Android 我的listView崩溃了。异常分派输入事件
我有一个列表视图(图像+文本),我从互联网加载数据。 我扩展了我的ListView批处理。如果在没有加载图像的情况下关闭internet并触摸视图(从ListView),则会出现错误 这是我的适配器代码:Android 我的listView崩溃了。异常分派输入事件,android,listview,android-volley,Android,Listview,Android Volley,我有一个列表视图(图像+文本),我从互联网加载数据。 我扩展了我的ListView批处理。如果在没有加载图像的情况下关闭internet并触摸视图(从ListView),则会出现错误 这是我的适配器代码: public class AdapterListGroups extends BaseAdapter { private List<ItemMusicGroup> listItemsMusicGroup; private LayoutInflater layout
public class AdapterListGroups extends BaseAdapter {
private List<ItemMusicGroup> listItemsMusicGroup;
private LayoutInflater layoutInflater;
private LoaderData loaderData;
final private int heightForLoad;
public AdapterListGroups(Context context, List<ItemMusicGroup> listItemsMusicGroup, LoaderData loaderData) {
this.listItemsMusicGroup = listItemsMusicGroup;
this.layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
this.loaderData = loaderData;
this.heightForLoad = context.getResources().getInteger(R.integer.sizeOfListView) / 2;//Параметр который определяет когда нужно подгружать данные в список
}
@Override
public int getCount() {
if ( this.listItemsMusicGroup.isEmpty() ) loaderData.extentionListItemsMusicGroup(listItemsMusicGroup, 0);//Если список пустой, подгружаем первые данне
return this.listItemsMusicGroup.size();
}
@Override
public Object getItem(int position) {
Log.d("INFO", "getItem" + position);
//При прокрутке смотрим нужно ли увечичвать список
if (checkNeedExtention(position))
loaderData.extentionListItemsMusicGroup(listItemsMusicGroup, position);
return this.listItemsMusicGroup.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if ( view == null ) {
view = layoutInflater.inflate(R.layout.list_item, parent, false);
}
ItemMusicGroup currentItemMusicGroup = getItemMusicGroup(position);
setTextContentItem(view, currentItemMusicGroup);
setImageContentItem(view, currentItemMusicGroup);
return view;
}
//Заполняем миниатюры для картинок
private void setImageContentItem(View view, ItemMusicGroup currentItemMusicGroup)
{
if ( currentItemMusicGroup.getLinkSmallImage() != null) {
NetworkImageView networkImageView = (NetworkImageView) view.findViewById(R.id.item_networkImageView_icon);
networkImageView.setImageUrl(currentItemMusicGroup.getLinkSmallImage(), loaderData.getImageLoader());
}
}
//Заполняем данные в TextView
private void setTextContentItem(View view, ItemMusicGroup currentItemMusicGroup)
{
try {
setTextForTextView(view, R.id.item_textView_nameGroup, currentItemMusicGroup.getName());
setTextForTextView(view, R.id.list_item_textView_countAlbum, currentItemMusicGroup.getAlbumsString());
setTextForTextView(view, R.id.list_item_textView_countSing, currentItemMusicGroup.getTracksString());
setTextForTextView(view, R.id.list_item_TextView_genres, currentItemMusicGroup.getGenresString());
} catch (Exception e) {
Log.d(getStringResource(R.string.log_tag_error, view), this.getClass().getSimpleName() + view.toString());
}
}
private void setTextForTextView( View view, int resIdView, String textContent) {
TextView nameGroup = (TextView) view.findViewById(resIdView);
if ( textContent == null) {
textContent = getStringResource(R.string.defaultValueParametr, view);
}
nameGroup.setText(textContent);
}
private String getStringResource(int resourseId, View view)
{
return view.getContext().getResources().getString(resourseId);
}
public ItemMusicGroup getItemMusicGroup(int position) {
return (ItemMusicGroup) getItem(position);
}
private boolean checkNeedExtention(int position)
{
if (position >= listItemsMusicGroup.size() - heightForLoad && position < loaderData.getSizeJSONArray())
{
return true;
} else return false;
}
}
我找到了我问题的答案。 也许它对任何人都有用。 当我扩展我的
listItemsMusicGroup
时,我必须调用notifyDataSetChanged()
以更新ListView
public Object getItem(int position) {
//When scrolling, let's see if it is necessary to improve the list
if (checkNeedExtention(position)) {
loaderData.extentionListItemsMusicGroup(listItemsMusicGroup, position);
notifyDataSetChanged();
}
return this.listItemsMusicGroup.get(position);
}
请发布使用此listview apdater的活动代码
public Object getItem(int position) {
//When scrolling, let's see if it is necessary to improve the list
if (checkNeedExtention(position)) {
loaderData.extentionListItemsMusicGroup(listItemsMusicGroup, position);
notifyDataSetChanged();
}
return this.listItemsMusicGroup.get(position);
}