Java tutorial
/* * SBHS-Timetable-Android: Countdown and timetable all at once (Android app). * Copyright (C) 2014 Simon Shields, James Ye * * This file is part of SBHS-Timetable-Android. * * 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 com.sbhstimetable.sbhs_timetable_android; import android.app.Activity; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.res.Resources; import android.os.Bundle; import android.app.Fragment; import android.os.CountDownTimer; import android.os.Handler; import android.support.v4.content.LocalBroadcastManager; import android.support.v4.widget.SwipeRefreshLayout; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuInflater; import android.view.View; import android.view.ViewGroup; import android.widget.RelativeLayout; import android.widget.TextView; import android.widget.Toast; import com.sbhstimetable.sbhs_timetable_android.backend.ApiAccessor; import com.sbhstimetable.sbhs_timetable_android.backend.internal.CommonFragmentInterface; import com.sbhstimetable.sbhs_timetable_android.backend.internal.ThemeHelper; import com.sbhstimetable.sbhs_timetable_android.backend.json.BelltimesJson; import com.sbhstimetable.sbhs_timetable_android.backend.DateTimeHelper; import com.sbhstimetable.sbhs_timetable_android.backend.json.TodayJson; import com.sbhstimetable.sbhs_timetable_android.debug.DebugActivity; public class CountdownFragment extends Fragment { private CommonFragmentInterface mListener; private static CountDownTimer timeLeft; private static boolean cancelling = false; private SwipeRefreshLayout mainView; private BroadcastListener listener; private int tapCount = 0; private boolean refreshing = false; /** * Use this factory method to create a new instance of * this fragment using the provided parameters. * * @return A new instance of fragment TimetableFragment. */ public static CountdownFragment newInstance() { CountdownFragment fragment = new CountdownFragment(); Bundle args = new Bundle(); fragment.setArguments(args); return fragment; } public CountdownFragment() { // Required empty public constructor } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setHasOptionsMenu(true); } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // Inflate the layout for this fragment final CountdownFragment me = this; final SwipeRefreshLayout f = (SwipeRefreshLayout) inflater.inflate(R.layout.fragment_countdown, container, false); f.findViewById(R.id.countdown_name).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { if (++tapCount == 7) { Toast.makeText(getActivity(), R.string.toast_debug_entry, Toast.LENGTH_SHORT).show(); tapCount = 0; Intent i = new Intent(getActivity(), DebugActivity.class); getActivity().startActivity(i); } } }); if (ThemeHelper.isBackgroundDark()) { f.setProgressBackgroundColor(R.color.background_floating_material_dark); } else { f.setProgressBackgroundColor(R.color.background_floating_material_light); } f.setColorSchemeColors(getResources().getColor(R.color.blue), getResources().getColor(R.color.green), getResources().getColor(R.color.yellow), getResources().getColor(R.color.red)); f.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() { @Override public void onRefresh() { refreshing = true; ApiAccessor.getNotices(me.getActivity(), false); ApiAccessor.getToday(me.getActivity(), false); ApiAccessor.getBelltimes(me.getActivity(), false); } }); this.mainView = f; return f; } @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { super.onCreateOptionsMenu(menu, inflater); this.mListener.updateCachedStatus(menu); } @Override public void onStart() { super.onStart(); } @Override public void onResume() { super.onResume(); if (timeLeft != null) { cancelling = true; timeLeft.cancel(); cancelling = false; } this.updateTimer(); } public void updateTimer() { final View f = this.getView(); if (f == null) { return; } if (timeLeft != null) { cancelling = true; timeLeft.cancel(); cancelling = false; } RelativeLayout extraData = (RelativeLayout) f.findViewById(R.id.countdown_extraData); TextView teacher = (TextView) extraData.findViewById(R.id.countdown_extraData_teacher); teacher.setText(""); TextView room = (TextView) extraData.findViewById(R.id.countdown_extraData_room); room.setText(""); TextView subject = (TextView) extraData.findViewById(R.id.countdown_extraData_subject); subject.setText(""); String label = "Something"; String connector = "happens in"; TodayJson.Period p = null; if (DateTimeHelper.bells != null) { BelltimesJson.Bell next = DateTimeHelper.bells.getNextBell(); if (next != null) { BelltimesJson.Bell now = DateTimeHelper.bells.getIndex(next.getIndex() - 1); if (now.isPeriod() && now.getPeriodNumber() < 5) { // in a period, it's not last period. connector = "ends in"; if (ApiAccessor.isLoggedIn() && TodayJson.getInstance() != null) { p = TodayJson.getInstance().getPeriod(now.getPeriodNumber()); label = p.name(); teacher.setText(p.teacher()); room.setText(p.room()); subject.setText(p.name()); extraData.setVisibility(View.VISIBLE); } else { label = now.getLabel(); extraData.setVisibility(View.INVISIBLE); } } else if (now.isPeriod() && now.getPeriodNumber() == 5) { // last period connector = "in"; label = "School ends"; extraData.setVisibility(View.INVISIBLE); } else if (now.getIndex() + 1 < DateTimeHelper.bells.getMaxIndex() && DateTimeHelper.bells.getIndex(now.getIndex() + 1).isPeriod()) { // in a break followed by a period - Lunch 2, Recess, Transition. connector = "starts in"; if (ApiAccessor.isLoggedIn() && TodayJson.getInstance() != null) { p = TodayJson.getInstance() .getPeriod(DateTimeHelper.bells.getIndex(now.getIndex() + 1).getPeriodNumber()); label = p.name(); teacher.setText(p.teacher()); room.setText(p.room()); subject.setText(p.name()); extraData.setVisibility(View.VISIBLE); } else { label = DateTimeHelper.bells.getIndex(now.getIndex() + 1).getLabel(); extraData.setVisibility(View.VISIBLE); } } else { // There's consecutive non-periods - i.e lunch 1 -> lunch 2 label = now.getLabel(); connector = "starts in"; } } else { // end of day label = "School starts"; connector = "in"; if (TodayJson.getInstance() != null && TodayJson.getInstance().getPeriod(1) != null) { extraData.setVisibility(View.VISIBLE); p = TodayJson.getInstance().getPeriod(1); teacher.setText(p.teacher()); room.setText(p.room()); subject.setText(p.name()); } else { extraData.setVisibility(View.INVISIBLE); } } } if (p != null) { if (p.teacherChanged()) { teacher.setTextColor(getActivity().getResources().getColor(R.color.standout)); } else { //teacher.setTextColor(getActivity().getResources().getColor(R.color.secondary_text_dark)); } if (p.roomChanged()) { room.setTextColor(getActivity().getResources().getColor(R.color.standout)); } else { //room.setTextColor(getActivity().getResources().getColor(android.R.color.secondary_text_dark)); } } final String innerLabel = label; ((TextView) f.findViewById(R.id.countdown_name)).setText(label); ((TextView) f.findViewById(R.id.countdown_in)).setText(connector); final TextView t = (TextView) f.findViewById(R.id.countdown_countdown); final CountdownFragment frag = this; CountDownTimer timer = new CountDownTimer(DateTimeHelper.milliSecondsUntilNextEvent(), 1000) { long lastTime = 10000; boolean isLast = innerLabel.equals("School ends"); @Override public void onTick(long l) { lastTime = l; t.setText(DateTimeHelper.formatToCountdown(l)); } @Override public void onFinish() { if (this.lastTime <= 1000 && !cancelling) { if (this.isLast) { ApiAccessor.getToday(frag.getActivity()); ApiAccessor.getBelltimes(frag.getActivity()); } final Handler h = new Handler(); h.postDelayed(new Runnable() { @Override public void run() { updateTimer(); } }, 1000); } } }; timer.start(); timeLeft = timer; } @Override public void onAttach(Activity activity) { super.onAttach(activity); IntentFilter i = new IntentFilter(TimetableActivity.BELLTIMES_AVAILABLE); i.addAction(TimetableActivity.TODAY_AVAILABLE); i.addAction(ApiAccessor.ACTION_BELLTIMES_JSON); i.addAction(ApiAccessor.ACTION_TODAY_JSON); i.addAction(ApiAccessor.ACTION_TODAY_FAILED); if (this.listener == null) { this.listener = new BroadcastListener(); } LocalBroadcastManager.getInstance(this.getActivity()).registerReceiver(this.listener, i); ApiAccessor.getBelltimes(activity, true); ApiAccessor.getToday(activity, true); try { mListener = (CommonFragmentInterface) activity; } catch (ClassCastException e) { throw new ClassCastException(activity.toString() + " must implement OnFragmentInteractionListener"); } } @Override public void onDetach() { super.onDetach(); LocalBroadcastManager.getInstance(this.getActivity()).unregisterReceiver(this.listener); mListener = null; } private class BroadcastListener extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { updateTimer(); if (intent.getAction().equals(ApiAccessor.ACTION_BELLTIMES_JSON)) { if (mainView != null) mainView.setRefreshing(false); if (refreshing) Toast.makeText(getActivity(), R.string.refresh_success, Toast.LENGTH_SHORT).show(); refreshing = false; } if (intent.getAction().equals(TimetableActivity.TODAY_AVAILABLE) && BelltimesJson.getInstance() != null) { ApiAccessor.getBelltimes(context); } else if (intent.getAction().equals(ApiAccessor.ACTION_TODAY_FAILED)) { if (refreshing) Toast.makeText(context, intent.getIntExtra(ApiAccessor.EXTRA_ERROR_MESSAGE, R.string.err_noerr), Toast.LENGTH_SHORT).show(); refreshing = false; } } } }