希望有人可以提供帮助。我遇到了一个问题似乎在夸大我的看法。我的目标是使用自定义数组适配器在自定义布局中显示项目列表。我使用另一个SO帖子重新编写了一些原始代码，但是我的简单适配器工作正常，新列表不会显示。请参阅以下内容：
这是我的Fragment类。
HomeFeedFragment.java
public class HomeFeedFragment extends ListFragment {
private ListView listView;
private ArrayList<MainEvent> items;
private MainEventListViewAdapter adapter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.fragment_homefeed,
container, false);
listView = (ListView) rootView.findViewById(android.R.id.list);
return rootView;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
//GetEvents is just a test method to return a list of pre-filled event objects
items = GlobalList.GetEvents();
adapter = new MainEventListViewAdapter(getActivity(), android.R.id.list, items);
listView.setAdapter(adapter);
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
// do something with the data
}
}
我的自定义行布局xml：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:padding="5dip" >
<!-- ListRow Left sied Thumbnail image -->
<LinearLayout
android:id="@+id/thumbnail"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_marginRight="5dip"
android:padding="3dip" >
<ImageView
android:id="@+id/list_image"
android:layout_width="50dip"
android:layout_height="50dip" />
</LinearLayout>
<!-- Heading Text -->
<TextView
android:id="@+id/eventheader"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignTop="@+id/thumbnail"
android:layout_toRightOf="@+id/thumbnail"
android:textColor="#040404"
android:textSize="15sp"
android:textStyle="bold"
android:typeface="sans" />
<!-- Event Description -->
<TextView
android:id="@+id/eventdescription"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignBottom="@+id/thumbnail"
android:layout_below="@id/eventheader"
android:layout_marginTop="1dip"
android:layout_toRightOf="@+id/thumbnail"
android:textColor="#343434"
android:textSize="10sp"
tools:ignore="SmallSp" />
<!-- Posted Time -->
<TextView
android:id="@+id/eventpostedtime"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentRight="true"
android:layout_alignTop="@id/eventheader"
android:layout_marginRight="5dip"
android:gravity="right"
android:textColor="#10bcc9"
android:textSize="10sp"
android:textStyle="bold"
tools:ignore="SmallSp" />
</RelativeLayout>
实际的片段布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<ListView
android:id="@android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content" >
</ListView>
</LinearLayout>
我的自定义ArrayAdapter：
public class MainEventListViewAdapter extends ArrayAdapter<MainEvent> {
private Context context;
private List<MainEvent> eventList;
public MainEventListViewAdapter(Context context, int textViewResourceId, List<MainEvent> eventList){
super(context, textViewResourceId, eventList);
this.context = context;
//this.eventList = eventList;
}
/*private view holder class*/
private class ViewHolder {
ImageView imageView;
TextView txtEventHeader;
TextView txtEventDescription;
TextView txtEventPostedTime;
}
public int getCount(){
if(eventList!=null){
return eventList.size();
}
return 0;
}
public MainEvent getItem(int position){
if(eventList!=null){
return eventList.get(position);
}
return null;
}
public long getItemId(int position){
if(eventList!=null){
return eventList.get(position).hashCode();
}
return 0;
}
public View getView(int position, View convertView, ViewGroup parent){
ViewHolder holder = null;
MainEvent rowItem = getItem(position);
LayoutInflater inflater = (LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if(convertView==null){
convertView = inflater.inflate(R.layout.fragment_homefeed_rowlayout, parent, false);
holder = new ViewHolder();
holder.txtEventHeader = (TextView) convertView.findViewById(R.id.eventheader);
holder.txtEventDescription = (TextView) convertView.findViewById(R.id.eventdescription);
holder.txtEventPostedTime = (TextView) convertView.findViewById(R.id.eventpostedtime);
convertView.setTag(holder);
}else{
holder = (ViewHolder) convertView.getTag();
}
holder.txtEventHeader.setText(rowItem.getHeadline());
holder.txtEventDescription.setText(rowItem.getDescription());
holder.txtEventPostedTime.setText(rowItem.getPostedTime());
/*TextView text = (TextView) v.findViewById(R.id.label);
text.setText(m.getHeadline());
ImageView imageView = (ImageView) v.findViewById(R.id.icon);
imageView.setTag(m.getImageURL());
//DownloadImageTask dt = new DownloadImageTask();
dt.execute(imageView);
return v;*/
return convertView;
}
public List<MainEvent> getEventList(){
return eventList;
}
public void setEventList(List<MainEvent> eventList){
this.eventList = eventList;
}
}
^我最初在这个类中有一个异步任务来检索每个项目的图像，但我现在已经删除了所有这些。
我没有在LogCat中发现任何实际错误，没有崩溃或任何事情，View只是没有膨胀。任何帮助表示赞赏。
答案 0 :(得分：0)
这很令人尴尬。我发现了这个问题。显然，我忘记取消注释初始化事件列表的适配器构造函数中的行：
//this.eventList = eventList;
我暂时评论它以修复另一个错误。现在工作正常，但感谢你的建议。