embed clojure-android.jar in my android project, invoke "load-string" get a NPE exception

[lywaterman]

Var v = RT.var("clojure.core", "load-string"); v.invoke("(println 1)"); ;;there will throw a NPE

[alexander-yakushev]

I'd love to help you but I can't quite understand what are you trying to do and how. Do you want just to use Clojure in your Android project and call it from Java?

[lywaterman]

Yes, i want to use it like a script language, call it from java, i see the function loadClojure in SplashActivity.java public void loadClojure() { new Thread(new Runnable(){ @Override public void run() { Symbol CLOJURE_MAIN = Symbol.intern("neko.application"); Var REQUIRE = RT.var("clojure.core", "require"); REQUIRE.invoke(CLOJURE_MAIN);

                Var INIT = RT.var("neko.application", "init-application");
                INIT.invoke(SplashActivity.this.getApplication());
                Var load_string = RT.var("clojure.core", "load-string");

                load_string.invoke("(println 123112123123)");

                proceed();
            }
        }).start();

} it work fine when i use lein-droid, but when i setup a android project use eclipse, it always throw a npe when invoke.

[alexander-yakushev]

Unfortunately, using Clojure as a java library on Android is outside the scope of this project. There is though a special mailing list for general Clojure/Android discussions: https://groups.google.com/forum/#!forum/clojure-android.

Are you sure that you've added clojure.jar dependency correctly in your Eclipse build? Also, I'm not sure it can work that way without AOT-compiling the Clojure files. Can you check if the DEX contains Clojure classes, this post will help you in this: http://mylifewithandroid.blogspot.no/2009/01/disassembling-dex-files.html

[lywaterman]

It is useful for me, thanks

[lywaterman]

I found than dalvik vm do not support defineClass from byte[], but the clojure-android support it by generating dex file, the code is in DalvikDynamicClassLoader.class, the function is definMissingClass. I give the loader a compileDir, then success, and I can embed clojure in my android project. thanks again.

[alexander-yakushev]

Glad I could help, if I did:).

[benzap]

lywaterman, i'm kind of having the same issue as you. I got the Dalvik version of clojure, but i'm stuck on that last part you mentioned. How and what did you do to give it a 'Compile Directory?'

[alexander-yakushev]

@benzap do you also try to embed Clojure lib into Java/Android application?