您好我正在尝试将视图寻呼机添加到我的应用程序中。我已经将我想要的所有细节加载到视图寻呼机中，包括Map（我在某些部分显示它）。但是instantiateItem方法被多次调用。我在哪里弄错了..帮助我。以下是我发布的代码。
public class ViewPagerAdapter extends PagerAdapter
{
Activity context;
List<ListDetails> products;
LayoutInflater inflater;
private String user_latitude;
private String user_longitude;
private double to_latitude;
private Location nwLocation;
AppLocationService appLocationService;
private double to_longitude;
private static View itemView;
private CopyOnWriteArrayList<ListDetails> ListItemsData;
private static GMapV2Direction gmapdirection;
private static GoogleMap gmap;
private JSONObject SaveOfferObj;
static final String ARG_POSITION = "position";
int mCurrentPosition = -1;
private TextView txt_offer;
private TextView txt_distance;
private TextView txt_shop;
private TextView txt_category;
private TextView txt_couponcode;
private RatingBar rat_user;
private TextView txt_enddate;
// private View alertLayout;
private static View alertLayout;
ListDetails product;
private HorizontalListView swipelisview;
private Repo repoObject;
ImageView viewdetails;
TableLayout tbldetails;
public ViewPagerAdapter(Context context, List<ListDetails> products, android.app.FragmentManager fragmentManager) {
this.context = (Activity) context;
this.products = products;
}
@Override
public int getCount() {
return products.size();
}
public ListDetails getItem(int position) {
return products.get(position);
}
/* public NotificationViewPagerAdapter(FragmentManager fm) {
super(fm);
}
@Override
public int getCount() {
return _notificationViewPager.getCount();
}
@Override
public Fragment getItem(int position) {
return NotificationFragment.newInstance(_context, _notificationViewPager.getNotification(position), position, _notificationViewPager.getTotalNotifications());
} */
@Override
public int getItemPosition(Object object) {
int index = products.indexOf(object);
if(index >= 0){
return index;
}else{
return PagerAdapter.POSITION_NONE;
}
}
/*@Override
public boolean isViewFromObject(View view, Object object) {
return view == object;
}*/
@Override
public boolean isViewFromObject(View view, Object object) {
if(object != null){
return ((FrameLayout)object) == view;
//return ((FrameLayout)object).getRootView() == view;
}else{
return false;
}
/*if(object != null){
return ((Fragment)object).getView() == view;
}else{
return false;
}*/
}
@SuppressLint("InflateParams")
@Override
public Object instantiateItem(ViewGroup container, int position) {
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
LayoutInflater li = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
if(itemView==null)
{
if(alertLayout==null)
alertLayout = li.inflate(R.layout.map_dialog,
null);
}
/*if (itemView != null) {
ViewGroup parentViewGroup = (ViewGroup) itemView.getParent();
if (parentViewGroup != null) {
parentViewGroup.removeView(itemView);
//((ViewPager) container).removeView(itemView);
}
} */
try {
//if(itemView == null)
//{
inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
itemView = inflater.inflate(R.layout.single,container, false);
//}
} catch (InflateException e) {
}
try {
txt_offer = (TextView) itemView
.findViewById(R.id.Offer_edittext);
txt_distance = (TextView) itemView
.findViewById(R.id.distance_edittext);
/*TextView txt_area = (TextView) rootView
.findViewById(R.id.area_edittext);*/
txt_shop = (TextView) itemView
.findViewById(R.id.Shop_edittext);
tbldetails = (TableLayout) itemView.findViewById(R.id.tablevielw);
rat_user = (RatingBar) itemView.findViewById(R.id.user_ratingbar);
viewdetails = (ImageView) itemView.findViewById(R.id.btn_details);
viewdetails.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (tbldetails.getVisibility()==View.GONE){
viewdetails.setBackgroundResource(R.drawable.collapse);
expand();
}else{
viewdetails.setBackgroundResource(R.drawable.expand);
collapse();
}
}
});
RatingBar rat_user = (RatingBar) itemView.findViewById(R.id.user_ratingbar);
//ImageView map = (ImageView) itemView.findViewById(R.id.btn_map);
swipelisview = (HorizontalListView) itemView.findViewById(R.id.gridview);
swipelisview.setOnItemClickListener(new OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view,
int position, long id) {
appLocationService = new AppLocationService(context);
nwLocation = appLocationService
.getLocation(LocationManager.NETWORK_PROVIDER);
if (nwLocation == null) {
nwLocation = new Location("");
nwLocation.setLatitude(17.4165);
nwLocation.setLongitude(78.4382);
}
ListDetails mDetails = ListItemsData.get(position);
user_latitude = Double.toString(nwLocation.getLatitude());
user_longitude = Double.toString(nwLocation.getLongitude());
to_latitude =mDetails.getLat();
to_longitude = mDetails.getLng();
String AreaName = mDetails.getAreaName();
String ShopName = mDetails.getShopName();
String ShopID = mDetails.getShopID();
String OfferName = mDetails.getDeal();
float Distance = mDetails.getDistance();
String PromoCode = mDetails.getPromoCode();
String PostedDate = mDetails.getPostedDate();
String EndDate = mDetails.getOfferEndDate();
String Category = mDetails.getCategoryName();
String OfferId = mDetails.getOfferID();
TextView txt_offer = (TextView) itemView
.findViewById(R.id.Offer_edittext);
TextView txt_distance = (TextView) itemView
.findViewById(R.id.distance_edittext);
/*TextView txt_area = (TextView) rootView
.findViewById(R.id.area_edittext);*/
TextView txt_shop = (TextView) itemView
.findViewById(R.id.Shop_edittext);
RatingBar rat_user = (RatingBar) itemView.findViewById(R.id.user_ratingbar);
TextView txt_posteddate = (TextView) itemView
.findViewById(R.id.offerPosted_edittext);
TextView txt_enddate = (TextView) itemView
.findViewById(R.id.OfferEnd_edittext);
TextView txt_category = (TextView) itemView
.findViewById(R.id.category_edittext);
TextView txt_couponcode = (TextView) itemView
.findViewById(R.id.Coupon_edittext);
final ArrayList<String> ImageArrayList = new ArrayList<String>();
String ImageNameStr = mDetails.getImageName1();
final String[] ImageNameArr = ImageNameStr.split(",");
for (int i = 0; i < ImageNameArr.length; i++) {
ImageArrayList.add(ImageNameArr[i]);
}
ViewPager viewPager = (ViewPager) itemView
.findViewById(R.id.view_pager);
ImageAdapter adapter = new ImageAdapter(context,
ImageArrayList);
viewPager.setAdapter(adapter);
CirclePageIndicator mIndicator = (CirclePageIndicator) itemView.findViewById(R.id.indicator);
mIndicator.setViewPager(viewPager);
txt_offer.setText(OfferName);
txt_distance.setText(Distance+" KM Away");
//txt_area.setText(AreaName);
txt_shop.setText(ShopName+" , "+ AreaName);
txt_couponcode.setText(PromoCode);
txt_category.setText(Category);
txt_posteddate.setText(PostedDate);
txt_enddate.setText(EndDate);
rat_user.setRating(3f);
LoadPlaceDetails();
}
});
Button btnrating = (Button) itemView.findViewById(R.id.btn_rating);
btnrating.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
try {
Rating_Listview mRating_Listview = new Rating_Listview();
Bundle PFBundel = new Bundle();
PFBundel.putString("Offer",product.getDeal());
PFBundel.putString("OfferID",product.getOfferID());
android.app.FragmentManager fragment = context.getFragmentManager();
mRating_Listview.setArguments(PFBundel);
fragment.beginTransaction()
.replace(R.id.frame_container, mRating_Listview)
.commit();
LoadActivity.CURRENTFRAGMENT = EnumModuleTags.Rating_Listview;
ModuleFragmentBackStackingClass.AddtoStack(
mRating_Listview,
EnumModuleTags.Rating_Listview,
"RightPlaceRightTime");
} catch (Exception e) {
Toast.makeText(context, e.getMessage(),
Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
});
TextView txt_posteddate = (TextView) itemView
.findViewById(R.id.offerPosted_edittext);
txt_enddate = (TextView) itemView
.findViewById(R.id.OfferEnd_edittext);
txt_category = (TextView) itemView
.findViewById(R.id.category_edittext);
txt_couponcode = (TextView) itemView
.findViewById(R.id.Coupon_edittext);
product = (ListDetails) getItem(position);
final ArrayList<String> ImageArrayList = new ArrayList<String>();
String ImageNameStr = product.getImageName1();
final String[] ImageNameArr = ImageNameStr.split(",");
for (int i = 0; i < ImageNameArr.length; i++) {
ImageArrayList.add(ImageNameArr[i]);
}
ViewPager viewPager = (ViewPager) itemView
.findViewById(R.id.view_pager);
ImageAdapter adapter = new ImageAdapter(context,
ImageArrayList);
viewPager.setAdapter(adapter);
CirclePageIndicator mIndicator = (CirclePageIndicator) itemView.findViewById(R.id.indicator);
mIndicator.setViewPager(viewPager);
appLocationService = new AppLocationService(context);
nwLocation = appLocationService
.getLocation(LocationManager.NETWORK_PROVIDER);
if (nwLocation == null) {
nwLocation = new Location("");
nwLocation.setLatitude(17.4165);
nwLocation.setLongitude(78.4382);
}
user_latitude = Double.toString(nwLocation.getLatitude());
user_longitude = Double.toString(nwLocation.getLongitude());
to_latitude = product.getLat();
to_longitude = product.getLng();
txt_offer.setText(product.getDeal());
txt_distance.setText(product.getDistance()+" KM Away");
//txt_area.setText(AreaName);
txt_shop.setText(product.getShopName()+" , "+ product.getAreaName());
txt_couponcode.setText(product.getPromoCode());
txt_category.setText(product.getCategoryName());
txt_posteddate.setText(product.getPostedDate());
txt_enddate.setText(product.getOfferEndDate());
rat_user.setRating(3f);
final FloatingActionsMenu fmenu = (FloatingActionsMenu) itemView.findViewById(R.id.multiple_actions);
final FloatingActionsMenu fmenu1 = (FloatingActionsMenu) itemView.findViewById(R.id.multiple_actions1);
fmenu.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
fmenu1.collapse();
}
});
fmenu1.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
fmenu.collapse();
}
});
//}
((ViewPager) container).addView(itemView , 0);
//return itemView;
} catch (Exception e) {
PostLogcatErorrs(e);
}
return itemView;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
// Remove viewpager_item.xml from ViewPager
((ViewPager) container).removeView((FrameLayout) object);
/* android.app.FragmentTransaction ft=fm.beginTransaction();
ft.remove((Fragment) object);
ft.commit(); */
Fragment f = context.getFragmentManager().findFragmentById(R.id.map);
if (f != null)
context.getFragmentManager().beginTransaction().remove(f).commit();
}
private void LoadPlaceDetails() {
try {
// TODO Auto-generated method stub
// Your code goes here
final LatLng fromPosition = new LatLng(
Double.parseDouble(user_latitude),
Double.parseDouble(user_longitude));
final LatLng toPosition = new LatLng(to_latitude,
to_longitude);
gmapdirection = new GMapV2Direction();
FragmentManager fm = ((FragmentActivity) context)
.getSupportFragmentManager();
gmap = ((SupportMapFragment) fm.findFragmentById(R.id.map)).getMap();
gmap.clear();
LatLng coordinates = new LatLng(
(Double.parseDouble(user_latitude) + to_latitude) / 2,
(Double.parseDouble(user_longitude) + to_latitude) / 2);
gmap.animateCamera(CameraUpdateFactory.newLatLngZoom(coordinates, 16));
gmap.addMarker(new MarkerOptions()
.position(fromPosition)
.title("Current Location")
.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_ORANGE)));
gmap.addMarker(new MarkerOptions()
.position(toPosition)
.title("")
.icon(BitmapDescriptorFactory
.defaultMarker(BitmapDescriptorFactory.HUE_VIOLET)));
Document doc = gmapdirection.getDocument(fromPosition, toPosition,
GMapV2Direction.MODE_DRIVING, context);
} catch (NumberFormatException e) {
PostLogcatErorrs(e);
}
}
public static void Newe(Document doc) {
// TODO Auto-generated method stub
ArrayList<LatLng> directionPoint = gmapdirection.getDirection(doc);
PolylineOptions rectLine = new PolylineOptions().width(3).color(
Color.RED);
for (int i = 0; i < directionPoint.size(); i++) {
rectLine.add(directionPoint.get(i));
}
gmap.addPolyline(rectLine);
}
private void GetOfferShopList() {
try {
if(SplashScreen.isOnline)
{
final Location CurrentLocation = new Location("point A");
CurrentLocation.setLatitude(Double.parseDouble(user_latitude));
CurrentLocation.setLongitude(Double.parseDouble(user_longitude));
ListItemsData = new CopyOnWriteArrayList<ListDetails>();
// Creating volley request obj
JsonObjectRequest movieReq = new JsonObjectRequest(LoadActivity.BaseUri + "GetAllOffer?type="+product.getCategoryName(),
null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
//Log.d(TAG, response.toString());
JSONArray GetMG_AppointmentRequestResult = null;
try {
GetMG_AppointmentRequestResult = response.getJSONArray("GetAllOfferResult");
} catch (JSONException e1) {
Toast.makeText(context,
e1.getMessage(), Toast.LENGTH_LONG).show();
e1.printStackTrace();
}
// Parsing json
for (int i = 0; i < GetMG_AppointmentRequestResult.length(); i++) {
try {
JSONObject obj = GetMG_AppointmentRequestResult.getJSONObject(i);
ListDetails ListModelObj = new ListDetails();
Location RetailerLocation = new Location("point B");
RetailerLocation.setLatitude(Double.parseDouble(obj
.getString("Lat")));
RetailerLocation.setLongitude(Double.parseDouble(obj
.getString("Lng")));
float distance = CurrentLocation.distanceTo(RetailerLocation)/1000;
float val = (float)Math.round(distance * 10) / 10;
ListModelObj.setDistance(val);
ListModelObj.setPosition_id(Integer.parseInt(obj.getString("ShopRegID")));
ListModelObj.setShopName(obj.getString("ShopName"));
ListModelObj.setDescription(obj.getString("OfferName"));
ListModelObj.setLat(Double.parseDouble(obj.getString("Lat")));
ListModelObj.setLng(Double.parseDouble(obj.getString("Lng")));
ListModelObj.setDeal(obj.getString("Deal"));
ListModelObj.setPromoCode(obj.getString("PromoCode"));
ListModelObj.setAreaName(obj.getString("AreaName"));
ListModelObj.setOfferStatus(obj.getString("OfferStatus"));
ListModelObj.setCategoryName(obj.getString("CategoryType"));
ListModelObj.setPostedDate(obj
.getString("OfferStartDate"));
ListModelObj.setOfferEndTime(obj
.getString("OfferEndTime"));
ListModelObj.setOfferEndDate(obj
.getString("OfferEndDate"));
ListModelObj.setOfferID(obj
.getString("OfferID"));
ListModelObj.setImageName1(obj.getString("ImageName"));
//ListModelObj.setImageName2(obj.getString("ImageName2"));
//ListModelObj.setImageName3(obj.getString("ImageName3"));
String abc = obj.getString("ImageName");
String[] xyz = abc.split(",");
ListModelObj.setListImage(LoadActivity.BaseUriImg
+ xyz[0]);
ListItemsData.add(ListModelObj);
/*offertable Offers = null;
Repo repoObject = LoadActivity.getRepo();
Offers = new offertable();
Offers.setOfferID(Integer.parseInt(obj.getString("OfferID")));
Offers.setShopRegID(Integer.parseInt(obj.getString("ShopRegID")));
Offers.setShopName(obj.getString("ShopName"));
Offers.setTime(obj.getString("Time"));
Offers.setCreatedDate(obj.getString("CreatedDate"));
Offers.setModifyDate(obj.getString("ModifyDate"));
Offers.setOfferStartDate(obj.getString("OfferStartDate"));
Offers.setOfferEndDate(obj.getString("OfferEndDate"));
Offers.setOfferStartTime(obj.getString("OfferStartTime"));
Offers.setOfferEndTime(obj.getString("OfferEndTime"));
Offers.setDeal(obj.getString("Deal"));
Offers.setDescription(obj.getString("Description"));
Offers.setPromoCode(obj.getString("PromoCode"));
Offers.setImageName(obj.getString("ImageName"));
Offers.setOfferStatus(Integer.parseInt(obj.getString("OfferStatus")));
Offers.setRowStatus("A");
Offers.setAreaName(obj.getString("AreaName"));
Offers.setLat(obj.getString("Lat"));
Offers.setLng(obj.getString("Lng"));
Offers.setCategoryType(obj.getString("CategoryType"));
Offers.setDistance(String.valueOf(val));
//Offers.setTimeTaking(distance1);
repoObject.roffertable.save(Offers);*/
} catch (JSONException e) {
Toast.makeText(context,
e.getMessage(), Toast.LENGTH_LONG).show();
e.printStackTrace();
}
}
// notifying list adapter about data changes
// so that it renders the list view with updated data
CustomGridAdapter customAdapter =new CustomGridAdapter(context,ListItemsData);
swipelisview.setAdapter(customAdapter);
customAdapter.notifyDataSetChanged();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
//VolleyLog.d(TAG, "Error: " + error.getMessage());
}
});
AppController.getInstance().addToRequestQueue(movieReq);
}
else {
repoObject = LoadActivity.getRepo();
List<offertable> alloffers = repoObject.roffertable.getAlloffersByFilter(product.getCategoryName());
ListItemsData = new CopyOnWriteArrayList<ListDetails>();
if (alloffers != null) {
for (offertable s : alloffers) {
final ListDetails ListModelObj = new ListDetails();
ListModelObj.setTime(s.getTimeTaking());
ListModelObj.setDistance(Float.parseFloat(s.getDistance()));
ListModelObj.setPosition_id(s.getShopRegID());
ListModelObj.setShopName(s.getShopName());
ListModelObj.setDescription(s.getDescription());
ListModelObj.setLat(Double.parseDouble(s.getLat()));
ListModelObj.setLng(Double.parseDouble(s.getLng()));
ListModelObj.setDeal(s.getDeal());
ListModelObj.setPromoCode(s.getPromoCode());
ListModelObj.setAreaName(s.getAreaName());
ListModelObj.setPostedDate(s.getOfferStartDate());
ListModelObj.setOfferEndTime(s.getOfferEndTime());
ListModelObj.setOfferEndDate(s.getOfferEndDate());
ListModelObj.setShopID(String.valueOf(s.getShopRegID()));
ListModelObj.setOfferStatus(String.valueOf(s.getOfferStatus()));
ListModelObj.setCategoryName(s.getCategoryType());
ListModelObj.setOfferID(String.valueOf(s.getOfferID()));
ListModelObj.setImageName1(s.getImageName());
String abc = s.getImageName();
String[] xyz = abc.split(",");
ListModelObj
.setListImage(LoadActivity.BaseUriImg + xyz[0]);
ListItemsData.add(ListModelObj);
}
CustomGridAdapter customAdapter =new CustomGridAdapter(context,ListItemsData);
swipelisview.setAdapter(customAdapter);
customAdapter.notifyDataSetChanged();
//progresdialog.dismiss();
}
}
} catch (Exception e1) {
Toast.makeText(context,
e1.getMessage(), Toast.LENGTH_LONG).show();
e1.printStackTrace();
//java.lang.NullPointerException: Attempt to invoke virtual method
//'void customlistviewvolley.AppController.addToRequestQueue(com.android.volley.Request)'
//on a null object reference
}
}
}
答案 0 :(得分：1)
您的布局代码是什么样的？
当我在布局中实例化Fragment然后在onCreate()方法