Question

I maintain an Android app and am not using Eclipse. I am not using Eclipse. I am using ant and build.xml and build.properties.

I have places my .jar file into the libs/ directory. My code compiles just dandy. But when I run it on the emulator, the output APK does not include the .jar, so I get a runtime stacktrace:

ERROR/AndroidRuntime(470): java.lang.NoClassDefFoundError: com.google.ads.AdView

my build.properties looks like this:

jar.libs.dir=libs

And the libs/ directory contains my .jar file.

What needs to be in build.xml so that the external .jar file is included in the APK?

Edit: In theory this answer should work, but it doesn’t for me. Is it out of date? What gives? How to add external jar libraries to an android project from the command line

Answer 1

It turns out that I needed to upgrade the version of ant I was using to 1.8. During the compile process, I had been getting this error message:

Warning: Reference out.dex.jar.input.ref has not been set at runtime,
but was found duringbuild file parsing, attempting to resolve. Future
versions of Ant may support referencing ids defined in non-executed
targets.

I googled it, and found that I needed to upgrade Ant, and now I don’t get this warning, and my application does not force close.