B4A Library OS Library

XverhelstX · Sep 2, 2011

Hello everyone,

I present you thé OS Lib. aka. the Operating System Library.:sign0025:
This 'giant' library has around 60+ commands.
Everything is explained in the library itself.

What does it cover:

- Memory size of directories
- Tons of hardware strings (e.g model, device, host, ...)
- A unique, very easy countdown timer with 2 events (easier than timer :sign0103:

B4X:

Dim OS As OperatingSystem
OS.Initialize("OS")
OS.CountDownTimer(1000)

Sub OS_ontick (ms as long)
       toastmessageshow(ms,false)
end sub

Sub OS_onfinish (OS As String)
   Msgbox(OS,"OS Library") 'get the secret message in here ;)
End Sub

- CPU information
- Running services, tasks, sending signals
- Rebooting (and wiping data)
- and a lot more!

Note that it is still in beta and errors may still occur. ( I haven't tested all functions yet.)
Please tell it here when, why, what, etc happened.
It is also possible that I didn't add a certain permission as I can't find them always.

I like feedback as it gives me more motivation.
(now go and make your own task killer :^))

Cheerz!
Tomas

GMan · May 16, 2014

Is there any brief description of the library without browsing the lib itself with an XML-Editor ?

cncncn · May 22, 2014

Hi,

I want to kill adobe reader so i get PID of Adobe then i use this :

B4X:

Dim closeadobe as OperatingSystem
closeadobe.killprocess(144287)

Is there any special permissions beacause it doesn't works

Erel · May 22, 2014

Killing other processes doesn't work on most devices.

cncncn · Jun 2, 2014

killprocessus doesn't works on my tablet samsung galaxy tab 3 gt-n8010 for adobe reader

GMan · Jun 2, 2014

Erel said:
Killing other processes doesn't work on most devices.

And thats the reason why most of the "Task Managers" dont work at the Point: Clean or Kill process

hleclercq · Sep 21, 2014

Please
Could you add the presence of a ExtSdCard
Thanks

Erel · Sep 28, 2014

Try this method:

B4X:

Sub GetFreeMemory As Long
   Dim jo As JavaObject
   Return jo.InitializeStatic("java.lang.Runtime").RunMethodJO("getRuntime", Null).RunMethod("totalMemory", Null)
End Sub

http://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html#totalMemory()

westingenieria · Oct 1, 2014

XverhelstX said:
Thanks a lot Erel!
Here's some example code:

B4X:

Msgbox(OS.AvailableExternalMemorySize,OS.AvailableInternalMemorySize) Msgbox(OS.AvailableMemory,OS.Board) Msgbox(OS.CPUABI,OS.Host) Msgbox(OS.myPid,OS.myTid) Msgbox(OS.RunningAppProcesses,"Processes") Msgbox(OS.ReadCPUinfo,"Processes") Msgbox(OS.RunningAppProcess,OS.Time) Msgbox(OS.formatSize(256),"FormatSize") Msgbox(OS.getRunningServices(10),"Running Services") Msgbox(OS.getRunningTasks(10),"Running Tasks") OS.killProcess(OS.myPid)

It works, however, I still have a question:

Using this:

B4X:

Msgbox(OS.RunningAppProcesses,"Processes")

I receive the following information:

How can I 'interpretate' this?
Is it possible to get names, etc out of it?

Thanks

XverhelstX

hi, Is it possible to get names, etc out of it?

B4X:

os.RunningAppProcesses()

...
how?

westingenieria · Oct 1, 2014

os.RunningAppProcessInfo works for me. thanks

Baltazar · Oct 1, 2014

XverhelstX said:
Updated to 1.4.
I hope this is what you are after Cableguy.

Includes:
- density: The logical density of the display.
- densityDpi: The screen density expressed as dots-per-inch.
- heightPixels: The absolute height of the display in pixels.
- scaledDensity: A scaling factor for fonts displayed on the display.
- widthPixels: The absolute width of the display in pixels.
- xdpi :The exact physical pixels per inch of the screen in the X dimension.
- ydpi :The exact physical pixels per inch of the screen in the Y dimension.

I also added physicalScreenWidth and physicalScreenHeight.
= xdpi * widthPixels and ydpi * heightPixels.

Tomas

Fantastic work XverhelstX ! These were just the ones I was about to ask. . Thank you!

NeoTechni · Jan 10, 2015

I want to use SetThreadPriority
How do I get the threadID ?

boralogy · Mar 15, 2015

can't get battery level could you help me? it returns NULL

B4X:

Sub Globals
    'These global variables will be redeclared each time the activity is created.
    'These variables can only be accessed from this module.
Dim ag As OperatingSystem
    Private bat_lvl As Label
    Private Label1 As Label
   
End Sub

Sub Activity_Create(FirstTime As Boolean)
    'Do not forget to load the layout file created with the visual designer. For example:
    Activity.LoadLayout("low_main")
   
bat_lvl.Text=ag.BatteryLevel




End Sub

NeoTechni · Mar 15, 2015

I'd just use phone events for it.

wonder · Mar 9, 2016

Hello!

B4X:

Error serving request: (SecurityException) java.lang.SecurityException: Neither user 10165 nor current process has android.permission.REBOOT.

Adding the permission "android.permission.REBOOT" doesn't solve it.
How can I reboot? The device is rooted, by the way.

BarryW · Apr 5, 2016

XverhelstX said:
Hello everyone,

I present you thé OS Lib. aka. the Operating System Library.:sign0025:
This 'giant' library has around 60+ commands.
Everything is explained in the library itself.

What does it cover:

- Memory size of directories
- Tons of hardware strings (e.g model, device, host, ...)
- A unique, very easy countdown timer with 2 events (easier than timer :sign0103:

B4X:

Dim OS As OperatingSystem OS.Initialize("OS") OS.CountDownTimer(1000) Sub OS_ontick (ms as long) toastmessageshow(ms,false) end sub Sub OS_onfinish (OS As String) Msgbox(OS,"OS Library") 'get the secret message in here ;) End Sub

- CPU information
- Running services, tasks, sending signals
- Rebooting (and wiping data)
- and a lot more!

Note that it is still in beta and errors may still occur. ( I haven't tested all functions yet.)
Please tell it here when, why, what, etc happened.
It is also possible that I didn't add a certain permission as I can't find them always.

I like feedback as it gives me more motivation.
(now go and make your own task killer :^))

Cheerz!
Tomas

Hi!

i try to use

B4X:

Dim OS As OperatingSystem : OS.Initialize("OS")
Dim ProcessName, PIDs, NamePIDs, RunningApps As List
ProcessName.Initialize : PIDs.Initialize : NamePIDs.Initialize : RunningApps.Initialize
RunningApps = OS.RunningAppProcessInfo(ProcessName, PIDs, NamePIDs)

Can we turn off the logs of process list... Tnx

B4A Library OS Library

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