自定义ListView部分标题

Question

我有一个带有自定义数组适配器的列表视图。我想添加截面标题以按日期列出视图项目，这是对象中的一个值。我的适配器课是

public class ReceiptAdapter2 extends BaseAdapter {
Context context;
LayoutInflater inflater;
private ArrayList<ReceiptModel> planList;
public ReceiptAdapter2(Context applicationContext, ArrayList<ReceiptModel> planList) {
    this.context = applicationContext;
    this.planList = planList;
    inflater = (LayoutInflater.from(applicationContext));
}

@Override
public int getViewTypeCount() {
    return 2;
}
@Override
public int getItemViewType(int position) {
    if (getItem(position) instanceof SectionItem){
        return 0;
    }else{
        return 1;
    }
}
@Override
public int getCount() {
    return planList.size();
}
@Override
public Object getItem(int i) {
    return  planList.get(i);
}
@Override
public long getItemId(int i) {
    return 0;
}
@Override
public View getView(int i, View view, ViewGroup viewGroup) {
    ReceiptModel model = planList.get(i);
    view = inflater.inflate(R.layout.snipadapt, null);
    TextView names = (TextView) view.findViewById(R.id.textView);
    names.setText(model.getName());
    return view;
}
}

MainActivity代码

 if (hstry.length() > 0 && hstry != null) {
            for (int i = 0; i < hstry.length(); i++) {
                try {
                    history_data = hstry.getJSONObject(i);
                    model = new ReceiptModel();
                    model_section = new SectionItem();
                    model.setRid(history_data.optString("ID"));
                    model.setName(history_data.optString("Name"));
                    model.setMobile(history_data.optString("Mobile"));
                    model.setTax(history_data.optString("Tax"));
                    model.setQnt(history_data.optString("T_quantity"));
                    model.setPrice(history_data.optString("T_price"));
                    model.setSub(history_data.optString("Sub_total"));
                    model.setDiscount(history_data.optString("Discount"));
                    model.setType(history_data.optString("Payment_type"));
                    model.setDate(db.getCatColor(history_data.optString("Date")));
                    model_section.setDevice(db.getCatColor(history_data.optString("Date")));

                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
            setAdapter();
        }

设置适配器

 private void setAdapter() {
    adapter = new ReceiptAdapter2(context,planList);
    category_list.setAdapter(adapter);
}

模型类

public class ReceiptModel {
private String id,name,mobile,tax,t_quantity,t_price,s_total,discount,date,type;
private String device;
private String os,location;
private String network,weather,storage,time,internal,cat_id;
public String getRid() {
    return id;
}
public void setRid(String id) {
    this.id = id;
}

public String getName() {
    return name;
}
public void setName(String name) {
    this.name = name;
}

public String getMobile() {return mobile; }
public void setMobile(String mobile) {this.mobile = mobile; }
public String getTax() {return tax; }
public void setTax(String tax) {this.tax = tax; }
public String getQnt() {return t_quantity; }
public void setQnt(String t_quantity) {this.t_quantity = t_quantity; }
public String getPrice() {return t_price; }
public void setPrice(String t_price) {this.t_price = t_price; }
public String getSub() {return s_total; }
public void setSub(String s_total) {this.s_total = s_total; }
public String getDiscount() {return discount; }
public void setDiscount(String discount) {this.discount = discount; }
public String getDate() {return date; }
public void setDate(String date) {this.date = date; }

}

我转介了许多教程，但对我没有任何作用。我可以将多个ArrayList像我的情况下传递给适配器类吗？您的回答被赞赏

Answer 1

您需要将两个模型receiptModel((和selectionitem((添加为像这样的ArrayList的对象

private ArrayList<Object> lpAndAlp=new ArrayList<>();
 lpAndAlp.add("model");
 lpAndAlp.add("model_section");

，然后在适配器中的lpAndAlp

 private void setAdapter() {
    adapter = new ReceiptAdapter2(context,planList);
    category_list.setAdapter(adapter);
}

并将其称为您的适配器类。

private ArrayList<Object> planList;
    public ReceiptAdapter2(Context applicationContext, ArrayList<Object> planList) {
        this.context = applicationContext;
        this.planList = planList;
        inflater = (LayoutInflater.from(applicationContext));
    }

您只需检查getView中的getItemViewType方法的返回类型

 @Override
        public View getView ( int i, View view, ViewGroup viewGroup){ 
            int type = getItemViewType(position);
            if (view == null) {
                switch (type) {
                    case 0:
                        view = inflater.inflate(R.layout.snipadapt, parent, false);
                        break;
                    case 1:
                        view = inflater.inflate(R.layout.yourHeaderLayout, parent, false);
                        break;
                }
            }
            switch (type) {
                case 0:
                    ReceiptModel model = planList.get(i);
                    view = inflater.inflate(R.layout.snipadapt, null);
                    TextView names = (TextView) view.findViewById(R.id.textView);
                    names.setText(model.getName());
                    break;
                case 1:
                    SectionItem model_section = planList.get(i);
                    //your header
                    break;
            }

            return view;
        }

Answer 2

在receipAdapter2

中

@Override
  public int getItemViewType(int position) {
     //CHECK IF CURRENT ITEM IS List THEN RETURN ROW
    if(getItem(position) instanceof LISTSECTION)
    {
      return ROW;
    }
     //OTHERWISE RETURN HEADER
    return HEADER;
  }

在GetView方法中：--->

 @Override
  public View getView(int pos, View convertView, ViewGroup parent) {
    // TODO Auto-generated method stub
      //TYPE OF VIEW
    int type=getItemViewType(pos);
    //IF THERE IS NO VIEW CREATE IT
    if(convertView==null)
    {
      inflater=(LayoutInflater) c.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
      switch (type) {
      case ROW:
        convertView=inflater.inflate(R.layout.rowmodel, null);
        break;
       case HEADER:
              convertView=inflater.inflate(R.layout.headermodel,null);
      default:
        break;
      }
    }
     //OTHERWISE CHECK IF ITS ROW OR HEADER AND SET DATA ACCORDINGLY
    switch (type) {
    case ROW:
     // Row data

      break;
    case HEADER:
      //header data
    default:
      break;
    }
    return convertView;
  }