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.backend.service; import android.app.PendingIntent; import android.appwidget.AppWidgetManager; import android.content.BroadcastReceiver; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.support.v4.content.LocalBroadcastManager; import android.util.Log; import android.widget.RemoteViews; import android.widget.RemoteViewsService; import com.sbhstimetable.sbhs_timetable_android.LoginActivity; import com.sbhstimetable.sbhs_timetable_android.R; import com.sbhstimetable.sbhs_timetable_android.backend.ApiAccessor; import com.sbhstimetable.sbhs_timetable_android.backend.DateTimeHelper; import com.sbhstimetable.sbhs_timetable_android.backend.internal.JsonUtil; import com.sbhstimetable.sbhs_timetable_android.backend.json.TodayJson; import java.util.Calendar; import java.util.GregorianCalendar; import java.util.concurrent.ScheduledExecutorService; import java.util.concurrent.ScheduledThreadPoolExecutor; import java.util.concurrent.TimeUnit; public class TodayWidgetService extends RemoteViewsService { @Override public RemoteViewsFactory onGetViewFactory(Intent intent) { return new TodayRemoteViewsFactory(this, TodayJson.getInstance()); } class TodayRemoteViewsFactory implements RemoteViewsFactory { private TodayJson today; private Context con; TodayRemoteViewsFactory(Context c, TodayJson t) { this.con = c; this.today = t; } @Override public void onCreate() { LocalBroadcastManager.getInstance(con).registerReceiver(new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { today = new TodayJson( JsonUtil.safelyParseJson(intent.getStringExtra(ApiAccessor.EXTRA_JSON_DATA))); Intent i = new Intent(); int ids[] = AppWidgetManager.getInstance(getApplication()) .getAppWidgetIds(new ComponentName(getApplication(), TodayAppWidget.class)); i.setAction(AppWidgetManager.ACTION_APPWIDGET_UPDATE); i.setClass(con, TodayAppWidget.class); i.putExtra(AppWidgetManager.EXTRA_APPWIDGET_IDS, ids); sendBroadcast(i); } }, new IntentFilter(ApiAccessor.ACTION_TODAY_JSON)); ApiAccessor.load(con); ApiAccessor.getToday(con); ScheduledExecutorService ses = new ScheduledThreadPoolExecutor(1); Calendar c = new GregorianCalendar(); c.set(Calendar.HOUR_OF_DAY, 15); c.set(Calendar.MINUTE, 16); long wait = c.getTimeInMillis() - DateTimeHelper.getTimeMillis(); if (wait < 0) return; // bail out. Log.i("todayWidgetService", "updating in " + DateTimeHelper.formatToCountdown(wait)); ses.schedule(new Runnable() { @Override public void run() { ApiAccessor.getToday(con); ApiAccessor.getBelltimes(con); // update all the things yea } }, wait, TimeUnit.MILLISECONDS); } @Override public void onDataSetChanged() { } @Override public void onDestroy() { Log.i("todayWidgetService", "bye"); } @Override public int getCount() { return this.today != null && this.today.valid() ? 6 : 1; } @Override public RemoteViews getViewAt(int i) { if (this.today == null || !this.today.valid()) { RemoteViews r = new RemoteViews(con.getPackageName(), R.layout.layout_textview); r.setTextViewText(R.id.label, "You need to log in"); Intent t = new Intent(con, LoginActivity.class); t.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK); r.setOnClickPendingIntent(R.id.label, PendingIntent.getActivity(this.con, 0, t, 0)); return r; } if (i == 0) { RemoteViews r = new RemoteViews(con.getPackageName(), R.layout.layout_textview); String res = today.getDayName(); r.setTextViewText(R.id.label, res); //r.setInt(R.id.label, "setGravity", Gravity.LEFT); return r; } TodayJson.Period p = this.today.getPeriod(i); RemoteViews r = new RemoteViews(con.getPackageName(), R.layout.layout_timetable_classinfo_widget); r.setTextViewText(R.id.timetable_class_header, p.name()); r.setTextViewText(R.id.timetable_class_room, p.room()); int standout = getResources().getColor(R.color.standout); if (p.roomChanged()) { r.setTextColor(R.id.timetable_class_room, standout); } r.setTextViewText(R.id.timetable_class_teacher, p.teacher()); if (p.teacherChanged()) { r.setTextColor(R.id.timetable_class_teacher, standout); } if (!p.changed() || !today.finalised()) { r.setImageViewBitmap(R.id.timetable_class_changed, null); } return r; } @Override public RemoteViews getLoadingView() { RemoteViews r = new RemoteViews(con.getPackageName(), R.layout.layout_textview); r.setTextViewText(R.id.label, "Loading"); return r; } @Override public int getViewTypeCount() { return 2; } @Override public long getItemId(int i) { return i; } @Override public boolean hasStableIds() { return false; } } }