Java tutorial
/* * Copyright (C) 2015 Kyle O'Shaughnessy, Ross Anderson, Michelle Mabuyo, John Slevinsky, Udey Rishi, Quentin Lautischer * Photography equipment trading application for CMPUT 301 at the University of Alberta. * * This file is part of "Trading Post" * * "Trading Post" is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package ca.ualberta.cmput301.t03.inventory; import android.app.Activity; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.Intent; import android.os.AsyncTask; import android.os.Bundle; import android.support.design.widget.FloatingActionButton; import android.support.v4.app.Fragment; import android.support.v4.widget.SwipeRefreshLayout; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.EditText; import android.widget.ListView; import android.widget.Spinner; import android.widget.Toast; import org.parceler.Parcels; import java.io.IOException; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import java.util.List; import java.util.UUID; import java.util.concurrent.Callable; import ca.ualberta.cmput301.t03.Observable; import ca.ualberta.cmput301.t03.Observer; import ca.ualberta.cmput301.t03.PrimaryUser; import ca.ualberta.cmput301.t03.R; import com.udeyrishi.androidelasticsearchdatamanager.exceptions.ServiceNotAvailableException; import ca.ualberta.cmput301.t03.filters.FilterCriteria; import ca.ualberta.cmput301.t03.filters.FilterDialogs; import ca.ualberta.cmput301.t03.filters.item_criteria.CategoryFilterCriteria; import ca.ualberta.cmput301.t03.filters.item_criteria.PrivateFilterCriteria; import ca.ualberta.cmput301.t03.filters.item_criteria.StringQueryFilterCriteria; import ca.ualberta.cmput301.t03.user.User; /** * Fragment that displays the User's Inventory in a ListView. * <p> * By clicking the listed Items here the user can inspect, edit and delete. * The User can add an item by pressing the FloatingActionButton. */ public class UserInventoryFragment extends Fragment implements Observer, SwipeRefreshLayout.OnRefreshListener { private static final String ARG_PARAM1 = "user"; Activity mActivity; View mView; private Inventory model; private UserInventoryController controller; private User user; private FloatingActionButton addItemFab; private ListView listview; private ItemsAdapter<Inventory> adapter; private HashMap<Integer, UUID> positionMap; List<HashMap<String, Object>> tiles; private SwipeRefreshLayout mSwipeRefreshLayout; private ArrayList<FilterCriteria> filters; public UserInventoryFragment() { // Required empty public constructor } public static UserInventoryFragment newInstance(User u) { UserInventoryFragment fragment = new UserInventoryFragment(); Bundle args = new Bundle(); args.putParcelable(ARG_PARAM1, Parcels.wrap(u)); fragment.setArguments(args); return fragment; } public static UserInventoryFragment newInstance() { return new UserInventoryFragment(); } /** * Gets User associated to system config. Loads any data associated to user. * * @param savedInstanceState */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); mActivity = getActivity(); positionMap = new HashMap<>(); filters = new ArrayList<>(); setHasOptionsMenu(true); if (getArguments() != null) { // String username = getArguments().getString(ARG_PARAM1); user = Parcels.unwrap(getArguments().getParcelable(ARG_PARAM1)); if (PrimaryUser.getInstance().equals(user)) { user = PrimaryUser.getInstance(); } else { // user = new User(user.getUsername(), getActivity().getApplicationContext()); try { user = PrimaryUser.getInstance().getFriends().getFriend(user.getUsername()); } catch (IOException e) { e.printStackTrace(); } catch (ServiceNotAvailableException e) { throw new RuntimeException("OFFLINE CANT DO THIS I GUESS"); } } } else { user = PrimaryUser.getInstance(); } AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>() { @Override protected Void doInBackground(Void[] params) { try { // user = PrimaryUser.getInstance(); model = user.getInventory(); if (!PrimaryUser.getInstance().equals(user)) { filters.add(new PrivateFilterCriteria()); //no refresh here } controller = new UserInventoryController(getContext(), model); } catch (IOException e) { e.printStackTrace(); } catch (ServiceNotAvailableException e) { throw new RuntimeException("App is offline.", e); } return null; } @Override protected void onPostExecute(Void o) { fragmentSetup(getView()); setupFab(getView()); } }; task.execute(); } @Override public void onResume() { onRefresh(); super.onResume(); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { final View v = inflater.inflate(R.layout.fragment_user_inventory, container, false); mView = v; setupSwipeRefresh(v); return v; } /** * Starts activity used to create a new item */ public void addItemButtonClicked() { Intent intent = new Intent(getContext(), AddItemView.class); startActivity(intent); } private void fragmentSetup(View v) { createListView(v); } /** * Creates ListView Adapter and Item onClickListeners * This represents the users inventory. * @param v */ public void createListView(View v) { final View view = v; listview = (ListView) v.findViewById(R.id.InventoryListView); adapter = new ItemsAdapter<>(getContext(), model); listview.setAdapter(adapter); listview.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { inspectItem((Item) listview.getItemAtPosition(position)); } }); } /** * Starts activity in which an Item Can be inspected * * @param item */ public void inspectItem(Item item) { Intent intent = null; if (PrimaryUser.getInstance().equals(user)) { intent = new Intent(getContext(), EditItemView.class); intent.putExtra("user", user.getUsername()); intent.putExtra("ITEM_UUID", item.getUuid().toString()); } else { intent = new Intent(getContext(), InspectItemView.class); // intent.putExtra("user", Parcels.wrap(user)); // intent.putExtra("inventory/inspect/item", Parcels.wrap(item)); // new and improved way intent.putExtra("user", user.getUsername()); intent.putExtra("ITEM_UUID", item.getUuid().toString()); } startActivity(intent); } @Override public void onDestroy() { super.onDestroy(); if (model != null) { model.removeObserver(this); } } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { super.onCreateOptionsMenu(menu, inflater); inflater.inflate(R.menu.inventory_filter_menu_items, menu); } @Override public boolean onOptionsItemSelected(MenuItem item) { AlertDialog alertDialog; switch (item.getItemId()) { case R.id.filter_inventory_button: alertDialog = FilterDialogs.createAddFilterDialog(getContext(), filters, new Callable<Void>() { @Override public Void call() throws Exception { onRefresh(); //Ideally like to not full refresh and just have the adapter watch the item list change return null; } }); alertDialog.show(); return true; case R.id.search_inventory_button: alertDialog = FilterDialogs.createAddSearchDialog(getContext(), filters, new Callable<Void>() { @Override public Void call() throws Exception { onRefresh(); //Ideally like to not full refresh and just have the adapter watch the item list change return null; } }); alertDialog.show(); return true; default: return super.onOptionsItemSelected(item); } } private void setupFab(View v) { addItemFab = (FloatingActionButton) v.findViewById(R.id.addItemInventoryFab); if (PrimaryUser.getInstance().equals(user)) { addItemFab.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { addItemButtonClicked(); } }); } else { addItemFab.hide(); } } @Override public void update(Observable observable) { onRefresh(); } public void setupSwipeRefresh(View v) { mSwipeRefreshLayout = (SwipeRefreshLayout) v.findViewById(R.id.userInventorySwipeLayout); mSwipeRefreshLayout.setOnRefreshListener(this); } @Override public void onRefresh() { AsyncTask<Void, Void, Void> task = new AsyncTask<Void, Void, Void>() { @Override protected Void doInBackground(Void... params) { try { PrimaryUser.getInstance().refresh(); model = user.getInventory(); } catch (IOException e) { e.printStackTrace(); } catch (ServiceNotAvailableException e) { e.printStackTrace(); } return null; } @Override protected void onPostExecute(Void aVoid) { model.setFilters(filters); adapter.notifyUpdated(model); mSwipeRefreshLayout.setRefreshing(false); } }; task.execute(); } }