Cocos2dx 3.0 RC run android project error

I create a new project from Cocostudio 1.3
I run android project in Eclipse mac.
then I get this error below,
This is because it can’t load libcocos2dlua.so,
how to create libcocos2dlua.so in Cocos2dx 3.0 RC.
Thanks
Regards

threadid=1: thread exiting with uncaught exception (group=0x417302a0)
04-07 10:39:25.590: E/AndroidRuntime(12072): FATAL EXCEPTION: main
04-07 10:39:25.590: E/AndroidRuntime(12072): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.XXX.XXX/org.cocos2dx.lua.Cocos2dxActivity}: java.lang.IllegalArgumentException: Unable to load native library: /data/data/com.xxx.xxx/lib/libcocos2dlua.so
04-07 10:39:25.590: E/AndroidRuntime(12072): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2097)
04-07 10:39:25.590: E/AndroidRuntime(12072): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2122)
04-07 10:39:25.590: E/AndroidRuntime(12072): at android.app.ActivityThread.access$600(ActivityThread.java:140)
04-07 10:39:25.590: E/AndroidRuntime(12072): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1228)
04-07 10:39:25.590: E/AndroidRuntime(12072): at android.os.Handler.dispatchMessage(Handler.java:99)
04-07 10:39:25.590: E/AndroidRuntime(12072): at android.os.Looper.loop(Looper.java:137)
04-07 10:39:25.590: E/AndroidRuntime(12072): at android.app.ActivityThread.main(ActivityThread.java:4895)
04-07 10:39:25.590: E/AndroidRuntime(12072): at java.lang.reflect.Method.invokeNative(Native Method)
04-07 10:39:25.590: E/AndroidRuntime(12072): at java.lang.reflect.Method.invoke(Method.java:511)
04-07 10:39:25.590: E/AndroidRuntime(12072): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:994)
04-07 10:39:25.590: E/AndroidRuntime(12072): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:761)
04-07 10:39:25.590: E/AndroidRuntime(12072): at dalvik.system.NativeStart.main(Native Method)
04-07 10:39:25.590: E/AndroidRuntime(12072): Caused by: java.lang.IllegalArgumentException: Unable to load native library: /data/data/com.xxx.xxx/lib/libcocos2dlua.so
04-07 10:39:25.590: E/AndroidRuntime(12072): at android.app.NativeActivity.onCreate(NativeActivity.java:199)
04-07 10:39:25.590: E/AndroidRuntime(12072): at org.cocos2dx.lua.Cocos2dxActivity.onCreate(Cocos2dxActivity.java:14)
04-07 10:39:25.590: E/AndroidRuntime(12072): at android.app.Activity.performCreate(Activity.java:5163)
04-07 10:39:25.590: E/AndroidRuntime(12072): at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1094)
04-07 10:39:25.590: E/AndroidRuntime(12072): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2061)
04-07 10:39:25.590: E/AndroidRuntime(12072): … 11 more
04-07 11:30:16.121: W/NativeActivity(12563): ANativeActivity_onCreate not found
04-07 11:30:16.121: D/AndroidRuntime(12563): Shutting down VM
04-07 11:30:16.121: W/dalvikvm(12563): threadid=1: thread exiting with uncaught exception (group=0x417302a0)

Cocostudio version:1.3
Cocos2dx version:3.0 RC

This is just because I don’t run build_native.py.