Android :: Stack Tool For Android Dev - Debug Native C++ Code

Sep 12, 2010

I am writing an android game that involves some c++. I have a fairly repeatable crash that seems to be due to my c++ code

Looking at the page:
http://source.android.com/porting/debugging_native.html#Debug_Scenarios (right at the end)

it says to run the output through the "stack tool" - which I can find no trace of.. nor aproto.

Android :: stack tool for android dev - debug native c++ code


Android :: How To Debug Native Code In Eclipse

Jun 18, 2010

I created one android application it is using one native method. I created shared library using ndk tools.My jni function is having some problems i want to debug it. How to debug it in eclipse tool

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Android :: Print Backtrace When Debug Native Code

Nov 23, 2010

When I debug android app, if I work with Java, I can use Log.d("TAG", "xxxx", new Throwable()) to print backtrace of Java code. This is really handy for me to find bugs. But when I work with native library (e.g. libwebcore.so), there seems no way to print backtrace in runtime. The only way to debug native code is use gdbserver.

I have a question: Is there any way to print backtrace in C/C++?

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Android :: How To Parse And Analyze The Call Stack Of Native Code - Tools

Apr 19, 2009

The following is the log from native code.

CODE:.................

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Android :: Debug Native JNI Code On Android Emulator

Jul 2, 2009

I'm trying to debug my native JNI code located on a shared library. I have been trying to debug using gdb/gdbserver.

Here is how I go about, trying to debug:

How to debug JNI native code on the Android emulator I'm using gdb/gdbserver I do this at the emulator terminal gdbserver localhost:

CODE:..............

when I step on the Android Java code so the function Java_testJNI_printHello is called, I get this error on the server side gdb: Unable to get location for thread creation breakpoint: requested event is not supported

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Android :: Way To Debug Kernel Code?

Sep 10, 2010

I've got some trouble with the media backend (mostly Stagefrightplayer) in Android, and I'd like to understand why it throws the errors it does. The errors are usually device spesific, so debugging on an emulator wouldn't be sufficient.

Example:

CODE:.................

Example 2:

CODE:.............................

I've also gotten the player to bork completely and spit out a traces.txt.

Is there a way to debug what's happening, just like I debug Java code?

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Android :: Best Way To Include Debug Code?

Apr 27, 2010

I am programming Android applications, and the best way here may or may not be the same as Java in general.I simply want to be able to set a debug flag that will only execute certain portions of code when it's set to true equiv to C++ setting a preprocessor #define DEBUG and using #ifdef DEBUG.Is there an accepted or best way to accomplish this in Java?

Right now I'm just going to set a variable in my Application object, but I don't imagine this is the best way.

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Android :: How To Compile Sip Stack With Phone Source Code?

Jul 7, 2010

Anyone could compile some SIP Stack in C/C++ along with Android source code? Note: i am referring not to compile the Sip Stack with ndk, but compile with all the code of the Android platform.

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Android :: Stack Trace / Fix A Bug That Doesn't Point To Any Of Code?

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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Android :: Use AIDL Tool From Command Line Using SDK Sample Code?

Feb 1, 2010

My question concerns using aidl.exe (on a Windows system) from the command line. This question has nothing to do with Eclipse, Netbeans, etc. Included with the Android SDK are the following three AIDL definition files: IRemoteService.aidl IRemoteServiceCallback.aidl ISecondary.aidl. Located in the following directory: C:android-sdk-windowsplatformsandroid 2.1samplesApiDemossrccomexampleandroidapisapp. For the sake of simplicity, I copied aidl.exe into the above directory. Then, from a console Window, I successfully used the following two commands to generate .java files: C:Android-projectApiDemossrccomexampleandroidapisapp>aidl IRemoteServiceCallback.aidl C:Android-projectApiDemossrccomexampleandroidapisapp>aidl ISecondary.aidl. Invoking these commands produced the files: IRemoteServiceCallback.java and ISecondary.java, respectively. So far so good. I note that both .aidl files are simple; they include no 'import' statements..............................

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Android :: How To Reach The Sub Activity Code In Debug Mode

Jul 25, 2010

I have a activity B that is called by activity A, I want to debug the code in B. I have set the breakpoint, however the debug control never enters B.

CODE:................

When I debug in eclipse, although the class B is called from class A, the debbugger pointer never enters the new window, where I have placed a debug point in Class B. I am not able to take the pointer control to class B and stop at a specific point, which will help me verify certain variable values.

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Android :: Native RTP Stack On Android

Jun 29, 2010

Is there a native RTP stack available on in Android Froyo release ? If not, are there any plans to bring one in the future releases ?

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Android :: Way To Use Win32 Eclipse To Debug Code On Emulator That Runs On Linux?

Oct 12, 2009

I am running Eclipse on Win32 and my Android emulator on Linux.

Is there a way to use Win32 eclipse to debug code on the emulator that runs on Linux?

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Android : Setting A Debug Breakpoint At First Line Never Runs Through Code In Class

Jul 21, 2010

I set a toggle breakpoint at line 36 of the main class, of APIDemos 8, the debug begins at the OnCreate but never processes another line in the class. Why is that?

Here's the code starting a line 36. Code...

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Android :: Using Sqlite In Native Code

Nov 22, 2010

I have a library written in C which implements some complicated algorithm over two databases and as a result produce new one. I am trying to import it in android using android-ndk. What is the correct wat to use sqlite in you native libraries, i was able to build the sqlite manually using the ndk but when i use it gives some strange errors when trying to fetch rows from db which is on phone storate - after i fetch some data i got SQL:database not opened. how can use sqlite in native code on android.

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Android :: Can Use TraceView In Native Code When Using NDK

Dec 10, 2009

We know that it's very convenient to use TraceView in Android java code to check the runtime of different chunks of code. Now I develop my app with NDK and I want to check the runtime of some native functions, but I found nothing in TraceView guide if it's possible to use this tool. Because I noticed that one of my native methods spent too much time and I want to dig out the more detailed root cause. Is there anybody know if we can use TraceView in native code?

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Android :: Using Surface In The Native Code

Feb 3, 2010

I am planning to write a video player application and I am planning to use the gstreamer on the native side. I am trying to use the SurfaceFlinger for the rendering part. For this I have written a test program to experiment on the rendering part. I am using the surface flinger wrapper from the project

http://gitorious.org/rowboat/external-gst-plugins-android

But the following ERROR occurs when we try to run the .apk.

CODE:.......

The I changed the permission for "android.permission.ACCESS_SURFACE_FLINGER" in frameworks/base/core/ res/AndroidManifest.xml to "dangerous" and recompiled. But got the same error.

Then I commented out the "checkCallingPermission" method in IServiceManager.cpp and recompiled. Then also i got the same error.

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Android :: Access Build Type [release / Debug] In Java / Xml Code At Run Time?

Jul 28, 2010

I want to access the build type [release/debug] in java code and xml file to enable or disable the particular feature at the run time.

Please let me know if we have any environment variable defined for it which can be accessed in java code and in xml file also.

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Android :: Any Tool To Find Memory Leak / Code Optimization In Android?

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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Android :: Optimize Android App Code Based On Function Call Stack

May 28, 2010

I've been told that Android OS stores all function calls in a stack. This can lead to many problems and cause the 'hiccups' during runtime, even if a program is functionalized properly, correct?

So the question is, how can we prevent this from happening? The obvious solution is to functionalize less, along with other sensible acts such as refraining from excessively/needlessly creating objects, performing static calls to functions that don't access fields, etc...

Is there another way though? Or can this only be done through careful code writing on the programmers' part? Does the JVM/JIT automatically optimize the bytecode during compile time to account for this?

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Android :: Getting Sensor Information From Native Code - C Or C++

Oct 12, 2010

Is this possible to access a sensor data form native code without using Java at all? I need to access to the sensor as fast as possible, but it seems like the "DELAY_FASTEST" parameter when registering an event change is not fast enough.

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Android :: Using SKIA Canvas In Native Code

Oct 4, 2009

I set out to use SkCanvas and other native SKIA classes but I could not find any sample code. After a week's of search and diving deep into Android source, I got it working. Below in my blog, I have detailed, how to use SimpleJNI native sample, to get native canvas going. If you find it useful or I did something wrong let me know http://matthiyosi.blogspot.com/2009/10/using-skia-in-android-native-c...

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Android :: Debugging Native Code (C++) Using Gdb With Eclipse / Is It Possible?

May 24, 2010

I have some piece of code which uses JNI. I can debug code wrote in Java directly in Eclipse (using ADT). I even have a script, which help me debug native code with gdb. However this is not very comfortable way for doing this.Is it possible to configure Eclipse to use gdb (I guess gdbserver) for debbuging android native applications? Do you know where I could find any description of this?

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Android :: Can Native Only Code Run As Standalone Application

Nov 8, 2010

We want to migrate a huge complex native program to Android system ,running it as a background service accepting command sent from Java Program using JNI along with IPC. However, the Android NDK state following words:

Please note that the NDK does not enable you to develop native-only applications. Android's primary runtime remains the Dalvik virtual machine.

Does that mean we have no way to run an standalone native-only application on Android as a background service? The native code can only exist in the form of library that will be loaded to the virtual machine through JNI?

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Android :: Porting JMF / Native Source Code

Jan 22, 2009

I am creating an Android application which uses the JMF (SIP, RTP, JAIN). So i downloaded the JMF source code for some adhoc change to my application.The basic questions 1. How will it behave the "native files - C/C++/header" in JMF source files(downloaded)? because android is based on java right now. 2. Is there any complete different way to porting/doing the SIP, RTP working in android?Is there any link from sun.com(this) site for JMF source code?Any suggestion and comment about this?

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Android :: How To Add Includes In Native C Code That Will Be Compiled By Ndk

Aug 23, 2010

How I can add headers to my native c file.

So here's the details.

I was able to setup my android project to call a native function from a .so file. And actually I need to add box2d to my project, but I when I include the header files, it won't make. So basically my problem is how do I tell the make file to include a whole folder with header and cpp files.

I tried adding the path directly to the include statement just for the sake of testing it. The error goes away, but new errors come out.

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Android :: How To Broadcast Intent From Native Code

Nov 2, 2010

Is it possible to broadcast an Intent from native code? If so, is there documentation and/or sample code pertaining to the relevant APIs?

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Android : How To Access A File (say .xml) From A Native Code?

Sep 16, 2010

I am trying out an example of OpenCV from http://github.com/billmccord/OpenCV-Android and am stuck at the point where it is mentioned "Before attempting to run the VideoEmulator application, you must first copy this XML file into the emulator in the following location: /data/data/org.siprop.opencv/files/haarcascade_frontalface_alt.xml " Where in my eclipse workspace do I need to place this haar xml file to be copied to the location /data/data/org.siprop.opencv/files/ of the emulator?

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Android :: Access To Databases From Native Code - For Example Mmssms.db

Aug 9, 2010

Try to select (or update) from custom databases (for example mmssms.db) but on init I see " Unable to open the database file". Try send permissions in manifest <uses-permission android:name="android.permission.WRITE_SMS"/> <uses-permission android:name="android.permission.READ_SMS"/> but this doesn't help.

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Android :: App Closes Automatically - Native Code Crash

Jul 12, 2010

I've a very simple / minimal code application.

I'm drawing some lines on screen with my finger.

At some point, app closes itself / exists automatically.

No exception is thrown.

CODE:......................

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