Java tutorial
/* * Copyright 2016 Maurice Kenmeue Fonwe * * 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 dynamite.zafroshops.app.fragment; import android.app.Activity; import android.content.Context; import android.content.SharedPreferences; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.v4.app.Fragment; import android.support.v4.widget.SwipeRefreshLayout; import android.util.Pair; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.RelativeLayout; import com.google.common.base.Predicate; import com.google.common.collect.Collections2; import com.google.common.util.concurrent.FutureCallback; import com.google.common.util.concurrent.Futures; import com.google.common.util.concurrent.ListenableFuture; import com.google.gson.Gson; import com.google.gson.JsonArray; import com.google.gson.JsonElement; import com.google.gson.reflect.TypeToken; import java.io.BufferedReader; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; import java.io.StreamCorruptedException; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import dynamite.zafroshops.app.adapter.TypedZopListViewAdapter; import dynamite.zafroshops.app.MainActivity; import dynamite.zafroshops.app.R; import dynamite.zafroshops.app.data.MobileZop; import dynamite.zafroshops.app.data.StorageKeys; import dynamite.zafroshops.app.data.ZopType; public class TypedZopsFragment extends Fragment { /** * The fragment argument representing the section number for this * fragment. */ private static final String ARG_ZOP_TYPE = "zop_type"; private static final String ARG_FORCE = "force"; private boolean force; private TypedZopListViewAdapter adapter; private int dataVersion; public ArrayList<MobileZop> typedZops; public static ZopType zopType; private SwipeRefreshLayout swipeRefreshLayout; /** * Returns a new instance of this fragment for the given section * number. */ public static TypedZopsFragment newInstance(ZopType type, boolean forceRefresh) { TypedZopsFragment fragment = new TypedZopsFragment(); Bundle args = new Bundle(); args.putSerializable(ARG_ZOP_TYPE, type); args.putBoolean(ARG_FORCE, forceRefresh); fragment.setArguments(args); return fragment; } public TypedZopsFragment() { typedZops = new ArrayList<MobileZop>() { }; } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { final MainActivity activity = (MainActivity) getActivity(); activity.getMenuInflater().inflate(R.menu.menu_typed, menu); activity.restoreActionBar(); // swipe to refresh swipeRefreshLayout = (SwipeRefreshLayout) activity.findViewById(R.id.swipeRefreshLayout); swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { activity.refresh(); swipeRefreshLayout.setRefreshing(false); } }); super.onCreateOptionsMenu(menu, inflater); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setHasOptionsMenu(true); force = getArguments().getBoolean(ARG_FORCE, false); MainActivity activity = (MainActivity) getActivity(); if ((ZopType) getArguments().get(ARG_ZOP_TYPE) != null) { ((MainActivity) getActivity()).Counts.put((ZopType) getArguments().get(ARG_ZOP_TYPE), 0); } if (force) { setZops(true); } else { setZops(false); if (activity.DataVersion != 0 && activity.Versions.get(zopType) != null && activity.Versions.get(zopType) < activity.DataVersion) { setZops(true); } } } private void setZops(final boolean force) { Activity activity = getActivity(); adapter = new TypedZopListViewAdapter(getActivity(), R.id.listViewItem, typedZops); final SharedPreferences preferences = activity.getPreferences(0); final SharedPreferences.Editor editor = preferences.edit(); final ZopType type = (ZopType) getArguments().get(ARG_ZOP_TYPE); final String key = StorageKeys.ZOPS_KEY + type.toString(); zopType = type; if (!preferences.contains(key)) { InputStream is = getResources().openRawResource(R.raw.zops); BufferedReader reader = new BufferedReader(new InputStreamReader(is)); typedZops = new ArrayList<>(Collections2.filter( (ArrayList<MobileZop>) new Gson().fromJson(reader, new TypeToken<ArrayList<MobileZop>>() { }.getType()), new Predicate<MobileZop>() { @Override public boolean apply(MobileZop input) { return input.Type == type && (!preferences.contains(StorageKeys.COUNTRY_KEY) || preferences.getString(StorageKeys.COUNTRY_KEY, "").equals("") || input.CountryID.equals(preferences.getString(StorageKeys.COUNTRY_KEY, ""))); } })); try { FileOutputStream fos = activity.openFileOutput(key, Context.MODE_PRIVATE); ObjectOutputStream oos = new ObjectOutputStream(fos); int count = typedZops.size(); oos.writeObject(typedZops); oos.close(); fos.close(); editor.putString(key, Integer.toString(count)); editor.commit(); setCount(count); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } else if (preferences.contains(key)) { try { FileInputStream fis = activity.openFileInput(key); ObjectInputStream ois = new ObjectInputStream(fis); ArrayList<MobileZop> temp = (ArrayList) ois.readObject(); typedZops = new ArrayList<>(Collections2.filter(temp, new Predicate<MobileZop>() { @Override public boolean apply(MobileZop input) { return input.Type == type && (!preferences.contains(StorageKeys.COUNTRY_KEY) || preferences.getString(StorageKeys.COUNTRY_KEY, "").equals("") || input.CountryID.equals(preferences.getString(StorageKeys.COUNTRY_KEY, ""))); } })); ois.close(); fis.close(); setCount(typedZops.size()); if (adapter != null) { adapter.setObjects(typedZops); adapter.notifyDataSetChanged(); } } catch (FileNotFoundException e) { e.printStackTrace(); } catch (StreamCorruptedException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } catch (ClassNotFoundException e) { e.printStackTrace(); } } if (force) { final ArrayList<Pair<String, String>> parameters; if (MainActivity.LastLocation != null) { parameters = new ArrayList<Pair<String, String>>() { { add(new Pair<>("latitude", Double.toString(MainActivity.LastLocation.Latitude))); add(new Pair<>("longitude", Double.toString(MainActivity.LastLocation.Longitude))); add(new Pair<>("type", type.getText())); } }; } else { parameters = new ArrayList<Pair<String, String>>() { { add(new Pair<>("type", type.getText())); } }; } ListenableFuture<JsonElement> result = MainActivity.MobileClient.invokeApi("mobileZop", "GET", parameters); Futures.addCallback(result, new FutureCallback<JsonElement>() { Activity activity = getActivity(); @Override public void onSuccess(JsonElement result) { JsonArray typesAsJson = result.getAsJsonArray(); if (typesAsJson != null) { ArrayList<MobileZop> temp = new Gson().fromJson(result, new TypeToken<ArrayList<MobileZop>>() { }.getType()); int max = Collections.max(temp, new Comparator<MobileZop>() { @Override public int compare(MobileZop lhs, MobileZop rhs) { if (lhs.DataVersion < rhs.DataVersion) { return -1; } else if (lhs.DataVersion > rhs.DataVersion) { return 1; } else { return 0; } } }).DataVersion; ((MainActivity) activity).Versions.put(zopType, max); try { FileOutputStream fos = activity.openFileOutput(key, Context.MODE_PRIVATE); ObjectOutputStream oos = new ObjectOutputStream(fos); int count = typedZops.size(); typedZops = new ArrayList<>(Collections2.filter(temp, new Predicate<MobileZop>() { @Override public boolean apply(MobileZop input) { return input.Type == type && (!preferences.contains(StorageKeys.COUNTRY_KEY) || preferences.getString(StorageKeys.COUNTRY_KEY, "").equals("") || input.CountryID .equals(preferences.getString(StorageKeys.COUNTRY_KEY, ""))); } })); oos.writeObject(typedZops); oos.close(); fos.close(); editor.putString(key, Integer.toString(count)); editor.commit(); setCount(count); } catch (FileNotFoundException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } } if (adapter != null) { adapter.setObjects(typedZops); resetVisibility(false); adapter.notifyDataSetChanged(); } } @Override public void onFailure(@NonNull Throwable t) { ListView zops = (ListView) activity.findViewById(R.id.listViewZops); RelativeLayout loader = (RelativeLayout) activity.findViewById(R.id.relativeLayoutLoader); LinearLayout noZops = (LinearLayout) activity.findViewById(R.id.noZops); resetVisibility(zops, noZops, loader, false); } }); } } @Override public void onResume() { super.onResume(); if (adapter != null) { adapter.setObjects(typedZops); adapter.notifyDataSetChanged(); } } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_typed_zops, container, false); ListView listView = (ListView) rootView.findViewById(R.id.listViewZops); resetVisibility(listView, (LinearLayout) rootView.findViewById(R.id.noZops), (RelativeLayout) rootView.findViewById(R.id.relativeLayoutLoader), force); listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { MobileZop item = (MobileZop) parent.getAdapter().getItem(position); MainActivity activity = (MainActivity) getActivity(); if (activity.AdsActive && activity.Interstitial.isLoaded()) { activity.Interstitial.show(); } activity.setCurrentItem(item.id, item); activity.nextMenu(ZopItemFragment.newInstance(item.id), true, 100); } }); listView.setAdapter(adapter); return rootView; } @Override public void onAttach(Activity activity) { super.onAttach(activity); } private void setCount(int count) { if (count > 0) { ((MainActivity) getActivity()).Counts.put(zopType, count); } } private void resetVisibility(boolean showLoader) { Activity activity = getActivity(); ListView zops = (ListView) activity.findViewById(R.id.listViewZops); LinearLayout noZops = (LinearLayout) activity.findViewById(R.id.noZops); RelativeLayout loader = (RelativeLayout) activity.findViewById(R.id.relativeLayoutLoader); resetVisibility(zops, noZops, loader, showLoader); } private void resetVisibility(ListView zops, LinearLayout noZops, RelativeLayout loader, boolean showLoader) { Activity activity = getActivity(); MainActivity mainActivity = (MainActivity) activity; if (typedZops.size() == 0 && mainActivity.Counts.get(zopType) == 0) { noZops.setVisibility(View.VISIBLE); zops.setVisibility(View.INVISIBLE); } else { noZops.setVisibility(View.INVISIBLE); zops.setVisibility(View.VISIBLE); } if (showLoader) { zops.setVisibility(View.INVISIBLE); noZops.setVisibility(View.INVISIBLE); loader.setVisibility(View.VISIBLE); } else { loader.setVisibility(View.INVISIBLE); } } }