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RecyclerView中的异步RecyclerView

android-recyclerview asynchronous android java

woshitom · 技术社区 · 6 年前

我的产品存储在ElasticSearch数据库中。所有这些产品都有1级分类(例如运动)和2级分类(例如足球)。

我想将所有类别级别2都按它们各自的类别级别1进行存储,以获得此类输出:

Category 1
Category 1_1
category 1_2

Category 2
category 2_1
Category 2_2

...

Category n
Category n_1
Category n_2

为此,我首先运行一个查询,以获取存储在json数组categorylevelone中的所有不同类别级别1的列表,使用这些数据,我正在填充一个名为categorylevelonerecyclerviewapter的回收器视图:

RecyclerView CategoryLevelOneRecyclerViewAdapter = view.findViewById(R.id.rvCategoryLevelOne);
CategoryLevelOneRecyclerViewAdapter.setLayoutManager(new LinearLayoutManager(getApplicationContext(), LinearLayoutManager.VERTICAL, false));
adapterCategoryLevelOne = new CategoryLevelOneRecyclerViewAdapter(getApplicationContext(), categoryLevelOne, mIdShop);
CategoryLevelOneRecyclerViewAdapter.setAdapter(adapterCategoryLevelOne);

在这些类别级别1的onBindViewHolder上,我正在运行一个新查询,以获取属于该类别级别1的所有类别级别2,并填充一个名为categoryleveltworyclerviewapter的新recyclerview:

@Override
    public void onBindViewHolder(CategoryLevelOneRecyclerViewAdapter.ViewHolder holder, int position) {
        final ViewHolder holderTemp = holder;
        String currentCategoryLevelOne = null;
        try {

            currentCategoryLevelOne = mCategoryLevelOne.getString(position);

            String query = "some elasticsearch query to get the corresponding categories level 2";
            String endPoint = "some elasticsearch endpoing";

            final String finalCurrentCategoryLevelOne = currentCategoryLevelOne;
            NetworkManager.getInstance().GetElasticSearchData(query, endPoint, new VolleyListener<String>()
            {
                @Override
                public void getResult(String result)
                {
                    if (!result.isEmpty()) {
                        try {
                            JSONArray JSONresult = new JSONArray(result);

                            holderTemp.textViewCategoryName.setText(finalCurrentCategoryLevelOne);
                            RecyclerView.LayoutManager gridCategory = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
                            CategoryLevelTwoRecyclerViewAdapter.setLayoutManager(gridCategory);
                            CategoryLevelTwoRecyclerViewAdapter adapter = new CategoryLevelTwoRecyclerViewAdapter(getApplicationContext(), JSONresult);

                            CategoryLevelTwoRecyclerViewAdapter.setAdapter(adapter);
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }

                    }
                }
            });

        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

我想,因为对elasticsearch的调用是异步的,所以只有最后一个类别级别1需要由某些类别级别2(甚至不属于它)填充。

当我向下滚动时,它们都被填充,但顺序不受尊重(例如,应该属于类别1的类别2最终会出现在类别1中)

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