java.lang.NoSuchMethodError for method on the build path

I have a basic Android project created in Eclipse Indigo. I have a third-party library on my build path, and it is called is used when I instantiate a class from that library in my initial activity.

Although the app build just fine, I encounter the following error: 10-02 19:51:17.311: ERROR/AndroidRuntime(314): java.lang.NoSuchMethodError: org.apache.http.conn.scheme.Scheme.<开发者_开发技巧init>

Earlier in logcat, I do observe the following error message: 10-02 19:50:48.670: DEBUG/dalvikvm(295): DexOpt: not verifying 'Lorg/apache/http/conn/scheme/Scheme;': multiple definitions

This class is included in the third-party JAR; is it used by Android somehow/somewhere to suggest a conflict or other source of "multiple definitions?"

Thanks!

How does one reconcile the conflict - do I have crack open the third-party JAR and exclude the conflicting files?

My guess is that this would not help, though you can certainly try it. Somebody would appear to be trying to call a method on Scheme that perhaps exists in the JAR's own private copy of that class but is not in the Android SDK.

If the third-party JAR in question is Apache HttpClient, simply don't put that JAR in your build path, as HttpClient is already part of Android, and stick to methods that are in the SDK. If the third-party JAR is not Apache HttpClient, I suspect that once you remove their duplicate org.apache.http classes, that something else will break that depended on their own private version of those classes. If that is the case, you should probably take it up with the third-party developer directly, to work with them on Android support for their JAR. You might be able to use tools like jarjar to get past this, but I would not count on it.

You can try something like jarjar, it can break open the jars and rename the packages to a different path at build time. This avoids conflicts like the ones you're having. I'm just not sure it will work with Android.