我在ListView中的项目中单击图像时遇到问题。当我点击我想要显示已经消失的布局。这是我的代码：
public class MyActualOffers extends BaseActivity {
private IResponse iResponse = null;
private ListView actualOffersList;
private ActualOffersListAdapter actualOffersAdapter;
private ArrayList<Offers> actualOffersFromJson;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_my_actual_offers);
actualOffersFromJson = new ArrayList<Offers>();
actualOffersList = (ListView) findViewById(R.id.actualOffersList);
iResponse = new IResponse() {
@Override
public void onResponse(JSONObject jObject) {
// messageUser = new User();
// messageUser.parseJsonResponse(jObject);
// usersMessages.add(messageUser);
// new DownloadImageTask(profileP)
// .execute("http://"+messageUser.getAvatarURL());
//
// messagesListView.refreshDrawableState();
// adapter.notifyDataSetChanged();
// adapter.notifyDataSetInvalidated();
}
@Override
public void onResponse(JSONArray jArray) {
try {
for (int i = 0; i < 3; i++) {
JSONObject messageJSON = (JSONObject)jArray.get(i);
Offers offer = new Offers();
offer.parseJsonResponse(messageJSON);
actualOffersFromJson.add(offer);
}
}catch (JSONException e) {
e.printStackTrace();
}
actualOffersAdapter = new ActualOffersListAdapter(getApplicationContext(), actualOffersFromJson);
actualOffersList.setAdapter(actualOffersAdapter);
// adapter = new MessagesListAdapter(getApplicationContext(), myMessagesList, usersMessages);
// messagesListView.setAdapter(adapter);
}
@Override
public void onError(JSONObject jObject) {
ErrorObject error = new ErrorObject();
error.parseJsonResponse(jObject);
error.showErrorDialog(MyActualOffers.this);
}
};
getActualMyOffers();
}
private void getActualMyOffers(){
SharedPreferencesData sharedData = new SharedPreferencesData();
String url = ConnectionParams.URL_OFFERS_FETCH_CURRENT_USER_OFFERS.replace("{0}", ""+"get");
String token = "?auth_token="+sharedData.getTokenData(getBaseContext());
connection.get(url + token + "&state=active", iResponse);
}
private class ActualOffersListAdapter extends BaseAdapter {
private Context context;
private ArrayList<Offers> offersList;
private LayoutInflater inflater;
private ViewHolder holder;
boolean isExpand = false;
public ActualOffersListAdapter(Context context, ArrayList<Offers> offersList) {
this.context = context;
this.offersList = offersList;
inflater = (LayoutInflater) getApplicationContext()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
}
@Override
public int getCount() {
return offersList.size();
}
@Override
public Object getItem(int position) {
return offersList.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(final int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = inflater.inflate(
R.layout.actual_offers_list_item, null);
holder = new ViewHolder();
holder.cities = (TextViewWithImage) convertView.findViewById(R.id.actualOffersFromCityTXT);
holder.date = (TextView) convertView.findViewById(R.id.actualOffersCalendarTXT);
holder.type = (TextView) convertView.findViewById(R.id.actualOffersTripTypeTXT);
holder.shipment = (TextView) convertView.findViewById(R.id.actualOffersShipmentTypeTXT);
holder.transport = (TextView) convertView.findViewById(R.id.actualOffersTransportTypeTXT);
holder.deleteOffer = (TextView) convertView.findViewById(R.id.actualOffersDeleteTXT);
holder.editOffer = (TextView) convertView.findViewById(R.id.actualOffersEditOfferTXT);
holder.addSimilar = (TextView) convertView.findViewById(R.id.actualOffersAddSimilarTXT);
holder.addOpposite = (TextView) convertView.findViewById(R.id.actualOffersAddOppositeTXT);
holder.infoIcon = (ImageView) convertView.findViewById(R.id.actualOffersInfoICON);
holder.shipmentIcon = (ImageView) convertView.findViewById(R.id.actualOffersShipmentTypeICON);
holder.transportIcon = (ImageView) convertView.findViewById(R.id.actualOffersTransportTypeICON);
holder.typeIcon = (ImageView) convertView.findViewById(R.id.actualOffersTripTypeICON);
holder.expandIcon = (ImageView) convertView.findViewById(R.id.expandIcon);
holder.actualOffersExpandLayout = (RelativeLayout) convertView.findViewById(R.id.actualOffersExpandLayout);
convertView.setTag(holder);
} else {
holder = (ViewHolder)convertView.getTag();
}
holder.cities.setText(offersList.get(position).getStart() + " [img src=ic_in_text_arrow/] " + offersList.get(position).getDestination());
holder.date.setText(offersList.get(position).getCreatedAt());
if(offersList.get(position).getFrequency().equals("once")){
holder.typeIcon.setImageDrawable(getResources().getDrawable(R.drawable.ic_in_text_once));
}else{
holder.typeIcon.setImageDrawable(getResources().getDrawable(R.drawable.ic_in_text_infinity));
}
holder.type.setText(offersList.get(position).getType());
holder.shipmentIcon.setImageDrawable(ShipmentTypeEnum.setIconForShipmentType(ShipmentTypeEnum.fromString(offersList.get(position).getShipmentType()), getApplicationContext()));
holder.transportIcon.setImageDrawable(TransportTypeEnum.setIconForTransportType(TransportTypeEnum.fromString(offersList.get(position).getTransportType()), getApplicationContext()));
holder.deleteOffer.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
holder.editOffer.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
holder.addSimilar.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
holder.addOpposite.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
holder.expandIcon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if(isExpand){
holder.actualOffersExpandLayout.setVisibility(View.INVISIBLE);
isExpand = false;
}else{
holder.actualOffersExpandLayout.setVisibility(View.VISIBLE);
isExpand = true;
}
}
});
holder.infoIcon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
return convertView;
}
}
public static class ViewHolder {
public TextViewWithImage cities;
public TextView date;
public TextView type;
public TextView shipment;
public TextView transport;
public TextView deleteOffer;
public TextView editOffer;
public TextView addSimilar;
public TextView addOpposite;
public ImageView infoIcon;
public ImageView shipmentIcon;
public ImageView transportIcon;
public ImageView typeIcon;
public ImageView expandIcon;
public RelativeLayout actualOffersExpandLayout;
}
}
否，当我点击第一项中的holder.expandIcon时，展开列表最后一项中的布局显示。如何使用我的项目创建列表并正确地点击每个项目中的图像？
答案 0 :(得分：1)
您正在扩展列表中的最后一项，因为这是getView检索的最后一个视图。现在编写代码的方式只有一个isExpand值。
因此，您需要（a）在ViewHolder上添加isExpand，以及（b）使用附加到事件处理程序中传递的View的ViewHolder。像这样：
holder.expandIcon.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
ViewHolder vh = (ViewHolder)v.getTag();
if(vh.isExpand){
vh.actualOffersExpandLayout.setVisibility(View.INVISIBLE);
vh.isExpand = false;
}else{
vh.actualOffersExpandLayout.setVisibility(View.VISIBLE);
vh.isExpand = true;
}
}
});