Android初學第24天

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Android初學第24天

10_FragmentArguments

代碼CrimeListFragment.java

package com.bignerdranch.android.criminalintent;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.ImageView;import android.widget.TextView;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;    }    @Override    public void onResume() {        super.onResume();        updateUI();    }    private void updateUI() {        CrimeLab crimeLab = CrimeLab.get(getActivity());        List<Crime> crimes = crimeLab.getCrimes();        if (mAdapter == null) {            mAdapter = new CrimeAdapter(crimes);            mCrimeRecyclerView.setAdapter(mAdapter);        } else {            mAdapter.notifyDataSetChanged();        }    }    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) {            Intent intent = CrimeActivity.newIntent(getActivity(), mCrime.getId());            startActivity(intent);        }    }    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();        }    }}

Android初學第24天