Android : Profiling Bitmap Memory Usage To Optimize?
Jan 15, 2010
My game - Tower Raiders - is continually floating fairly close to running out of bitmap memory. Unfortunately, I haven't found good information on profiling bitmap memory usage so that I can optimize / make informed decisions / add new content if it allows / etc.
I'm aware that bitmap memory is not heap memory, as it's allocated natively. But that it is accounted for somehow in the VM and influences garbage collection. Maybe it's an oversimplification of how bitmap memory works - but I'd like to find a tool etc or some way of determining I as the game is running right now, there are no more than X bytes of usable bitmap memory remaining.
So, if anyone has any advice etc that would help me in these respects I would greatly like to hear about a workflow for this.
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Feb 4, 2009
I've been running Eclipse on Mac OS X for android development. Since I'm new to eclipse I'm not sure how to profile my apps. Especially Memory usage. Could some one guide me to a direction please?
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Aug 23, 2010
How do I find out how much memory my openGL application is using at any given moment, including sounds, textures, and everything else? I've been wrestling with DDMS for hours and all it seems to show me is basic object allocation counts. I must be missing something, but I haven't had any luck searching. LONG VERSION: I've got an otherwise operational beta Android game which crashes out after a while on my device (Droid X). I'm fairly sure my problem is that my textures are not being properly cleared from memory. I'd like to confirm this fact before I start blindly making changes. My game does fairly frequent level transitions. During these transitions I typically dump a texture file, wait a bit, then load a new one.
Over time the application performance degrades. After 10 or so transitions frame rate starts to take a nose dive. 10 or so more and it usually dies. Prior to dying I see log messages like this: 08-23 12:26:58.038: DEBUG/Cursor(1265): fillWindow is not executed because Cursor object is closed. 08-23 12:27:27.186: INFO/ActivityManager(1239): Low Memory: No more background processes. And then eventually: 08-23 12:27:46.952: INFO/ActivityManager(1239): Process com.thup.lunchbox (pid 4927) has died. There are no specific error messages of any sort. I've got lots of ideas for things to try to fix this (e,g, glDeleteTextures), but I really want a way to measure before I start trying to fix.
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Jul 7, 2009
How do we profile an android application's memory ?
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Oct 4, 2010
Can you please tell me how can I do memory profile for an android application? I want to find out how are the objects created and where did those created.
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Apr 13, 2010
I have a requiirement of finding out the max RAM usage of my application. I tried installing the Memory Profilers in eclipse but I was not able to use it with my application. Please let me know how can I find the RAM usage of my application on the 'emulator'.
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Jul 21, 2010
I have a very large image and I only want to display a section the size of the display (no scaling), and the section should just be the center of the image. Because the image is very large I cannot read the entire image into memory and then crop it. This is what I have so far but it will give OutOfMemory for large images. Also I don't think inSampleSize applies because I want to crop the image, not lower the resolution.
Uri data = getIntent().getData();
Input Stream is = getContentResolver().openInputStream(data);
Bitmap bitmap = BitmapFactory.decodeStream(is, null, null);
Any help would be great?
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Apr 23, 2010
Newb here joining the forum. I have a couple of questions about my stock B2. First, what steps can i take to optimize for speed, internal memory and battery life? i am getting about 8-10 battery life hours. Is this normal? And, are there any lets say core apps to recommend?
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Sep 27, 2010
Is there any way to pre allocate the memory required for a bitmap. Android's memory model is making it very difficult for me to cache images I need to cache.
It would seem the problem is because the VM heap rarely shrinks itself, so I would like to just allocate memory for bitmaps ahead of time? but I can not figure out how to do this?
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Feb 26, 2009
Ok I am at the end of my rope. I am doing some image processing. I have a large image file which I open and create a smaller bitmap from. At the end of processing I call recycle on everything. I null everything. I run GC manually.
I then try edit another image and I get an out of VM memory error. Bitmap exceeds etc etc.
I am looking at the heap and the secone edit doesn't seem to cause it to increase at all.
What else can I do. Surely google cannot possibly be suggesting that we can open one large bitmap per session and thats it?
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May 13, 2009
Part of my application allows the user to color-correct images. When i open an image for editing, i'd like to know what, more or less, the available bitmap memory is for the device that the app is running on.
For the G1, the limit is use is about 6MByte (about a full-size image that can be taken by the phone (3MPixels) with 16 bit color ==> 6MByte). If i try to open anything larger, i often get an out-of- memory exception. Limiting it to 6MByte reduces these OOM exceptions by a great deal. However, i can see future devices having more memory available because (as one of the reasons) they can take larger pics (e.g. 5MPixel or something).
Right now, my app just uses a hard-coded limit of 6*1024*1024. Is there a way to make this variable, to future-proof this by examine the device my app is running on. If so, how?
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Jun 25, 2010
Is there any API by which we can get CPU or Memory usage of android? I have tried one code as below: Please look into it and let me know if this is the correct way?
package com.infostretch.mainactivity;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStreamReader;..............
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Jun 30, 2010
1 I want to see the usage of memory in the android through the procrank command,but throw a error error: creating kernel interface. Why/ 2 if use the top command, but the info of the %MEM is not correct. Because all the pid's info's sum will >100% ,so Why?
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Aug 10, 2010
I have a list view that display about 25 images with size 60x60 pixels. I dowload this images from internet and I store in an arraylist as Bitmap. I need to save it in a arraylist because a listview will recycle views and so I need, wenn the user scroll, to display the image in the new view WITHOUT downloading again from internet
But after some time I got
java.lang.OutOfMemoryError: bitmap size exceeds VM budget
It seams that I got this exception about after loading 20 images ...
Reading in forum I have read about memory heap.
I try to check the memory heap usage with: Debug.getNativeHeapAllocatedSize and Debug.getNativeHeapSize()
When the exception occours both are about 4M.
But android has more than 4M?
When the application start the values are a little less to 4M so it seams is not a big memory usage or memory leak.
To be sure I want to call : ActivityManager.getMemoryClass() but this method is and instance method and I can't find the object to invoke!
But this method say, that al min should an application have 16M!
Any help? I have seen many topics in google ... but all speak about recycle. But if I recycle a bitmat ... then should I download again from internet?
Should I store the image on flash memory or sd card instead an arraylist in memory?
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Jun 4, 2010
I've read a lot of previous messages on this topic but couldn't find universal agreement on the whole. I can't reproduce this in house, but a customer got an OutOfMemoryError when using an icon chooser dialog.
This dialog is much like the Grid1 example - only it's in a dialog.
The bitmap memory seems to run out after running the dialog a few times for a customer, resulting in java.lang.OutOfMemoryError: bitmap size exceeds VM budget. Should I try to call recycle on the bitmap from an ImageView when I reuse the view? Or would the ImageView do that anyway?
But even if I do that, that's only a small portion of the bitmaps because most of them are seen without scrolling. The Adapter and the GridView are both local variables and therefore shouldn't be referenced after the dialog is dismissed.
I do believe that it should be possible to use many bitmaps in an app - Google Maps does it, Picture Gallery does it. But maybe I need to learn more rules. Some say you should call bitmap.recycle, some say you shouldn't have to. Many say calling gc.collect will make it worse, etc.
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Apr 3, 2010
is there an SDK way to find out the exact amount of memory consumed by a process identified by its pid?
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Dec 4, 2009
In my app, I'm fetching data via HTTP and use the response string to create an ArrayList of objects. So what I'm doing once I get the response is:
String[] fields = response.split("<field>");
and use the field[] values like this:
ArrayList<Movie> movies = new ArrayList<Movie>(); for (int row = 1; row < fields.length; row += 9) { movies.add(new Movie(fields[row], fields[row + 1], ..., fields[row + 8]);
}
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Jul 3, 2010
I have used /proc/meminfo and parsed command response.however it result shows that :
MemTotal: 94348 kB
MemFree: 5784 kB
means. it shows there is only 5MB free memory. Is it possible with android mobile? There is only 5-6 application installed on my mobile and no other task is running. but still this command shows there is very less free memory. Can somebody clarify this? or is there any other way of getting memory usage in android?
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Jul 24, 2010
I have a large bitmap that i would like to keep in memory when the qwerty keyboard is visible. My app is always in landscape, so this is the only configuration change that will cause a reDraw. I heard this is what onRetainNonConfigurationinstance() is for...but cant figure it out. Can someone point me in the right direction?
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May 26, 2009
When I pass a Bitmap using the Binder Remote service mechanism, does the internal implementation of writeToParcel/createFromParcel of the Bitmap class use shared memory?
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Jul 22, 2010
I'm developing an image editor for Android. When I do some operations with small pictures (600x600 - 1024x768), the program work well. But when I do some operations with big pictures, I always obtain an OutOfMemory Error. I read read many post trying to have the image in memory. Also I looked at the Android's Gallery, trying to simulate the effect of loading the image with lower quality and get the complete quality after a while. But I doesn't get to work with large images.
I thought of using the parameter inSampleSize but I raised the problem of having to perform operations on the image and save it with the original size, so it no longer serves me. The only thing I've done is use the parameter inJustDecodeBounds and display an error to the user if the image exceeds the available memory.
Is there any possibility of working with large images with no memory problems? I need urgent help.
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Dec 23, 2009
I need to retrieve the CPU usage and memory usage of a particular running process in android. 1. Can i retrieve the above mentioned information in android. 2. If yes how to do that. 3. If not what is the alternative for this.
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Sep 4, 2009
I have an application in Java-side, and it uses some "SO" files in native-side. How to calculates the memory usage of my application, in Java-side and native-side both? Does Android provides toolkit to calculates the memory usage of application?
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Aug 31, 2010
I am developing an application with a service which show the progress of a timer in the notification area (with a progress bar and a text). I have extracted below a simpler example with the same problem.
The code of the Service:
public class TNService extends Service {
private NotificationManager nm;
private Notification notification;
private RemoteViews remoteView;
@Override
public void onCreate () {................
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Jun 8, 2010
I am trying to get the memory usage for every application at different periods of time. I have checked the docs / threads / forums, and i only found that you can get the total available memory value, but i could not find in the sdk an api call for getting the memory used by a single application. I know that one way to do this is by reading the values from /proc/ <pid> virtual file system but this is painful for the device cpu. Can you help me figure out how to solve this problem ? Or does anyone know how settings -> applications -> manager applications read the memory usage values.
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Feb 19, 2010
how I can find the memory used on my Android application, programmatically. I hope there is a way to do it. Plus I would like to understand how to get the free memory of the phone too.
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Dec 23, 2009
I've been doing a lot of searching and I know a lot of other people are experiencing the same OOM memory problems with BitmapFactory. My app only shows a total memory available of 4MB using Runtime. getRuntime ().totalMemory(). If the limit is 16MB, then why doesn't the total memory grow to make room for the bitmap? Instead it throws an error.............
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Apr 8, 2010
I'm writing game with a large amount of .png pictures. All worked fine. Than I added new activity with WebView and got memory shortage. After that I made some experiment - replace game .png images with ones that just fully filled with some color. As result memory shortage had gone.
But I suppose that Bitmap internally hold each pixel separately so such changes should have no effect. Maybe this because of initial images have alpha channel and my test images have not it?
But actually question is: Will decreasing .png images files sizes make some effect on decreasing usage of VM application heap or not?
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Apr 13, 2010
I want to check one application memory usage and cpu load and power of an appplication in android,What can i do for this?
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Aug 19, 2010
In my application am displaying a list of names and respective pictures ? I am picking picture from gallery through Durable.getFromPath(). ? am displaying list , some i encountered with out of memory error ? please help me to sort out this error?
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