android-如何从ArrayAdapter中删除项目？

概述在我的应用程序中,我应该使用ListView和ArrayAdapter来显示一些列表.(我不应该使用RecyclerView,所以不建议我使用它).我想在计时器接收到0时删除此项目.publicclassAuctionTodayListAdapterextendsBaseAdapter{privateTextViewproName,progressTxt,txtPercent,

在我的应用程序中,我应该使用ListVIEw和ArrayAdapter来显示一些列表. (我不应该使用RecyclerVIEw,所以不建议我使用它).

我想在计时器接收到0时删除此项目.

public class AuctionTodaylistadapter extends BaseAdapter {    private TextVIEw proname, progresstxt, txtPercent, txtPrice2, txtStartPrice, txtPrice, progressFinishedTxt,            text_vIEw_169622, price, timeVIEw, edtUsername, today_inputPriceTxt, today_basePriceTxt,            txtDate, under10_priceTxt;    private CustomBadge bIDCount, offerCount;    private Progressbar progressbar;    private ImageVIEw GoodPic, userPic, User;    private CountdownVIEw countdownVIEw;    public AuctionTodaylistadapter(@NonNull Context context, @LayoutRes int resource, @NonNull List<TodayGmodel> objects) {        super(context, resource, objects);    }    @Suppresslint("SetTextI18n")    @NonNull    @OverrIDe    public VIEw getVIEw(final int position, @Nullable VIEw convertVIEw, @NonNull VIEwGroup parent) {        final TodayGmodel model = (TodayGmodel) datas.get(position);        VIEw vIEw;        if (convertVIEw != null)            vIEw = convertVIEw;        else            vIEw = VIEw.inflate(context, layout, null);        Constants.setFont(parent);        df = new DecimalFormat(",###.##");        Log.e("todayTimer", model.getCalculateEnd() + "");        proname = (TextVIEw) vIEw.findVIEwByID(R.ID.text_vIEw_16962);        progresstxt = (TextVIEw) vIEw.findVIEwByID(R.ID.progresstxt);        txtPercent = (TextVIEw) vIEw.findVIEwByID(R.ID.txtPercent);        txtPrice2 = (TextVIEw) vIEw.findVIEwByID(R.ID.txtPrice2);        txtPrice = (TextVIEw) vIEw.findVIEwByID(R.ID.txtPrice);        text_vIEw_169622 = (TextVIEw) vIEw.findVIEwByID(R.ID.text_vIEw_169622);        txtStartPrice = (TextVIEw) vIEw.findVIEwByID(R.ID.txtStartPrice);        countdownVIEw.setonCountdownIntervalListener(1000, new CountdownVIEw.OnCountdownIntervalListener() {            @OverrIDe            public voID onInterval(CountdownVIEw cv, long remainTime) {                if (remainTime < 10000 && remainTime > 0) {                    winnerLay.setVisibility(VIEw.GONE);                    ListItem_winnerLay.setVisibility(VIEw.GONE);                    ListItem_todayUpper10Lay.setVisibility(VIEw.GONE);                    ListItem_todayPriceLay.setVisibility(VIEw.VISIBLE);                    ListItem_under10Lay.setVisibility(VIEw.VISIBLE);                    under10_priceTxt.setText(df.format(model.getPrice()) + "Dollar");                    progressbar.setMax((int) timeInMillis / 1000);                    isRunning = true;                    countDownTimer = new CountDownTimer(timeInMillis, 100) {                        @OverrIDe                        public voID onTick(long millisUntilFinished) {                            progresstxt.setText("" + String.valueOf(Math.round(millisUntilFinished * 0.001f)));                            progressbar.setProgress(Math.round(millisUntilFinished * 0.001f));                        }                        @OverrIDe                        public voID onFinish() {                        }                    }.start();                    countDownTimer.start();                }                if (remainTime < 0) {                    startTimer();                    remove(position);                    notifyDataSetChanged();                }            }        });

我写这段代码删除：

        if (remainTime < 0) {            startTimer();            remove(position);            notifyDataSetChanged();        }

但对我不起作用,也没有删除任何项目！

如何从适配器中删除物品？

解决方法:

我认为您可以使用此：

if (remainTime < 0) {        startTimer();      // your List object        datas.remove(position);        notifyDataSetChanged();    }

嘿,如果不工作,那么我为您创建了一个示例.如果您可以共享xml文件或正确的代码,则它可以正常工作,那么我们可以轻松地为您提供帮助,否则您可以像这样使用.

public class MainActivity extends AppCompatActivity {EditText textVIEw;  ArrayList<Integer> newArrayList;@OverrIDeprotected voID onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentVIEw(R.layout.activity_main);    newArrayList = new ArrayList<>();    newArrayList.add(R.mipmap.ic_launcher);    newArrayList.add(R.mipmap.ic_launcher);    newArrayList.add(R.mipmap.ic_launcher);    newArrayList.add(R.mipmap.ic_launcher);    newArrayList.add(R.mipmap.ic_launcher);    newArrayList.add(R.mipmap.ic_launcher);    newArrayList.add(R.mipmap.ic_launcher);    newArrayList.add(R.mipmap.ic_launcher);    GrIDVIEw simpleGrID = (GrIDVIEw) findVIEwByID(R.ID.simpleGrIDVIEw);    AuctionTodaylistadapter customAdapter = new AuctionTodaylistadapter(newArrayList);    simpleGrID.setAdapter(customAdapter);}public class AuctionTodaylistadapter extends BaseAdapter {    Context context;    private TextVIEw proname, progresstxt, txtPercent, txtPrice2, txtStartPrice, txtPrice, progressFinishedTxt,            text_vIEw_169622, price, timeVIEw, edtUsername, today_inputPriceTxt, today_basePriceTxt,            txtDate, under10_priceTxt;    ArrayList<Integer> newString;    public AuctionTodaylistadapter(ArrayList<Integer> objects) {        newString = objects;        context = MainActivity.this;    }    @OverrIDe    public int getCount() {        return newString.size();    }    @OverrIDe    public Object getItem(int position) {        return null;    }    @OverrIDe    public long getItemID(int position) {        return 0;    }    @OverrIDe    public VIEw getVIEw(final int position, @Nullable VIEw convertVIEw, @NonNull VIEwGroup parent) {        LayoutInflater inflter = (LayoutInflater.from(getApplicationContext()));        VIEw vIEw = inflter.inflate(R.layout.activity_grID, null);//set layout for displaying items        ImageVIEw icon = (ImageVIEw) vIEw.findVIEwByID(R.ID.icon);        icon.setimageResource(newString.get(position));        icon.setonClickListener(new VIEw.OnClickListener() {            @OverrIDe            public voID onClick(VIEw v) {                newString.remove(position);                notifyDataSetChanged();            }        });        return vIEw;    }}}

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