java - 如何在没有初始动画的情况下更新 ListView 内的 SpeedView？

Question

所以我有一个带有三个速度 View 仪表的 fragment 。 Picture of fragment它们曾经直接位于 fragment 中并且可以正常工作，但是在我需要添加 TextView 之后，我无法让所有内容都适合屏幕，因此我决定创建一个自定义布局并使用 ListView 来显示它们。

过去更新速度表非常容易，一切都运行良好。

将所有内容添加到 ListView 后，我认为更新所有内容的唯一方法是在适配器上使用notifyDataSetChanged()，但是当我这样做时，仪表指示器会捕捉到0并上升到所需的数字那里。我尝试过使用支架来解决这个问题，但没有成功。

这是有关如何创建适配器的 fragment 代码

@Override
    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
        super.onViewCreated(view, savedInstanceState);
        OEEsegmentList = (ListView) view.findViewById(R.id.OEEplusLV);

        qualitySegment = new OEEListSegment("Quality", OEEqualityValueString, "Bad parts: "+OEEqualityBadPartsValueString, "Total parts: "+OEEqualityTotalPartsValueString);
        availabilitySegment = new OEEListSegment("Availability", OEEavailabilityValueString, "Downtime: "+OEEavailabilityDowntimeValueString, "Next time: "+OEEavailabilityNextTimeValueString);
        performanceSegment = new OEEListSegment("Performance", OEEperformanceValueString, "Act time: "+OEEperformanceActTimeValueString, "Takt time: "+OEEperformanceTaktTimeValueString);

        OEEsegmentArrayList = new ArrayList<>();
        OEEsegmentArrayList.add(qualitySegment);
        OEEsegmentArrayList.add(availabilitySegment);
        OEEsegmentArrayList.add(performanceSegment);

        OEEadapter = new OEEListAdapter(getActivity(), R.layout.oee_list_layout, OEEsegmentArrayList);
        OEEsegmentList.setAdapter(OEEadapter);

    }

这是更新函数之一，它们基本上都是相同的代码，但名称不同。当我收到有关特定标记被更改的消息时，我会在主要 Activity 中调用它们。

public void updateOEEplusAvailability (String availability) {
        OEEavailabilityValueString=availability;

        availabilitySegment.setSegmentValueDial(OEEavailabilityValueString);

        OEEadapter.notifyDataSetChanged();
    }

这是我的整个列表适配器

public class OEEListAdapter extends ArrayAdapter<OEEListSegment> {
    private Context mContext;
    int mResource;
    public ArrayList<OEEListSegment> mSegments ;

    public OEEListAdapter(@NonNull Context context, int resource, @NonNull ArrayList<OEEListSegment> objects) {
        super(context, resource, objects);
        mContext = context;
        mResource = resource;
        mSegments=objects;
    }

    @NonNull
    @Override
    public View getView(int position, View convertView,  ViewGroup parent) {
        final ViewHolder holder;
        holder = new ViewHolder();

        String name = getItem(position).getSegmentName();
        String valueDial = getItem(position).getSegmentValueDial();
        String valueTV1 = getItem(position).getSegmentValueTV1();
        String valueTV2 = getItem(position).getSegmentValueTV2();

        final OEEListSegment Segment = new OEEListSegment(name, valueDial, valueTV1, valueTV2);

        LayoutInflater inflater = LayoutInflater.from(mContext);
        convertView = inflater.inflate(mResource, parent, false);

        TextView textViewName = (TextView) convertView.findViewById(R.id.textViewSegmentName);

        holder.speedView = (SpeedView) convertView.findViewById(R.id.segmentSpeedView);
        holder.textViewFirst = (TextView) convertView.findViewById(R.id.textViewSegmentFirst);
        holder.textViewSecond=(TextView) convertView.findViewById(R.id.textViewSegmentSecond);
        convertView.setTag(holder);
        holder.textViewFirst.setText(mSegments.get(position).getSegmentValueTV1());
        holder.textViewSecond.setText(mSegments.get(position).getSegmentValueTV2());
        holder.speedView.speedTo(Float.parseFloat(mSegments.get(position).getSegmentValueDial()));


        holder.speedView.clearSections();
        holder.speedView.addSections(
                new Section(.3f, Color.RED)
                , new Section(.7f, Color.YELLOW)
                , new Section(1f, Color.GREEN));


        textViewName.setText(name);
        holder.textViewFirst.setText(valueTV1);
        holder.textViewSecond.setText(valueTV2);
        holder.speedView.speedTo(Float.parseFloat(valueDial));

        return convertView;
    }

    @Override
    public int getViewTypeCount() {
        return getCount();
    }

    @Override
    public int getItemViewType(int position) {

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

    public Object getItemCustom(int position) {
        return mSegments.get(position);
    }

    @Override
    public long getItemId(int position) {
        return 0;
    }

    private class ViewHolder {

        protected SpeedView speedView ;
        private TextView textViewFirst ;
        private TextView textViewSecond;

    }
}

这是列表段代码

public class OEEListSegment implements  Parcelable {
    private String name;
    private String valueDial;
    private String valueTV1;
    private String valueTV2;

    public OEEListSegment(String name, String valueDial, String valueTV1, String valueTV2) {
        this.name=name;
        this.valueDial=valueDial;
        this.valueTV1=valueTV1;
        this.valueTV2=valueTV2;
    }

    public String getSegmentName() {
        return name;
    }
    public void setSegmentName(String name) {
        this.name=name;
    }

    public String getSegmentValueDial() {
        return valueDial;
    }
    public void setSegmentValueDial(String valueDial) {
        this.valueDial=valueDial;
    }

    public String getSegmentValueTV1() {
        return valueTV1;
    }
    public void setSegmentValueTV1(String valueTV1) {
        this.valueTV1=valueTV1;
    }

    public String getSegmentValueTV2() {
        return valueTV2;
    }
    public void setSegmentValueTV2(String valueTV2) {
        this.valueTV2=valueTV2;
    }


    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeStringArray(new String[] {this.name, this.valueDial, this.valueTV1, this.valueTV2});
    }

    private void readFromParcel(Parcel in) {
        name = in.readString();
        valueDial= in.readString();
        valueTV1= in.readString();
        valueTV2= in.readString();
    }

    public OEEListSegment(Parcel in){
        String[] data = new String[4];

        in.readStringArray(data);
        // the order needs to be the same as in writeToParcel() method
        this.name = data[0];
        this.valueDial= data[1];
        this.valueTV1= data[2];
        this.valueTV2= data[3];
    }
    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
        public OEEListSegment createFromParcel(Parcel in) {
            return new OEEListSegment(in);
        }

        public OEEListSegment[] newArray(int size) {
            return new OEEListSegment[size];
        }
    };
}

任何解决方案将不胜感激。如何阻止初始动画(0 到所需的数字)在速度 View 中发生，或者如何更新 ListView 以使动画不会发生。

或者最好完全省略 ListView ，同时仍然获得所需的布局(只有 3 个段)。

Answer 1

我无法在列表段内完成我需要做的事情，但由于我知道我希望显示该段的确切次数，所以我决定改变我的方法。

我在主布局中添加了一个 scoll View ，然后在其中包含了 3x 段布局。然后我需要像这样通过 ID 访问所有组件来访问段(布局)

performanceLayout = view.findViewById(R.id.performanceSegment);

像这样访问我的段内的元素

speedViewPerformance= performanceLayout.findViewById(R.id.segmentSpeedView);

然后我可以用这样的功能更新 speeviews

 public void updateOEEplusPerformance (String performance) {
    OEEperformanceValueString=performance;
    speedViewPerformance.speedTo(Float.parseFloat(OEEperformanceValueString));
}

这比我之前尝试做的要简单得多，因为我不需要适配器或新类，所以我绝对不需要更改速度 View 动画，它的工作原理就像我需要的一样!