Android初学第20天
09_LayoutsAndWidgets
代码
CrimeListFragment.java
package com.bignerdranch.android.criminalintent; 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.ImageView; import android.widget.TextView; import android.widget.Toast; import java.util.List; 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; } private void updateUI() { CrimeLab crimeLab = CrimeLab.get(getActivity()); List<Crime> crimes = crimeLab.getCrimes(); mAdapter = new CrimeAdapter(crimes); mCrimeRecyclerView.setAdapter(mAdapter); } private class CrimeHolder extends RecyclerView.ViewHolder implements View.OnClickListener { private Crime mCrime; private TextView mTitleTextView; private TextView mDateTextView; private ImageView mSolvedImageView; public CrimeHolder(LayoutInflater inflater, ViewGroup parent) { super(inflater.inflate(R.layout.list_item_crime, parent, false)); itemView.setOnClickListener(this); mTitleTextView = (TextView) itemView.findViewById(R.id.crime_title); mDateTextView = (TextView) itemView.findViewById(R.id.crime_date); mSolvedImageView = (ImageView) itemView.findViewById(R.id.crime_solved); } public void bind(Crime crime) { mCrime = crime; mTitleTextView.setText(mCrime.getTitle()); mDateTextView.setText(mCrime.getDate().toString()); mSolvedImageView.setVisibility(crime.isSolved() ? View.VISIBLE : View.GONE); } @Override public void onClick(View view) { Toast.makeText(getActivity(), mCrime.getTitle() + " clicked!", Toast.LENGTH_SHORT) .show(); } } private class CrimeAdapter extends RecyclerView.Adapter<CrimeHolder> { private List<Crime> mCrimes; public CrimeAdapter(List<Crime> crimes) { mCrimes = crimes; } @Override public CrimeHolder onCreateViewHolder(ViewGroup parent, int viewType) { LayoutInflater layoutInflater = LayoutInflater.from(getActivity()); return new CrimeHolder(layoutInflater, parent); } @Override public void onBindViewHolder(CrimeHolder holder, int position) { Crime crime = mCrimes.get(position); holder.bind(crime); } @Override public int getItemCount() { return mCrimes.size(); } } }
来源:https://www.cnblogs.com/zhouheng0918/p/9140782.html