视图适配器警告中的无条件布局膨胀

Question

我在我的警报对话框中使用 GridView 和下面的代码。它给了我标题中调用的错误。我的代码和更多必需的信息如下所示。

  private void showGotoPageDialog() {

        final Dialog mDialog = new Dialog(getActivity());
        mDialog.setContentView(R.layout.grid_dialogue);
        mDialog.getWindow().setLayout(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT);
        GridView mGridView = (GridView) mDialog.findViewById(R.id.grid_dialog);
        ArrayList<String> tmp = new ArrayList<>(mPageOptions.length);
        for(int i = 0; i < mPageOptions.length; i++)
        {
            tmp.add(mPageOptions[i].split(" ")[1]);
        }
        CustomAdapter adapter = new CustomAdapter(getActivity(), tmp, mPageIndx);
        //ArrayAdapter<String> adapter = new ArrayAdapter<String>(getActivity(), android.R.layout.simple_list_item_1, tmp);
        mGridView.setAdapter(adapter);
        mGridView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> adapterView, View view, int item, long l) {
                mDialog.dismiss();
                mPageIndx = item + 1;
                updateQuotesListServer();
                updatePageInfo();
            }
        });
        mDialog.show();
        TextView dismiss = (TextView) mDialog.findViewById(R.id.dialog_dismiss);
        dismiss.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                mDialog.dismiss();
            }
        });
    }

和这样的适配器

 private class CustomAdapter extends BaseAdapter
    {
        private ArrayList<String> list;
        private LayoutInflater inflater;
        private int currentPage;

        CustomAdapter(Activity activity, ArrayList<String> list, int currentPage)
        {
            this.list = new ArrayList<>();
            this.list.addAll(list);
            inflater = (LayoutInflater) activity.getSystemService(AppCompatActivity.LAYOUT_INFLATER_SERVICE);
            this.currentPage = currentPage;
        }

        public void setCurrentPage(int currentPage)
        {
            this.currentPage = currentPage;
        }

        @Override
        public int getCount() {
            return list.size();
        }

        @Override
        public Object getItem(int i) {
            return null;
        }

        @Override
        public long getItemId(int i) {
            return i;
        }

        @Override
        public View getView(int i, View view, ViewGroup viewGroup) {
            view = View.inflate(getActivity(),R.layout.dialogue_item, null);
            TextView txt = (TextView) view.findViewById(R.id.textview_dialogue);
            txt.setText(list.get(i));
            if(i == currentPage-1)
            {
                txt.setTextColor(Color.BLACK);
            }

            return view;
        }
    }

它在这条线上给我警告

view = View.inflate(getActivity(),R.layout.dialogue_item, null);

警告如下

Unconditional layout inflation from view adapter: Should use View Holder pattern (use recycled view passed into this method as the second parameter) for smoother scrolling.

我的代码按预期工作正常，我没有遇到任何问题。I want know that What changes require for fix this and what is benefit of it ?让我知道是否有人可以帮助我解决这个问题并解决我的疑问。

谢谢

Answer 1

视图适配器的构建是为了避免为每个项目创建一个新视图，而是可以重用滚动出屏幕的视图（它们通过 getView 的第二个参数传入）。你被警告你应该尝试重用这些视图而不是总是膨胀新的视图。将行更改为

if (view == null) view = View.inflate(getActivity(),R.layout.dialogue_item, null);