Java tutorial
/* * Copyright (C) 2013 - Gareth Llewellyn * * This file is part of the Unofficial HackedIO Android App https://github.com/NetworksAreMadeOfString/HackedIO-Android-App * * This app is unofficial. The "Hacked.io" logo is copyright (and maybe even a trademark of) Telefnica UK Limited. * The author of this app is not affiliated with Telefnica UK Limited, The Lab ( https://thelab.o2.com/ ) or * Geeks of London ( http://geeksoflondon.com/ ) although the author <strong>is</strong> an attendee. * * This program 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 app.hacked; import android.app.Activity; import android.os.Bundle; import android.support.v4.app.ListFragment; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.ListView; import android.widget.Toast; import com.android.volley.Request; import com.android.volley.RequestQueue; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.JsonObjectRequest; import com.android.volley.toolbox.Volley; import org.json.JSONObject; import java.util.ArrayList; import java.util.List; public class ScheduleListFragment extends ListFragment { /*TrapListAdapter adapter = null; TrapsDataSource datasource = null;*/ RequestQueue queue = null; public static final int ATTACHTYPE = 0; /** * A list of the times where Hacked.io events will be happening */ public List<ScheduleItem> HackedIOSchedule = null; /** * The serialization (saved instance state) Bundle key representing the * activated item position. Only used on tablets. */ private static final String STATE_ACTIVATED_POSITION = "activated_position"; /** * The fragment's current callback object, which is notified of list item * clicks. */ private Callbacks mCallbacks = sDummyCallbacks; /** * The current activated item position. Only used on tablets. */ private int mActivatedPosition = ListView.INVALID_POSITION; private String mSelectedHost = null; private View progressBar = null; /** * */ ScheduleListAdapter adapter = null; /** * A callback interface that all activities containing this fragment must * implement. This mechanism allows activities to be notified of item * selections. */ public interface Callbacks { /** * Callback for when an item has been selected. */ public void onScheduleItemSelected(ScheduleItem SchItem); } /** * A dummy implementation of the {@link Callbacks} interface that does * nothing. Used only when this fragment is not attached to an activity. */ private static Callbacks sDummyCallbacks = new Callbacks() { @Override public void onScheduleItemSelected(ScheduleItem SchItem) { } }; /** * Mandatory empty constructor for the fragment manager to instantiate the * fragment (e.g. upon screen orientation changes). */ public ScheduleListFragment() { } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); queue = Volley.newRequestQueue(getActivity()); } private void getData() { if (null != progressBar) progressBar.setVisibility(View.VISIBLE); HackedIOSchedule = new ArrayList<ScheduleItem>(); String url = "http://hackedioapp.networksaremadeofstring.co.uk/schedule.php"; JsonObjectRequest jsObjRequest = new JsonObjectRequest(Request.Method.GET, url, null, new Response.Listener<JSONObject>() { @Override public void onResponse(JSONObject response) { /*txtDisplay.setText("Response => "+response.toString()); findViewById(R.id.progressBar1).setVisibility(View.GONE);*/ try { if (response.has("success") && response.getBoolean("success") && response.has("schedule")) { JSONObject schedule = response.getJSONObject("schedule"); int size = schedule.length() + 1; for (int i = 1; i < size; i++) { JSONObject schedItem = schedule.getJSONObject(Integer.toString(i)); HackedIOSchedule.add(new ScheduleItem(Integer.toString(i), schedItem.getString("scheduleTitle"), schedItem.getString("scheduleStartTime"), schedItem.getString("scheduleEndTime"), schedItem.getString("scheduleDesc"), schedItem.getString("isDayTitle"), schedItem.getString("scheduleFullDataHTML"))); } adapter = new ScheduleListAdapter(getActivity(), HackedIOSchedule); if (null != progressBar) progressBar.setVisibility(View.GONE); setListAdapter(adapter); } else { Toast.makeText(getActivity(), "An Error Was encountered", Toast.LENGTH_SHORT) .show(); } } catch (Exception e) { e.printStackTrace(); Toast.makeText(getActivity(), "An Error Was encountered", Toast.LENGTH_SHORT).show(); } } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { // TODO Auto-generated method stub Toast.makeText(getActivity(), "An Error Was encountered", Toast.LENGTH_SHORT).show(); } }); queue.add(jsObjRequest); } @Override public void onViewCreated(View view, Bundle savedInstanceState) { super.onViewCreated(view, savedInstanceState); // Restore the previously serialized activated item position. if (savedInstanceState != null && savedInstanceState.containsKey(STATE_ACTIVATED_POSITION)) { setActivatedPosition(savedInstanceState.getInt(STATE_ACTIVATED_POSITION)); } if (getActivity().findViewById(R.id.ScheduleDetails) != null && savedInstanceState == null) { ScheduleWelcomeFragment fragment = new ScheduleWelcomeFragment(); getActivity().getSupportFragmentManager().beginTransaction().replace(R.id.ScheduleDetails, fragment) .commit(); } getData(); /*if(savedInstanceState != null) progressBar.setVisibility(View.GONE);*/ } @Override public void onAttach(Activity activity) { super.onAttach(activity); // Activities containing this fragment must implement its callbacks. if (!(activity instanceof Callbacks)) { throw new IllegalStateException("Activity must implement fragment's callbacks."); } mCallbacks = (Callbacks) activity; } @Override public void onDetach() { super.onDetach(); // Reset the active callbacks interface to the dummy implementation. mCallbacks = sDummyCallbacks; } @Override public void onListItemClick(ListView listView, View view, int position, long id) { super.onListItemClick(listView, view, position, id); // Notify the active callbacks interface (the activity, if the // fragment is attached to one) that an item has been selected. //mCallbacks.onItemSelected(DummyContent.ITEMS.get(position).id); mCallbacks.onScheduleItemSelected(HackedIOSchedule.get(position)); //We want to keep track of this for our own purposes mActivatedPosition = position; //mSelectedScheduleItem = HackedIOSchedule.get(position).Hostname; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View view = inflater.inflate(R.layout.schedule_list_fragment, null); progressBar = view.findViewById(R.id.progressBar); return view; } @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); if (mActivatedPosition != ListView.INVALID_POSITION) { // Serialize and persist the activated item position. outState.putInt(STATE_ACTIVATED_POSITION, mActivatedPosition); } } /** * Turns on activate-on-click mode. When this mode is on, list items will be * given the 'activated' state when touched. */ public void setActivateOnItemClick(boolean activateOnItemClick) { // When setting CHOICE_MODE_SINGLE, ListView will automatically // give items the 'activated' state when touched. getListView().setChoiceMode(activateOnItemClick ? ListView.CHOICE_MODE_SINGLE : ListView.CHOICE_MODE_NONE); } private void setActivatedPosition(int position) { if (position == ListView.INVALID_POSITION) { getListView().setItemChecked(mActivatedPosition, false); } else { getListView().setItemChecked(position, true); } mActivatedPosition = position; } }