我正在为我的ListView使用以下代码。

我的FragmentActivity

@Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
           View view = inflater.inflate(R.layout.home, container, false);
           listView = (ListView) view.findViewById(R.id.listView);
           listView.setAdapter(new CustomArrayAdapterForHome(mContext,questions));

           return view;
    }


这是ListView的适配器

@SuppressLint("DefaultLocale")
    public class CustomArrayAdapterForHome extends EndlessAdapter
    {
        private final LayoutInflater inflator;
        protected ImageLoader imageLoader;
        private DisplayImageOptions options;

        private RotateAnimation rotate=null;
        private View pendingView = null;

        public CustomArrayAdapterForHome(Context ctx,ArrayList<Question> questionList)
        {
            super( new ArrayAdapter<Question>(ctx, R.layout.question_adapter_layout, questionList));

            inflator = mContext.getLayoutInflater();
            imageLoader = ImageLoader.getInstance();

            options = new DisplayImageOptions.Builder()
                .cacheInMemory()
                .cacheOnDisc()
                .showImageForEmptyUri(R.drawable.user_male)
                .displayer(new RoundedBitmapDisplayer(5))
                .build();

            rotate=new RotateAnimation(0f, 360f, Animation.RELATIVE_TO_SELF,
                    0.5f, Animation.RELATIVE_TO_SELF,
                    0.5f);
            rotate.setDuration(600);
            rotate.setRepeatMode(Animation.RESTART);
            rotate.setRepeatCount(Animation.INFINITE);
        }

        class ViewHolder
        {
            // MY CODE
        }

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

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

        @Override
        public View getView(int position, View convertView, ViewGroup parent)
        {
            final Question question = questions.get(position);
            final OpenionUser myUser = question.getUser();
            // MY CODE


            return view;
        }



          @Override
          protected View getPendingView(ViewGroup parent)
          {
            View row = LayoutInflater.from(parent.getContext()).inflate(R.layout.row, null);

            pendingView = row.findViewById(android.R.id.text1);
            pendingView.setVisibility(View.GONE);
            pendingView=row.findViewById(R.id.throbber);
            pendingView.setVisibility(View.VISIBLE);
            startProgressAnimation();

            return(row);
          }


        private void startProgressAnimation()
        {
            if (pendingView!=null)
            {
                  pendingView.startAnimation(rotate);
            }
        }

        @Override
        protected void appendCachedData()
        {

        }

        @Override
        protected boolean cacheInBackground() throws Exception
        {
            getQuestions();
            return true;
        }
    }


上面的代码仅表现为没有调用简单的ListView,cacheInBackground或getPendingView。我还想添加一个headerView并且它也不起作用。

我在这里想念什么?

最佳答案

您在此处拥有的大多数代码都不属于EndlessAdapter。引用the documentation


它旨在环绕另一个适配器,在该适配器中您拥有“真实”数据。因此,它遵循装饰器模式,并通过新的Endless Technology(TM)扩展了当前的适配器。


因此,首先,创建一个常规的ArrayAdapter,并获取所需的所有样式和内容(例如,您的getView()实现)。然后,创建一个添加了“无尽”的EndlessAdapter子类。

注意:


EndlessAdapter子类不应覆盖getView(),因为这是添加无尽行为的地方
EndlessAdapter子类不应覆盖getCount(),因为它是由EndlessAdapter实现本身管理的


您可能希望检查the sample app以查看其如何实现EndlessAdapter子类。

或者,由于EndlessAdapter will not work with header views,您可能只需要切换到其他无限列表解决方案或自己滚动即可。

08-26 07:12