CrimeListFragment

CrimeListFragment.java

package com.example.ashish.ci;    import android.content.Intent;  import android.os.Bundle;  import android.support.v4.app.Fragment;  import android.support.v7.widget.LinearLayoutManager;  import android.support.v7.widget.RecyclerView;  import android.view.LayoutInflater;  import android.view.View;  import android.view.ViewGroup;  import android.widget.CheckBox;  import android.widget.TextView;  import android.widget.Toast;    import java.util.List;    /**   * Created by Ashish on 9/20/15.   */  public class CrimeListFragment extends Fragment {        private RecyclerView mCrimeRecyclerView;      private CrimeAdapter mAdapter;        @Override      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()));          updateUI();          return view;      }          @Override      public void onResume() {          super.onResume();          updateUI();      }        private class CrimeHolder extends RecyclerView.ViewHolder implements View.OnClickListener {          private TextView mTitleTextView;          private TextView mDateTextView;          private CheckBox mSolvedCheckBox;            private Crime mCrime;            public CrimeHolder(View itemView){              super(itemView);              itemView.setOnClickListener(this);              mTitleTextView = (TextView) itemView.findViewById(R.id.list_item_crime_title_text_view);              mDateTextView = (TextView) itemView.findViewById(R.id.list_item_crime_date_text_view);              mSolvedCheckBox = (CheckBox) itemView.findViewById(R.id.list_item_crime_solved_checkbox);          }            public void bindCrime(Crime crime){              mCrime = crime;              mTitleTextView.setText(mCrime.getTitle());              mDateTextView.setText(mCrime.getDate().toString());              mSolvedCheckBox.setChecked(mCrime.isSolved());          }            @Override          public void onClick(View v){              // Intent intent = CrimeActivity.newIntent(getActivity(), mCrime.getId());              Intent intent = CrimePagerActivity.newIntent(getActivity(), mCrime.getId());              startActivity(intent);          }        }        // has the array of crimes. from this array, binds data to views in viewholders.      private class CrimeAdapter extends RecyclerView.Adapter<CrimeHolder>{          private List<Crime> mCrimes;            public CrimeAdapter(List<Crime> crimes){              mCrimes = crimes;          }            // we are not coding the calling of this. it will be called by mCrimeRecyclerView          @Override          public int getItemCount(){              return mCrimes.size();          }            // we are not coding the calling of this. it will be called by mCrimeRecyclerView          @Override          public CrimeHolder onCreateViewHolder(ViewGroup parent, int viewType){              LayoutInflater layoutInflater = LayoutInflater.from(getActivity()); // obtains LayoutInflater from the context              View view = layoutInflater.inflate(R.layout.list_item_crime, parent, false);              return new CrimeHolder(view); // at this moment, we create a view and wrap it in a ViewHolder                                            // the view is not hooked up with any data as of now          }            // we are not coding the calling of this. it will be called by mCrimeRecyclerView          @Override          public void onBindViewHolder(CrimeHolder holder, int position){              Crime crime = mCrimes.get(position);              holder.bindCrime(crime);          }        }        private void updateUI(){          CrimeLab crimeLab = CrimeLab.get(getActivity());  // we will know later why Context is a param in get()          List<Crime> crimes = crimeLab.getCrimes();            if (mAdapter == null) {              mAdapter = new CrimeAdapter(crimes);              mCrimeRecyclerView.setAdapter(mAdapter);          } else {              mAdapter.notifyDataSetChanged();          }      }      }