Android C++ Native Code

Question

I am a new Android developer and I would like to create an application using only C/C++ code for Android but I have found the documentation to be very limited. I can create an Android C/C++ project in eclipse, but it uses a lot of java code.

I'm using NativeActivity (new to 2.3) and I need help setting up my project. Does anyone know how to do this?

http://developer.android.com/reference/android/app/NativeActivity.html

There are tutorials and docs for setting up a project. It needs to use Java to set up some native code, but that is as it should be. What is your exact problem? (i.e. Please ask a more specific question.) — Macke
– Macke, Commented Jan 31, 2011 at 18:43

Jason LeBrun · Accepted Answer · 2011-01-31 18:47:20Z

3

Just remove all of the generated Java code. You don't need it if you want a purely native activity. The only thing you need to do is to set up the Android Manifest file as shown in the documentation. In particular, you'll need:

        <!-- Tell NativeActivity the name of or .so -->
        <meta-data android:name="android.app.lib_name"
                android:value="native-activity" />

And you'll need to modify jni/Android.mk so that it builds a jni with the name lib_name.

answered Jan 31, 2011 at 18:47

Jason LeBrun

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3 Comments

Jason LeBrun Over a year ago

You'll need to be using the latest NDK (r5) for this to work, by the way.

Jason LeBrun Over a year ago

For for information on the native activity API, see: $(NDK_ROOT)/docs/NATIVE-ACTIVITY.HTML

jack Over a year ago

I am looking at developer.android.com/sdk/ndk/overview.html .It also says "Compile the native code using the ndk-build command. " "cd <ndk-root>/samples/hello-jni" "<ndk_root>/ndk-build". However, when I try to do that I get "'C:\android\android-ndk-r5\ndk-build' is not recognized as an internal or external command". I am trying to run "C:\android\android-ndk-r5\samples\hello-jni>C:\android\android-ndk-r5\ndk-build"

gbjbaanb · Accepted Answer · 2011-03-04 09:46:33Z

0

Yuo can look into the Lighthouse project for android, which allows you to use Qt (and therefore C++) code instead of java. You still need 1 line of java code to kick off your Qt app.

answered Mar 4, 2011 at 9:46

gbjbaanb

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