Adapter issuses

public class ProfileDefaultFragment extends Fragment{
public final String TAG = "ProfileDefaultFragment";
StudentProfileActivity activity;
Student student;
OverallData overallData;
List examResultData;
StudentProgressStatus studentProgress;
PieChart overAllPerChart;
TextView toNoDaysCnt;
TextView overallPrcnCnt;
ListView examlist;
ProfileExamResultAdapter profileExamResultAdapter;
ProfileChartsFragment profileChartsFragment;
BootstrapApplication bootstrapApplication = BootstrapApplication.getInstance();
private OnFragmentInteractionListener mListener;

public ProfileDefaultFragment() {
    // Required empty public constructor
}

public void setStudent(Student studata){
    student = studata;
}


public static ProfileDefaultFragment newInstance(String param1, String param2) {
    ProfileDefaultFragment fragment = new ProfileDefaultFragment();
    Bundle args = new Bundle();
    fragment.setArguments(args);
    return fragment;
}

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    profileChartsFragment = new ProfileChartsFragment();

}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {

    Intent studen_profile_defalt = getActivity().getIntent();
    studentProgress = (StudentProgressStatus) studen_profile_defalt.getSerializableExtra("studentProgress");
    View view = inflater.inflate(R.layout.fragment_profile_default, container, false);
    toNoDaysCnt = (TextView) view.findViewById(R.id.txtNoofDaysCnt);
    overallPrcnCnt = (TextView) view.findViewById(R.id.txtOverallPcntg);
    overAllPerChart = (PieChart) view.findViewById(R.id.chartVariance);
    overAllPerChart.setUsePercentValues(true);
    //Setting Listview
    examlist = (ListView) view.findViewById(R.id.list);
    examlist.setAdapter();

    Button btnMore = (Button) view.findViewById(R.id.btnMore);

    btnMore.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            //getActivity().getIntent().putExtra("studentProgress",studentProgress);
            android.support.v4.app.FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
            android.support.v4.app.FragmentTransaction transaction = fragmentManager.beginTransaction();
            transaction.replace(R.id.container, profileChartsFragment); // fragmen container id in first parameter is the  container(Main layout id) of Activity
            //transaction.addToBackStack("ProfileDefaultFragment");  // this will manage backstack
            transaction.commit();
        }
    });

    //examlist.setAdapter(profileExamResultAdapter);
    return view;
}

public void onStart() {
    super.onStart();
    activity.setstudentProgress(studentProgress);

}

@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
this.activity = (StudentProfileActivity) activity;
setExamResults();
setOverallDataPnt();
try {
mListener = (ProfileDefaultFragment.OnFragmentInteractionListener) activity;
} catch (ClassCastException e) {
throw new ClassCastException(activity.toString()
+ " must implement OnFragmentInteractionListener");
}
}

public String getPostQuery(){
    String AcYr = "";
    String PrID = "";
    String CrID = "";
    String DeptID = "";
    String SemID = "";
    String SecID = "";
    String InId = "";
    if ( studentProgress != null ) {
        Log.d(TAG,"inside student progresssssssssss");
        AcYr = studentProgress.getAcYr();
        PrID = studentProgress.getPrID();
        CrID = studentProgress.getCrID();
        DeptID = studentProgress.getDepID();
        SemID = studentProgress.getSemID();
        SecID = studentProgress.getSecID();
    }

    return String.format
            ("{\"%s\":\"%s\"," +
                            "\"%s\":\"%s\"," +
                            "\"%s\":\"%s\"," +
                            "\"%s\":\"%s\"," +
                            "\"%s\":\"%s\"," +
                            "\"%s\":\"%s\"," +
                            "\"%s\":\"%s\"," +
                            "\"%s\":\"%s\"}",
                    "AcYr", AcYr,
                    "StuID", student.get_id(),
                    "PrID", PrID,
                    "CrID", CrID,
                    "DeptID", DeptID,
                    "SemID", SemID,
                    "SecID", SecID,
                    "InId", bootstrapApplication.getLogin().getInId()
            );
}

public void setExamResults(){
    new AsyncTask<Void, Void, ExamResultDataWrapper>(){
        @Override
        protected ExamResultDataWrapper doInBackground(Void... voids) {
            HttpRequest request = post(bootstrapApplication.getURL_EXAMRESULT_STUDENT())
                    .contentType("application/json")
                    .header(HEADER_TOKEN_KEY,HEADER_TOKEN)
                    .send(getPostQuery());
            String output = Strings.toString(request.buffer());
            Log.d(TAG,output );
            ExamResultDataWrapper response = null;
            if(request.ok()) {
                Gson gson = new GsonBuilder().create();
                response = gson.fromJson(output, ExamResultDataWrapper.class);
            }
            return response;
        }

        @Override
        protected void onPostExecute(ExamResultDataWrapper response) {
            super.onPostExecute(response);
            if( response!=null && response.getOutput()!= null) {
                examResultData =  response.getOutput().getData();
            }
        }
    }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
}

public void setOverallDataPnt(){
    new AsyncTask<Void, Void, OverallDataWrapper>(){
        @Override
        protected OverallDataWrapper doInBackground(Void... voids) {
            if (NetworkUtil.isInternetAvailable()) {
                try {
                    HttpRequest request = post(bootstrapApplication.getURL_GET_ATTENDANCELOG())
                            .contentType("application/json")
                            .header(HEADER_TOKEN_KEY, HEADER_TOKEN)
                            .send(getPostQuery());
                    String output = Strings.toString(request.buffer());
                    OverallDataWrapper response = null;
                    if (request.ok()) {
                        Gson gson = new GsonBuilder().create();
                        response = gson.fromJson(output, OverallDataWrapper.class);
                    }
                    return response;
                }catch (Exception e){
                    e.printStackTrace();
                }
            }else {
                NetworkUtil.showNetworkNotAvailable(getActivity());
            }
            return null;
        }

        @Override
        protected void onPostExecute(OverallDataWrapper response) {
            super.onPostExecute(response);
            if( response!=null && response.getOutput().getData()!=null) {
                overallData = response.getOutput().getData();
                if (overallData.getOverallPrctg()!=null){
                    overallPrcnCnt.setText(overallData.getOverallPrctg()+ " %");
                }else {
                    overallPrcnCnt.setText("-");
                }
                if (overallData.getTotalDayCnt()!= null && overallData.getTotalPntCnt() != null){
                    toNoDaysCnt.setText(overallData.getTotalPntCnt()+"/"+overallData.getTotalDayCnt());
                }else if(overallData.getTotalDayCnt()!= null){
                    toNoDaysCnt.setText("-"+"/"+overallData.getTotalDayCnt());
                }else
                    toNoDaysCnt.setText("-"+"/"+"-");
                showChart();
            }

        }
    }.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
}

@Override
public void onDetach() {
    super.onDetach();
    mListener = null;
}

public interface OnFragmentInteractionListener {
    void onFragmentInteraction(Uri uri);
}

}

above is my code if i try to set adapter it shows error i cant find the error