我在片段中使用列表视图，使用json加载数据，因为我无法查看列表视图。在sched中显示构造函数从未使用过我不知道我在哪里做错了代码。服务器部分工作正常。
片段：
import { Component, ChangeDetectorRef } from 'angular2/core';
constructor(private cdr:ChangeDetectorRef) {
}
public setValue(a,b,c) {
this.coutnry = a;
this.state = b;
this.city = c;
this.sharedService.country = this.coutnry;
this.sharedService.city = this.city;
this.sharedService.state = this.state;
console.log(a, b, c);
this.cdr.detectChanges();
}
ListAdapter：
public class SchedulessFragment extends Fragment{
private static final String TAG = MatAct.class.getSimpleName();
private static final String url = "http://nammakovai2015-001-site1.1tempurl.com/iplspin/schedules.php";
ProgressDialog pDialog;
List<Sched> movieList = new ArrayList<Sched>();
ListView listview;
CustomListAdapter adapter;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v = inflater.inflate(R.layout.schedule_frag, container, false);
adapter = new CustomListAdapter(getActivity(), movieList);
listview = (ListView) v.findViewById(R.id.listView1);
listview.setAdapter(adapter);
// TextView tv = (TextView) v.findViewById(R.id.tvfrag);
// tv.setText(getArguments().getString("msg"));
// tv.setText("Hello");
pDialog = new ProgressDialog(getActivity());
// Showing progress dialog before making http request
pDialog.setMessage("Loading...");
pDialog.show();
// changing action bar color
// Creating volley request obj
JsonArrayRequest movieReq = new JsonArrayRequest(url,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
Log.d(TAG, response.toString());
hidePDialog();
// Parsing json
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Sched m = new Sched();
m.setTeama(obj.getString("teama"));
m.setTeamb(obj.getString("teamb"));
m.setTdate(obj.getString("tdate"));
m.setTtime(obj.getString("ttime"));
m.setThumbnailUrl(obj.getString("thumbnailUrl"));
m.setTeambthumbnailUrl(obj.getString("teambthumbnailUrl"));
m.setVenue(obj.getString("venue"));
// adding movie to movies array
movieList.add(m);
} catch (JSONException e) {
e.printStackTrace();
}
}
// notifying list adapter about data changes
// so that it renders the list view with updated data
adapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d(TAG, "Error: " + error.getMessage());
hidePDialog();
}
});
// Adding request to request queue
AppController.getInstance().addToRequestQueue(movieReq);
return v;
}
@Override
public void onDestroy() {
super.onDestroy();
hidePDialog();
}
private void hidePDialog() {
if (pDialog != null) {
pDialog.dismiss();
pDialog = null;
}
}
public static SchedulessFragment newInstance(String text) {
SchedulessFragment f = new SchedulessFragment();
Bundle b = new Bundle();
b.putString("msg", text);
f.setArguments(b);
return f;
}}
附表：
public class CustomListAdapter extends BaseAdapter{
private Activity activity;
private LayoutInflater inflater;
List<Sched> movieItems;
ImageLoader imageLoader = AppController.getInstance().getImageLoader();
public CustomListAdapter(Activity activity, List<Sched> movieItems) {
this.activity = activity;
this.movieItems = movieItems;
}
@Override
public int getCount() {
return movieItems.size();
}
@Override
public Object getItem(int location) {
return movieItems.get(location);
}
@Override
public long getItemId(int position) {
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
if (inflater == null)
inflater = (LayoutInflater) activity
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if (convertView == null)
convertView = inflater.inflate(R.layout.listitem_ros, null);
if (imageLoader == null)
imageLoader = AppController.getInstance().getImageLoader();
NetworkImageView thumbNail = (NetworkImageView) convertView
.findViewById(R.id.pict);
NetworkImageView teambthumbnail=(NetworkImageView) convertView.findViewById(R.id.pict1);
TextView teama = (TextView) convertView.findViewById(R.id.scheduleteama_name);
TextView teamb = (TextView) convertView.findViewById(R.id.schduleteamb_name);
TextView tdate = (TextView) convertView.findViewById(R.id.datess);
TextView ttime = (TextView) convertView.findViewById(R.id.timess);
TextView venue=(TextView)convertView.findViewById(R.id.schedulevenue);
// getting movie data for the row
Sched m = movieItems.get(position);
// thumbnail image
thumbNail.setImageUrl(m.getThumbnailUrl(), imageLoader);
teambthumbnail.setImageUrl(m.getTeambthumbnailUrl(),imageLoader);
// title
teama.setText(m.getTeama());
teamb.setText(m.getTeamb());
tdate.setText(m.getTdate());
ttime.setText(m.getTtime());
venue.setText(m.getVenue());
return convertView;
}}
的xml：
public class Sched {
private String teama,teamb,tdate,ttime,thumbnailUrl,teambthumbnailUrl,venue;
public Sched(){}
public Sched(String teama, String teamb, String tdate, String ttime, String thumbnailUrl, String teambthumbnailurl, String venue)
{
this.teama=teama;
this.teamb=teamb;
this.tdate=tdate;
this.ttime=ttime;
this.thumbnailUrl=thumbnailUrl;
this.teambthumbnailUrl=teambthumbnailurl;
this.venue=venue;
}
public String getTeama(){
return teama;
}
public void setTeama(String teama){
this.teama=teama;
}
public String getTeamb(){
return teamb;
}
public void setTeamb(String teamb){
this.teamb=teamb;
}
public String getTdate(){
return tdate;
}
public void setTdate(String tdate){
this.tdate=tdate;
}
public String getTtime(){
return ttime;
}
public void setTtime(String ttime){
this.ttime=ttime;
}
public String getThumbnailUrl() {
return thumbnailUrl;
}
public void setThumbnailUrl(String thumbnailUrl) {
this.thumbnailUrl = thumbnailUrl;
}
public String getTeambthumbnailUrl() {
return teambthumbnailUrl;
}
public void setTeambthumbnailUrl(String teambthumbnailUrl){
this.teambthumbnailUrl=teambthumbnailUrl;
}
public String getVenue(){
return venue;
}
public void setVenue(String venue){
this.venue=venue;
}}
答案 0 :(得分：0)
您的问题是您在填充movieList之前正在创建适配器。移动这两行：
adapter = new CustomListAdapter(getActivity(), movieList);
listview.setAdapter(adapter);
在您将电影添加到列表中的for循环之后：
for (int i = 0; i < response.length(); i++) {
try {
JSONObject obj = response.getJSONObject(i);
Sched m = new Sched();
m.setTeama(obj.getString("teama"));
m.setTeamb(obj.getString("teamb"));
m.setTdate(obj.getString("tdate"));
m.setTtime(obj.getString("ttime"));
m.setThumbnailUrl(obj.getString("thumbnailUrl"));
m.setTeambthumbnailUrl(obj.getString("teambthumbnailUrl"));
m.setVenue(obj.getString("venue"));
// adding movie to movies array
movieList.add(m);
} catch (JSONException e) {
e.printStackTrace();
}
//PUT THOSE TWO LINES HERE
假设您的Request状态良好且返回非空JSONArray，则应该可以。