Java tutorial
/* * Copyright (C) 2015 The Android Open Source Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package ch.ccapps.android.zeneggen.fragment; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.os.Parcelable; import android.support.annotation.NonNull; 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.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ImageView; import android.widget.TextView; import com.bumptech.glide.Glide; import java.util.ArrayList; import java.util.HashMap; import java.util.List; import java.util.Random; import ch.ccapps.android.zeneggen.R; import ch.ccapps.android.zeneggen.activity.tourismus.HotelDetailActivity; import ch.ccapps.android.zeneggen.adapter.DividerItemDecoration; import ch.ccapps.android.zeneggen.adapter.SectionRecyclerAdapter; import ch.ccapps.android.zeneggen.adapter.holder.ViewHolder; import ch.ccapps.android.zeneggen.model.Hotel; public class TabSectionListFragment<T> extends Fragment implements SectionRecyclerAdapter.ViewHolderCreator, SectionRecyclerAdapter.SectionAdapterClickListener<T> { @Nullable private HashMap<String, List<T>> itemMap; private int fragmentListLayoutId; private String hotelType; private TabSectionListInterface<T> tabSecInterface; private static final String LIST_LAYOUT_KEY = "LIST_LAYOUT_ID"; private static final String HOTEL_TYPE_KEY = "HOTEL_TYPE"; public interface CustomSectionListInterface<T> { @NonNull public TabSectionListInterface<T> getTabSectionListInterface(); } @NonNull public static TabSectionListFragment newInstance(String hotelType, int fragmentListLayout) { TabSectionListFragment fragment = new TabSectionListFragment(); Bundle b = new Bundle(); b.putString(HOTEL_TYPE_KEY, hotelType); b.putInt(LIST_LAYOUT_KEY, fragmentListLayout); fragment.setArguments(b); return fragment; } @Override public void onAttach(Activity activity) { super.onAttach(activity); Log.i("TabSectionListFragment", "- OnAttach -"); try { tabSecInterface = ((CustomSectionListInterface<T>) activity).getTabSectionListInterface(); Log.i("TabSectionListFragment", " item Map is:" + itemMap); } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " You must implement CustomSectionListInterface"); } } @Override public void onDetach() { super.onDetach(); this.tabSecInterface = null; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Log.i("TabSectionListFragment", "- OnCreate -"); if (getArguments() != null) { this.hotelType = getArguments().getString(HOTEL_TYPE_KEY); fragmentListLayoutId = getArguments().getInt(LIST_LAYOUT_KEY); itemMap = tabSecInterface.fillWithItemMap(hotelType); } } @Nullable @Override public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { RecyclerView rv = (RecyclerView) inflater.inflate(fragmentListLayoutId, container, false); Log.i("TabSectionListFragment", "- OnCreateView -"); setupRecyclerView(rv); return rv; } private void setupRecyclerView(@NonNull RecyclerView recyclerView) { recyclerView.setLayoutManager(new LinearLayoutManager(recyclerView.getContext())); List<String> sections = new ArrayList<String>(); for (String section : itemMap.keySet()) { if (section != null && section.equals("Zeneggen")) { sections.add(0, section); } else { sections.add(section); } } SectionRecyclerAdapter<T> hotelRecAdapter = new SectionRecyclerAdapter<>(itemMap, sections, this, this); recyclerView.setAdapter(hotelRecAdapter); recyclerView.addItemDecoration(new DividerItemDecoration(TabSectionListFragment.this.getActivity(), null)); } public void updateData() { } @NonNull private List<String> getRandomSublist(@NonNull String[] array, int amount) { ArrayList<String> list = new ArrayList<>(amount); Random random = new Random(); while (list.size() < amount) { list.add(array[random.nextInt(array.length)]); } return list; } @Nullable @Override public ViewHolder createViewHolderFor(@NonNull ViewGroup parent, int type) { if (type == SectionRecyclerAdapter.DATA_TYPE) { return tabSecInterface.createViewHolderForData(parent); /*View view = LayoutInflater.from(parent.getContext()) .inflate(R.layout.list_item, parent, false);*/ //view.setBackgroundResource(mBackground); //return new HotelRestViewHolder(view); } else if (type == SectionRecyclerAdapter.SECTION_TYPE) { return tabSecInterface.createViewHolderForSection(parent); /*View view = LayoutInflater.from(parent.getContext()) .inflate(R.layout.list_section_header_item, parent, false); return new SectionViewHolder(view);*/ } else { return null; } } @Override public void onSectionClicked(String section) { } @Override public void onItemInSecRecViewClicked(T dataobject) { tabSecInterface.onItemInSecRecViewClicked(dataobject); } public interface TabSectionListInterface<R> { public ViewHolder createViewHolderForSection(@NonNull ViewGroup parent); public ViewHolder<R> createViewHolderForData(@NonNull ViewGroup parent); public void onItemInSecRecViewClicked(R dataobject); public HashMap<String, List<R>> fillWithItemMap(String hoteltype); } }