViewHolder {
        public Switch mAvailableSwitch;
        public ProductHolder(View view) {
            super(view);

            mAvailableSwitch = (Switch) view.findViewById(R.id.product_available);
        }
    }

item_product_list.xml

  <LinearLayout
       android:layout_width="match_parent"
       android:layout_height="match_parent"
       android:orientation="horizontal">

       <Switch
           android:id="@+id/product_available"
           android:layout_width="wrap_content"
           android:layout_height="wrap_content"
           android:layout_weight="1" />

</FrameLayout>

Answer 1

解决了！只需在updateChildren（）调用时添加addOnSuccessListener或addOnCompletedListener，并调用方法notifyItemChaged（）;

firestore示例：

holder.mAvailableSwitch.setOnCheckedChangeListener(
        new CompoundButton.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(CompoundButton compoundButton, final boolean b) {
                DocumentReference productRef =
                        new FirebaseUtils().productRef().document(model.getUid());
                Map<String, Object> map = new HashMap<>();
                map.put("available", b);
                Log.d(TAG, "onCheckedChanged: " + model.getUid());

                productRef.update(map).addOnSuccessListener(new OnSuccessListener<Void>() {
                    @Override
                    public void onSuccess(Void aVoid) {
                        model.setAvailable(b);
                        notifyItemChanged(position, model);
                    }
                });
            }
        });

动态更改切换值

1 个答案: