自定义列表视图部分标题

Question

我有一个使用自定义数组适配器填充的列表视图。我想添加部分标题以按日期列出视图项目，这是对象中的一个值。 我的适配器类是

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; }

}

我参考了许多教程，但对我没有用。我如何将多个数组列表传递给适配器类？感谢您的回复

Answer 1

您需要将您的两个模型 ReceiptModel() 和 SelectionItem() 添加为这样的 ArrayList 的对象

private ArrayList<Object> lpAndAlp=new ArrayList<>();

 lpAndAlp.add("model");
 lpAndAlp.add("model_section");

然后在你的适配器中lpAndAlp

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

并像这样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 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 ReceiptAdapter2 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;
  }