I want to ask the teacher why the onBindViewHolder() method that I automatically generate through Android Studio is different from the one in the book.It gave me an error.Take a look at my screenshot.I try to change it to the same code as the book, but @override turns red.I don’t know what to do?
- Here’s my full code
import android.os.Bundle;
import android.support.annotation.Nullable;
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.TextView;
import java.util.List;
import static android.support.v7.widget.RecyclerView.*;
public class CrimeListFragment extends Fragment {
private RecyclerView mCrimeRecyclerView;
private CrimeAdapter mAdapter;
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment_crime_list, container, false);
mCrimeRecyclerView = (RecyclerView) view.findViewById(R.id.crime_recycle_view);
mCrimeRecyclerView.setLayoutManager(new LinearLayoutManager(getActivity()));
updateUI();
return view;
}
private void updateUI() {
CrimeLab crimeLab = CrimeLab.get(getActivity());
List cirmes = crimeLab.getCrimes();
mAdapter = new CrimeAdapter(cirmes);
mCrimeRecyclerView.setAdapter(mAdapter);
}
private class CrimeHolder extends ViewHolder {
private TextView mTitleTextView;
private TextView mDateTextView;
private Crime mCrime;
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);
}
public void bind(Crime crime) {
mCrime = crime;
mTitleTextView.setText(mCrime.getTitle());
mDateTextView.setText(mCrime.getDate().toString());
}
}
private class CrimeAdapter extends Adapter {
private List mCrimes;
public CrimeAdapter(List crimes) {
mCrimes = crimes;
}
@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
LayoutInflater layoutInflater = LayoutInflater.from(getActivity());
return new CrimeHolder(layoutInflater, parent);
}
@Override
public void onBindViewHolder(ViewHolder holder, int position) {
Crime crime = mCrimes.get(position);
holder.bind(crime);
}
/*
* That's what it says in the book, but it's still wrong for me to copy it.
*
*/
// @Override // red
// public void onBindViewHolder(CrimeHolder holder, int position) {
// Crime crime = mCrimes.get(position);
// holder.bind(crime);
// }
@Override
public int getItemCount() {
return mCrimes.size();
}
}
}