1
私はWebサービスへのいくつかのデータを渡していますが、これらのエラーながら
これをresloveする方法これら
java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference
at info.sherpify.pavithracs.sherpifys.adapter.RecyclerViewAdapterSearch.getItemCount(RecyclerViewAdapterSearch.java:85)
のように、アダプタの内側にNullPointerExceptionが表示されます私のアダプタクラス
package info.sherpify.pavithracs.sherpifys.adapter;
import android.support.v7.widget.RecyclerView;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.RelativeLayout;
import android.widget.TextView;
import com.squareup.picasso.Picasso;
import java.util.List;
import info.sherpify.pavithracs.sherpifys.R;
import info.sherpify.pavithracs.sherpifys.model.Categorieslist;
public class RecyclerViewAdapterSearch extends RecyclerView.Adapter<RecyclerViewAdapterSearch.ViewHolder> {
private List<Categorieslist> items;
private OnItemClickListener onItemClickListener;
public RecyclerViewAdapterSearch(List<Categorieslist> items) {
this.items = items;
}
public void setOnItemClickListener(OnItemClickListener onItemClickListener) {
this.onItemClickListener = onItemClickListener;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_list_home_search, parent, false);
return new ViewHolder(v);
}
@Override
public void onBindViewHolder(ViewHolder holder, final int position) {
Categorieslist item = items.get(position);
try {
holder.textmentordesignation.setText(item.getFieldUserDesig());
holder.textyearofexperience.setText(item.getFieldUserExp()+" Years");
holder.textmentorname.setText(item.getFieldUserName());
holder.textcurrentcompany.setText("Current:"+item.getFieldUserCurrentCompany());
holder.textpreviouscompany.setText("Previous:"+item.getFieldUserPreviousCompany());
Log.i("Field--",""+item.getFieldUserDesig());
Log.i("Field--",""+item.getFieldUserName());
Log.i("Field--",""+item.getFieldUserExp());
// holder.image.setImageBitmap(null);
//Picasso.with(holder.image.getContext()).load(item.getCatLargeLogo()).into(holder.image);
holder.itemView.setTag(item);
holder.relativementor.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onItemClickListener.onItemClick(v,items.get(position).getFieldUserId(),items.get(position).getFieldUserName(),items.get(position).getFieldUserDesig(),items.get(position).getFieldUserSummary());
}
});
} catch (Exception e) {
e.printStackTrace();
}
}
@Override
public int getItemCount() {
return items.size();
}
protected static class ViewHolder extends RecyclerView.ViewHolder {
public TextView textmentordesignation,textyearofexperience,textmentorname,textcurrentcompany,textpreviouscompany;
public ImageView image;
RelativeLayout relativementor;
public ViewHolder(View itemView) {
super(itemView);
image = (ImageView) itemView.findViewById(R.id.image);
textmentordesignation = (TextView) itemView.findViewById(R.id.textmentordesignation);
textyearofexperience = (TextView) itemView.findViewById(R.id.textyearsofexperience);
textmentorname = (TextView) itemView.findViewById(R.id.textmentorname);
textcurrentcompany = (TextView) itemView.findViewById(R.id.textcurrentcompany);
textpreviouscompany = (TextView) itemView.findViewById(R.id.textpreviouscompany);
relativementor = (RelativeLayout) itemView.findViewById(R.id.relativementor);
}
}
public interface OnItemClickListener {
void onItemClick(View view, String viewModel, String cName, String uId, String catId);
}
}
これは私の再です私はデータ
public List<Categorieslist> forHomeCategoryListALL(final Context cntxt, final String companyId,final String skillsId,final String industryId,final String mentor) { mResponseFromServerInterface.showProgressBar(); final String homeurl = NetworkUtils.GET_HOME_CATEGORIES_MENTOR_FILTERING; final RequestQueue requestQueue = VolleySingleton.getInstance().getRequestQueue(); System.out.println("Skills id request:" + skillsId); System.out.println("Industry id:" + industryId); System.out.println("Company Id :" + companyId); System.out.println("Mentor Id :" + mentor); StringRequest requestLogin = new StringRequest(Request.Method.POST, homeurl, new Response.Listener<String>() { @Override public void onResponse(final String response) { Log.i("Response Mentors-->",""+response); Log.i("Home URL-->",""+homeurl); try { Type listType = new TypeToken<List<Categorieslist>>() { }.getType(); mResponseFromServerInterface.hideProgressBar(); HomeScreenInstance.getSherpaInstance().homeCategoryMentorlist = (List<Categorieslist>) new Gson().fromJson(response.toString(), listType); mResponseFromServerInterface.ResponseSuccess("Response Sucessfull"); } catch (NullPointerException e) { e.printStackTrace(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { mResponseFromServerInterface.hideProgressBar(); mResponseFromServerInterface.ResponseFailure("" + error.toString()); Log.i("Exception",""+error.toString()); error.printStackTrace(); } }) { @Override protected Map<String, String> getParams() { Map<String, String> params = new HashMap<String, String>(); params.put(Constants.MENTOR_ID, mentor); params.put(Constants.COMPANY_ID, companyId); params.put(Constants.SKILLS_ID, skillsId); params.put(Constants.INDUSTRY_ID, industryId); Log.i("Params",""+params); return params; } }; requestQueue.add(requestLogin); return HomeScreenInstance.getSherpaInstance().homeCategoryMentorlist; } この
を渡していquestserverクラスは、私がI/Designation Id ::
I/SkillId after--: null
I/IndustryId--: null
I/CompanyId--: null
I/Mentor Id :: srini
I/Designation Id :: null
I/Params: {name= srini, skillsId=null, companyId=null, industryId=null}
I/Response Mentors-->: null
I/Home URL-->: http://192.168.10.6/sherpify/mentorsfiltering.php
I/ResponseSuccess(): Response Sucessfull
E/AndroidRuntime: FATAL EXCEPTION: main
Process: info.sherpify.pavithracs.sherpifys, PID: 12090
java.lang.NullPointerException: Attempt to invoke interface method 'int java.util.List.size()' on a null object reference
at info.sherpify.pavithracs.sherpifys.adapter.RecyclerViewAdapterSearch.getItemCount(RecyclerViewAdapterSearch.java:85)
at android.support.v7.widget.RecyclerView.dispatchLayoutStep1(RecyclerView.java:3289)
at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3186)
at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3632)
at android.view.View.layout(View.java:15689)
at android.view.ViewGroup.layout(ViewGroup.java:5040)
at android.support.v4.widget.SwipeRefreshLayout.onLayout(SwipeRefreshLayout.java:636)
at android.view.View.layout(View.java:15689)
at android.view.ViewGroup.layout(ViewGroup.java:5040)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15689)
at android.view.ViewGroup.layout(ViewGroup.java:5040)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15689)
at android.view.ViewGroup.layout(ViewGroup.java:5040)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15689)
at android.view.ViewGroup.layout(ViewGroup.java:5040)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15689)
at android.view.ViewGroup.layout(ViewGroup.java:5040)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1703)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1557)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1466)
at android.view.View.layout(View.java:15689)
at android.view.ViewGroup.layout(ViewGroup.java:5040)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:579)
at android.widget.FrameLayout.onLayout(FrameLayout.java:514)
at android.view.View.layout(View.java:15689)
at android.view.ViewGroup.layout(ViewGroup.java:5040)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2116)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1873)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1084)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5990)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767)
at android.view.Choreographer.doCallbacks(Choreographer.java:580)
at android.view.Choreographer.doFrame(Choreographer.java:550)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5343)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:905)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:700)
どの行が 'RecyclerViewAdapterSearch.java：85' ??????? – Gattsu
@Override パブリックint getItemCount（）{ 返品items.size（）; } – pavithra
items.size（）;エラーが表示されます – pavithra