I have a Bound service which collects locations for 3 minutes every 15 minutes. I start a CountDownTimer once the Service is connected in onServiceConnected of ServiceConnection.
I receive all the Timer callbacks (onFinish) (onTick) perfectly as far the Activity which bindService is visible.
When Device is locked I do not receive any updates from the timer.
MyLocationService
public class MyLocationService extends Service implements MyTimerListener{
private IBinder mBinder = new MyLocationBinder();
public void onCreate() {
locationManager = new MyLocationManager(this);
}
#Override
public IBinder onBind(Intent arg0) {
return mBinder;
}
public class MyLocationBinder extends Binder
{
public MyLocationService getService()
{
return MyLocationService.this;
}
}
public void startFetchingLocations()
{
if(locationManager != null){
locationManager.startFetchingLocations();
if(publishPeriodCountDownTimer != null) {
publishPeriodCountDownTimer.cancel();
publishPeriodCountDownTimer = null;
}
publishPeriodCountDownTimer = new MyCountTimer(gpsPublishPeriod * 60 * 1000, 1000, MyLocationService.this);
publishPeriodCountDownTimer.start();
}
}
#Override
public void onTimeFinished() {
//Start fetching locations
locationManager.startFetchingLocations(); //Start 3 min CountdownTimer
}
#Override
public void onTick() {
}
public void onAllLocationsRecieved(ArrayList<Location> locations)
{
//Do stuff on Locations
locationManager.stopFetchingGPS(); //Stops 3 min countdownTimer
}
}
MyActivty
public class MyActivity
{
#Override
protected void onStart() {
super.onStart();
btnStop.setVisibility(View.VISIBLE);
MyNoificationManager.cancelAllNotifications();
if (!isLocationServiceBound) {
Intent locServiceIntent = new Intent(this, MyLocationService.class);
bindService(locServiceIntent, locationServiceConnection, Context.BIND_AUTO_CREATE);
}
}
private ServiceConnection locationServiceConnection = new ServiceConnection(){
#Override
public void onServiceDisconnected(ComponentName name) {
isLocationServiceBound = false;
}
#Override
public void onServiceConnected(ComponentName name, IBinder service) {
MyLocationBinder locationBinder = (MyLocationBinder) service;
locationService = locationBinder.getService();
isLocationServiceBound = true;
locationService.startFetchingLocations();
}
};
}
It works as expected when the Activity is visible. The timer doesn't provide any onTick() or onTimeFinished() callbacks when the device is locked.
What could be the problem here ?
The CountDownTimer will not work when the phone goes to sleep mode. This is by design and it's to save battery life.
Alternately you can use android.app.AlarmManager instead to achieve your goal. Following is the sample code how to do that. Set the alaram like below
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(this, MyLocationService.class);
intent.putExtra("need_to_fetch_loc", true);
PendingIntent alarmIntent = PendingIntent.getBroadcast(this, 0, intent, 0);
alarmManager.set(AlarmManager.RTC_WAKEUP, gpsPublishPeriod * 60 * 1000, alarmIntent);
Add the following method to your MyLocationService class
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
if(locationManager!= null && intent.getBooleanExtra("need_to_fetch_loc", false))
{
locationManager.startFetchingLocations();
}
return super.onStartCommand(intent, flags, startId);
}
Related
Here I attached my code,I created a service which runs both cases while my app is in background and killed state. It is not running on android marshmallow devices, but it works on other devices. When I check other devices, Log will be executed when the app is kill state, only version 6 , not executed.
public class SensorService extends Service {
public int counter=0;
public SensorService(Context applicationContext) {
super();
Log.e("HERE", "here I am!");
}
public SensorService() {
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
startTimer();
return START_STICKY;
}
When comes to destroy again I will call the service, It will go to broadcast receive, and then start service function will call.
#Override
public void onDestroy() {
super.onDestroy();
Log.e("EXIT", "ondestroy!");
Intent broadcastIntent = new Intent("sales.com.ActivityRecognition.RestartSensor");
sendBroadcast(broadcastIntent);
stoptimertask();
}
private Timer timer;
private TimerTask timerTask;
long oldTime=0;
public void startTimer() {
timer = new Timer();
initializeTimerTask();
timer.schedule(timerTask, 1000, 1000); //
}
public void initializeTimerTask() {
timerTask = new TimerTask() {
public void run() {
Log.e("in timer", "in timer ++++ "+ (counter++));
}
};
}
public void stoptimertask() {
//stop the timer, if it's not already null
if (timer != null) {
timer.cancel();
timer = null;
}
}
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
Below code for Broadcast Receiver code : app works, when i click back button, if the app was killed state, it is not working, other devices services running.
public class SensorRestarterBroadcastReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Log.e(SensorRestarterBroadcastReceiver.class.getSimpleName(), "Service Stops! Oooooooooooooppppssssss!!!!");
// context.startService(new Intent(context, SensorService.class));
Intent i = new Intent(context, SensorService.class);
context.startService(i);
}
}
I have an app that creates a never ending background service. The service is started when the app is launched. When the app is killed (e.g. by the user), the service sends a broadcast request that will restart it after it is killed.
The question is: when I restart the app, how can I know if the service is already running?
Naively I had thought that by restarting the service when the app is re-launched it would have stopped the existing service but this does not happen. The following code shows that if I do this, there are two services running at the same time (the printout in the timer moves from every second to every half a second).
Many thanks
public class MainActivity extends AppCompatActivity {
static Intent mServiceIntent;
private SensorService mSensorService;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
ctx=this;
setContentView(R.layout.activity_main);
mSensorService= new SensorService(getCtx());
mServiceIntent = new Intent(getCtx(), mSensorService.getClass());
startService(mServiceIntent);
}
Context ctx;
public Context getCtx() {
return ctx;
}
#Override
protected void onDestroy() {
stopService(mServiceIntent);
Log.i("MAINACT", "onDestroy!");
super.onDestroy();
}
}
public class SensorService extends Service {
public int counter=0;
public SensorService(Context applicationContext) {
super();
Log.i("HERE", "here I am!");
}
public SensorService() {
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
super.onStartCommand(intent, flags, startId);
startTimer();
return START_STICKY;
}
private Timer timer;
private TimerTask timerTask;
long oldTime=0;
public void startTimer() {
//set a new Timer
timer = new Timer();
//initialize the TimerTask's job
initializeTimerTask();
//schedule the timer, to check if the service is there in 25s
timer.schedule(timerTask, 1000, 1000); //
}
/**
* it sets the timer to check in x seconds if the sensorsService is active. If not it will start the service
*/
public void initializeTimerTask() {
timerTask = new TimerTask() {
public void run() {
long time= System.currentTimeMillis();
Log.i("in timer", "in timer ++ "+(time-oldTime)+" ++ "+ (counter++));
oldTime= time;
}
};
}
/**
* not needed
*/
public void stoptimertask() {
//stop the timer, if it's not already null
if (timer != null) {
timer.cancel();
timer = null;
}
}
#Override
public void onDestroy() {
super.onDestroy();
Log.i("EXIT", "ondestroy!");
Intent broadcastIntent = new Intent("uk.ac.shef.oak.ActivityRecognition.RestartSensor");
sendBroadcast(broadcastIntent);
stoptimertask();
}
#Nullable
#Override
public IBinder onBind(Intent intent) {
return null;
}
}
public class SensorRestarterBroadcastReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Log.i(SensorRestarterBroadcastReceiver.class.getSimpleName(), "Service Stops! Oooooooooooooppppssssss!!!!");
context.startService(new Intent(context, SensorService.class));;
}
}
private boolean isMyServiceRunning(Class<?> serviceClass) {
ActivityManager manager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE);
for (RunningServiceInfo service : manager.getRunningServices(Integer.MAX_VALUE)) {
if (serviceClass.getName().equals(service.service.getClassName())) {
return true;
}
}
return false;
}
And then use
isMyServiceRunning(MyService.class)
Credit
I'm new to services and BroadcastReceiver so maybe this question is newbie, but I didn't found the solution for my question after a long search on the web.
I need to run a CountDownTimer inside service, so the time keep moving even the application was finished.
In my code I based on THIS EXAMPLE.
My code works fine, but after the application is finished the CountDownTimer stopped(The service doesn't destroyed, just the timer).
I tried to implement it in different ways, but nothing works for me.
This is the part of my code that relevant:
AlarmReciver:
public class AlarmReceiver extends BroadcastReceiver {
#Override
public void onReceive(Context context, Intent intent) {
Intent background = new Intent(context, BackgroundService.class);
Bundle bundle = intent.getExtras();
background.putExtra("time", bundle.getInt("time"));
context.startService(background);
}
}
BackgroundService :
public class BackgroundService extends Service {
private final static String TAG = "BroadcastService";
private CountDownTimer cdt = null;
private Bundle bundle;
private boolean isRunning;
private Context context;
private int timeInMili;
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public void onCreate() {
this.context = this;
this.isRunning = false;
}
#Override
public void onDestroy() {
//cdt.cancel();
Log.i(TAG, "Timer cancelled");
super.onDestroy();
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
bundle = intent.getExtras();
timeInMili = bundle.getInt("time");
if(!this.isRunning) {
this.isRunning = true;
}
cdt = new CountDownTimer(timeInMili, 1000) {
#Override
public void onTick(long millisUntilFinished) {
Log.i(TAG, "Countdown seconds remaining: " + millisUntilFinished / 1000);
}
#Override
public void onFinish() {
Log.i(TAG, "Timer finished");
stopSelf();
}
};
cdt.start();
return START_STICKY;
}
}
MainActivity (extends FragmentActivity):
public void StartBackgroundAlarm(int timeInMili)
{
Intent alarm = new Intent(this, AlarmReceiver.class);
alarm.putExtra("time", timeInMili);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this, 0, alarm, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime(), pendingIntent);
}
MANIFEST :
<service android:enabled="true" android:name= "com.MES.yo.servicemanager.BackgroundService" />
<receiver android:name="com.MES.yo.servicemanager.AlarmReceiver"></receiver>
I want to close the service when user removes the app from current running app list. Here, what I'm doing, when user starts the app, service gets started and remain in progress. But when user removes the app via swipe, new service is being created. I want to close the service. Below is my code.
// Start service using AlarmManager
Calendar cal = Calendar.getInstance();
cal.add(Calendar.SECOND, 10);
Intent intent = new Intent(this, MyService.class);
PendingIntent pintent = PendingIntent.getService(this, 0, intent, 0);
AlarmManager alarm = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarm.setRepeating(AlarmManager.RTC_WAKEUP, cal.getTimeInMillis(),
5000, pintent);
startService(new Intent(getBaseContext(), MyService.class));
MyService.java
import android.app.Service;
import android.content.Intent;
import android.os.IBinder;
import android.widget.Toast;
public class MyService extends Service {
int count = 0;
public MyService() {
}
#Override
public IBinder onBind(Intent intent) {
// TODO: Return the communication channel to the service.
throw new UnsupportedOperationException("Not yet implemented");
}
#Override
public void onCreate() {
Toast.makeText(this, "The new Service was Created", Toast.LENGTH_LONG).show();
}
#Override
public void onStart(Intent intent, int startId) {
// For time consuming an long tasks you can launch a new thread here...
count++;
Toast.makeText(this, " Service Started" + " " + count, Toast.LENGTH_LONG).show();
}
#Override
public void onDestroy() {
Toast.makeText(this, "Service Destroyed", Toast.LENGTH_LONG).show();
}
}
According with google's employee Dianne Hackborn explains in a comment on one of her Google+ posts, you have to implemente the onTaskremoved on your service.
[W]hat specifically happens when you swipe away a recent task is it:
(1) kills any background or empty processes of the application (see
http://developer.android.com/guide/topics/fundamentals/processes-and-threads.html#Lifecycle
for what this means), and (2) uses the new
http://developer.android.com/reference/android/app/Service.html#onTaskRemoved(android.content.Intent)
API to tell any services of the application about the task being
removed so it can do whatever it thinks is appropriate.
So I think you can do it this way: In that callback you have to stop the service, and tell the alarm manager to stop starting it again. For that, first of all, you need to pass to the service the pending intent that you use with the AlarmManger, so the service can use the intent to cancel the schedule.
At least, you need all this:
In your service
public class MyService extends Service {
private DefaultBinder mBinder;
private AlarmManager alarmManager ;
private PendingIntent alarmIntent;
private void setAlarmIntent(PendingIntent alarmIntent){
this.alarmIntent=alarmIntent;
}
public void onCreate() {
alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
mBinder = new DefaultBinder(this);
}
#Override
public IBinder onBind(Intent intent) {
return mBinder;
}
public void onTaskRemoved (Intent rootIntent){
alarmManager.cancel(alarmIntent);
this.stopSelf();
}
}
Then in other file, you create DefaultBinder Class
public class DefaultBinder extends Binder {
MyService s;
public DefaultBinder( MyService s) {
this.s = s;
}
public MyService getService() {
return s;
}
}
in your activity
MyService service;
protected ServiceConnection mConnection = new ServiceConnection() {
public void onServiceConnected(ComponentName className, IBinder binder) {
service = ((DefaultBinder) binder).getService();
service.setAlarmIntent(pIntent);
}
public void onServiceDisconnected(ComponentName className) {
service = null;
}
};
protected void onResume() {
super.onResume();
bindService(new Intent(this, MainService.class), mConnection,
Context.BIND_AUTO_CREATE);
}
#Override
protected void onStop() {
super.onStop();
if (mConnection != null) {
try {
unbindService(mConnection);
} catch (Exception e) {}
}
}
I am building an android app and when it is running I need to make a call to the my web server at each minute if the user is connected to a certain network.
I plan to use a service to make that call but how do I call it at each minute?.
I think i need to use alaarm manager but where do I initalize it? in my start activity? I only need to execute the service when my app is running.
Thanks for your help.
If you want to call server only if app is running then no need to use alarm manager. there are other options like
CoundDownTimer
Thread
I prefer CoundownTimer in that scenario and you can use like this
CountDownTimer countDownTimer = new CountDownTimer(1000000, 60 * 1000) {
#Override
public void onTick(long millisUntilFinished) {
// Do something on a tick.
}
#Override
public void onFinish() {
// Do something, maybe?
this.start();
}
};
countDownTimer.start();
Try this ::
You can call this timer in your activity where you want it
private Timer autoUpdate;
#Override
public void onResume() {
super.onResume();
autoUpdate = new Timer();
autoUpdate.schedule(new TimerTask() {
#Override
public void run() {
runOnUiThread(new Runnable() {
public void run() {
//call your service from here
}
});
}
}, 0, 60000);//set time interval according to your requirement
}
Feel free to ask if you have any query :)
in Activity:
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
TestAlarmMessageReceiver almesr = new TestAlarmMessageReceiver(this, time);
}
BroadcastReceiver:
public class TestAlarmMessageReceiver extends BroadcastReceiver {
public TestAlarmMessageReceiver() {
}
public TestAlarmMessageReceiver(Context context, int timeout) { //timeout in seconds
AlarmManager alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent intent = new Intent(context, TestAlarmMessageReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0, intent,
PendingIntent.FLAG_CANCEL_CURRENT);
Calendar time = Calendar.getInstance();
time.setTimeInMillis(System.currentTimeMillis());
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, time.getTimeInMillis(),
timeout*60*1000, pendingIntent);
}
#Override
public void onReceive(Context arg0, Intent arg1) {
arg0.startService(new Intent(arg0, TestMessageService.class));
}
}
Service:
public class TestMessageService extends Service {
#Override
public IBinder onBind(Intent intent) {
return null;
}
#Override
public int onStartCommand(Intent intent, int flags, int startId) {
messageUpdateTask();
return super.onStartCommand(intent, flags, startId);
}
private void messageUpdateTask(){
GetMessagesUpdateAsyncTak getMessUpd = new GetMessagesUpdateAsyncTak();
getMessUpd.execute(this);
}
}
Call your web server using AsynTask http://developer.android.com/reference/android/os/AsyncTask.html
In onPost method in AsynTask class wait for one minute and call AsynTask.
You can call AsynTask by using below code :
BLSyncingProcedure objSyncingProcedure=new BLSyncingProcedure();
objSyncingProcedure.execute(HomeScreen.this);
BLSyncingProcedure is your AsynTask class name.