Android :: Will Code Cause Memory Leaks?
Aug 3, 2010
Will the code cause a memory leak? Essentially I switch between various layouts in my application using setContentView(), and I have member variables of my activity that maintain references to various views (buttons/text views) on the layouts. Am I correct in thinking that if the activity class has a reference to a button and then changes layouts the layout wont be garbage collected because it will still hold a button reference? If this is the case, can I just null the button variable before changing layouts?
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May 20, 2010
When start Activity A, I found the memory usage of application is about 5MB. Then start Activity B from A via startActivity. In Activity B, I created a thread, and traverse file system in this thread, after traversing completed, call finish() and to return to Activity A. At this time, I found the memory usage of application is about 8MB (GC is forced before check memory usage). How to find Where memory leaks? By the way, I checked the memory usage with DDMS.
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Oct 23, 2010
I have a very simple application which has a problem with getting ListViews to be freed by the GC. i have a ViewGroup which has a ListView. When the page with the ViewGroup no longer has any references to it, and I force a GC, the ListView is not freed. The project in question is quite small and can be found at http://gabysoft.com/download/MemoryLeak.zip. If you run it, the first page has a button and a ListView (which has no items so you cannot see it). When you press the button it switches to a second page which has just a button. When you press the button on the second page, it creates a new ViewGroup and ListView and sets that as the current view. Thus, every time you switch pages, a new ViewGroup/ListView is created, and all references to the old one go away. Hence the old one should be GC'd. However if you switch views 20 times and then force a GC you will see that the ListViews are never freed (i.e. their finalize method (which is logged) is not called). Now here is the really weird part. This happens ONLY if I build my project using Eclipse. If I use Ant to build and install the project, the ListViews are all freed when I do a GC as you would expect. Why would the Eclipse version exhibit this behavior?
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Oct 20, 2010
I have a class 'GListView' which extends ListView and acts as it's own adapter. It is declared thus: public class GListView extends ListView implements List Adapter In it's constructor, I set it's adapter to itself
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Mar 5, 2010
I was trying to find out were my apps memory was being leaked and was able to discover that when calling registerCallback(...) it would lead to a memory leak after a screen orientation change. What could be some possible things that are causing the leak? I've tried many things. And I do have a unregisterCallback(..) call.
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Jul 27, 2010
I've read that it is a mistake and a source of memory leaks in Android application to keep a long-lived references to a Context.
But I don't understand if it is ok to create an class that looks like this one:
CODE:..........
And call it from an Activity:
CODE:.................
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Apr 10, 2010
I just read the article 'Avoiding memory leaks' in android blog written by Romain Guy. http://android-developers.blogspot.com/2009/01/avoiding-memory-leaks.
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May 17, 2010
How to trace the Memory Leaks in Android Development? I am working on eclipse IDE to develop the application. i cant find out how to rectify the memory or window Leaks Exceptions? Any Idea.
Mainly the Window Leaked error raises the Illegal Argument Exception? how to rectify both og this.
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May 21, 2009
I'm writing a widget. Currently, I'm have a simple ImageView, and calling RemoteViews.setImageViewBitmap(). I'm using a service to do the updates.
I thought it might be a good idea to reuse an existing RemoteViews instance, so I'm only querying it the first time around, and subsequently simply call setImageViewBitmap() with the new image.
This works well initially, but after some time I first start getting "!!! FAILED BINDER TRANSACTION !!!" errors, and later, an OutOfMemory exception.
Simply creating a new RemoveViews instance every time works flawlessy on the other hand. I'm just curios why that would be, any ideas?
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Apr 22, 2013
Any user friendly android app which can effectively show which apps cause memory leaks on a phone?
I can only find developer tools to detect memory leaks within apps like Eclipse MAT. Sadly I'm not a developer so I would rather prefer just a list of apps to uninstall and not the exact cause of memory leak within a specific app.
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Jul 18, 2009
I've got an Android app developed, and I'm at the point of a phone app development where everything seems to be working well and you want to declare victory and ship, but you know there just have to be some memory and resource leaks in there; and there's only 16mb of heap on the Android and its apparently surprisingly easy to leak in an Android app.
I've been looking around and so far have only been able to dig up info on 'hprof' and 'traceview' and neither gets a lot of favorable reviews.
What tools or methods have you come across or developed and care to share maybe in an OS project?
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Dec 23, 2009
I am using kind of results search engine, problem is to remember the searching criteria i made singleton static class which keeps only one instance.In my application there are lots of class level private variables, lots of public static variables, a big util class which contains only static final methods.problem is my application get crash any time any where any spot and interesting thing is crash code always surrounded by try{} catch(Throwable e){} block but never catch, i think it may be memory full issue. I want to discuss one sample case, on the result page i also display result related image, i download image from web and using drawable i place image in the imageview, i created static hashmap to reuse images, some time after downlaod 5 images application crash some times click on a result get user to new detail screen get crash and all code surrounded by try catch block, i am new to mobile program this thing has become night mare to me. Last thing, On emulator hardly application crash but when i try to test the application on device, i am using samsung glaxy android supported to test the application it goes smoth and suddenly it start getting crashed, and after crash android relaunch the activity that throws null pointer exception on every click and caught by try{}catch{} block i think after crashing android dealocate all objects only keep the UI objects thats why when after crash i auto launch the activity clicking causes null pointer exception.how can i stop relaunching crashed activity?
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Aug 12, 2010
I have developed a simple application before testing it i want to check whether any memory leaks are there in the application. I don't know how to identify the leaks in Android. I am using Eclipse IDE for development. Is there a good introduction into finding memory leaks in Android apps somewhere?
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Sep 22, 2010
How to detect Memory leaks in Android JNI code? I am using Froyo
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Dec 15, 2009
I was trying to do a memory game on android, but i can't figure out the code that matching 2 button with the same image..
CODE:..................
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Sep 12, 2010
I would like to know is there any tool in android to find memory leak and code optimization.
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Oct 26, 2010
Can nandroids be renamed? I'm getting quite a few saved up and the date code is not tickling my memory of what the set up was on that particular day.
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Jun 19, 2010
Is it just me, or does it seem like it's been, what, a couple months since the last Froyo RC leak? Ok, maybe more like several days, but aren't you guys starting to jones hard for a newer 2.2 leak? When the first couple came out so quickly one after the other (along with the multiple new baseband versions) it seemed like it was going to be raining Froyo leaks (that sounds odd, doesn't it?) on an almost daily basis. I'm running well on BB Froyo v.2.0 plain vanilla, but looking forward to the next 2.2 RC to stumble out of Moto/Verizon's castle so we can continue the informal beta testing for them.
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May 23, 2010
I have been messing with my eris. I held the power and send button and as usual it checked the leak file and asked if I wanted to update. At this time I noticed a list from one to four., one thing that was listed was bootloader and another was hboot My question would there be a way to get into the 2.1 leak file and some how switch the hboot and bootloader in it with the hboot and bootloader that is on the official ota file or some other jnoot or bootloader. Then convert it back to a zip file and reinstalling it like out was a v4 leak. Sorry if this was a stupid post but just trying to help leak users or devs brainstorm a little.
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Jul 2, 2010
I bought an EVO off of Ebay about a week or so ago and just noticed my light leakage is getting pretty bad. I have sprints insurance on it so I was wondering a few things.
1. Will it be a pain to turn it in for a new phone, and what do I have to pay to do so...I'm guessing they will send me a new one then I'll mail mine back to them>?
2. Would it be the smarter thing to do to wait just a little bit to see the new builds? I'm using a 0003 with a nova screen.
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Oct 14, 2010
Now that it looks like the 2.2 SBF is online, how many people who are running leaks are going to upgrade to the 2.2 OTA that supposedly include an updated bootloader/kernel/radio? For those who did already, do you see any differences at all? Moto made some claims that the new one was better (i.e. that switching between wifi and 3g would be more seamless), but have people noticed differences? I guess I held out on upgrading to OTA because of the no SBF and the whole episode of the unlocked bootloader, but now should I consider upgrading? Would I lose any advantages of staying on the old boot loader?
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May 18, 2010
I found this on Android Central (thanks to IzelTokatl) and someone there did verify it worked for OTA 2.1 phones. I tried it on my leak version 3 phone and I got the Hboot error again. I'm thinking this does not bode well for phones with the leak as once Verizon releases the upgrade for download from PCD or HTC we still won't be able to use it until the Hboot problem is fixed. The following instructions for doing the downgrade to 1.5 are cut and pasted from the Android Central forum and I edited them for PC's: Download the MR2 Upgrade Eris ROM from verizon partner: personal Communications Devices
1. Unzip the file
2. Plug your phone into your PC.
3. Navigate to folder ADR6200_MR2_Upgrade
4. Run .exe file in the folder (RUU_Desire_C_Verizon_WWE_1.17.605.1_release_signe d_with_driver.exe)
5. follow on screen instructions.
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Dec 2, 2009
How to tell the installer intent to install on memory card or on phone memory ?
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Jan 21, 2010
My application is designed to support both portrait and landscape orientations. Using my HTC IO device, it survives 12 orientation changes before throwing an out of memory exception while inflating my activity.When I follow the recommended procedure of using DDMS to first force a GC and then write a heap dump, and then load it into the Eclipse Memory Analyzer, there is only one retained instance of my application, as there should be. None of the other retained objects are obvious offenders. Just for yuks, I reran the test, and did everything the same way except I didn't force a GC. In this case I see 13 instances of my application, which is more consistent with throwing an OOM exception. Is this telling me something useful? If forcing a GC with DDMS reclaims the memory used by now-defunct instances of my activity, I would have thought the VM would have garbage collected some, if not all of these defunct activities automatically. Do I need to request GC at the very beginning of my activity lifecycle to make sure?
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Feb 19, 2009
I wanna to add some code in Camera Apps code , so that it will invoke my Application and do the thing as per my desier. Is it possible to change the Application code? If any one already tried this then plz let me know, how to proceed and build if i change some code. How to integrate my application with camera apps.
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Jan 27, 2010
I can build a daemon with my algorithm code and main function.I put all files in one folder under /development and make This executable file works successfully
Now I want to separate my algorithm code and main function code. I hope to build a binary library with my algorithm code and main function will link this binary library to use.
Where to put my algorithm code to create binary library and how to link this binary library in main function code?
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Jan 22, 2010
I am trying to integrate my code to the android Home Screen code. I want to launch my activity frm the HomeScreen by click of a button. I Did the code & then build it but when i click the button i m getting error as Application not installed on phone.
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Jul 10, 2010
iv got a x10i how do i transfer photos from phone memory to my memory card as i can't find an option do do this.
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Jun 24, 2010
My phone is low on memory, when I open my app manager it shows my mail app is using 59mb of memory. I have erased all mail and cleared the cache with no change. I am running android 2.1
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Jun 25, 2010
I have a 4GB SD card and it thinks that it has a total of 200MB on there (Its empty). I have tried formatting it using my Mac & via the phone itself but it continues to believe that its a 200MB MiniSD card.
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