那些遇到过的问题

快速浏览时，Recycler View显示错误的数据。

Sai*_*ait 0 android recycler-adapter android-recyclerview recyclerview-layout

我有一个RecycleView地方，我对细胞有三种不同的看法。RView首次加载时，数据可以完美显示。当我开始滚动时，它会更改视图颜色。尝试了不同的方法，但无法解决。 原始观点。 错误的看法

public class TimelineRecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {

private static final int DATE_LAYOUT = 1;
private static final int EVEN_LAYOUT = 2;
private static final int ODD_LAYOUT = 3;
private List<TimeLineResponseDO.content> contents = new ArrayList<>();
Context context;
LayoutInflater layoutInflater;
private boolean isVisible = false;
private ConnectionDetector connectionDetector;
private ProgressDialog progressDialog;
private Fragment fragment1;
DateFormat inputFormat;
DateFormat outputFormat;
int counterOnCreate = 0;
int counterOnBind = 0;
public interface OpenSubmissionDetails{
    void openSubmissionDetails(String submissionId);
}
public interface IGetTimeLineData {
    void getTimeLineData(String date);

    void loadSnackBar(String msg);

}
public ProgressDialog getProgressDialog(Context context){
    if (progressDialog == null) {
        progressDialog = new ProgressDialog(context);
        progressDialog.setCancelable(false);
        progressDialog.setMessage(context.getString(R.string.loading_message));
    }
    return progressDialog;
}
IGetTimeLineData getTimeLineData;
public IGetTimeLineData getGetTimeLineData() {
    return getTimeLineData;
}
public void setGetTimeLineData(IGetTimeLineData getTimeLineData) {
    this.getTimeLineData = getTimeLineData;
}
OpenSubmissionDetails openSubmissionDetails;
public OpenSubmissionDetails getOpenSubmissionDetails() {
    return openSubmissionDetails;
}
public void setOpenSubmissionDetails(OpenSubmissionDetails openSubmissionDetails) {
    this.openSubmissionDetails = openSubmissionDetails;
}
public TimelineRecyclerAdapter(List<TimeLineResponseDO.content> contents, Context context, Fragment fragment, IGetTimeLineData iGetTimeLineData) {
    this.contents = contents;
    this.context = context;
    this.fragment1 = fragment;
    this.getTimeLineData = iGetTimeLineData;
    layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);

    connectionDetector = new ConnectionDetector(context);
}

public class TimelineDateHolder extends RecyclerView.ViewHolder{


    Button date;


    public TimelineDateHolder(View convertView) {
        super(convertView);

        date = (Button) convertView.findViewById(R.id.date);
    }

    public void bindViews(TimeLineResponseDO.content response){

            Date date1 = null;

            try {

                SimpleDateFormat simpleDateFormat = new SimpleDateFormat("DD-MM-yyyy");

                long dateLong = System.currentTimeMillis();

                String da = simpleDateFormat.format(dateLong);

                Log.e(" Date is :- ", da);

                if (response.getDate().equals(da)){
                    date.setText("Today");
                }
                else {
                    if (!TextUtils.isEmpty(response.getDate()))
                        date.setText(response.getDate());
                }

            }catch (Exception e){
                e.printStackTrace();
                if (!TextUtils.isEmpty(response.getDate()))
                    date.setText(response.getDate());
            }

    }

}

public class TimelineRecyclerEvenHolder extends RecyclerView.ViewHolder{


    RelativeLayout evenContainer;
    TextView subjectTypeEven, timingEven, subjectEven, locationEven, teacherEven, cancelTextEven;
    Button submissionEven, notificationEven ,submissionEvenDetails ;
    ImageView pointerEven, imgCancelBtnEven, imgDelayBtnEven, imgNotificationBtnEven;
    View verticalLine;

    public TimelineRecyclerEvenHolder(View convertView) {
        super(convertView);

        evenContainer = (RelativeLayout) convertView.findViewById(R.id.evenContainer);
        subjectTypeEven = (TextView) convertView.findViewById(R.id.subjectTypeEven);
        timingEven = (TextView) convertView.findViewById(R.id.timingEven);
        subjectEven = (TextView) convertView.findViewById(R.id.subjectEven);
        locationEven = (TextView) convertView.findViewById(R.id.locationEven);
        teacherEven = (TextView) convertView.findViewById(R.id.teacherEven);
        pointerEven = (ImageView) convertView.findViewById(R.id.circleEven);
        submissionEven = (Button) convertView.findViewById(R.id.submissionEven);
        submissionEvenDetails = (Button) convertView.findViewById(R.id.submissionEvenDetails);
        imgCancelBtnEven = (ImageView) convertView.findViewById(R.id.cancelBtnEven);//#sp 29-09-2016 added
        imgDelayBtnEven = (ImageView) convertView.findViewById(R.id.delayBtnEven);//#sp 30-09-2016 added
        imgNotificationBtnEven = (ImageView) convertView.findViewById(R.id.notificationBtnEven);//#sp 30-09-2016 added
        notificationEven = (Button) convertView.findViewById(R.id.notificationEven);//#sp 04-10-2016 added
        cancelTextEven = (TextView) convertView.findViewById(R.id.cancelTextEven);

        subjectTypeEven.setTypeface(NotifyApplication.getExoSemiBold(context));
        timingEven.setTypeface(NotifyApplication.getExoSemiBold(context));
        subjectEven.setTypeface(NotifyApplication.getExoSemiBold(context));
        locationEven.setTypeface(NotifyApplication.getExoSemiBold(context));
        teacherEven.setTypeface(NotifyApplication.getExoSemiBold(context));

        cancelTextEven.setTypeface(NotifyApplication.getExoSemiBold(context));



    }

    public void bindViews(TimeLineResponseDO.content response, TimelineRecyclerEvenHolder holder){
            holder.evenContainer.setVisibility(View.VISIBLE);

            if (!TextUtils.isEmpty(response.getSubjectType())) {
                holder.subjectTypeEven.setText(response.getSubjectType());
                Log.d("Ifeven", "" + response.getSubjectType());
            }

            if (response.getLectureSubmission().equals(Enum.LectureSubmission.Submission.toString())) {
                holder.subjectTypeEven.setText(Enum.LectureSubmission.Submission.toString());
                Log.d("ElseIfeven", "" + response.getSubjectType());

            }
            Log.d("LectureSubmEven", "" + response.getLectureSubmission());

            if (!TextUtils.isEmpty(response.getRoomNo()))
                holder.locationEven.setText(response.getRoomNo());

            if (!TextUtils.isEmpty(response.getSubject()))
                holder.subjectEven.setText(response.getSubject());

            if (Boolean.valueOf(StorageService.getInstance().getString("IS_STUDENT")))
            {
                if (!TextUtils.isEmpty(response.getTeacherAbbreviation()))
                    holder.teacherEven.setText(response.getTeacherAbbreviation());
            }
            else   if (Boolean.valueOf(StorageService.getInstance().getString("IS_TEACHER")))
            {
                if (!TextUtils.isEmpty(response.getCourse()))
                    holder.teacherEven.setText(response.getCourse());
            }

            if (!TextUtils.isEmpty(response.getStartTime() + context.getString(R.string.timelineHypen) + response.getEndTime()))
                holder.timingEven.setText(response.getStartTime() + context.getString(R.string.timelineHypen) + response.getEndTime());

            holder.pointerEven.setBackgroundResource(R.drawable.timeline_pointer_left);

            holder.timingEven.setCompoundDrawablesWithIntrinsicBounds(R.drawable.timeline_timing, 0, 0, 0);

            Log.d("resp isSubmission", "" + response.isSubmission());
            if (response.isSubmission()) {
                holder.submissionEven.setVisibility(View.VISIBLE);
                holder.submissionEven.setText(response.getSubmissionCount() + " Submission");

            } else {
                holder.submissionEven.setVisibility(View.GONE);
            }
            Log.d("resp Noti", "" + response.isNotiification());
            if (response.isNotiification()) {
                holder.notificationEven.setVisibility(View.VISIBLE);
            } else {
                holder.notificationEven.setVisibility(View.GONE);
            }

            if (response.getLectureSubmission().equals("Submission")) {
                holder.submissionEvenDetails.setVisibility(View.VISIBLE);
            } else {
                holder.submissionEvenDetails.setVisibility(View.GONE);
            }

            if (response.isCancelled()) {
                ChangeFontColorEven(holder);
            }

            if (response.getSubmissionStatus() != null) {
                if (response.getSubmissionStatus().equals("No")) {
                    ChangeFontColorEven(holder);
                }
            }

        if (response.isEvenLayout()) {
            if (response.getLectureSubmission().equals("Submission")) {
                holder.imgDelayBtnEven.setImageResource(R.drawable.pencil);
            } else {
                holder.imgDelayBtnEven.setImageResource(R.drawable.delay);
            }
        }

        if (!TextUtils.isEmpty(response.getTrnLectureId())) {
            submissionLoadId(response);
        }

        holder.notificationEven.setText(response.getNotificationCount() + " Notifications");

        if (isVisible) {
            if (!response.isDateContainer()) {
                if (response.getLectureSubmission().equals("Submission") && !TextUtils.isEmpty(response.getLectureSubmission())) {
                    if (response.getSubmissionStatus().equals("No")) {
                        ShowHideEditLectureIconsEven(holder, View.GONE);
                    } else {
                        ShowHideEditLectureIconsEven(holder, View.VISIBLE);
                    }
                } else {
                    if (response.isCancelled()) {
                        ShowHideEditLectureIconsEven(holder, View.GONE);

                    } else {
                        ShowHideEditLectureIconsEven(holder, View.VISIBLE);
                    }
                }

            }
        }else {
            ShowHideEditLectureIconsEven(holder, View.GONE);
        }

    }

}

public class TimelineRecyclerHolder extends RecyclerView.ViewHolder{


    RelativeLayout oddContainer;
    TextView subjectTypeOdd, timingOdd, subjectOdd, locationOdd, teacherOdd, tvCancelTextOdd;
    Button submissionOdd, notificationOdd , submissionOddDetails;
    ImageView pointerOdd, imgCancelBtnOdd, imgDelayBtnOdd, imgNotificationBtnOdd;
    View verticalLine;

    public TimelineRecyclerHolder(View convertView) {
        super(convertView);

        oddContainer = (RelativeLayout) convertView.findViewById(R.id.oddContainer);
        subjectTypeOdd = (TextView) convertView.findViewById(R.id.subjectTypeOdd);
        timingOdd = (TextView) convertView.findViewById(R.id.timingOdd);
        subjectOdd = (TextView) convertView.findViewById(R.id.subjectOdd);
        locationOdd = (TextView) convertView.findViewById(R.id.locationOdd);
        teacherOdd = (TextView) convertView.findViewById(R.id.teacherOdd);
        pointerOdd = (ImageView) convertView.findViewById(R.id.circleOdd);
        submissionOdd = (Button) convertView.findViewById(R.id.submissionOdd);
        submissionOddDetails = (Button) convertView.findViewById(R.id.submissionOddDetails);

        imgCancelBtnOdd = (ImageView) convertView.findViewById(R.id.cancelBtnOdd);
        imgDelayBtnOdd = (ImageView) convertView.findViewById(R.id.delayBtnOdd);  
        imgNotificationBtnOdd = (ImageView) convertView.findViewById(R.id.notificationBtnOdd);
        notificationOdd = (Button) convertView.findViewById(R.id.notificationOdd);
        tvCancelTextOdd = (TextView) convertView.findViewById(R.id.cancelTextOdd);

        subjectTypeOdd.setTypeface(NotifyApplication.getExoSemiBold(context));
        timingOdd.setTypeface(NotifyApplication.getExoSemiBold(context));
        subjectOdd.setTypeface(NotifyApplication.getExoSemiBold(context));
        locationOdd.setTypeface(NotifyApplication.getExoSemiBold(context));
        teacherOdd.setTypeface(NotifyApplication.getExoSemiBold(context));

        tvCancelTextOdd.setTypeface(NotifyApplication.getExoSemiBold(context));



    }

    public void bindViews(TimeLineResponseDO.content response, TimelineRecyclerHolder holder){
            //holder.verticalLine.setVisibility(View.VISIBLE);
            holder.oddContainer.setVisibility(View.VISIBLE);

            if (!TextUtils.isEmpty(response.getSubjectType())) {
                holder.subjectTypeOdd.setText(response.getSubjectType());

            }

            if (response.getLectureSubmission().equals(Enum.LectureSubmission.Submission.toString())) {
                holder.subjectTypeOdd.setText(Enum.LectureSubmission.Submission.toString());
            }

            if (!TextUtils.isEmpty(response.getRoomNo()))
                holder.locationOdd.setText(response.getRoomNo());

            if (!TextUtils.isEmpty(response.getSubject()))
                holder.subjectOdd.setText(response.getSubject());

            if (Boolean.valueOf(StorageService.getInstance().getString("IS_STUDENT")))
            {
                if (!TextUtils.isEmpty(response.getTeacherAbbreviation()))
                    holder.teacherOdd.setText(response.getTeacherAbbreviation());
            }
            else   if (Boolean.valueOf(StorageService.getInstance().getString("IS_TEACHER")))
            {
                if (!TextUtils.isEmpty(response.getCourse()))
                    holder.teacherOdd.setText(response.getCourse());
            }

            if (!TextUtils.isEmpty(response.getStartTime() + context.getString(R.string.timelineHypen) + response.getEndTime()))
                holder.timingOdd.setText(response.getStartTime() + context.getString(R.string.timelineHypen) + response.getEndTime());


            holder.pointerOdd.setBackgroundResource(R.drawable.timeline_pointer_right);

            holder.timingOdd.setCompoundDrawablesWithIntrinsicBounds(R.drawable.timeline_timing, 0, 0, 0);

            if (response.isSubmission()) {
                holder.submissionOdd.setVisibility(View.VISIBLE);
                holder.submissionOdd.setText(response.getSubmissionCount() + " Submission");

            } else {
                holder.submissionOdd.setVisibility(View.GONE);
            }
            if (response.isNotiification()) {
                holder.notificationOdd.setVisibility(View.VISIBLE);
            } else {
                holder.notificationOdd.setVisibility(View.GONE);
            }

            if (response.getLectureSubmission().equals("Submission")) {
                holder.submissionOddDetails.setVisibility(View.VISIBLE);
            } else {
                holder.submissionOddDetails.setVisibility(View.GONE);
            }

            if (response.isCancelled()) {
                ChangeFontColor(holder, Enum.LayoutType.Odd);
            }

            if (response.getSubmissionStatus() != null) {
                if (response.getSubmissionStatus().equals("No")) {
                    ChangeFontColor(holder, Enum.LayoutType.Odd);
                }
            }

            if (response.getLectureSubmission().equals("Submission")) {
                holder.imgDelayBtnOdd.setImageResource(R.drawable.pencil);
            } else {
                holder.imgDelayBtnOdd.setImageResource(R.drawable.delay);
            }

        if (!TextUtils.isEmpty(response.getTrnLectureId())) {
            submissionLoadId(response);
        }

        holder.notificationOdd.setText(response.getNotificationCount() + " Notifications");

        if (isVisible) {
            if (!response.isDateContainer()) {
                if (response.getLectureSubmission().equals("Submission") && !TextUtils.isEmpty(response.getLectureSubmission())) {
                    if (response.getSubmissionStatus().equals("No")) {
                        ShowHideEditLectureIcons(holder, View.GONE);
                    } else {
                        ShowHideEditLectureIcons(holder, View.VISIBLE);
                    }
                } else {
                    if (response.isCancelled()) {
                        ShowHideEditLectureIcons(holder, View.GONE);

                    } else {
                        ShowHideEditLectureIcons(holder, View.VISIBLE);
                    }
                }

            }
        }else {
            ShowHideEditLectureIcons(holder, View.GONE);
        }

    }

}

@Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {

    switch (viewType){
        case DATE_LAYOUT:
            View convertView = LayoutInflater.from(parent.getContext()).inflate(R.layout.timeline_date_header, parent, false);
            return new TimelineDateHolder(convertView);
        case EVEN_LAYOUT:
            View convertView1 = LayoutInflater.from(parent.getContext()).inflate(R.layout.timeline_even_layout_child, parent, false);
            return new TimelineRecyclerEvenHolder(convertView1);
        default:
            View convertView2 = LayoutInflater.from(parent.getContext()).inflate(R.layout.timeline_odd_layout_child, parent, false);
            return new TimelineRecyclerHolder(convertView2);
    }

}

@Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {

    final int itemType = getItemViewType(position);

    TimeLineResponseDO.content content = contents.get(position);

    switch (itemType){
        case DATE_LAYOUT:
            ((TimelineDateHolder) holder).bindViews(content);
            break;
        case EVEN_LAYOUT:
            ((TimelineRecyclerEvenHolder) holder).bindViews(content, (TimelineRecyclerEvenHolder) holder);
            break;
        default:
            ((TimelineRecyclerHolder) holder).bindViews(content, (TimelineRecyclerHolder) holder);
            break;
    }

    if (position == (contents.size() - 1)) {
        if (connectionDetector.isConnectingToInternet()) {
            getTimeLineData.getTimeLineData(content.getContentDate());
        }
        else {
            getTimeLineData.loadSnackBar(context.getString(R.string.no_internet_connection_schedule));
        }
    }
}

@Override
public int getItemCount() {
    return contents.size();
}

@Override
public int getItemViewType(int position) {
    if (contents.get(position).isDateContainer()){
        return DATE_LAYOUT;
    }
    else if (contents.get(position).isEvenLayout()){
        return EVEN_LAYOUT;
    }
    else {
        return ODD_LAYOUT;
    }
}

private void ChangeFontColor(TimelineRecyclerHolder holder, Enum.LayoutType layoutType) {
    switch (layoutType){
        case Even:
            break;
        case Odd:
            holder.subjectTypeOdd.setTextColor(context.getResources().getColor(android.R.color.holo_red_dark));
            holder.timingOdd.setTextColor(context.getResources().getColor(android.R.color.holo_red_dark));
            holder.pointerOdd.setBackgroundResource(R.drawable.timeline_pointer_right_red);
            holder.subjectOdd.setTextColor(context.getResources().getColor(android.R.color.holo_red_dark));
            holder.locationOdd.setVisibility(View.GONE);
            holder.teacherOdd.setVisibility(View.GONE);
            holder.tvCancelTextOdd.setVisibility(View.VISIBLE);
            holder.tvCancelTextOdd.setTextColor(context.getResources().getColor(android.R.color.holo_red_dark));
            holder.submissionOdd.setVisibility(View.GONE);
            holder.submissionOddDetails.setVisibility(View.GONE);

            break;
    }

}

private void ChangeFontColorEven(TimelineRecyclerEvenHolder holder) {
    holder.subjectTypeEven.setTextColor(context.getResources().getColor(android.R.color.holo_red_dark));
    holder.timingEven.setTextColor(context.getResources().getColor(android.R.color.holo_red_dark));
    holder.pointerEve

Kev*_*vie 5

RecyclerViewAdapter 回收其视图，因此该行为非常值得期待。

当我阅读您的代码时，发现您编写的if语句else不像：

        if (!TextUtils.isEmpty(response.getRoomNo()))
            holder.locationEven.setText(response.getRoomNo());

        if (!TextUtils.isEmpty(response.getSubject()))
            holder.subjectEven.setText(response.getSubject());
Run Code Online (Sandbox Code Playgroud)

如果在新加载的视图之前的位置中的视图不满足该if语句，则将重用这些方法。

尝试添加else到您的每个if语句中。通过添加，else我的意思是添加类似

else {
    holder.locationEven.setText("");
}

// OR

else {
    holder.locationEven.setVisibility(View.GONE);
}
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