Is there any event or way exists in android to check if memory is low?

Question

friends,

any one guide me if there is any event of useful way exits in android to know if my android application is running in low memory?

actually , i am caching many objects so i want to know a central place or area where i could release them if memory is low.

any help would be appreciated.

you should change your accepted answer, mine is actually wrong -- application-wise. — bigstones, Feb 12 '14 at 17:59

score 13 · Answer 1 · edited May 23 '17 at 11:51

Contrary to what @bigstones says, onLowMemory() doesn't exactly do what you would expect. My understanding of this call is that it is only reached when the system is low on memory and asks your application to free extra memory. onLowMemory() will never be called when the system has plenty of memory, but your app has reached its memory limit.

It's also a bad idea to try/catch the OutOfMemory exceptions. If you want to know your own app's memory usage, the best way to get it is via the ActivityManager class, namely in the getMemoryClass() and getProcessMemoryInfo() methods.

Also, you should read this SO answer (from an Android engineer), which explains process memory use in a much more detailed way.

score 2 · Accepted Answer · edited May 23 '17 at 11:51

2

yes, see onLowMemory(), Activity and others implement this.

edit: this is actually wrong, application-wise. See Nik Reiman's answer.

edited May 23 '17 at 11:51

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answered Jan 20 '11 at 14:27

bigstones

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where to mention it? if i want to use it as a commonly? in my application? any idea – UMAR-MOBITSOLUTIONS Jan 28 '11 at 11:07
@UMAR maybe implementing it in a custom `Application` class. (sorry for late answer) – bigstones Mar 18 '11 at 14:31

score 1 · Answer 3 · answered Dec 19 '13 at 06:12

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OnLowMemory() only gets called when the system is running out of memory so with that you can implement following methods to check available memory before you decode the images.

Runtime.getRuntime().maxMemory();
Runtime.getRuntime().totalMemory();
Runtime.getRuntime().freeMemory();

answered Dec 19 '13 at 06:12

This is a great hidden gem. i haven't seen it anywhere else yet `Runtime.getRuntime().freeMemory();` gives me the actual bytes the OOM's reference to have free unlike all the others. – P Fuster Feb 20 '19 at 11:11

Is there any event or way exists in android to check if memory is low?

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