Android Simple 2 line ListView example

Question

我正在为Android（C＃）使用Mono，并且我正在尝试获取ListView，以连续显示2行。有一些教程，但其中一些在MFA中不起作用，而工作的工作很复杂。在ListView中显示2行的最简单方法是什么？

Answer 1

我假设如果您在列表项目中所需的1行超过1行，那么您当然必须使用CustomAdapter类，因此我将在下面发布一个自定义适配器类，该类将显示同一字符串在两行的两行上，您都根据要求将其mod！

public class CustomAdapter extends ArrayAdapter<String>{
private Activity activity;
public CustomAdapter(Context context, int textViewResourceId, List<String> objects) {
    super(context, textViewResourceId, objects);
    this.activity = (Activity)context;
}
public View getView(int position, View convertView, ViewGroup parent) {
    //View customView = convertView;
    String stringValue = getItem(position);
    // you can use this method as well instead of what i have used in this example, inflate your customView referring to a preformed xml file. extract the fields required from this view and set their values 
    //if (customView == null) {
    //  final LayoutInflater vi = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
    //  customView = vi.inflate(R.layout.your_custom_list_row, null);
    //}
    //extract fields from your_custom_list_row and set their values

LinearLayout customView = new LinearLayout(activity);
TextView t1 = new TextView(activity);
t1.setText(stringValue);
TextView t2= new TextView(activity);
t2.setText(stringValue);
customView.addView(t1);
customView.addView(t2);
return customView;
}

}

这将在您的主要活动中进行

List<String> stringsList = new ArrayList<String>();
//populate arraylist
CustomAdapter custAdpt = new CustomAdapter(this, R.layout.your_custom_list_row, stringsList);
listView.setAdapter(custAdpt);

Answer 2

在您的getView（）方法中尝试此操作。

ViewHolder holder;
         if (convertView   == null) 
            {
                //this should only ever run if you do not get a view back            
             LayoutInflater  inflater = (LayoutInflater) contxt
                    .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
             convertView  = inflater.inflate(R.layout.homelistrow, null); 
             holder = new ViewHolder();
             holder.text = (Textview) convertView
                        .findViewById(R.id.icon);

             holder.text1 = (TextView) convertView
                        .findViewById(R.id.name_label);
             convertView.setTag(holder);

            }
         else {
                         holder = (ViewHolder) convertView.getTag();
                     }
         holder.text.setText(Your 1st row value);
         holder.text2.setText(Your 2nd row value);

Answer 3

也许您想要的是多个项目类型，可以在单个ListView中显示不同的项目。因此，您可以使用这样的自定义适配器：

package com.example.myapplication.customarray;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;
import com.example.myapplication.R;
import java.util.List;
/**
 * Created by SONY on 14/10/2016.
 */
public class CustomAdapter extends ArrayAdapter<BaseItem> {
    private List<BaseItem> data;
    public CustomAdapter(Context context, List<BaseItem> data) {
        super(context, 0, data);
        this.data = data;
    }
    @Override
    public View getView(int position, View convertView, ViewGroup parent){
        BaseItem baseItem = data.get(position);
        if(convertView == null) {
            if(baseItem.type == 0) {
                convertView = LayoutInflater.from(getContext()).inflate(R.layout.item_student, parent, false);
                convertView.setTag(ViewHolder.createHolder(convertView));
            }
            else {
                convertView = LayoutInflater.from(getContext()).inflate(R.layout.item_header, parent, false);
                convertView.setTag(ViewHolderHeader.createViewHolder(convertView));
            }
        }
        if(baseItem.type == 0) {
            ViewHolder holder = (ViewHolder) convertView.getTag();
            StudentItem student = (StudentItem) data.get(position);
            holder.textName.setText(student.name);
            holder.textID.setText(student.id);
            holder.imgStudent.setImageResource(student.picture);
        }
        else {
            ViewHolderHeader holderHeader = (ViewHolderHeader) convertView.getTag();
            HeaderItem headerItem = (HeaderItem) data.get(position);
            holderHeader.textLabel.setText(headerItem.label);
        }
       return convertView;
    }
    @Override
    public int getCount( ) {
        return data.size();
    }
    @Override
    public int getViewTypeCount() {
        return 2;
    }
    @Override
    public int getItemViewType(int position) {
        BaseItem item = data.get(position);
        return item.type;
    }

    public static class ViewHolder  {
        public TextView textName;
        public TextView textID;
        public ImageView imgStudent;
        public static final ViewHolder createHolder(View view) {
            ViewHolder holder = new ViewHolder();
            holder.textName = (TextView) view.findViewById(R.id.textName);
            holder.textID = (TextView) view.findViewById(R.id.textID);
            holder.imgStudent = (ImageView) view.findViewById(R.id.imgStudent);
            return holder;
        }
    }
    public static class ViewHolderHeader {
        public TextView textLabel;
        public static final ViewHolderHeader createViewHolder(View view) {
            ViewHolderHeader holderHeader = new ViewHolderHeader();
            holderHeader.textLabel = (TextView)view.findViewById(R.id.textHeader);
            return holderHeader;
        }
    }
}

您可以在这里阅读