Android :: Handling Out Of Memory Exception On Image Processing
Sep 16, 2010
This is the sequence part of this question: http://stackoverflow.com/questions/3674441/combining-2-images-overlayed
so the problem is: if the image size is too big - it'll got an exception (out of memory exception)
what i want is, to handle even if the handset got the lower spec hardware, it doesn't go to that exception (but it'll take a longer time to process the image) is it possible to do that?
The code snippet is like this:
CODE:......
And that block of code is inside the async task.
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Sep 3, 2010
Have a dump_log which points to "Out of Memory exception". How do I fix the issue as we have a number of applications running on the Android target?
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Jun 19, 2009
In the Eclipse log I can clearly see a warning pop up (something about buffer overflow) every time I don't read from the AudioRecord buffer fast enough and consequently miss a chunk of audio samples. Is there any way I can detect that notification programatically so I know exactly when I have missed a chunk?
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Aug 9, 2010
I read somewhere not to exception handle when developing in Android, is that true?
If one does need to exception handle are there any logging tools for 2.1 and above?
If shouldn't exception handle, why is it not recommended to at least use the below?
try {body-code} catch (exception-classname variable-name) {handler-code}
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Aug 18, 2009
AsyncTask blocks exceptions? Please see the below code. My "getOffersStatus" function catches certain exceptions and show them in a AlertDialog. But instead of getting my custom exceptions message I get default error dialog "The application ... has stopped unexpectdly. Please try again".
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Nov 24, 2010
I'm developing a media file app that is meant to play sounds stored in my raw folder. There are about 32 sounds in all. And this is what i'm doing on the click of each button:
CODE:.......
I get a runtime exception saying "app stops unexpectedly" with the follow messages in my logcat window:
CODE:................
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Oct 11, 2010
I'm trying to run this piece of code inside my onCreate method as an initial test into writing private data for my app to use. This code is straight out of the Android SDK development guide located here (http://developer.android.com/guide/topics/data/data-storage.html#filesInternal)
CODE:................
However, this code give me errors for the 3 lines of code at the bottom. The error is an unhanded exception. The suggested quick fix is do to the following:
CODE:..........
But after doing that I get an error for the bottom two lines which states that fos may not be uninitialized. How can I fix this code? It's kind of annoying that the Android SDK gives you an example that doesn't even work.
I can't say I'm an expert at exception handling either.
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Jun 22, 2010
I'm trying to catch a login exception thrown by the class that readerAccount belongs to in the code below.
CODE:......................
However, the only part of the catch statement that happens is is the Log.w() function. I was under the impression that during a catch statement, you have the opportunity to recover from errors, but the program blacks out the screen altogether and the dialog is not displayed, nor is the Toast.
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Aug 13, 2010
I am using AsyncTask in my application.
The problem is that when server is down the AsyncTask throws an Interrupted exception. How to track that whether server is down or not.
CODE:.........
This same problem also occurs when the handset is kept idle for some time then keyguard gets lock and I suppose that WI-FI also gets disabled. So, when I enable the keyguard and if my application is in foreground then it gives the same exception. What should I do in order to remove this exception?
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Sep 4, 2010
I have class A in which I have a method openfileConnec().
It was written like the below:
CODE:...............
Now I come to class B where I will call this method like the below:
CODE:.............
I was asked a question in an interview as follows:
Why does the method have a throws Exception in its declaration? Is it that on of the methods called in the implementation throws the base class exception? Also If we get a exception during calling the method (fileConnect( )) control goes to catch block. After executing catch where should the control go, what should be sent to base case?
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Aug 14, 2010
We are converting out suite of iPhone apps written in .NEt MonoTouch to Android.
How do we catch, then publish exceptions so that they are reported via the Android Market?
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Oct 4, 2010
I have written my own Exception (MyException) and implemented Logging and showing Error Messages in Form of Toasts. Here is the shortform of it...
CODE:............
Everything was fine until I now implemented Threads where Exceptions are being thrown and caught.
You probably already have seen, that I played with the Looper Class, but honestly I don't know how to make it work. Is that the right approach? You also can see that I already store a reference of the ApplicationContext in my Controller. Shall I do it with the ActivityContext as well and than make the Toast from this ActivityContext? (But I heard that this is not a good practice in terms of performance)
Update
Is this the way I should go, when an Exception is being caught in a Thread in an Activ ity?
CODE:...........................
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Oct 15, 2011
I want to perform various image processing functions such as threshold,equalize etc on the image i capture from the camera...What should i use in order to do that?
Also,when i installed the app in my phone, after clicking the pic, the next screen appears, and after clicking the button for performing other functions, force close comes up...what could be the reason,because my code works fine without the camera portion...
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Jan 11, 2010
I'm writing an application for Android. I need to make some image processing on the picture taken from camera.I use Camera.PictureCallback to get the photo, and I get picture in byte array.The problem is I want to make operations on every pixel of photo (some filtering and other stuff) so I guess, have photo in byte array is not a bad idea. But I don't know how interpret information in this byte array... The only way I know to make the processing is use BitmapFactory.decodeByteArray() and then use Bitmap object. Is this a good way to handle a lot of image processing?
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Apr 13, 2009
I am confused on how to implement image processing algorithm on JPEG data.I have set P.setpicturesize (640,480) so the camera.takepicture (null,null,Imagecapture callbck) returns the image data. Void onPictureTaken(byte[] data, Camera Camera) returns JPEG data, but(x = data.length), the value of x is less than 640*480 bytes.Please kindly let me know how can I start editing pixel information of the image and image comparison algorithms.
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Aug 19, 2010
I am developing a mobile application that involves complex image processing operations. The app is designed in Java while the core image processing ops are implemented in native code, and compiled using the Android NDK.Now, I know that native code will *not* yield any significant performance improvement over Java code, and that the NDK purpose is only to support re-use of code libs (or to quickly integrate legacy code).are there any resources/tips-n-tricks/white papers/ samples on optimizing image processing algorithms for Android? To be even more specific, I am looking out for optimizing memory operations (cache misses, memory stalls, etc.). I profiled my application code and came to the conclusion that memory issues are causing the *maximum* performance penalty. (Nothing surprising over there, it is expected, but just verified with profile data as well).
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Jul 10, 2010
I am trying to make APP native code for Android. The Native code is in cplusplus. Whenever I try to make, the following error appears.
H236Plus.cpp:135: error: exception handling disabled, use -fexceptions to enable
How do I use -fexceptions to enable exception handling, and where do I use it?
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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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Sep 2, 2010
I have a problem with a strange out of memory exception that only occurs on some devices (mostly HTC Desire). It happens there every time a user starts a certain activity (no matter how - there are two paths to that activity) and i'm really puzzled as to why (i checked for leaks and couldn't find any)...
The error is either thrown when calling setContentView or shortly after.
This is the code block that throws the error:
CODE:.........
As i said - the error is usually thrown when calling setContentView or when calling getMonthTimeStamps()
getMonthTimeStamps is a helper function which creates a list of dates available in the internal database. It creates a couple of (small objects) and returns an ArrayList.
Here is the function:
CODE:.............
I'm not claiming that my code is flawless or perfect, but i really don't understand why this error is thrown. The XML-layout doesn't contain any references to images and not very complicated (textview, spinner, tablelayout).
Here is the error log i received from one user:
CODE:.....................
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Aug 2, 2009
I've got this problem: When my program using too much memory, it die. Is there an exception or something else to warn me? How can I catch it?
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Apr 26, 2010
I have a strange problem on my htc hero. When launching camera, i get out of memory exception. After that, if i launch any other application that uses camera, they also crash(when trying to use camera function).
I call camera.release and camera.stoppreview in surfacedestroyed function, but that doesnt help.
What is the right way to release all resources? Could somebody please show his working surfacechanged, surfacecreated and surfacedestroyed functions? I have empty onPreviewFrame function, should i put something there?
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Oct 11, 2010
iam going to do some applications on mobile using image processing applications.i was asking which will be suitable for me as i will need a programming language that supports phonve devices with high memory, what is the maxiumm number of ram size that has been released to work on phone.is there any name about the phone that support high memory so i can buy it to help me in my work
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Sep 27, 2010
I am currently developing an image processing application for android mobile phones and I would like to know what libraries would you guys recommend me based on your experience.I have heard of JJIL but I do not know how good it might be for what i want to achieve.I need something that implements the basic image processing functions from Matlab toolbox, and i would also like to know if there are any alternatives to JJIL.Additionally, i have heard it is possible to use Matlab's compiler to generate C code that would be useable in a standalone application, but has anybody ever did this before, for Java, adapting it to work in android environment?
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Jan 26, 2009
I am downloading a audio file from server on sd card. It is showing me OutOfMemoryException. This is my code.. --------------------------- package com.android;
import java.io.BufferedInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.net.URL; import java.net.URLConnection;.....................
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Apr 28, 2009
I need to post some files on my server, it works fine for small files like 1mb but when i try for more than 4 mb ; it force close because of memory overload.
Have a look on my code below:
CODE:.................
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Sep 2, 2010
I've been trying to diagnose a memory leak in an Android application I'm writing. I got a heap dump loaded into Eclipse, but the results I'm seeing are very curious. There are some 20,000 instances of an exception (specifically, LDAPException from the UnboundID LDAP library) in the heap with no inbound references.
That is, they show up at the root of the dominator tree. The OQL SELECT objects e FROM com.unboundid.ldap.sdk.LDAPException e WHERE (inbounds(e).length = 0) returns over 20,000 results, totalling to nearly all of the heap. And yet, the GC runs before the heap dump and I can see that it's running in the console, repeatedly, during the execution of the leaky code. If these instances have no inbound refs, what could be keeping them alive?
I also tried doing a "shortest paths to GC" query. It shows one LDAPConnectionReader row retaining 2 instances, and ~20k LDAPException @ <addr> unknown rows with various hex addresses.
Update: I haven't had time to further diagnose this since posting it, and the bounty I posted is ending before I likely will. I'm awarding it as best I can now, lest the points go to waste. Thanks to everyone who looked into this! I will come back later and update again with the results of further diagnosis, when life is a little less hectic.
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Apr 9, 2010
While starting my application I get the following warning in Logcat:
04-09 10:28:17.830: WARN/WindowManager(52): Exception when adding starting window
04-09 10:28:17.830: WARN/WindowManager(52): android.view.InflateException: Binary XML file line #24: Error inflating class <unknown>
04-09 10:28:17.830: WARN/WindowManager(52): at android.view.LayoutInflater.createView(LayoutInflater.java:513)
04-09 10:28:17.830: WARN/WindowManager(52): at .....
Splash is the image that is shown in the splash screen. I have those four folders with for storing drawables in my app:
/res/drawable-hdpi
/res/drawable-ldpi
/res/drawable-mdpi
/res/drawable-nodpi
the splash image has its own version in the first three of them and is displayed properly. Removing the src property from the ImageView removes the image but not the exception. I'm a little bit lost with where to look for the cause of the exception. I even don't know if this is really an issue in this layout file etc. How would you go about finding the cause for this warning?
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Apr 15, 2010
I have some headache with an error about the system going out of memory. When I run the game fo first time there's no problem, but when i quit - with finish();- and then start the app again, it gives me an error.
The LogCat error says:
VM won't let us allocate 5529600 bytes ....
Caused by: android.view.InflateException: Binary XML file line #14:
Error inflating class java.lang.reflect.Constructor ....
Caused by: java.lang.reflect.InvocationTargetException ....
Caused by: java.lang.OutOfMemoryError: bitmap size exceeds VM budget.
it's strange because if I finish the activity and start it again without exiting the app then it's everything OK....but when i finish the app and push the button to load that activity... it crashes with this error and come back to the main menu...
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Feb 23, 2010
I am trying to store an image in phone memory /data/data/com.myapp/ files/here.jpeg but I keep getting an exception. If I try to store the image using the normal 'FileOutputStream' it works fine. Can anyone point out what am I doing wrong? I want to store an image in my phone memory app folder so that when user is setting wallpaper the image can be listed in 'gallery.I do not want to store the image on sd card.
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Jul 10, 2010
I am trying to reduce the size of images retrieved form the camera (so ~5-8 mega pixels) down to one a a few smaller sizes (the largest being 1024x768).It looks like the OOM happens during the createBitmap. Is there a more memory efficient way to do this? Perhaps something that doesn't require me to load the entire original into memory?
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