Question

I am using Ubuntu Linux 32bit system, in terminal it shows no class specified

sanidhya09@sanidhya09:~/workspace/NdkFooActivity$ javah -jni
-classpath adt-bundle-linux-x86/sdk/platforms/android-4.2/android.jar;bin/classes/
-d jni/ com.example.NdkFooactivity Error: no classes specified bash: bin/classes/: Is a directory

even i have tried this

sanidhya09@sanidhya09:~/workspace/NdkFooActivity/bin/classes$ javah
-jni -classpath adt-bundle-linux-x86/sdk/platforms/android-4.2/android.jar; com.example.NdkFooactivity.NdkFooActivity Error: no classes specified com.example.NdkFooactivity.NdkFooActivity: command not found

even i tried External tools configuration
where in argument section i wrote

-d /home/sanidhya09/workspace/NdkFooActivity/jni -classpath /home/sanidhya09/adt-bundle-linux-x86/sdk/platforms/android-4.2/android.jar:/home/sanidhya09/workspace/NdkFooActivity/bin/classes com.example.NdkFooactivity

even in eclipse i get error saying
make:

[HelloJni] Error 127 HelloJni C/C++ Problem

Answer 1

sanidhya09@sanidhya09:~/workspace/NdkFooActivity$ javah -jni -classpath bin/classes:~/adt-bundle-linux-x86/sdk/platforms/android-16/android.jar com.example.NdkFooactivity.NdkFooActivity

should be fine, assuming your app package is com.example.NdkFooactivity and the class you are interested in is NdkFooActivity.

Note that you must pass the path to android.jar you actually used to compile. In my SDK, the directory is called android-16, not android-4.2. Also, you need to have the bin/classes directory in classpath. You may need more jars in your classpath.