那边的所有安卓人员都好！ 我想从Web服务获取对象列表，并希望在列表视图中显示它们。现在我能够获取这些值并在arraylist中收集它们。但是我面临的问题是在列表视图中显示它们。我是我的代码。
使用每个人的建议，我解决了我的问题。这就是安卓机友的精神。我在 UPDATED 块中粘贴了我的答案。希望将来有用。
已更新
public class TabFragment2 extends android.support.v4.app.Fragment {
ListView FacultyList;
View rootView;
LinearLayout courseEmptyLayout;
FacultyListAdapter facultyListAdapter;
String feedbackresult,programtype,programname;
Boolean FeedBackResponse;
String FacultiesList[];
public ArrayList<Faculty> facultylist = new ArrayList<Faculty>();
SharedPreferences pref;
FacultyListAdapter adapter;
SessionSetting session;
public TabFragment2(){
}
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
pref = getActivity().getSharedPreferences("prefbook", getActivity().MODE_PRIVATE);
programtype = pref.getString("programtype", "NOTHINGpref");
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.activity_studenttab2, container, false);
session = new SessionSetting(getActivity());
new FacultySyncerBg().execute("");
courseEmptyLayout = (LinearLayout) rootView.findViewById(R.id.feedback_empty_layout);
FacultyList = (ListView) rootView.findViewById(R.id.feedback_list);
facultyListAdapter = new FacultyListAdapter(getActivity());
FacultyList.setEmptyView(rootView.findViewById(R.id.feedback_list));
FacultyList.setAdapter(facultyListAdapter);
return rootView;
}
public class FacultyListAdapter extends BaseAdapter {
private final Context context;
public FacultyListAdapter(Context context) {
this.context = context;
if (!facultylist.isEmpty())
courseEmptyLayout.setVisibility(LinearLayout.GONE);
}
@Override
public View getView(final int position, View convertView,
ViewGroup parent) {
final ViewHolder TabviewHolder;
if (convertView == null) {
TabviewHolder = new ViewHolder();
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView = inflater.inflate(R.layout.list_item_feedback,
parent, false);
TabviewHolder.FacultyName = (TextView) convertView.findViewById(R.id.FacultyName);//facultyname
TabviewHolder.rating = (RatingBar) convertView.findViewById(R.id.rating);//rating starts
TabviewHolder.Submit = (Button) convertView.findViewById(R.id.btnSubmit);
// Save the holder with the view
convertView.setTag(TabviewHolder);
} else {
TabviewHolder = (ViewHolder) convertView.getTag();
}
final Faculty mFac = facultylist.get(position);//*****************************NOTICE
TabviewHolder.FacultyName.setText(mFac.getEmployeename());
// TabviewHolder.ModuleName.setText(mFac.getSubject());
TabviewHolder.rating.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
public void onRatingChanged(RatingBar ratingBar, float rating,
boolean fromUser) {
feedbackresult =String.valueOf(rating);
}
});
return convertView;
}
@Override
public int getCount() {
return facultylist.size();
}
@Override
public Object getItem(int position) {return facultylist.get(position);
}
@Override
public long getItemId(int position) {
return position;
}
}
static class ViewHolder {
TextView FacultyName;
RatingBar rating;
Button Submit;
}
private class FacultySyncerBg extends AsyncTask<String, Integer, Void> {
ProgressDialog progressDialog;
@Override
protected void onPreExecute() {
progressDialog= ProgressDialog.show(getActivity(), "Faculty Feedback!","Fetching Faculty List", true);
}
@Override
protected Void doInBackground(String... params) {
//CALLING WEBSERVICE
Faculty(programtype);
return null;
}
@Override
protected void onPostExecute(Void result) {
/*if (FacultyList.getAdapter() != null) {
if (FacultyList.getAdapter().getCount() == 0) {
FacultyList.setAdapter(facultyListAdapter);
} else
{
facultyListAdapter.notifyDataSetChanged();
}
} else {
FacultyList.setAdapter(facultyListAdapter);
}
progressDialog.dismiss();*/
if (!facultylist.isEmpty()) {
// FacultyList.setVisibiltity(View.VISIBLE) ;
courseEmptyLayout.setVisibility(LinearLayout.GONE);
if (FacultyList.getAdapter() != null)
{
if (FacultyList.getAdapter().getCount() == 0)
{
FacultyList.setAdapter(facultyListAdapter);
}
else
{
facultyListAdapter.notifyDataSetChanged();
}
}
else
{
FacultyList.setAdapter(facultyListAdapter);
}
}else
{
courseEmptyLayout.setVisibility(LinearLayout.VISIBLE);
// FacultyList.setVisibiltity(View.GONE) ;
}
progressDialog.dismiss();
}
}
@Override
public void setUserVisibleHint(boolean isVisibleToUser) {
super.setUserVisibleHint(isVisibleToUser);
if (isVisibleToUser && isResumed()) {
new FacultySyncerBg().execute("");
}
}//end*
//**************************WEBSERVICE CODE***********************************
public void Faculty(String programtype)
{
String URL ="http://detelearning.cloudapp.net/det_skill_webservice/service.php?wsdl";
String METHOD_NAMEFACULTY = "getUserInfo";
String NAMESPACEFAC="http://localhost", SOAPACTIONFAC="http://detelearning.cloudapp.net/det_skill_webservice/service.php/getUserInfo";
String faculty[]=new String[4];//changeit
String webprogramtype="flag";
String programname="DESHPANDE SUSANDHI ELECTRICIAN FELLOWSHIP";
// Create request
SoapObject request = new SoapObject(NAMESPACEFAC, METHOD_NAMEFACULTY);
request.addProperty("fellowshipname", programname);
// Create envelope
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
// Set output SOAP object
envelope.setOutputSoapObject(request);
// Create HTTP call object
HttpTransportSE androidHttpTransport = new HttpTransportSE(URL);
try {
//my code Calling Soap Action
androidHttpTransport.call(SOAPACTIONFAC, envelope);
// ArrayList<Faculty> facultylist = new ArrayList<Faculty>();
java.util.Vector<SoapObject> rs = (java.util.Vector<SoapObject>) envelope.getResponse();
if (rs != null)
{
for (SoapObject cs : rs)
{
Faculty rp = new Faculty();
rp.setEmployeename(cs.getProperty(0).toString());//program name
rp.setEmployeeid(cs.getProperty(1).toString());//employee name
facultylist.add(rp);
}
}
}
catch (Exception e) {
e.printStackTrace();
}
}
}
答案 0 :(得分：2)
if (lstView.getAdapter() != null) {
if (lstView.getAdapter().getCount() == 0) {
lstView.setAdapter(finalAdapter);
} else {
finalAdapter.notifyDataSetChanged();
}
} else {
lstView.setAdapter(finalAdapter);
}
和setVisibiltity(View.VISIBLE)
将此代码放在此处
@Override
protected void onPostExecute(Void result) {
if (!facultylist.isEmpty()) {
FacultyList.setVisibiltity(View.VISIBLE) ;
courseEmptyLayout.setVisibility(LinearLayout.GONE);
if (FacultyList.getAdapter() != null) {
if (FacultyList.getAdapter().getCount() == 0) {
FacultyList.setAdapter(facultyListAdapter);
} else {
facultyListAdapter.notifyDataSetChanged();
}
} else {
FacultyList.setAdapter(facultyListAdapter);
}
}else{
courseEmptyLayout.setVisibility(LinearLayout.VISIBLE);
FacultyList.setVisibiltity(View.GONE) ;
}
progressDialog.dismiss();
}
答案 1 :(得分：0)
你可以试试这个：
这是适配器类代码。
public class CustomTaskHistory extends ArrayAdapter<String> {
private Activity context;
ArrayList<String> listTasks = new ArrayList<String>();
String fetchRefID;
StringBuilder responseOutput;
ProgressDialog progress;
String resultOutput;
public String getFetchRefID() {
return fetchRefID;
}
public void setFetchRefID(String fetchRefID) {
this.fetchRefID = fetchRefID;
}
public CustomTaskHistory(Activity context, ArrayList<String> listTasks) {
super(context, R.layout.content_main, listTasks);
this.context = context;
this.listTasks = listTasks;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = context.getLayoutInflater();
View listViewItem = inflater.inflate(R.layout.list_task_history, null, true);
TextView textViewName = (TextView) listViewItem.findViewById(R.id.textViewName);
LinearLayout linearLayout = (LinearLayout) listViewItem.findViewById(R.id.firstLayout);
//System.out.println("client_id" + _clientID);
//TextView textViewDesc = (TextView) listViewItem.findViewById(R.id.textViewDesc);
//ImageView image = (ImageView) listViewItem.findViewById(R.id.imageView);
if (position % 2 != 0) {
linearLayout.setBackgroundResource(R.color.sky_blue);
} else {
linearLayout.setBackgroundResource(R.color.white);
}
textViewName.setText(listTasks.get(position));
return listViewItem;
}
}
现在在父类中，你必须已经在xml文件中添加了一个列表视图，所以现在显示的代码如下：
CustomTaskHistory customList = new CustomTaskHistory(TaskHistory.this, task_history_name);
listView = (ListView) findViewById(R.id.listView);
listView.setAdapter(customList);
你也可以点击listview的单元格执行任何操作。如果需要的代码，请在下面添加以下代码：
listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
Intent nextScreen2 = new Intent(getApplicationContext(), SubscribeProgrammes.class);
nextScreen2.putExtra("CLIENT_ID", _clientID);
nextScreen2.putExtra("REFERENCE_ID", reference_IDs.get(i));
startActivity(nextScreen2);
Toast.makeText(getApplicationContext(), "You Clicked " + task_list.get(i), Toast.LENGTH_SHORT).show();
}
});