Android :: Way To View Phone Native Code Profiling?
Mar 29, 2010
I started my emulator with ./emulator -trace profile -avd emulator_15. I then tracked down the trace files to ~/.android/avd/rodgers_emulator_15.avd/traces/profile, where there are six files: qtrace.bb, qtrace.exc, qtrace.insn, qtrace.method, qtrace.pid, qtrace.static. I can't figure out what to do with these files. I've tried both dmtracedump and traceview on all of the files, but none seem to generate any output I can do anything with.
How can I view the proportion of time taken by native method calls on Android?
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Aug 9, 2010
I am trying to profile native android code, but I am getting the following error.I am running the code on a linux machine.
CODE:............
If anyone knows how to debug this issue...
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Oct 5, 2010
I am working on video renderer application which need surface and control of surface. And through isurface i can register heap buffer to that surface and post buffer operation. I have gone through android_view_surface.cpp file. It is having all required APIs which are helpful for my application. But i don't know how can i implement it. What are the procedures to get access of those APIs.
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Apr 13, 2010
I have a requiirement of finding out the max RAM usage of my application. I tried installing the Memory Profilers in eclipse but I was not able to use it with my application. Please let me know how can I find the RAM usage of my application on the 'emulator'.
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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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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Oct 9, 2010
I wrote an iPhone app some time ago that creates sound programatically. It uses an AudioQueue to generate sound. With the AudioQueue, I can register for a callback whenever the system needs sound, and respond by filling a buffer with raw audio data. The buffers are small, so the sound can respond to user inputs with reasonably low latency.
I'd like to do a similar app on Android, but I'm not sure how. The MediaPlayer and SoundPool classes seems to be for playing canned media from files, which is not what I need. The JetPlayer appears to be some sort of MIDI playback engine. Is there an equivalent to AudioQueue in the Android Java API? Do I have to use native code to accomplish what I want?
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Jul 28, 2009
I'm try to make a dial in native code, could i make a dial with RIL through socket or IPC communication?or push AT command directly to GSM Modem.
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Sep 10, 2009
In Android , Native code is written as follows.
JNIEXPORT void JNICALL Java_com_android_Test_show(JNIEnv *env, jobject obj) {
printf("THIS IS TEST");
}
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Aug 9, 2010
Currently I am trying to compile native code for Android. The code is from the OpenCV port for Android. I pasted all the code correctly in my project and edited my make files accordingly. When I set android:debuggable to false everything works fine and I get my native library. When I try while android:debuggable is set to true I get an error.
Here is a part of the log:
CODE:....................
From what I have found on the internet this is caused by the optimization level of the compilation. As long as the code isn't compiled so that is is debuggable afterwards everything should be fine.
Now apparently it is possible to avoid this by setting APP-OPTIM := release in the Application.mk or adding -O2 to LOCAL_CFLAGS. I have tried both and still I get this error.
Right now I don't really care that much about debugging my native code, but I would like to have basic debugging enabled. And I don't want to keep switching android:debuggable in my manifest every time I want to compile. I'm not even sure if it is okay at all if I just set android:debuggable to false pre compiling and to true post compiling, but I am sure I will forget it every second run.
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Apr 19, 2009
The following is the log from native code.
CODE:.................
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Sep 17, 2009
I've synced my android repository just after android sdk 1.6 announced, but found some problem to install my apps with native code (so built by NDK 1.5_r1) then.
I tried to build NDK with the latest source code, bu unfortunately, faile again :( .
So is there any way to get particular version of android source code? for example the android-1.5r3 tag. Would be great if some command like "svn switch /foo/bar/1.5r3" is available.
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Feb 16, 2010
I am making an android application that shows a list with users, I would like to add the image,name,status,and a button in every row of the list, just like in the androids 1.6 native caller-> favorites tab.Until know I have managed to add the image and name using an ListActivity but when I try to add the button the list becomes unselected.So I have 2 questions, first is the list mentioned above listviews or listactivities? also is this possible using listActivity? and second, what is the difference of the above mentioned classes?
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Jan 11, 2014
My friend and I both have a Galaxy Tab 3.
When he uses his native android video player he can see media listed from DropBox (and a little drop-box icon on the bottom left corner of the thumbnail).He also has the options "View by" under the options button and can select "view by content on DropBox ".
-> This allows him to stream the videos from dropbox on the native vid player without downloading onto the device...
I do not have these options!How do i get them?
I need this because i want to use the AllShare option for streaming to my TV that is available on the native video player.
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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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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.
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