Which computer is eating all the bandwidth?

Question

How can I use AlarmManager to call a specific method of an Activity, in my case I need to stop a service by calling KillMyServer method of my Activity 2 hours later from know. I can't use Timer or postDelayed, because if an app goes to background Android may close it after a while, but AlarmManager will survive.

Solution

See the overview for ntop

• Analyse IP traffic and sort it according to the source/destination
• Display IP Traffic Subnet matrix (who's talking to who?)

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EDIT

Ntop can show traffic statistics between other PCs and the internet, you just have to make sure the computer running ntop is able to see all the traffic. Modern ethernet switches segregate traffic so the a computer only sees traffic addressed to it. A managed switch will allow you to set up port-mirroring to the computer running ntop.

It seems the Belkin's built-in switch doesn't support Port-mirroring. Maybe you could interpose a suitable inexpensive switch between the Belkin and the four wired PCs.

Old ethernet hubs (not switches) also allow any computer to see all traffic. I have an old Netgear EN104 10-Base-T hub I used to use for this. I see they are available for a few dollars

See ntop blog about this

If the PCs are on the WLAN you'll need a different solution. http://www.tech-faq.com/how-to-monitor-wireless-traffic.html

There are commercial products that claim to do this. E.g. http://www.tamos.com/products/commwifi/

If the Belkin F5D7632-4 supported RMON or Netflow, you might be able to use that.

Comments

[Arjan]

Related: How to monitor bandwidth use of each device on wifi network and How can I monitor internet usage in my network?

[Mick]

The first question has one answer which is linux based software... my two PC's have windows XP and windows 7.

[Squonk]

Why would you use an Activity to do this? The Android Activity class is designed to be a UI framework to allow direct interaction between the user and your app. It's not a general 'workhorse' class.

[user5249203]

Comments moved to edited Answer above.

[AVEbrahimi]

Because if an app goes to background Android may close it after a while, but AlarmManager will survive.

[Gopal Gopi]

if app goes to background, Activities may be closed, but Service will survive until low memory situations (rare to be happened). so you can write Handler code in Service

[AVEbrahimi]

I need to start kill timer right after app goes to background. How can I add this to service?

[Gopal Gopi]

bind the service to the Activity and start kill timer in Service from onStop() of Activity

[AVEbrahimi]

I did same, but kill timer won't survive for hours, but only about 1 hour!