android - 将单选按钮添加到 ListView

Question

我想在我现有的 ListView 中添加一个单选按钮，以便一次只需要选择一个单选按钮。

元素详情:

public class ItemDetails {

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public String getItemDescription() {
        return itemDescription;
    }
    public void setItemDescription(String itemDescription) {
        this.itemDescription = itemDescription;
    }
    public String getPrice() {
        return price;
    }
    public void setPrice(String price) {
        this.price = price;
    }
    public int getImageNumber() {
        return imageNumber;
    }
    public void setImageNumber(int imageNumber) {
        this.imageNumber = imageNumber;
    }


    private String name ;
    private String itemDescription;
    private String price;
    private int imageNumber;

}

适配器:

    public class ItemListBaseAdapter extends BaseAdapter {
    private static ArrayList<ItemDetails> itemDetailsrrayList;

    private Integer[] imgid = {
            R.drawable.img1,
            R.drawable.img2,
            R.drawable.img3,
            R.drawable.img4,
            R.drawable.img5,
            R.drawable.img6
            };

    private LayoutInflater l_Inflater;
    public ItemListBaseAdapter(Context context, ArrayList<ItemDetails> results) {
        itemDetailsrrayList = results;
        l_Inflater = LayoutInflater.from(context);
    }

    public int getCount() {
        return itemDetailsrrayList.size();
    }

    public Object getItem(int position) {
        return itemDetailsrrayList.get(position);
    }

    public long getItemId(int position) {
        return position;
    }

    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder holder;
        if (convertView == null) {

            convertView = l_Inflater.inflate(R.layout.item_details_view, null);
            holder = new ViewHolder();
            holder.txt_itemName = (TextView) convertView.findViewById(R.id.name);
            holder.txt_itemDescription = (TextView) convertView.findViewById(R.id.itemDescription);
            holder.txt_itemPrice = (TextView) convertView.findViewById(R.id.price);
            holder.itemImage = (ImageView) convertView.findViewById(R.id.photo);
            convertView.setTag(holder);
        } else {
            holder = (ViewHolder) convertView.getTag();
        }




        holder.txt_itemName.setText(itemDetailsrrayList.get(position).getName());
        holder.txt_itemDescription.setText(itemDetailsrrayList.get(position).getItemDescription());
        holder.txt_itemPrice.setText(itemDetailsrrayList.get(position).getPrice());
        holder.itemImage.setImageResource(imgid[itemDetailsrrayList.get(position).getImageNumber() - 1]);
//      imageLoader.DisplayImage("http://192.168.1.28:8082/ANDROID/images/BEVE.jpeg", holder.itemImage);

        View row = convertView;

        CheckedTextView checkBox = (CheckedTextView) row.findViewById(R.id.checkstate);
        checkBox.setChecked(false);
        return convertView;
    }



    static class ViewHolder {
        TextView txt_itemName;
        TextView txt_itemDescription;
        TextView txt_itemPrice;
        ImageView itemImage;
        CheckedTextView checkBox;
    }
}

项目详细信息.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content">

    <LinearLayout
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:orientation="vertical">
    <ImageView 
        android:id="@+id/photo"
        android:layout_width="150dip"
        android:layout_height="100dip"
        android:paddingRight="15dp"
        android:paddingLeft="15dp"/>
    </LinearLayout>
    <RelativeLayout
        android:layout_width="fill_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:layout_marginLeft="160dp"
            android:layout_marginTop="10dp">
    <TextView android:id="@+id/name"
        android:textSize="14sp" 
        android:textStyle="bold" 
        android:textColor="#000000" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"/>
    <TextView android:id="@+id/itemDescription"
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"
        android:layout_below="@id/name"/>
    <TextView android:id="@+id/price" 
        android:textSize="19sp" 
        android:textStyle="bold" 
        android:textColor="#003399" 
        android:layout_width="wrap_content" 
        android:layout_height="wrap_content"
        android:layout_below="@id/itemDescription"/>
    </RelativeLayout>
</RelativeLayout>

ListView :

<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="fill_parent"
        android:layout_height="match_parent"
        android:orientation="vertical"
        android:background ="#CCCCCC">

    <ListView
        android:id="@+id/list"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_weight="1"
        android:divider="#3366CC"
        android:dividerHeight="2dp" 
        android:choiceMode="singleChoice"/>       
</LinearLayout>

我见过很多 SO anwsers，但在我的案例中没有一个能正常工作，说要添加

listView.setChoiceMode(ListView.CHOICE_MODE_SINGLE);

谁能告诉我如何实现这一点？

Answer 1

对于复杂的 ListView 项目，你应该自己做。只需在 ItemDetails 中添加 boolean isSelected，然后在 getView() 中添加 checkBox.setChecked(item.isSelected); > 在 ItemListBaseAdapter 中。现在，当在 ListView 中单击一个项目时，只需更改 itemDetailsrrayList 中的数据并调用 notifyDataSetChanged()。