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Android初学第24天

androidIT知识Android初学

贵有恒，何必三更起、五更眠、最无益，只怕一日曝、十日寒。这篇文章主要讲述Android初学第24天相关的知识，希望能为你提供帮助。
android初学第24天【Android初学第24天】10_FragmentArguments
代码 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(); } } }


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