Android :: Use Of SAX Parser In Android - OutOfMemory
Mar 14, 2010
I have been using a SAX parser for a while now to get data from various XML, but today i'm banging my head on a new problem with a hudge XML (compared to the previous ones . here around 12k lines) with a lot of repetitive items in it. Most of the time, the items are part of a block :
CODE:.............
The blabla part is of course changing...But, I would like to keep the structure of items (they are titles and subtitles). And for that, I append each blabla with a starting and ending tag <itemx>blabla</itemx>, where x is the position in the tree of items (1, 2, 3 or 4). The slightly problematic part is that with that, I'm creating thousands of useless objects and the garbage collector doesn't have time to clean after the parser, and the inevitable OutOfMemory comes in my face...I have no idea of how to deal with it; The best technique would be if I could take the whole content of <content></content>, but i'm not sure that this is possible with a SAX parser.
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Apr 22, 2009
I have a smaller test case now:
CODE:.......
It works with the Standard SDK, but not on Android. The full code is below this post.
CODE:..........
With Android:
CODE:..........
Full code goes here.
CODE:......................
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Jan 25, 2010
I am facing an Out Of Memory Exception while playing with the application for sometime. I looked in to HeapDump using MAT, and also monitored the heap through DDMS. But HeapDump looks good to me and DDMS heap size is well in limit. Still I am getting this Exception.
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Apr 18, 2010
I really don't know why it's giving me this error... I load an ImageView with an image of 692kb .jpg, using scroll options, so you can scroll it around... the strange it's that when the mobile it's connected to the VM it's less possible to happen. So...how can I prevent this? is there anyway that I can free memory when starting the app? can I tell the system to free memory before loading the image?
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May 21, 2010
I have a really long collection with 10k items, and when running a toString() on the object it crashes. I need to use this output somehow.
CODE:..........
Guide how to increase the heap for and Android application. I don't run the command line.
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Oct 2, 2010
I'm having a hard time resolving a crash report. It's an OutOfMemory exception that occurs during the setContentView in the onCreate of my main activity.
I just want to be sure I understood Android LifeCycle well :
1) The onCreate of my main activity is called once and only once during the life time of my application ? Is that correct ?
2) Just like for the big bang, before the oncreate of my activity, nothing exists for that activity, so memory consumption is zero, no objects exists right ?
So what can cause that sometimes, with random framework and devices, I get an OOM exception ? I mean if say my background image is causing this, it should blow up everytime, on every device, shouldn't it ? I mean the result should be reliable.
The background image is a standard jpg : 360*480 weighing 37kb, nothing fancy really :s
The crash report below :
CODE:.....................
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Nov 5, 2010
In my app, I am creating a bitmap from its colors code like this :
CODE:................
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Sep 17, 2010
I create Android applications for my job. Eclipse is open all day and I am frequently editing XML files for layouts, etc. I find that creating/editing these XML files pushes up the memory use of Eclipse. Eclipse never seems to release any of the memory and eventually Eclipse tells me that there has been some sort of workbench out of memory error and I have to exit. It will not let me save or do much of anything after this point.
Is there a workaround for this? I don't want to have to exit Eclipse and start it up because of this memory issue. Why won't Eclipse free up its memory use? It just keeps going up. I am still having issues with running out of memory, the eclipse.ini suggestions did not fix it.
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Jun 10, 2010
memory - after only 2-3 minutes I get Force Close and outOfMemory Error. I have only onCreate (I know, stupid, but I didn't knew for anything else as I started only few weeks ago) and inside I have...
@Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main);
many lines of code...manipulating with SQLite databases...
}
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Aug 24, 2010
I have an Android app that in the onCreate() method, preloads a lot of graphics.
When I test my app on my HTC Aria and launch it, it runs fine. However, if I press the back button to exit my app, and then launch the app again, it crashes with an OutOfMemoryError: bitmap size exceeds VM budget. If I then launch the app for the third time (right after it has crashed) it launches fine. Then if I close and re-launch it, it crashes again with out of memory. It continues this every-other-time-crashing pattern forever if I keep trying.
I checked to see what life cycle methods were being called and onStop() and onDestroy() are both being called when I exit the app, yet I have a feeling that something is not yet being cleaned up and that by "crashing" the app when I try to launch it the second time, it somehow free's the memory.
Any thoughts on what could be happening or how to remedy this? Please let me know if you need me to post more info.
Info: My app is fairly simple and only has 1 activity that plays some frame animations.
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Mar 3, 2010
Our app has some memory peaks, which let the heap grow to 13M. After the peak, there's 9M of free heap. Everything's fine until Bitmap objects come into play. Despite having 9M of free heap creating Bitmaps, which have only some 100k, now fail with a OutOfMemoryException!
My theory: Allocation fails if (Java) heap *size* plus external allocations (e.g. Bitmaps) exceed 16M, no matter that there is lots of free memory in the heap. The VM could shrink the heap, but actually does not. Would be quite a flaw in the VM.
Does anyone share this theory?
On the downside of this theory: I do not see anything appropriate (killing the process is probably not) an app developer could do to prevent those OutOfMemoryExceptions given that those memory peaks are legitimate and unavoidable.
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Aug 10, 2010
I have a bitmap that I load from the SD card by allowing the user to choose a picture to display. Once the bitmap is created, I set the Bitmap in an ImageView:
CODE:.........................
This works fine. But, if I change the screen orientation from portrait to landscape, and back again a few times, I always get an OutOfMemory exception.
In onPause, I call mBitmap.recycle(), and then on onResume, I call the above code again to create the bitmap and set the ImageView. Since I'm recycling the image each time, how can I get an OutOfMemory error?
In any case, since that failed, I found a post that said to try using onRetainNonConfigurationInstance() and getLastNonConfigurationInstance(). See post http://stackoverflow.com/questions/3250987/save-cache-when-rotate-device/3252547#3252547. I changed my code to work this way, and I still get an error. Changing the code, I had the call to getLastNonConfigurationInstance() in onCreate(), and removed all code in onPause and onResume. provide some way to simply load an image, and then be able to pause and resume the Activity without running out of memory?
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Mar 22, 2010
I have an application which fetches data from server and shows it in different lists in my application. I used the adb shell procrank command to find out the memory usage of my application It takes 10 mb for the UI (I have a single Activity ,but many layout files), And the data which comes from the server is stored in memory arrays for logical representation on UI (As well as database)and it takes 6 mb of the memory .So application's runtime size reaches to 16 mb and then many a times its crashing after that with OutOfMemoryException. Another major problem is that later for the next client release , the data comming from the server will be around 12 mb.. :( :( So i need to do a major restructuring in the App.I beleive that i cannot increase my App size from 16 mb to more So my question here is , can i have two seperate applications , one of which will fetch the data from the server and keep it in memory as well as database and another App will be used for showing the UI and it will do an inter Application communication to fetch the data and display it on the UI in this App. So the 1st App wil be a backgrond App which will handle Server communication as well as data storage , the second App will start this 1st App .
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Aug 6, 2009
I wonder why I sometimes get an OutOfMemory Exception in mapView when scrolling around on map and zooming in to the max Zoomlevel? Is this a bug in the Zoomcontrols or MapView Lib?
Here the stacktrace:
CODE:.........................
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Aug 25, 2010
I've been trying to make a simple live wallpaper out of a boot animation. So basically i have about 50 .pngs in my drawable folder. I'm able to set the animation to about 10-20 frames and it works great. But once i set it to about 30 frames...I get an OutOfMemory Error. I was hoping maybe someone could take a look at my code and maybe give an example of how I could achieve more frames? That would help so much i've been looking at this for hours > <
Here's my code:..................
And here's a logcat if that'll help at all:
CODE:...............
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Jul 23, 2010
I am trying to set a different wallpaper for every home screen, but I get OutOfMemory issues. I have 5 Bitmaps which I am trying to overlay on a wallpaper Bitmap which is 5 times the display width. Using the code below I get OOM. The problem seems to be the first line of code which creates the large wallpaper Bitmap. My question is whether there is a way to do this (i.e. some way that takes up less memory, or someway to allocate more memory?).
CODE:.......................
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Apr 21, 2009
I sometimes get bug reports that are caused by an OutOfMemory error. It happens when creating a bitmap, but I am pretty sure that it is not the bitmap size that is the real problem, because the instantiation of those images happens > 100.000 times a day without an error report. Those png images are of 4K size (on disk) anyway.
Those bug reports are very infrequent, but still I would love to get rid of them. I can't reproduce the memory growing over 10 MBs (actually way less) when using the app myself and monitoring the memory consumption in DDMS. I also, at no point in time, cache something or hold on to more than one item (article in my case) at a time, except in one list. There the list caches the visible components, which cannot amount to much too and is default functionality from the Android framework.
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Jan 15, 2010
I have a list of 70 text items with image icons(which are stored in drawables folder).
If I launch application the first time and scroll the list slowly - the exception doesn't occur.
When the application is launched the first time and I scroll the list with 'fling' action the following exception occurs:
COD:.....................
After that, if I kill the application with DDMS, start it again and scroll it with 'fling' action, exception doesn't occur. So the exception arises only if application is installed and launched the first time.
Here is the adapter I use for the list:
CODE:................
Is there a way to avoid the exception? Should I catch the exception and escape the memory somehow?
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Nov 5, 2010
In my application I load a couple of images from JPEG and PNG files. When I place all those files into assets directory and load it in this way, everything is ok:
CODE:..................
But when I try to load the exact same images from sd card, I get an OutOfMemory exception!
CODE:..............
This is what I get in the log:
CODE:...........
UPDATE: Tried both of these on real device - it seems that I can't load more than 12MB of bitmaps into whatever is called "external memory" (this is not an sd card).
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Nov 17, 2010
I have to manage several Bitmap in a ListView where each row is composed by one thumbnail and one textview. This ListView can be very long, over 500 rows...
There are two problems I have to solve:
1) it is better if I cache all the bitmaps, maybe using SoftReferences in a HashMap. I've tried this way, but I noticed a strange behavior with the SoftReferences. It seems that the GC clean them too fast. Why?
2) In order to implement the cache correctly I'd also like to understand which is the best practice you suggest me to realize a "image lazy loading". For example... I'm thinking to load all the data for first and then to load only the thumbnails, but only those really visible on the device screen at the and of the scroll action.
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Aug 7, 2009
If anybody know how to do XMl parsing.
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Oct 7, 2010
I have wrote a ContentHandler for SAX parser to retrieve data from and xml file, but it does't work on 2.1-update1, but works fine on 2.2, What is on earth is the changes, anyone knows?
The problem I encountered is exactly the same as stated at: http://code.google.com/p/android/issues/detail?id=11223
----
*Reported by m.de.kwant, Sep 14, 2010*
My application uses a urlconnection to retrieve a soap response. This XML is run through the default saxparser available in the java/android lib.
In android version 2.1 the XML is not parsed correctly. I fact there seems to be no parsing at all, while the raw input is available.
In android version 2.2 the input XML is parsed and the return result from my handlers is correct.
In short. SaxParser on 2.1 does nothing (no result, no error, no parsing), Saxparser on 2.2 works like it supposed to work.
Are there any work arounds for this problem ?
*Comment 1 by project member e...@google.com, Sep 14, 2010*
you can have a look at the differences between 2.1 and 2.2 yourself.
Status: Declined Owner: e...@google.com Labels: Component-Dalvik Delete comment Comment 2 by jiangjun.jking, Today (95 minutes ago)
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Oct 10, 2013
I am developing a C++ module for Android and needs to do some XML formatting of messages.
Is there a way of doing XML parsing using C++ in Android?
I know that JAVA has XML class to do parsing. But unfortunately i will not be able to use that as am doing the development on C++.
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Nov 22, 2010
I'm using a SAX Parser where it is not recognizing. symbols that am getting from it, but when I save the file instead of parsing through a parser they are seen in the file. My xml file is of utf-8 format.
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Mar 13, 2010
When I run my application the following error will occur sometimes, but only sometimes. Can you explain why it occurs only occasionally and what the solution for this is?
The error message is:
CODE:...................
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May 20, 2010
I'm trying to extract n0Y7ezLlIYA8R0K54rEmHaTOraBQVSPDjQaGlQxlGso4jdVN1kRxtcfskEs= using w3c dom
[CODE]
I got it to work but it seems a little bit clunky.
[CODE:]
Is there a prettier way to get the token?
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Oct 27, 2010
I need to implement an xml parser and the parsed result into an expandablelistview.
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Oct 12, 2010
I am trying to implement a robust RSS/Atom reader for android, and since Xerces won't compile I am struggling to find an alternative. I am using org.xmlpull.v1.sax2.Driver(), however this just wraps a DOM parser with SAX callbacks. Is there anything comparable to Xerces on Android?
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Feb 3, 2013
I have to develop one android application.
Its performs the attribute value is display on listview...
This is my xml tags:
Quote:
<root>
<Categories>
<Category name="books">
[Code]....
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Jul 18, 2010
I am trying to create a Forum Parsing Application that uses the XML Pull Parser to grab the HTML and then go through it and parsing it for the specific data. I managed to create one that works however when I try to create another one that is used by another Activity in the same Application it gets stuck in a infinite loop.
http://pastebin.com/8YciNjXL
When I debug my code I traced it all the way down to Line 51... while (eventType != XmlPullParser.END_DOCUMENT)
Apparantly eventType gets forever stuck as 0, this is an almost exact copy of my other XML Pull Parser and I have no idea where I or it went wrong.
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