Android :: Development - Debugging Tools / Generate A Java Stack Trace?
Apr 29, 2010
Is there a way to achieve the following in Android?
1. generate a Java stack trace in Android. In J2SE, we use to use something like this - send a signal to the Java Virtual Machine; the Java Virtual Machine generates a stack trace for you; or we can also use debugging tools or Java API calls.
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Sep 20, 2010
My game is crashing on the HTC Hero and I have managed to get a user to send me their log. I don't see a Java stack trace at all. It looks like it's crashing in the OpenGL driver. I was wondering how I could go about trying to determine the problem. I was thinking of adding that acra project that sends crash reports to a server but I am thinking it will just send the same that is in this log. I have error checking everywhere so I am really at a lose where to go from here. I even went out and bought a HTC Hero but Canada only has 1.5 for the OS. Code...
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Dec 16, 2009
So I have an app on the market with >10k active users. I have recieved maybe 50 complaints from Droid-user that the program crashes arbitrarily. I have not been able to replicate the error with my own droid, but I got one of the to send me this crash log. However, it does not reference the application. Do you have any suggestions on how to track down this error? I stand baffled.
11-25 16:18:03.730 D/AndroidRuntime( 2964): Shutting down VM 11-25 16:18:03.730 W/dalvikvm( 2964): threadid=3: thread exiting with uncaught exception (group=0x4001b180) 11-25 16:18:03.730 E/AndroidRuntime( 2964): Uncaught handler: thread main exiting due to uncaught exception 11-25 16:18:03.761 E/AndroidRuntime( 2964): java.lang. Code...
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Jul 6, 2010
Even explicitly writing e.printStackTrace() it doesn't print to the console, why?
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Jun 8, 2010
How do I fix a bug that doesn't point to any of my code? I got the stack trace below from the Marketplace crash reports, but I have no clue how to fix it since it points to none of my own code.
java.lang.NullPointerException:at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:487)at android.view.View.measure(View.java:7964)at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3023) at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)at android.view.View.measure(View.java:7964)at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3023)at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)at android.view.View.measure(View.java:7964)at android.view.ViewRoot.performTraversals(ViewRoot.java:763)at android.view.ViewRoot.handleMessage(ViewRoot.java:1633)at android.os.Handler.dispatchMessage(Handler.java:99)at android.os.Looper.loop(Looper.java:123) at android.app.ActivityThread.main(ActivityThread.java:4363)at java.lang.reflect.Method.invokeNative(Method.java:-2)at java.lang.reflect.Method.invoke(Method.java:521)at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860)at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)at dalvik.system.NativeStart.main(NativeStart.java:-2)
I'm not seeing any issues on any emulators or devices.
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Jul 4, 2009
I'm moving a project to the new Android Native Development Kit (i.e. JNI) and I'd like to catch SIGSEGV, should it occur (possibly also SIGILL, SIGABRT, SIGFPE) in order to present a nice crash reporting dialog, instead of (or before) what currently happens: the immediate unceremonious death of the process and possibly some attempt by the OS to restart it. (Edit: The JVM/Dalvik VM catches the signal and logs a stack trace and other useful information; I just want to offer the user the option to email that info to me really.)
The situation is: a large body of C code which I didn't write does most of the work in this application (all the game logic) and although it's well-tested on numerous other platforms, it's entirely possible that I, in my Android port, will feed it garbage and cause a crash in native code, so I want the crash dumps (both native and Java) that currently show up in the Android log (I guess it would be stderr in a non-Android situation). I'm free to modify both C and Java code arbitrarily, although the callbacks (both going in and coming out of JNI) number about 40 and obviously, bonus points for small diffs.
I've heard of the signal chaining library in J2SE, libjsig.so, and if I could safely install a signal handler like that on Android, that would solve the catching part of my question, but I see no such library for Android/Dalvik.
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Apr 23, 2010
I tried using the MapActivity as given in the following link. http://developer.android.com/guide/tutorials/views/hello-mapview.HTML
I get the error in LogCat : DalvikVm: unable to open stack trace file android '/data/anr/traces.txt' Permission Denied. May I know why this happens. However, after making some changes in the code as shown below, I get the map view perfectly.code...
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Apr 7, 2010
I'm currently working on an android app that pulls a list of forums from a JSON feed. I'm trying to parse the feed and immediately upon calling getJSONArray a JSON exception is being thrown with no stack trace. The JSON being returned is stored in an JSONObject jobj with the format as follows: However when running the following code, I get an immediate exception without a stack trace: Code...
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Aug 17, 2010
Got a trace like this:
java.lang.StackOverflowError
at android.widget.TextView.onMeasure(TextView.java:5160)
at android.view.View.measure(View.java:8172)
at android.widget.TableRow.getColumnsWidths(TableRow.java:308)
at android.widget.TableLayout.findLargestCells(TableLayout.java:497)
at android.widget.TableLayout.measureVertical(TableLayout.java:462)
at android.widget.TableLayout.onMeasure(TableLayout.java:428)
at android.view.View.measure(View.java:8172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3140)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1012)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:381)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:304)
at android.view.View.measure(View.java:8172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3140)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1012)
at android.widget.LinearLayout.measureHorizontal(LinearLayout.java:696)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:306)
at android.view.View.measure(View.java:8172)
at android.widget.ListView.measureScrapChild(ListView.java:1135)
at android.widget.ListView.measureHeightOfChildren(ListView.java:1200)
at android.widget.ListView.onMeasure(ListView.java:1109)
at android.view.View.measure(View.java:8172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3140)
at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1012)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:381)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:304)
at android.view.View.measure(View.java:8172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3140)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
at android.view.View.measure(View.java:8172)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:526)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:304)
at android.view.View.measure(View.java:8172)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:3140)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:245)
at android.view.View.measure(View.java:8172)
at android.view.ViewRoot.performTraversals(ViewRoot.java:805)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1744)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:144)
at android.app.ActivityThread.main(ActivityThread.java:4937)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at dalvik.system.NativeStart.main(Native Method) Is there anything that can be done here? I'm getting reports of blank screens and force closes.
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Feb 12, 2009
Here my application "com.android.hello" calls a core library "libvt.so" through JNI call. There is a segmentation fault in "libvt.so". When executed I get the following log What I see is some Hex value followed by a library name. #00 pc afe0d24c /system/lib/libc.so
Also there is a Stack section 01-01 00:02:57.800: INFO/DEBUG(1600): stack: 01-01 00:02:57.800: INFO/DEBUG(1600):bef2e570 bef2e604 [stack] 01-01 00:02:57.810: INFO/DEBUG(1600):bef2e574 afe0a333 /system/ lib/libc.so
This too gives similar information. I am looking for little more informations rather than Hex values. Like the backtrace feature where the stack hex values is mapped to the function names and function names are visible.
Please provide information how to see the function names in stack rather than Hex values. Is ther any compiler options needs to be updated? Any makefile to be updated to enable backtrace?
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Nov 24, 2010
I would like to inject code in an android application at runtime. I have tried to use dx tool to generate a dexfile in the sdcard but when i want to instantiate, it fails. Are there any tools to inject code generating new dalvik bytecode? I am studying some libraries, aspecjt or guise for android. Is it better to work with a script language?
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Oct 28, 2012
i am installing Android ADT to my Eclipes Juno (manually/Offline) using ADT-20.0.3.zip during installation everything went fine except this message Cannot complete the install because one or more required items could not be found. Software being installed: Android Native Development Tools
20.0.3.v201208082019-427395 (com.android.ide.eclipse.ndk.feature.group 20.0.3.v201208082019-427395) Missing requirement: Android Native Development Tools 20.0.3.v201208082019-427395 (com.android.ide.eclipse.ndk.feature.group 20.0.3.v201208082019-427395) requires 'org.eclipse .cdt.feature. group 0.0.0' but it could not be found
i have to uncheck the Android Native Development Tools check box..but i already did that.. and still the message is there and there's no way i can continue.. the "next" button is still disabled..
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Apr 19, 2009
The following is the log from native code.
CODE:.................
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Nov 18, 2009
Looking for write once deploy across multiple platforms, is there such a thing? Also looking for an tools that would help speed up mobile development, OSX/Linux based preferred.
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Sep 8, 2009
we're looking for high quality developer tools which have been ported & tested for Android. the first is a code correctness tool that will scan our code looking for non-syntactical errors (e.g. thread synch errors, uninitialized vars...). basically a lint- like tool for Android. the second tool we want is a coding style "enforcer" that will fix, or at least report, code segments that do not adher to our stdrd coding styles (e.g. bracing policy, function header commenting etc) the third one is, well, a placeholder for whichever tool you people have found to be of high value in developing your own Android apps...
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Apr 11, 2010
My android app is getting an "Out of memory" error without a useful stack trace. It occurs after I have repeatedly re-invoked its main logic through a menu interaction, which leads me to believe that there's a memory leak somewhere.
I say that the stack trace isn't useful because it doesn't include references to any of my own code. There are no references to my own code in the logcat output, either.
I'm wondering if any of you can help me figure out where my memory leak might be occurring, given my stack trace and my logcat output.
Here's the stack trace: Code...
Could my error be related to the "Window already focused ..." warnings? If so, how can I find out what is causing these? I know that I could sprinkle my code with lots of calls to Log.v() in order to zero in on where my problem might be occurring, but I'm wondering if there is a better way to get more meaningful information about the cause of my memory leak.
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Feb 4, 2009
I am using Mac Pro which has "Darwin" linux. I tried to ADT 0.9.0 by running the script at cupcake/development/tools/eclipse/scripts/build_server.sh. The script keeps failing with error saying that it only works on Linux. I am in need of the ADT 0.9.0. Is there a way for me to successfully building this from the cupcake source? If not, can someone send me a built ADT 0.9.0?
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Dec 26, 2009
Can you please advise if development tools Eclipse, Android sdk, usb driver etc. are working properly under Windows 7 32 and 64 bit?
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Mar 16, 2010
I am now reading contentProvider.java( under the base/core/java/android/content)
Ln 127 looks following:
CODE:..........
I'm really confused about that contentProvider invoke this.query()
CODE:.................
where is it implement? How can i find it? anyone can tell me?
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Nov 20, 2010
I am getting a parsing error and I do not know why (I am new to programing). Because of this error, R.java disappears and I end up having more errors. Hopefully someone can help me out. Here is where the error comes from: list.xml. Code...
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Sep 24, 2010
Does someone know how to generate a javadoc for an android project? I found searching the net this info http://www.androidjavadoc.com/?p=63 , but i don't understand where can i find the file "droiddoc.mk": "All javadoc stuff is concentrated in the ROOT/build/core/droiddoc.mk".
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Oct 1, 2010
I have an Java class with a static final method getAll:
CODE:..............
Now I want to hand in null as a value for the where statemant so that it will just be ignored later on in the code. Anyway in the testcase for this method I have: Vector<Category> categories = Category.getAll(context, null);
Which then in turn gives me a NoSuchMethodError. I don't know exactly why it does that. The only thing I could imagine is that the null I hand in would not match the signature of the above method. But how can I overcome this? I already thought of overloading. But this would just end in rewriting most of the code. At least when I do it, how I think.
This is the stack trace I get:
CODE:.......................
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Jun 2, 2010
Does anyone know what approach one can take to automatically generate Java source code, from for example an xml or json file, in eclipse? One great example of what I am thinking of doing is what Google Android sdk does: they have an R class generated automatically from the resources. Every time a resource file is saved in Eclipse R class is automatically regenerated.
UPDATE: Example:
In the text (xml or json file) I have the following:
<tags>
<tag id="ALPHA">
<description>The first alpha tag.</description>
<value>231232</value> </tag> <tag id="BETA">
<description>This is the beta tag.</description>
<value>231232</value> </tag>
Then in my generated java class, say R I would have something like:
R.tags.ids.ALPHA //refers to an enum value for example
R.tags.values.ALPHA //refers to final int with avlue 231232
R.tags.descriptions.ALPHA //refers to the String with description
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Apr 12, 2010
I am trying to run android sample applications using intellij idea and R.java file is missing form notepad samples source directory.
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Aug 15, 2010
I can't find the source code for the Android Development Tools Plugin for Eclipse. It seems to have been moved a few times, and when I google the question, the answers point to the wrong places. Also http://source.android.com/discuss seems to be down.
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Mar 31, 2010
I have a question.
I am developing android application on Linux platform because i have to make a system.img with a application.
When adding a drawable resource and building the project with mm command, i met a below error.code..
At above error, the icon_send_type is the added resource.
This error occurred because the mm command did not generate R.java.
So, i want to know how to generate R.java by a manual on Linux platform.
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Feb 20, 2009
I can debug the Android Java code using eclipse and using the Remote Java Application debug configuration. This does not step into C/C++ code however as expected. I understand I have to attach the gdbserver to do this. Can someone provide a step by step tutorial on how to debug the native code of Android?Is there a eclipse plugin that makes this easier?
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Apr 17, 2009
I wanted to install ADT using my Eclipse 3.4 Ganymede and the internal update function. I added the site "http://dl-ssl.google.com/android/ eclipse/" and chose to install it.But directly after confirming the installation I got the following error message:
An error occurred during provisioning. Failed to prepare partial IU: [R]com.android.ide.eclipse.ddms 0.8.0.v200809220836-110569.
Do you know what the reason of that error might be?
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Feb 7, 2009
I am trying to figure out what is the best way to debug a mix of Java and native code? Please notice, that I am NOT trying to develop a native app. The app will be written entirely in Java, using Android SDK. However, I noticed that some pieces of the SDK use native methods (e.g. AssetManager, WebKit, etc). I wonder which tools Google developers use if/when they need to debug a mix of Java and C/C++ code? Eclipse/gdb or there are commercial tools which make the debugging experience less painful?
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Jul 17, 2010
I just recently graduated college with a B.S. in Computer Science with a focus on software development, particularity in Java. After graduation I got hired as a Java developer for a company in my area (been there for about a little over a month now). I also starting picking up Android development late in my college career since it closely resembles Java syntax and was easy to jump into.My question is, what would be some good Java / Android projects to do and books to read for recent post-graduates in the software development field focusing on Java?
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