Données ViewPager perdues lors du retour de l'écran suivant
J'utilise un ViewPager dans mon application et j'ai trois onglets dedans; J'utilise ViewPager à l'intérieur d'un fragment. Maintenant, le problème est que je reçois correctement les données lors du chargement de l'application, mais lorsque je passe à la page suivante puis à ViewPager, les données sont perdues et les onglets ne fonctionnent pas. S'il vous plaît aidez-moi. Ci-dessous mon code:
import com.devpoint.rprtjobs.R;
import Android.support.v4.app.Fragment;
import Android.support.v4.app.FragmentTabHost;
import Android.support.v4.view.ViewPager;
import Android.support.v4.view.ViewPager.OnPageChangeListener;
import Android.support.v7.app.ActionBarActivity;
import Android.support.v7.widget.Toolbar;
import Android.os.Bundle;
import Android.view.LayoutInflater;
import Android.view.Menu;
import Android.view.MenuItem;
import Android.view.View;
import Android.view.ViewGroup;
import Android.support.design.widget.TabLayout;
public class MainActivity extends Fragment {
// Declaring Your View and Variables
Toolbar toolbar;
ViewPager pager;
SwipeViewPagerAdapter adapter;
SlidingTabLayout tabs;
CharSequence Titles[]={"OnGoing","UpComing","Expired"};
int Numboftabs =3;
private View rootView;
@SuppressWarnings("deprecation")
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
try {
rootView = inflater.inflate(R.layout.activity_main,
container, false);
adapter = new SwipeViewPagerAdapter(getActivity().getSupportFragmentManager(),Titles,Numboftabs);
// Assigning ViewPager View and setting the adapter
pager = (ViewPager) rootView.findViewById(R.id.pager);
pager.setAdapter(adapter);
// Assiging the Sliding Tab Layout View
tabs = (SlidingTabLayout) rootView.findViewById(R.id.tabs);
tabs.setDistributeEvenly(true); // To make the Tabs Fixed set this true, This makes the tabs Space Evenly in Available width
// Setting Custom Color for the Scroll bar indicator of the Tab View
tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {
@Override
public int getIndicatorColor(int position) {
return getResources().getColor(R.color.tabsScrollColor);
}
});
// Setting the ViewPager For the SlidingTabsLayout
tabs.setViewPager(pager);
pager.setOffscreenPageLimit(3);
pager.setOnPageChangeListener(new OnPageChangeListener() {
public void onPageScrollStateChanged(int state) {}
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {}
public void onPageSelected(int position) {
if(position ==0)
{
SwipeViewPagerAdapter.Pagename = "ListOnGoing";
}
else if(position ==1)
{
SwipeViewPagerAdapter.Pagename = "ListUpComing";
}
else if(position ==2)
{
SwipeViewPagerAdapter.Pagename = "ListExpired";
}
}
});
}
catch(Exception e)
{
e.printStackTrace();
}
return rootView;
}
}
Voici mon adaptateur:
import Android.support.v4.app.Fragment;
import Android.support.v4.app.FragmentManager;
import Android.support.v4.app.FragmentPagerAdapter;
import Android.support.v4.app.FragmentStatePagerAdapter;
/**
* Created by Edwin on 15/02/2015.
*/
public class SwipeViewPagerAdapter extends FragmentPagerAdapter {
CharSequence Titles[]; // This will Store the Titles of the Tabs which are Going to be passed when ViewPagerAdapter is created
int NumbOfTabs; // Store the number of tabs, this will also be passed when the ViewPagerAdapter is created
public static String Pagename="ListOnGoing";
// Build a Constructor and assign the passed Values to appropriate values in the class
public SwipeViewPagerAdapter(FragmentManager fm,CharSequence mTitles[], int mNumbOfTabsumb) {
super(fm);
this.Titles = mTitles;
this.NumbOfTabs = mNumbOfTabsumb;
}
//This method return the fragment for the every position in the View Pager
@Override
public Fragment getItem(int position) {
switch (position) {
case 0:
//Pagename = "ListOnGoing";
ListOnGoing mListOnGoing = new ListOnGoing();
return mListOnGoing;
case 1:
//Pagename = "ListUpComing";
ListUpComing mListUpComing = new ListUpComing();
return mListUpComing;
case 2:
//Pagename = "ListExpired";
ListExpaire mListExpaire = new ListExpaire();
return mListExpaire;
default:
return null;
}
}
// This method return the titles for the Tabs in the Tab Strip
@Override
public CharSequence getPageTitle(int position) {
return Titles[position];
}
// This method return the Number of tabs for the tabs Strip
@Override
public int getCount() {
return NumbOfTabs;
}
}
Et voici un de mes fragments:
import Java.util.ArrayList;
import Java.util.HashMap;
import Java.util.List;
import Java.util.concurrent.CopyOnWriteArrayList;
@SuppressLint("ShowToast")
public class ListOnGoing extends Fragment implements OnItemClickListener {
Boolean isInternetPresent = false;
ConnectionDetector connectdetector;
public static ListView swipelisview;
Activity activity;
public static ProductListAdapter productListAdapter;
SharedPreference sharedPreference;
String LoggedIn;
boolean fragmentAlreadyLoaded = false;
@SuppressWarnings("deprecation")
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
this.listener = (FragmentActivity) activity;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
}
@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
try {
super.onViewCreated(view, savedInstanceState);
swipelisview = (ListView) rootView.findViewById(R.id.list);
View emptyView = rootView.findViewById(R.id.emptyView);
swipelisview.setEmptyView(emptyView);
if (savedInstanceState == null && !fragmentAlreadyLoaded) {
fragmentAlreadyLoaded = true;
repoObject = SplashScreen.getRepo();
session = new SessionManager(getActivity());
HashMap<String, String> Radious = session.getRadiousName();
Radiosname = Radious.get(SessionManager.KEY_RadiousName);
//LoadActivity.Status="";
GPlaces = new GetAllGooglePlaces();
GPlaces.GetOpportunityList("", Radiosname, getActivity());
DisPlayOppList();
}
productListAdapter = new ProductListAdapter(getActivity(),
GetAllGooglePlaces.ArrayListOngoing);
swipelisview.setAdapter(productListAdapter);
productListAdapter.notifyDataSetChanged();
session = new SessionManager(getActivity());
HashMap<String, String> Radious = session.getRadiousName();
Radiosname = Radious.get(SessionManager.KEY_RadiousName);
searchedit = (EditText) rootView.findViewById(R.id.searchbox);
Button searchbtn = (Button) rootView.findViewById(R.id.searchbtn);
searchedit = (EditText) rootView.findViewById(R.id.searchbox);
clearbtn = (Button) rootView.findViewById(R.id.clearbtn);
searchedit.addTextChangedListener(watch);
clearbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
LoadActivity.Status="";
searchedit.setText("");
GPlaces.GetOpportunityList("", Radiosname, getActivity());
DisPlayOppList();
}
});
searchbtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
getActivity().runOnUiThread(new Runnable() {
public void run() {
multipleCat = "";
GetAllGooglePlaces.ArrayListOngoing = new CopyOnWriteArrayList<>();
SearchText = searchedit.getText()
.toString();
LoadActivity.Status = "Search";
if (LoadActivity.isOnline) {
GPlaces.GetOpportunityList(SearchText, Radiosname, getActivity());
DisPlayOppList();
}
else {
List<OpportunityTable> alloffers = repoObject.roffertable
.getAlloffersbySearchKeyword(SearchText);
if (alloffers != null) {
GPlaces.FillArrayListOffline(alloffers,"OnGoing");
}
}
}
});
}
});
HashMap<String, String> user = session.getLogin();
LoggedIn = user.get(SessionManager.KEY_Login);
if (LoggedIn == null) {
LoggedIn = "";
}
connectdetector = new ConnectionDetector(getActivity());
try {
// Check if Internet present
isInternetPresent = connectdetector.isConnectingToInternet();
} catch (Exception e) {
e.printStackTrace();
PostLogcatErrors ple = new PostLogcatErrors();
ple.PostLogcatErorrs(e);
}
footerlayout = (LinearLayout) rootView.findViewById(R.id.footerlayout);
footerlayout.setOnTouchListener(new OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
swipelisview.requestDisallowInterceptTouchEvent(true);
return true;
}
});
swipelisview.setOnItemClickListener(new OnItemClickListener() {
public void onItemClick(AdapterView<?> arg0, View v,
final int position, long id) {
InputMethodManager imm = (InputMethodManager) getActivity()
.getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(swipelisview.getWindowToken(), 0);
try {
final DetailsViewpagerFragment mDetailsViewpagerFragment = new DetailsViewpagerFragment();
String url;
if (LoadActivity.isOnline) {
progresdialog = new ProgressDialog(getActivity());
progresdialog.setMessage(Html
.fromHtml("<b>Search</b><br/>Loading Details..."));
progresdialog.setIndeterminate(false);
progresdialog.setCancelable(false);
progresdialog.show();
ListDetails product = GetAllGooglePlaces.ArrayListOngoing
.get(position);
OpportunityID = product.getOfferID();
url = LoadActivity.BaseUri + "SaveUserViewedOpportunities";
JsonObjectRequest jsObjRequest;
jsObjRequest = new JsonObjectRequest(
Request.Method.POST, url,
getSaveViewUserParams(),
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
pagename = "Userplaceslist";
mDetailsViewpagerFragment
.setClickList(position);
FragmentManager fragment = getFragmentManager();
fragment.beginTransaction()
.replace(R.id.frame_container,
mDetailsViewpagerFragment)
.commit();
LoadActivity.CURRENTFRAGMENT = EnumModuleTags.SinglePlaceActivity;
ModuleFragmentBackStackingClass
.AddtoStack(
mDetailsViewpagerFragment,
EnumModuleTags.SinglePlaceActivity,
getString(R.string.mainfrgment_rprt));
LoadActivity.updateActionbarMenu();
progresdialog.dismiss();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(
VolleyError error) {
Toast.makeText(getActivity(), "False",
Toast.LENGTH_LONG).show();
progresdialog.dismiss();
}
});
AppController.getInstance().addToRequestQueue(
jsObjRequest);
} else {
mDetailsViewpagerFragment.setClickList(position);
FragmentManager fragment = getFragmentManager();
fragment.beginTransaction()
.replace(R.id.frame_container,
mDetailsViewpagerFragment).commit();
LoadActivity.CURRENTFRAGMENT = EnumModuleTags.SinglePlaceActivity;
ModuleFragmentBackStackingClass.AddtoStack(
mDetailsViewpagerFragment,
EnumModuleTags.SinglePlaceActivity,
getString(R.string.mainfrgment_rprt));
}
} catch (Exception e) {
e.printStackTrace();
PostLogcatErrors ple = new PostLogcatErrors();
ple.PostLogcatErorrs(e);
}
}
private JSONObject getSaveViewUserParams() {
JSONObject params = new JSONObject();
HashMap<String, String> UserId = session.getUserID();
String UserIdVal = UserId.get(SessionManager.KEY_UserID);
if (!(UserIdVal == null)) {
UserIdVal = UserId.get(SessionManager.KEY_UserID);
} else {
UserIdVal = "0";
}
try {
params.put("UserId", UserIdVal);
params.put("OpportunityID", OpportunityID);
params.put("UserViewedID", 0);
params.put("Shortlisted", true);
params.put("KeyValue", null);
} catch (JSONException e) {
e.printStackTrace();
PostLogcatErrors ple = new PostLogcatErrors();
ple.PostLogcatErorrs(e);
}
return params;
}
});
// Click The FavoritesItem on LongPress
swipelisview.setOnItemLongClickListener(new OnItemLongClickListener() {
@Override
public boolean onItemLongClick(AdapterView<?> parent, View view,
int position, long id) {
InputMethodManager imm;
imm = (InputMethodManager) getActivity()
.getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(swipelisview.getWindowToken(), 0);
try {
ImageView button;
button = (ImageView) view
.findViewById(R.id.fav_checkbox);
String tag = button.getTag().toString();
if (tag.equals(getString(R.string.grey_favcolor))) {
sharedPreference.addFavorite(activity,
GetAllGooglePlaces.ArrayListOngoing.get(position));
button.setTag(getString(R.string.red_favcolor));
button.setImageResource(R.drawable.checked);
} else if (tag.equals(getString(R.string.red_favcolor))){
sharedPreference.removeFavorite(activity,
GetAllGooglePlaces.ArrayListOngoing.get(position));
button.setTag(getString(R.string.grey_favcolor));
button.setImageResource(R.drawable.unchecked);
}
return true;
} catch (NotFoundException e) {
e.printStackTrace();
PostLogcatErrors ple = new PostLogcatErrors();
ple.PostLogcatErorrs(e);
Toast.makeText(getActivity(), e.getMessage(),
Toast.LENGTH_LONG).show();
e.printStackTrace();
}
return true;
}
});
// Code placed here will be executed even when the fragment comes from
// backstack
} catch (Exception e) {
e.printStackTrace();
PostLogcatErrors ple = new PostLogcatErrors();
ple.PostLogcatErorrs(e);
}
}
// String APIkey ="AIzaSyCAekTB0o1MuSYvUb-8HTZxhlJHE8yBUfI";
@Override
public void onCreate(Bundle savedInstanceState) {
try {
super.onCreate(savedInstanceState);
activity = getActivity();
sharedPreference = new SharedPreference();
//setRetainInstance(true);
} catch (Exception e) {
e.printStackTrace();
PostLogcatErrors ple = new PostLogcatErrors();
ple.PostLogcatErorrs(e);
}
}
@SuppressWarnings("static-access")
@SuppressLint({ "CutPasteId", "ClickableViewAccessibility" })
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
try {
//setRetainInstance(true);
try
{
Tracker t = ((Analytics) getActivity().getApplication()).getTracker(
TrackerName.APP_TRACKER);
t.setScreenName("UserPlaces Listview");
t.send(new HitBuilders.AppViewBuilder().build());
}
catch(Exception e)
{
Toast.makeText(getActivity().getApplication(), "Error"+e.getMessage(), 1).show();
}
rootView = inflater.inflate(R.layout.user_places_listview, container,
false);
swipelisview = (ListView) rootView.findViewById(R.id.list);
View emptyView = rootView.findViewById(R.id.emptyView);
swipelisview.setEmptyView(emptyView);
return rootView;
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
return rootView;
}
TextWatcher watch = new TextWatcher(){
@Override
public void afterTextChanged(Editable arg0) {
}
@Override
public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,
int arg3) {
}
@Override
public void onTextChanged(CharSequence s, int a, int b, int c) {
if(c == 0){
clearbtn.setVisibility(View.GONE);
}
else {
clearbtn.setVisibility(View.VISIBLE);
}
}};
protected void LoadSearchPlaces(String searchparam) {
try {
if (LoadActivity.isOnline) {
JsonArrayRequest movieReq = new JsonArrayRequest("http://192.168.2.10/RPRT.WebApi/api/RPRT/" + "SearchPlaces/"+searchparam,
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
List<HashMap<String, String>> aList = new ArrayList<>();
for (int i = 0; i < response.length(); i++) {
JSONObject json_data;
try {
json_data = response.getJSONObject(i);
HashMap<String, String> hm = new HashMap<>();
hm.put("Address", json_data.getString("Address"));
hm.put("City", json_data.getString("City"));
hm.put("Latitude", json_data.getString("Latitude"));
hm.put("Longitude", json_data.getString("Longitude"));
aList.add(hm);
} catch (JSONException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
String[] from = { "Address"} ;
int[] to = { R.id.tv };
SimpleAdapter adapterId = new SimpleAdapter(getActivity(), aList,
R.layout.user_places_dropdown_listitem, from, to);
//final AutoCompleteTextView autoCompView = (AutoCompleteTextView) rootView.findViewById(R.id.autoCompleteTextView);
autoCompView.setAdapter(adapterId);
autoCompView.setThreshold(1);
// Pname.setThreshold(1);
autoCompView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@SuppressWarnings("unchecked")
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
HashMap<String, String> hm = (HashMap<String, String>) parent
.getAdapter().getItem(position);
autoCompView.setText(hm.get("Address"));
SplashScreen.nwLocation.setLatitude(Double.parseDouble(hm.get("Latitude")));
SplashScreen.nwLocation.setLongitude(Double.parseDouble(hm.get("Longitude")));
HashMap<String, String> Radious = session.getRadiousName();
final String Radiosname;
Radiosname = Radious.get(SessionManager.KEY_RadiousName);
multipleCat="";
ProgressDialog progresdialog = new ProgressDialog(getActivity());
progresdialog.setMessage(Html
.fromHtml("<b>Search</b><br/>Loading Details..."));
progresdialog.setIndeterminate(false);
progresdialog.setCancelable(false);
//progresdialog.show();
LoadActivity.Status="";
GPlaces.GetOpportunityList(SearchText, Radiosname, getActivity());
DisPlayOppList();
searchdialog.cancel();
}
});
}
},
new com.Android.volley.Response.ErrorListener() {
@Override
public void onErrorResponse(
VolleyError error) {
}
});
AppController.getInstance().addToRequestQueue(movieReq);
}
} catch (Exception e) {
e.printStackTrace();
}
}
private void DisPlayOppList() {
try {
pdialog = new ProgressDialog(getActivity());
pdialog.setMessage(Html.fromHtml("<b>Search</b><br/>Loading Details..."));
pdialog.setIndeterminate(false);
pdialog.setCancelable(false);
if(LoadActivity.Status.equals("Slidemenulist"))
{
int CategoryId = 0;
switch (CopyOfListOnGoing.multipleCat) {
case "Books":
CategoryId = 1;
break;
case "BeautyandFashion":
CategoryId = 2;
break;
case "Electronic":
CategoryId = 3;
break;
case "Food":
CategoryId = 4;
break;
case "HomeService":
CategoryId = 5;
break;
case "Jobs":
CategoryId = 6;
break;
case "RealEstate":
CategoryId = 7;
break;
case "Vehicles":
CategoryId = 8;
break;
}
List<OpportunityTable> alloffers = repoObject.roffertable
.getAllCatOpp(CategoryId , Radiosname);
if (alloffers != null) {
GPlaces.FillArrayListOffline(alloffers,"OnGoing");
}
} else {
List<OpportunityTable> alloffers = repoObject.roffertable
.getAlloffers(Integer.parseInt(Radiosname));
if (alloffers != null) {
GPlaces.FillArrayListOffline(alloffers,"OnGoing");
}
}
}
catch (Exception e) {
e.printStackTrace();
PostLogcatErrors ple = new PostLogcatErrors();
ple.PostLogcatErorrs(e);
}
}
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
InputMethodManager imm = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE);
imm.hideSoftInputFromWindow(getActivity().getCurrentFocus().getWindowToken(), 0);
multipleCat = "";
DisPlayOppList();
}
/* @Override
public void onResume() {
Log.e("DEBUG", "onResume of Userplace ListView");
super.onResume();
}*/
@Override
public void onPause() {
Log.e("DEBUG", "OnPause of Userplace ListView");
super.onPause();
}
}
Et les fragments restants se ressemblent. Aidez-moi, s'il vous plaît.
Après quelques recherches, j'ai trouvé la solution à mon problème.
J'appelais à l'origine getactivity().getSupportFragmentmanager(). Cependant, le code correct est getChildFragmentManager()
Dans votre adaptateur, étendez FragmentStatePagerAdapter au lieu de FragmentPagerAdapter, cela résoudra votre problème et vous permettra de savoir si vous avez un problème.
pager = (ViewPager) rootView.findViewById(R.id.pager);
pager.setOffscreenPageLimit(2);// no of fragments
public float getPageWidth(int position)
{
if (position == 0 || position == 2)
{
return 0.8f;
}
return 1f;
}