【发布时间】：2020-03-22 23:46:48
【问题描述】：
所以我有一个片段，其中包含三个速度视图仪表。 Picture of fragment 他们曾经直接在片段中并且可以正常工作，但是在我需要添加文本视图之后，我无法让所有内容都适合屏幕所以我决定创建一个自定义布局并使用列表视图显示它们。
过去更新车速表非常容易，而且一切正常。
将所有内容添加到列表视图后，我认为要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 并从那里。我曾尝试使用支架来解决问题，但没有运气。
这是关于我如何创建适配器的片段代码
@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);
}
这里是更新函数之一，它们基本上都是相同的代码，但名称不同。当我收到有关更改特定标记的消息时，我会在主要活动中调用它们。
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 到所需数字）在速度视图中发生，或者如何更新列表视图以使动画不会发生。
或者最好完全省略列表视图，同时仍然获得所需的布局（永远只有 3 个段）。
【问题讨论】：
标签： java android android-listview