Java tutorial
/* Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. */ package sintef.android.gravity; import android.app.Notification; import android.app.NotificationManager; import android.app.PendingIntent; import android.app.Service; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.AsyncTask; import android.os.Handler; import android.os.IBinder; import android.os.PowerManager; import android.support.v4.app.NotificationCompat; import android.util.Log; import de.greenrobot.event.EventBus; import sintef.android.controller.AlarmEvent; import sintef.android.controller.Controller; import sintef.android.controller.EventTypes; import sintef.android.controller.utils.PreferencesHelper; import sintef.android.controller.utils.SoundHelper; /** * Created by samyboy89 on 03/02/15. */ public class AlarmService extends Service { private NotificationManager mNotificationManager; private Notification.Builder mNotificationBuilder; private PowerManager.WakeLock mWakeLock; private TimerState mTimerState = TimerState.PENDING; public static final String ALARM_STARTED = "alarm_started"; private final int WAIT_BEFORE_RESET_PERIOD = 5000; public static final int SCREEN_OFF_RECEIVER_DELAY = 500; private BroadcastReceiver mScreenStateReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { if (!intent.getAction().equals(Intent.ACTION_SCREEN_OFF)) return; Runnable runnable = new Runnable() { public void run() { EventBus.getDefault().post(EventTypes.RESET_SENSOR_LISTENERS); } }; new Handler().postDelayed(runnable, SCREEN_OFF_RECEIVER_DELAY); } }; private AsyncTask<Void, Integer, Boolean> mAlarmTask; private final int seconds = 60; private final int resolution_multiplier = 4; private final int max = seconds * resolution_multiplier; private final int second = 1000; private final int resolution_second = second / resolution_multiplier; private final int update_frequency = resolution_multiplier * 4; @Override public void onCreate() { EventBus.getDefault().registerSticky(this); Controller.initializeController(this); SoundHelper.initializeSoundsHelper(this); PreferencesHelper.initializePreferences(this); PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE); mWakeLock = powerManager.newWakeLock(PowerManager.PARTIAL_WAKE_LOCK, AlarmService.class.getName()); registerReceiver(mScreenStateReceiver, new IntentFilter(Intent.ACTION_SCREEN_OFF)); mNotificationManager = (NotificationManager) getSystemService(NOTIFICATION_SERVICE); EventBus.getDefault().post(EventTypes.ONRESUME); } @Override public int onStartCommand(Intent intent, int flags, int startId) { mNotificationBuilder = new Notification.Builder(getApplicationContext()) .setPriority(NotificationCompat.PRIORITY_HIGH) .setContentTitle(getString(R.string.phone_notification_detecting)).setAutoCancel(false) .setOngoing(true).setSmallIcon(R.drawable.ic_stat_on); startForeground(R.string.app_name, mNotificationBuilder.build()); mWakeLock.acquire(); return START_STICKY; //super.onStartCommand(intent, flags, startId); } @Override public void onDestroy() { super.onDestroy(); unregisterReceiver(mScreenStateReceiver); mWakeLock.release(); stopForeground(true); mNotificationManager.cancel(R.string.app_name); } @Override public IBinder onBind(Intent intent) { return null; } public synchronized void onEvent(EventTypes type) { switch (type) { case FALL_DETECTED: if (!mTimerState.equals(TimerState.PENDING)) return; EventBus.getDefault().post(EventTypes.START_ALARM); mTimerState = TimerState.RUNNING; Intent start_app_intent = new Intent(this, MainActivity.class); start_app_intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK); start_app_intent.putExtra(ALARM_STARTED, true); startActivity(start_app_intent); PendingIntent start_app_pending_intent = PendingIntent.getActivity(this, 0, new Intent(this, MainActivity.class), 0); mNotificationBuilder.setContentTitle(getString(R.string.phone_notification_waiting)); // mNotificationBuilder.addAction(android.R.drawable.presence_busy, "Cancel", stopIntent); mNotificationBuilder.setContentIntent(start_app_pending_intent); mNotificationManager.notify(R.string.app_name, mNotificationBuilder.build()); mAlarmTask = getAlarmTask(); mAlarmTask.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR); break; case ALARM_STOPPED: case STOP_ALARM: if (mAlarmTask != null) { mAlarmTask.cancel(true); } break; } } private AsyncTask<Void, Integer, Boolean> getAlarmTask() { return new AsyncTask<Void, Integer, Boolean>() { @Override protected Boolean doInBackground(Void... voids) { for (int i = 0; i <= max; i++) { if (isCancelled()) { return false; } try { Thread.sleep(resolution_second); publishProgress(i); } catch (InterruptedException e) { Log.d("Alarm", "sleep failure"); return false; } } return true; } @Override protected void onProgressUpdate(Integer... values) { super.onProgressUpdate(values); int i = values[0]; if (i % update_frequency == 0) EventBus.getDefault().post(new AlarmEvent(max, i)); mNotificationBuilder.setProgress(max, i, false); mNotificationManager.notify(R.string.app_name, mNotificationBuilder.build()); } @Override protected void onPostExecute(Boolean alarm) { super.onPostExecute(alarm); updateTaskState(alarm); } @Override protected void onCancelled() { super.onCancelled(); updateTaskState(false); } @Override protected void onCancelled(Boolean alarm) { super.onCancelled(alarm); updateTaskState(alarm); } private void updateTaskState(boolean alarm) { mNotificationBuilder = new Notification.Builder(getApplicationContext()) .setPriority(NotificationCompat.PRIORITY_HIGH) .setContentTitle(alarm ? getString(R.string.phone_notification_sent) : getString(R.string.phone_notification_cancelled)) .setAutoCancel(false).setOngoing(true).setSmallIcon(R.drawable.ic_stat_on); mNotificationManager.notify(R.string.app_name, mNotificationBuilder.build()); mTimerState = alarm ? TimerState.ALARM : TimerState.CANCELLED; new Handler().postDelayed(new Runnable() { @Override public void run() { resetNotification(); mAlarmTask = null; } }, WAIT_BEFORE_RESET_PERIOD); } }; } private void resetNotification() { if (mTimerState == TimerState.RUNNING) return; mTimerState = TimerState.PENDING; mNotificationBuilder = new Notification.Builder(getApplicationContext()) .setPriority(NotificationCompat.PRIORITY_HIGH) .setContentTitle(getString(R.string.phone_notification_detecting)).setAutoCancel(false) .setOngoing(true).setSmallIcon(R.drawable.ic_stat_on); mNotificationManager.notify(R.string.app_name, mNotificationBuilder.build()); } public enum TimerState { PENDING, RUNNING, CANCELLED, ALARM, } }