以前，我可以轻松地将布局扩展为 ListView 的自定义 View 层次结构。但我不知道如何为 listFragment 做同样的事情。可以说我有一个 item_list 布局，里面有一个 ImageView 和 2 个 TextView 。我想膨胀它以在我的 ListFragment 中使用。但是怎么办呢？？

public class Tab1Fragment extends ListFragment {
private LayoutInflater mInflater;
private Vector<RowData> data;
RowData rd;

 static final String[] title = new String[] {
    "Classic Plank", "Side Plank", "Reversed Plank", "Swissball Plank", "One Arm One Leg", //5
    };

static final String[] description = new String[] {
    "Variation of Sushis from fresh vegetables and seafoods! Good for family occassions!",
    "Oyakodon is a Japanese Rice Bowl dish with Chicken, Eggs and various sorts of healthy and delicious Veggetables!",
    "Japanese assorted Pancake that is made from many different ingredients. The taste is so delicious!",
    "Japanese Dumplings made of Rice Flour. This is one of the healthiest sweets in Japan!",
    "Japanese assorted stews. Made from many different kind of veggetables. Popular in Winter!", //5
    };

private Integer[] imgid = {
 R.drawable.thumb_classic, R.drawable.thumb_side, R.drawable.thumb_reverse,      R.drawable.thumb_swissball, R.drawable.thumb_reachout, //5
};

 @Override
 public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.easylist);
mInflater = (LayoutInflater) getSystemService(Activity.LAYOUT_INFLATER_SERVICE);
data = new Vector<RowData>();
for(int i=0;i<title.length;i++){
    try {
        rd = new RowData(i,title[i],description[i]);
        } catch (ParseException e) {
            e.printStackTrace();
            }
    data.add(rd);
    }
CustomAdapter adapter = new CustomAdapter(this, R.layout.list_item_main, android.R.id.list, data);
   setListAdapter(adapter);
   getListView().setTextFilterEnabled(true);
}


private void setContentView(int main) {
// TODO Auto-generated method stub

}


private LayoutInflater getSystemService(String layoutInflaterService) {
// TODO Auto-generated method stub
return null;
}


public void onListItemClick(ListView listView, View view, int position, long id) {
Bundle bundle = new Bundle();
bundle.putInt("Layout", position);

Intent newIntent = new Intent(this.getApplicationContext(), ContentViewer.class);
newIntent.putExtras(bundle);
startActivityForResult(newIntent, 0);
}
   private Context getApplicationContext() {
// TODO Auto-generated method stub
return null;
}
private class RowData {
   protected int mId;
   protected String mTitle;
   protected String mDescription;
   RowData(int id, String title, String description){
   mId=id;
   mTitle = title;
   mDescription = description;
}
   @Override
   public String toString() {
           return mId+" "+mTitle+" "+mDescription;
   }
}
  private class CustomAdapter extends ArrayAdapter<RowData> {

  public CustomAdapter(Context context, int resource, int textViewResourceId, List<RowData> objects) {               

 super(context, resource, textViewResourceId, objects);
}
@Override
   public View getView(int position, View convertView, ViewGroup parent) {   

   ViewHolder holder = null;
   TextView title = null;
   TextView description = null;
   ImageView thumbnail = null;
   RowData rowData = getItem(position);
   if(null == convertView){
        convertView = mInflater.inflate(R.layout.list_item_main, null);
        holder = new ViewHolder(convertView);
        convertView.setTag(holder);
 }
         holder = (ViewHolder) convertView.getTag();
         title = holder.gettitle();
         title.setText(rowData.mTitle);

         description = holder.getdescription();
         description.setText(rowData.mDescription);

         thumbnail = holder.getImage();
         thumbnail.setImageResource(imgid[rowData.mId]);
         return convertView;
}
        private class ViewHolder {
        private View mRow;
        private TextView title = null;
        private TextView description = null;
        private ImageView thumbnail = null; 

        public ViewHolder(View row) {
        mRow = row;
 }
    public TextView gettitle() {
         if(null == title){
             title = (TextView) mRow.findViewById(R.id.title);
            }
        return title;
     }     

     public TextView getdescription() {
         if(null == description){
              description = (TextView) mRow.findViewById(R.id.description);
                }
       return description;
     }

    public ImageView getImage() {
         if(null == thumbnail){
              thumbnail = (ImageView) mRow.findViewById(R.id.thumbnail);
                                  }
            return thumbnail;
    }
 }            
}
}

最佳答案

我不记得当我遇到这个问题时这是否解决了这个问题，但我认为你没有正确地遵循 fragment 生命周期(参见 here)。

在讨论 Activity 的上下文中，您必须先创建您的 ListView，然后再调用 setAdapter()。您在 onCreate() 中实现，它在 onCreateView() 之前调用。

所以看起来您实际上是在尝试在创建 ListView 之前设置适配器。

作为一种习惯，最好在 fragment 生命周期的 onCreateView() 部分中使用 View 完成所有工作。

关于android - 使用自定义 View 填充 ListFragments？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/9053671/