Android how to get "application uptime"?

Question

how can I get my application uptime?

I found this: https://stackoverflow.com/a/6431668/3973591

But i have this error:

D/Error: ERR: file=BaseDexClassLoader.java
D/Error: ERR: class=dalvik.system.BaseDexClassLoader
D/Error: ERR: method=findClass line=56
D/Error: ERR: stack=java.lang.NoClassDefFoundError: Failed resolution of: Ljava/lang/management/ManagementFactory;

Can you help me?

Or do you have another solution?

Did you read the comment there? That's JVM uptime, not an application. — OneCricketeer, Dec 08 '16 at 13:54
And where do you want to know this information? Within the application itself? — OneCricketeer, Dec 08 '16 at 13:55

score 4 · Accepted Answer · edited May 23 '17 at 12:01

4

how i can get my application uptime ?

"Uptime" does not really have a lot of meaning in Android. But, you are welcome to:

Create a subclass of Application
Override onCreate() and make note of the current time (e.g., SystemClock.elapsedRealtime())
Register that custom Application subclass in the manifest, via android:name on the <application> element

Then, your process' uptime is the current time minus the value saved in onCreate().

i found this :https://stackoverflow.com/a/6431668/3973591

That code principally is for Java servers, and that class does not exist on Android.

edited May 23 '17 at 12:01

Community

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answered Dec 08 '16 at 13:54

CommonsWare

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Thank you for your quick response. Already i have Application. Also i think about this. But only we have this solution ? Android does not give you uptime ? – Dec 08 '16 at 14:03
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@Hasan: "Android does not give you uptime ?" -- not that I can think of. Again, it is not a useful metric on Android IMHO. Processes are supposed to come and go as needed. – CommonsWare Dec 08 '16 at 14:04
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There can be a need to track and test uptime, for digital signage or kiosk applications where a single Application is long running – Ian Butler Nov 16 '18 at 04:48

Anm · Answer 2 · 2023-04-10T22:46:38.503

As of API 24, the following were added to Android:

Either of the following should work to provide an application uptime:

val appUptimeMs =  SystemClock.elapsedRealtime() - Process.getStartElapsedRealtime()

val appUptimeMs = SystemClock.uptimeMillis() - Process.getStartUptimeMillis()

If running on a pre-24 device, you will need a store a start time at application startup, as mentioned by CommonsWare.

Android how to get "application uptime"?

2 Answers2