Java tutorial
/* * Copyright (c) 2015 Jim X. Lin * * This file is part of SetMinder. * * SetMinder 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. * * SetMinder 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 SetMinder. If not, see <http://www.gnu.org/licenses/>. */ package com.miljin.setminder; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.media.MediaPlayer; import android.os.CountDownTimer; import android.os.IBinder; import android.os.PowerManager; import android.os.Vibrator; import android.preference.PreferenceManager; import android.support.v4.app.NotificationCompat; public class TimerService extends Service { public static final String EXTRA_TIMER_TICK = "com.miljin.setminder.TIMER_TICK"; public static final String EXTRA_TIMER_DONE = "com.miljin.setminder.TIMER_DONE"; public static boolean timerServiceTicking = false; long seconds; NotificationCompat.Builder notificationBuilder; NotificationManager notificationManager; int notifyID = 1; CountDownTimer myCountDownTimer; public static MediaPlayer alarmPlayer; public static Vibrator vibrator; @Override public int onStartCommand(Intent intent, int flags, int startId) { //keep CPU on while timer is ticking PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE); final PowerManager.WakeLock wakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, "MyWakelockTag"); wakeLock.acquire(); seconds = intent.getLongExtra(MainActivity.EXTRA_START_TIME, 0); Intent getActivityIntent = new Intent(this, MainActivity.class); PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, getActivityIntent, PendingIntent.FLAG_UPDATE_CURRENT); //make notification notificationBuilder = new NotificationCompat.Builder(this); notificationBuilder .setContentTitle(getResources().getString(com.miljin.setminder.R.string.notification_title)); if (seconds >= 120) { notificationBuilder.setContentText(Long.toString(seconds / 60) + getResources().getString(com.miljin.setminder.R.string.notification_text_plural)); } else { notificationBuilder.setContentText( getResources().getString(com.miljin.setminder.R.string.notification_text_minute)); } notificationBuilder.setSmallIcon(com.miljin.setminder.R.drawable.ic_notification); notificationBuilder.setContentIntent(pendingIntent); notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); notificationManager.notify(notifyID, notificationBuilder.build()); myCountDownTimer = new CountDownTimer(seconds * 1000, 100) { public void onTick(long millisUntilFinished) { timerServiceTicking = true; broadcastTime(millisUntilFinished); sendNotification(millisUntilFinished); } public void onFinish() { timerServiceTicking = false; broadcastDone(); wakeLock.release(); } }; myCountDownTimer.start(); return START_NOT_STICKY; } @Override public IBinder onBind(Intent intent) { return null; } @Override public void onDestroy() { myCountDownTimer.cancel(); super.onDestroy(); } public void broadcastTime(long inputMillis) { //(re)start main activity in preparation to receive "timer done" intent //main activity will come to foreground whether it was paused or destroyed //putting this block in broadcastDone() will (re)start the activity BUT the broadcast... // ...will NOT get received, therefore finishTimer() will not get called (tested) if (inputMillis < 500) { Intent intent = new Intent(getApplicationContext(), MainActivity.class); intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); intent.addFlags(Intent.FLAG_ACTIVITY_REORDER_TO_FRONT); startActivity(intent); } Intent tickIntent = new Intent(MainActivity.ACTION_RECEIVE_TIMER_TICK); tickIntent.putExtra(EXTRA_TIMER_TICK, inputMillis); sendBroadcast(tickIntent); } public void broadcastDone() { //Activate alarm when timer is finished, depending on settings SharedPreferences settingsPrefs = PreferenceManager.getDefaultSharedPreferences(this); if (settingsPrefs.getBoolean("enable_alarm_vibrate", false)) { vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); long[] vibratePattern = new long[] { 500, 500, 500, 500, 2500, 500, 500, 500, 2500, 500, 500, 500 }; vibrator.vibrate(vibratePattern, -1); } if (settingsPrefs.getBoolean("enable_alarm_sound", false)) { alarmPlayer = MediaPlayer.create(this, com.miljin.setminder.R.raw.alarm1); alarmPlayer.start(); } notificationManager.cancelAll(); //send broadcast Intent tickIntent = new Intent(MainActivity.ACTION_RECEIVE_TIMER_DONE); tickIntent.putExtra(EXTRA_TIMER_DONE, true); sendBroadcast(tickIntent); stopSelf(); } public void sendNotification(long inputMillis) { //send notifications at 1 minute intervals if ((inputMillis / 1000) % 60 == 0) { //millisUntilFinished aren't multiples of 100ms, need to round notificationBuilder .setContentTitle(getResources().getString(com.miljin.setminder.R.string.notification_title)); if (inputMillis >= 61000) { notificationBuilder.setContentText(Long.toString(inputMillis / 60000) + getResources().getString(com.miljin.setminder.R.string.notification_text_plural)); } else { notificationBuilder.setContentText( getResources().getString(com.miljin.setminder.R.string.notification_text_minute)); } notificationBuilder.setSmallIcon(com.miljin.setminder.R.drawable.ic_notification); notificationManager.notify(notifyID, notificationBuilder.build()); } } }