# Android Hello-JNI Build Help

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Hey guys,

I've started development on Android, and currently it is handing me my butt.

Let me give you a little timeline so far and make sure that I haven't screwed anything up:

I applied to the nVidia Tegra3 Developers group which they approved me for.
I "installed" android NDK using their installer. It supposedly installs everything needed to develop android.

I do indeed have the Android SDK, NDK, Eclipse and Ant installed. A cursory look at my environment variables looks like the setup enough for me.

So then I bumble around Eclipse, (I've been a spoiled developer too long working in VS), and import the hello-jni project.

I run the build, it says I'm missing an environment variable for my project. Easy enough, setup an env var called NDK_PROJECT_PATH going to the root directory for the project.

I run the build again, and I get a bunch of warnings and the make command fails.
Here are the warnings I get:

C:\NVPACK\android-ndk-r8d>ndk-build
C:/NVPACK/android-ndk-r8d/build/core/add-application.mk:128: Android NDK: WARNING: APP_PLATFORM android-8 is larger than android:minSdkVersion 3 in C:\NVPACK\android-ndk-r8d\samples\hello-jni/AndroidManifest.xml
C:/NVPACK/android-ndk-r8d/build/core/setup-toolchain.mk:167: warning: overriding commands for target C:\NVPACK\android-ndk-r8d\samples\hello-jni/libs/armeabi'
C:/NVPACK/android-ndk-r8d/build/core/setup-toolchain.mk:150: warning: ignoring old commands for target C:\NVPACK\android-ndk-r8d\samples\hello-jni/libs/armeabi'
C:/NVPACK/android-ndk-r8d/build/core/build-binary.mk:439: warning: overriding commands for target C:\NVPACK\android-ndk-r8d\samples\hello-jni/libs/armeabi'
C:/NVPACK/android-ndk-r8d/build/core/setup-toolchain.mk:167: warning: ignoring old commands for target C:\NVPACK\android-ndk-r8d\samples\hello-jni/libs/armeabi'
C:/NVPACK/android-ndk-r8d/build/core/build-binary.mk:357: warning: overriding commands for target C:\NVPACK\android-ndk-r8d\samples\hello-jni/obj/local/armeabi'
C:/NVPACK/android-ndk-r8d/build/core/build-binary.mk:357: warning: ignoring old commands for target C:\NVPACK\android-ndk-r8d\samples\hello-jni/obj/local/armeabi'
The process cannot access the file because it is being used by another process.
Gdbserver      : [arm-linux-androideabi-4.6] libs/armeabi/gdbserver
The system cannot find the path specified.
make: *** [C:\NVPACK\android-ndk-r8d\samples\hello-jni/libs/armeabi/gdbserver] Error 1
Press any key to continue . . .


Now I'm looking for some general help on what seems to be a very newby question:

How can I get Hello World to compile?

I see that it can't find a path specified. But I have no idea what path they're talking about. Also I see an error regarding accessing a file that's in use, but I don't have much of anything running.

I'm working on a Windows 7 machine, and while I'm an experienced programmer, this is my first time venturing outside of Visual Studios at all, so please don't assume much knowledge from me :)

Thanks!

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Android NDK: WARNING: APP_PLATFORM android-8 is larger than android:minSdkVersion 3

With compilers I usually start from the top of the errors. Looks like your SDK doesn't support that version of android.

The process cannot access the file because it is being used by another process.

Perhaps you tried once and the process never closed?

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Hm. How would I address those issues if you don't mind me asking? Should I re-install the SDK, or is this a project property? And if it's the latter how would I change that? And that is a possibility, though I don't see any obvious offenders in the task manager. Are there any exe's that I should be looking for?

Again sorry for all the (most likely stupid) questions, I'm just not entirely sure what I should be looking for and don't want to overlook anything.

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Well, I'm not sure what process is using your file, however a simple computer reboot will unload whatever is in use. If you still get the file in use error, then you will have to actually track down what has it open.

You got your files off of the nVidia Tegra3 developer site?

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Yeah, they have some sort of Android install package. It looked really appealing to begin with!

I'll do some searching for addressing the SDK warning.

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Well, if all else fails, use Google's installation. Since you do not use Eclipse otherwise, they have an Eclipse install that comes with a few things setup. Give that a try.

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Yeah I might have to do that.

Sigh, I've spent almost 15 hours just trying to get Hello World running!

Thanks for the help. I imagine I'll be back soon.

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I'm reinstalling my installation and giving it a whirl.

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Going back through the installation process, I found this:

The NDK is compatible with older platform versions but not older versions of the SDK tools.

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Hmm maybe. I thought that just meant it wasn't compatible pre-froyo. But I may just need to install the NDK from google and write over what nVidia installed.

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