On Wed, Nov 17, 2010 at 7:24 AM, Piyush Khanna <[email protected]>wrote:
> Hi,
>
> I am an Android app developer, and I have purchased a Nexus One device
> which I use to continuously test my developed Android applications.
>
> Background:
> -----------------
> One of the applications I developed uses a native shared library (e.g.
> myNativeLib.so). Only my application loads & uses this native library.
> I had developed this app before Android NDK came out. I pack my native
> library into my apk's 'assets' folder, and during my application start-
> up, I extract this native library from my package's assets folder to
> my app private directory (i.e. <assets> -> /data/data/<myappprocess>/
> myNativeLib.so). Then I use System.load() API in my application to
> dynamically load this native library.
>
> Does your library depends on a system library that was not exposed through
the NDK?
If so, this behaviour is to be expected. Otherwise, this is strange.
> Problem:
> ------------
> This application was developed during Android 1.5 (i.e. cupcake) days
> {I didn't have the Nexus One then}. The above procedure has been
> working without any problems right from Android 1.5 to Android 2.2
> (i.e. Froyo). I have also tested the same on my Nexus One for Android
> 2.1 (i.e. Eclair) and Android 2.2.
>
> The problem began the moment I recently upgraded my Nexus One to
> Android 2.2.1 via the FRG83 system update. Now, whenever I try to load
> my native library, I get the following error:
>
> D/dalvikvm( 3653): Trying to load lib /data/data/<myappprocess>/
> <mynativelib>.so <some address>
> I/dalvikvm( 3653): Unable to dlopen(/data/data/<myappprocess>/
> <mynativelib>.so): Cannot load library: link_image[1995]: failed to
> link <mynativelib>.so
>
> I believe there should be an error message from the linker just before that
which indicates what the problem with your library is
(e.g. missing symbol or library dependency). Can you look at it?
> What I have Tried:
> --------------------------
> 1. I tried my application using Android 2.2 SDK (emulator)...it works,
> no issues.
> 2. I checked out the latest froyo & android2.2.1 source code from
> Android open-source, built & tested my application
> + native lib using the latest froyo source...it built & ran, no
> issues. This should've taken care of any changes in the
> native code dependencies between Android 2.2 & Android 2.2.1
> 3. I even checked Android 2.2.1 source code for dalvik (java System &
> Runtime classes) + bionic (linker & dlopen
> sources) between Android 2.2 & Android 2.2.1 (using source checked
> out from Android open-source), but couldn't
> find anything consequential
> 4. I am unable to return my Nexus One to Android 2.2 :(
>
> I'm now confused...is the open-sourced-code for Android 2.2.1
> different from what's available on Nexus One? What can I do to make my
> application work on Nexus One?
>
>
The FRG83 image does not correspond 100% to the content of the Android
open-source tree,
but the most likely reason for the difference might be that you are running
a "user" build on the
Nexus, while you built a "user-debug" or "eng" build from the source tree.
They have a few
differences related to security which might explain the issue.
It's hard to tell without more information. For the record, can you dump the
dynamic section and dynamic symbol table from your shared library?
>
>
> ---------------------------------------
> ---------------------------------------
> Device: Nexus One
> Carrier: Airtel
> Country / Language: India/en
> OS / build number (if applicable): Android 2.2.1 / FRG83
> ---------------------------------------
>
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