onClick() crashes program “bignerdranch” “criminalintent” project

i am new to android programming but i have some prior java experience. i am working on a project from the big nerd ranch guide to android programming. because i lack experience with android i am pretty much copying the code while i learn and not trying to get creative with it. however i have reached a point in the criminal intent application where my the app crashes every time i click an item in my RecyclerView.

I have searched the web and found other problems kind of like this one but they aren’t helping me figure this out. as i have said i am new to android and extras, intents and all that. can anyone help me identify the cause of this and how to fix it? i am posting some of my code as well as the Exceptions stack trace. this is the list fragment that contains the recycler view:

package com.bignerdranch.android.criminalintent;

import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.NavUtils;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.view.menu.ExpandedMenuView;
import android.support.v7.widget.LinearLayoutManager;
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.TextView;
import android.widget.Toast;

import java.util.IllegalFormatCodePointException;
import java.util.List;

public class CrimeListFragment extends Fragment{
private RecyclerView mCrimeRecyclerView;
private CrimeAdapter mAdapter;

public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState){
View view = inflater.inflate(R.layout.fragment_crime_list, container, false);

mCrimeRecyclerView = (RecyclerView) view.findViewById(R.id.crime_recycler_view);
mCrimeRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));


return view;

}//end onCreate

private void updateUI(){
CrimeLab crimeLab = CrimeLab.get(getActivity());
List crimes = crimeLab.getCrimes();

if (mAdapter == null){
    mAdapter = new CrimeAdapter(crimes);
}else {

}//end updateUI()

private class CrimeHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
private TextView mTitleTextView;
private TextView mDateTextView;
private Crime mCrime;
private ImageView mSolvedImageView;

public CrimeHolder(LayoutInflater inflater, ViewGroup parent){
    super(inflater.inflate(R.layout.list_item_crime, parent, false));

    mTitleTextView = (TextView) itemView.findViewById(R.id.crime_title);
    mDateTextView = (TextView) itemView.findViewById(R.id.crime_date);
    mSolvedImageView = (ImageView) itemView.findViewById(R.id.crime_solved);
}//end constructor

public void onClick(View view){
    try {
        Intent intent = CrimePagerActivity.newIntent(getActivity(), mCrime.getId());
        startActivity(intent); // something wrong with the activity starting when clicked!
    }catch(Exception e){
            Log.d("ONCLICK", e.toString());
}//end onCLick()

public void bind(Crime crime){
    mCrime = crime;
    mSolvedImageView.setVisibility(crime.isSolved() ? View.VISIBLE : View.GONE);
}//end bind()

}//end CrimeHolder inner Class

private class CrimeAdapter extends RecyclerView.Adapter{

private List<Crime> mCrimes;

public CrimeAdapter(List<Crime> crimes){
    mCrimes = crimes;
}//end constructor
public CrimeHolder onCreateViewHolder(ViewGroup parent, int viewType){
    LayoutInflater layoutInflater = LayoutInflater.from(getActivity());

    return new CrimeHolder(layoutInflater, parent);

}// end onCreateViewHolder

public void onBindViewHolder(CrimeHolder holder, int position){
    Crime crime = mCrimes.get(position);

public int getItemCount(){
    return mCrimes.size();

}//end CrimeAdapter inner Class

}//end CrimeListFragment class

and here is the class for the activity that is supposed to be launched on click:

package com.bignerdranch.android.criminalintent;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentStatePagerAdapter;
import android.support.v4.view.ViewPager;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.view.ViewPropertyAnimatorCompatSet;
import java.util.List;
import java.util.UUID;

public class CrimePagerActivity extends AppCompatActivity {

private static final String EXTRA_CRIME_ID = "com.bignerdranch.android.criminalintent.crime_id";

private ViewPager mViewPager;
private List<Crime> mCrimes;

public static Intent newIntent(Context packageContext, UUID crimeId){
    Intent intent = new Intent(packageContext, CrimePagerActivity.class);
    intent.putExtra(EXTRA_CRIME_ID, crimeId);
    return intent;

protected void onCreate(Bundle savedInstanceState){

    UUID crimeId = (UUID) getIntent().getSerializableExtra(EXTRA_CRIME_ID);

    mViewPager = (ViewPager) findViewById(R.id.crime_view_pager);
    mCrimes = CrimeLab.get(this).getCrimes();

    FragmentManager fragmentManager = getSupportFragmentManager();
    mViewPager.setAdapter(new FragmentStatePagerAdapter(fragmentManager) {
        public Fragment getItem(int position) {
            Crime crime = mCrimes.get(position);
            return CrimeFragment.newInstance(crime.getId());

        public int getCount() {
            return mCrimes.size();
}// end onCreate()

}//end crimePagerAtivity class

and here is the code for the CrimeLab class:

package com.bignerdranch.android.criminalintent;

import android.content.Context;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

public class CrimeLab {
private static CrimeLab sCrimeLab;
private List<Crime> mCrimes;

public static CrimeLab get(Context context){
    if(sCrimeLab == null){
        sCrimeLab = new CrimeLab(context);

    return sCrimeLab;
}//end get()

private CrimeLab(Context context){

}//end constructor

public List<Crime> getCrimes(){
    mCrimes = new ArrayList<>();
    for (int i = 0; i < 100; i++){
        Crime crime = new Crime();
        crime.setTitle("Crime #" + i);
        crime.setSolved(i % 2 == 0); //every other crime will be checked!
    return mCrimes;
}//end getCrimes

public Crime getCrime(UUID id){
    for (Crime crime : mCrimes){
        if (crime.getId().equals(id)){
            return crime;
 return null;
}//end getCrime()

}//end CrimeLab class

and here is my Exeptions stack trace that is logged from my try/catch block in CrimeHolders onClick():

Anyone found anything.

Set break points and log.d(…) and trace where it crashes