Question

我试图找出如何将动态ListView实现为片段，但无法弄明白。该项目使用自定义ArrayAdapter。

我想我会链接教程页面而不是仅仅粘贴一切。我将如何在片段页面中进行此工作？

FeaturedDealsFragment.java（片段类）

public class FeaturedDealsFragment extends Fragment {

@Override  
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {  

    View V = inflater.inflate(R.layout.fragment_featured_deals, container, false);

    ListView LV = (ListView) this.getActivity().findViewById(R.id.listView1);

    Deal deal_data[] = new Deal[]
            {
                new Deal("Deal 1", R.drawable.scenery, "500/100 Supporters", "$500"),
                new Deal("Deal 2", R.drawable.scenery, "500/100 Supporters", "$500"),
                new Deal("Deal 3", R.drawable.scenery, "500/100 Supporters", "$500"),
                new Deal("Deal 4", R.drawable.scenery, "500/100 Supporters", "$500"),
                new Deal("Deal 5", R.drawable.scenery, "500/100 Supporters", "$500")
            };

    DealAdapter adapter = new DealAdapter(getActivity(), R.layout.listview_item_row, deal_data);

    View header = (View)inflater.inflate(R.layout.listview_header_row, null);
    LV.addHeaderView(header);
    LV.setAdapter(adapter);

    return V;

}

}

DealAdapter.java

public class DealAdapter extends ArrayAdapter<Deal>{

Context context; 
int layoutResourceId;    
Deal data[] = null;

public DealAdapter(Context context, int layoutResourceId, Deal[] data) {
    super(context, layoutResourceId, data);
    this.layoutResourceId = layoutResourceId;
    this.context = context;
    this.data = data;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
    View row = convertView;
    DealHolder holder = null;

    if(row == null)
    {
        LayoutInflater inflater = ((Activity)context).getLayoutInflater();
        row = inflater.inflate(layoutResourceId, parent, false);

        holder = new DealHolder();
        holder.txtDeal = (TextView)row.findViewById(R.id.txtDeal);
        holder.imgDealImage = (ImageView)row.findViewById(R.id.imgDealImage);
        holder.txtSupporters = (TextView)row.findViewById(R.id.txtSupporters);
        holder.txtPrice = (TextView)row.findViewById(R.id.txtPrice);

        row.setTag(holder);
    }
    else
    {
        holder = (DealHolder)row.getTag();
    }

    Deal deal = data[position];
    holder.txtDeal.setText(deal.deal);
    holder.imgDealImage.setImageResource(deal.image);
    holder.txtSupporters.setText(deal.supporters);
    holder.txtPrice.setText(deal.price);

    return row;
}

static class DealHolder
{
    TextView txtDeal;
    ImageView imgDealImage;
    TextView txtSupporters;
    TextView txtPrice;
}
}

Deal.java

public class Deal {
public String deal;
public int image;
public String supporters;
public String price;

public Deal() {
    super();
}

public Deal(String deal, int image, String supporters, String price) {
    super();
    this.deal = deal;
    this.image = image;
    this.supporters = supporters;
    this.price = price;
}
}

Answer 1

只需使用传递给onCreateView方法的LayoutInflater，而不是调用getLayoutInflater（）这是Activity类中的方法：

View header = (View) inflater.inflate(R.layout.listview_header_row, null);

Fragment不是Context的子类。获取对Context对象的引用的最简单方法通常是获取对Context的子类的Activity的引用。因此，您需要将WeatherAdapter更改为：

WeatherAdapter adapter = new WeatherAdapter(getActivity(), R.layout.listview_item_row, weather_data);

Answer 2

我想你想要一个包含一个包含ListView的片段的Activity。

正确的方法是创建一个Fragment并在其布局中添加一个ListView。在其onCreateView方法中获取ListView引用并设置适配器。

在活动中，您可以通过XML布局或以编程方式在onCreate方法中添加Fragment。

我不知道这是不是你想要的。

将动态ListView添加到片段（特定项目）

2 个答案: