Android: How much memory is my app using?

Question

Memory seems to be a big topic and I cant find the specific answer. I've got the answers on how much is available in the heap and I know how much should I use. I need the answer how to code to programatically determine how much memory is my app using of the heap? And how much total memory am I using?

Look at http://stackoverflow.com/questions/2298208/how-to-discover-memory-usage-of-my-application-in-android and http://kohlerm.blogspot.in/2009/04/analyzing-memory-usage-off-your-android.html — user370305, Jul 09 '12 at 06:03

score 3 · Accepted Answer · edited Dec 18 '12 at 04:52

3

This works:

  Debug.MemoryInfo memoryInfo = new Debug.MemoryInfo();
  Debug.getMemoryInfo(memoryInfo);

  String memMessage = String.format("App Memory: Pss=%.2f MB\nPrivate=%.2f MB\nShared=%.2f MB",
  memoryInfo.getTotalPss() / 1024.0,
  memoryInfo.getTotalPrivateDirty() / 1024.0,
  memoryInfo.getTotalSharedDirty() / 1024.0);

  Toast.makeText(this,memMessage,Toast.LENGTH_LONG).show();
  Log.i("log_tag", memMessage);

edited Dec 18 '12 at 04:52

Manoj

3,947
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answered Jul 12 '12 at 05:21

user1445716

442
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Why the division by 1024? Acording to Android Docs the results are in kB (multiple of 1000) and NOT in KB or KIB. https://developer.android.com/reference/android/os/Debug.MemoryInfo.html https://en.wikipedia.org/wiki/Kilobyte – chris Dec 23 '17 at 03:11

score 2 · Answer 2 · answered Jul 09 '12 at 06:17

use top -d 1 -n 1 Android Shell Command for getting all process list with process names or used memory by processes and then extract your process info from return string from System:

BufferedReader in = null;

        try {
            Process process = null;
            process = Runtime.getRuntime().exec("top -n 1 -d 1");

            in = new BufferedReader(new 
            InputStreamReader(process.getInputStream()));

            String line ="";
            String content = "";

            while((line = in.readLine()) != null) {
                content += line + "\n";
            }
            System.out.println(content);

        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        finally {
            if(in != null) {
                try {
                    in.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
        }

you will get String as:

PID  PPID USER   STAT VSZ  %MEM  %CPU COMMAND
9673 9672 root    R   712   0.1   0.0 top -d 1 -n 1
2489 2386 system  S   369m  87.7  0.0 system_server
3101 2386 app_23  S   304m  72.3  0.0 com.android.browser
2581 2386 radio   S   279m  66.3  0.0 com.android.phone
2585 2386 app_15  S   271m  64.4  0.0 com.android.launcher

I dont understand what %mem numbers you are showing as an expected output. — user1445716, Jul 09 '12 at 08:07
@user1445716 : %MEM means memory used by a process for example `com.android.browser` currently using 72.3 memory and com.android.launcher currently using 64.4 — ρяσѕρєя K, Jul 09 '12 at 08:11
@user1445716 : but i'm not sure 87.7,72.3 values in % or any other format so i think you can google for it — ρяσѕρєя K, Jul 09 '12 at 08:13
But 72.3% + 87.7% is greater than 100%... Thats what I dont under stand what the value means. I guess I am looking for what the app is currently using on the heap. I know what is available on the heap, and I know what I should use, the piece missing is what am I currently using on the heap? — user1445716, Jul 09 '12 at 08:16

Android: How much memory is my app using?

2 Answers2