Question

I use the timer schedule method to send location information to the db every 5 min.

Here is the code:

public void onStart(Intent intent, int startId) 
{
    this.timer.schedule(new Send(), new Date(), TEN_SECONDS*6*5); //ten_seconds = 10000
}

class Send extends TimerTask
{
    public void run()
    {
        String address = LocationService.this.address;
        new SendLocation(LocationService.this.id,address); // a thread that sends the info to the db
        LocationService.this.gpsLocation = null;
        LocationService.this.networkLocation = null;
    }
}

But how come that my db has locations with 7/6 minute diffrence?
The sendLocation checks if the location that i’m going to send to the db is the same as the last one, if true ignore the location else send it.

Which means that the diffrence between each location in my db should be in jump of 5 minute.

Answer 1

There is no guarantee your TimerTasks will be executed exactly when you request. From the Timer docs —

Each timer has one thread on which tasks are executed sequentially.
When this thread is busy running a task, runnable tasks may be subject
to delays.

and

This class does not offer guarantees about the real-time nature of
task scheduling

Granted, two minutes is a long time, so there might be delays elsewhere.