/**
*
* Funf: Open Sensing Framework
* Copyright (C) 2010-2011 Nadav Aharony, Wei Pan, Alex Pentland.
* Acknowledgments: Alan Gardner
* Contact: nadav@media.mit.edu
*
* This file is part of Funf.
*
* Funf is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* Funf 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Funf. If not, see <http://www.gnu.org/licenses/>.
*
*/
package edu.mit.media.funf.probe.builtin;
import java.math.BigDecimal;
import java.util.List;
import android.app.ActivityManager;
import android.app.ActivityManager.RecentTaskInfo;
import android.content.Context;
import android.os.PowerManager;
import android.util.Log;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import edu.mit.media.funf.Schedule;
import edu.mit.media.funf.config.Configurable;
import edu.mit.media.funf.config.RuntimeTypeAdapterFactory;
import edu.mit.media.funf.json.IJsonObject;
import edu.mit.media.funf.probe.Probe.Base;
import edu.mit.media.funf.probe.Probe.ContinuousProbe;
import edu.mit.media.funf.probe.Probe.Description;
import edu.mit.media.funf.probe.Probe.DisplayName;
import edu.mit.media.funf.probe.Probe.PassiveProbe;
import edu.mit.media.funf.probe.Probe.RequiredPermissions;
import edu.mit.media.funf.probe.builtin.ProbeKeys.RunningApplicationsKeys;
import edu.mit.media.funf.time.TimeUtil;
import edu.mit.media.funf.util.LogUtil;
@DisplayName("Running Applications")
@Description("Emits the applications the user is running using a polling method.")
@RequiredPermissions(android.Manifest.permission.GET_TASKS)
@Schedule.DefaultSchedule(interval=0, duration=0.0, opportunistic=true)
public class RunningApplicationsProbe extends Base implements ContinuousProbe, PassiveProbe, RunningApplicationsKeys {
@Configurable
private double pollInterval = 1.0;
// Used as the flag for polling vs paused
private PowerManager pm;
private class RunningAppsPoller implements Runnable {
private RecentTaskInfo currentRunningTask = null;
private BigDecimal currentRunningTaskStartTime = null;
@Override
public void run() {
if (am != null) {
List<RecentTaskInfo> currentTasks = am.getRecentTasks(1, ActivityManager.RECENT_WITH_EXCLUDED);
if (!currentTasks.isEmpty()) {
RecentTaskInfo updatedTask = currentTasks.get(0);
if (currentRunningTask == null || !currentRunningTask.baseIntent.filterEquals(updatedTask.baseIntent)) {
endCurrentTask();
currentRunningTask = updatedTask;
currentRunningTaskStartTime = TimeUtil.getTimestamp();
}
}
getHandler().postDelayed(this, TimeUtil.secondsToMillis(pollInterval));
}
}
public void endCurrentTask() {
if (currentRunningTask != null && currentRunningTaskStartTime != null) {
BigDecimal duration = TimeUtil.getTimestamp().subtract(currentRunningTaskStartTime);
sendData(currentRunningTask, currentRunningTaskStartTime, duration);
reset();
}
}
public void reset() {
currentRunningTask = null;
currentRunningTaskStartTime = null;
}
}
private void sendData(RecentTaskInfo taskInfo, BigDecimal timestamp, BigDecimal duration) {
Gson gson = getGson();
JsonObject data = new JsonObject();
data.add(TIMESTAMP, gson.toJsonTree(timestamp));
data.add(DURATION, gson.toJsonTree(duration));
data.add(TASK_INFO, gson.toJsonTree(taskInfo));
sendData(data);
}
private ActivityManager am;
private RunningAppsPoller runningAppsPoller = new RunningAppsPoller();
private DataListener screenListener = new DataListener() {
@Override
public void onDataReceived(IJsonObject completeProbeUri, IJsonObject data) {
Log.d(LogUtil.TAG, "RunningApplications: " + data);
String type = completeProbeUri.get(RuntimeTypeAdapterFactory.TYPE).getAsString();
if (ScreenProbe.class.getName().equals(type)) {
boolean screenOn = data.get(ScreenProbe.SCREEN_ON).getAsBoolean();
if (screenOn) {
onContinue();
} else {
onPause();
}
}
}
@Override
public void onDataCompleted(IJsonObject completeProbeUri, JsonElement checkpoint) {
// Shuts this down if something unregisters the listener
disable();
}
};
@Override
protected synchronized void onEnable() {
super.onEnable();
Log.d(LogUtil.TAG, "RunningApplicationsProbe: onEnable");
pm = (PowerManager) getContext().getSystemService(Context.POWER_SERVICE);
}
@Override
protected void onStart() {
super.onStart();
Log.d(LogUtil.TAG, "RunningApplicationsProbe: onStart");
getGson().fromJson(DEFAULT_CONFIG, ScreenProbe.class).registerListener(screenListener);
if (pm.isScreenOn()) {
onContinue();
}
}
protected void onContinue() {
if (State.RUNNING.equals(getState()) && am == null) {
Log.d(LogUtil.TAG, "RunningApplicationsProbe: onContinue");
am = (ActivityManager)getContext().getSystemService(Context.ACTIVITY_SERVICE);
getHandler().post(runningAppsPoller);
}
}
protected void onPause() {
if (am != null) {
Log.d(LogUtil.TAG, "RunningApplicationsProbe: onPause");
am = null;
getHandler().removeCallbacks(runningAppsPoller);
runningAppsPoller.endCurrentTask();
}
}
@Override
protected void onStop() {
super.onStop();
onPause();
getGson().fromJson(DEFAULT_CONFIG, ScreenProbe.class).unregisterListener(screenListener);
}
@Override
protected void onDisable() {
super.onDisable();
Log.d(LogUtil.TAG, "RunningApplicationsProbe: onDisable");
runningAppsPoller.reset();
}
protected boolean isWakeLockedWhileRunning() {
return false;
}
}