android–ListView和带倒数计时器的项目

概述我的Listview有问题,我想为所有ListView的项目设置一个倒数计时器,我已经用Google搜索了一个解决方案,但它无法正常工作.问题是ListView重用(回收)一个视图,我总是得到一个错误的项目时间.我使用标签作为我的观点,但它仍然不起作用,我无法理解我在哪里犯了错误,请帮助我.谢谢.所以

我的ListvIEw有问题,我想为所有ListVIEw的项目设置一个倒数计时器,我已经用Google搜索了一个解决方案,但它无法正常工作.问题是ListVIEw重用(回收)一个视图,我总是得到一个错误的项目时间.我使用标签作为我的观点,但它仍然不起作用,我无法理解我在哪里犯了错误,请帮助我.谢谢.

所以这里有一张图片显示我的问题：
pic1我刚开始活动的地方;

pic2我只是向下滚动

在这里我的代码(全班)：

更新

    public class PromoListActivity extends SherlockActivity {private ListVIEw mPromoList;private Promolistadapter mAdapter;private VIEwFlipper mFlipper;private button mBtnRepeat;@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.fragment_news_List);    getSupportActionbar().setdisplayHomeAsUpEnabled(true);    setTitle("Сохранённые акции");    mFlipper = (VIEwFlipper) findVIEwByID(R.ID.flipper);    mPromoList = (ListVIEw) findVIEwByID(R.ID.newsList);    mBtnRepeat = (button) findVIEwByID(R.ID.btnRepeat);    //-->    final Handler timerHandler = new Handler();    Runnable timerRunnable = new Runnable() {        @OverrIDe        public voID run() {            mAdapter.notifyDataSetChanged();            timerHandler.postDelayed(this, 1000); // run every minute        }    };    //<--    mBtnRepeat.setonClickListener(new OnClickListener() {        @OverrIDe        public voID onClick(VIEw arg0) {            mFlipper.setdisplayedChild(0);            getDummyData();        }    });    mPromoList.setonItemClickListener(new OnItemClickListener() {        @OverrIDe        public voID onItemClick(AdapterVIEw<?> arg0, VIEw arg1, int arg2, long arg3) {            startActivity(new Intent(PromoListActivity.this, PromoActivityDetails.class));        }    });    getDummyData();}private class Promolistadapter extends BaseAdapter {    private ArrayList<PromoAction> mItems = new ArrayList<PromoAction>();    private LayoutInflater layoutInflater;    private Promolistadapter(Context context, ArrayList<PromoAction> mItems) {        layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);        this.mItems = mItems;    }    public int getCount() {        return mItems.size();    }    public PromoAction getItem(int position) {        return mItems.get(position);    }    public long getItemID(int position) {        return position;    }    public VIEw getVIEw(int position, VIEw convertVIEw, VIEwGroup parent) {        VIEwItem vIEwItem;        PromoAction promoAction = getItem(position);        if (convertVIEw == null) {            vIEwItem = new VIEwItem();            convertVIEw = layoutInflater.inflate(R.layout.ListvIEwitem_action, null);            vIEwItem.name = (TextVIEw) convertVIEw.findVIEwByID(R.ID.promoAction_name);            vIEwItem.desc = (TextVIEw) convertVIEw.findVIEwByID(R.ID.promoAction_desc);            vIEwItem.timer = (TextVIEw) convertVIEw.findVIEwByID(R.ID.promoAction_timer);            vIEwItem.timer.setTag(position);            convertVIEw.setTag(vIEwItem);        } else {            vIEwItem = (VIEwItem) convertVIEw.getTag();        }        setTime(promoAction,vIEwItem.timer,vIEwItem.timer.getTag().toString());        vIEwItem.name.setText(promoAction.name);        vIEwItem.desc.setText(promoAction.descr);        return convertVIEw;    }    private voID setTime(final PromoAction promoAction, final TextVIEw tv, final String tag) {        if (tv.getTag().toString().equals(tag)) {            long outputTime = Math.abs(promoAction.timer_end                    - System.currentTimeMillis());            Date date = new java.util.Date(outputTime);            String result = new SimpleDateFormat("hh:mm:ss").format(date);            tv.setText(result);        }    }    public class VIEwItem {        TextVIEw name;        TextVIEw desc;        TextVIEw timer;    }}private voID getDummyData() {    ArrayList<PromoAction> List = new ArrayList<PromoAction>();    for (int i = 1; i < 10; i++) {        PromoAction action = new PromoAction();        action.name = "Lorem ipsum dolor sit amet";        action.descr = "Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incIDIDunt ut labore et dolore magna aliqua. ";        switch (i) {        case 1: {            action.timer_start = 1385971000;            action.timer_end = 1386104000;        }        case 2: {            action.timer_start = 1385889000;            action.timer_end = 1385812550;            break;        }        case 3: {            action.timer_start = 1385884200;            action.timer_end = 1385912100;            break;        }        default: {            action.timer_start = 1385856000;            action.timer_end = 1385892000;            break;        }        }        List.add(action);    }    mAdapter = new Promolistadapter(PromoListActivity.this, List);    mPromoList.setAdapter(mAdapter);    mFlipper.setdisplayedChild(1);}

}

解决方法:

在我的情况下,我解决了这个问题.我没有在你的getVIEw()中设置一个计时器处理程序,而是在每次调用getVIEw()时设置当前时间和你想要的TextVIEw所需时间之间的时差.所以将你的代码移回getVIEw()：

long outputTime = Math.abs(promoAction.timer_end                    - System.currentTimeMillis());Date date = new java.util.Date(outputTime);String result = new SimpleDateFormat("hh:mm:ss").format(date);tv.setText(result);

然后在活动中创建一个处理程序,在ListvIEw的适配器上每隔一分钟调用notifyDatasetChanged()：

Handler timerHandler = new Handler();Runnable timerRunnable = new Runnable() {    @OverrIDe    public voID run() {        myAdapter.notifyDataSetChanged();        timerHandler.postDelayed(this, 60000); //run every minute    }};

我在onPause()上停止了这个处理程序：

@OverrIDeprotected voID onPause() {    timerHandler.removeCallbacks(timerRunnable);    super.onPause();}

我在onResume()上再次启动它：

@OverrIDeprotected voID onResume() {    timerHandler.postDelayed(timerRunnable, 500);    super.onResume();}

就是这样. 总结

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