cocos2d demo把跳转activity报错

cocos2d 把appActivity放着第二个activity就报错，非启动时的activity。

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8-14 00:16:33.371 9119-9119/org.cocos2d.examplecases E/art: No implementation found for void org.cocos2dx.javascript.SDKWrapper.nativeLoadAllPlugins() (tried Java_org_cocos2dx_javascript_SDKWrapper_nativeLoadAllPlugins and Java_org_cocos2dx_javascript_SDKWrapper_nativeLoadAllPlugins__)
08-14 00:16:33.376 9119-9119/org.cocos2d.examplecases E/AndroidRuntime: FATAL EXCEPTION: main
    Process: org.cocos2d.examplecases, PID: 9119
    java.lang.UnsatisfiedLinkError: No implementation found for void org.cocos2dx.javascript.SDKWrapper.nativeLoadAllPlugins() (tried Java_org_cocos2dx_javascript_SDKWrapper_nativeLoadAllPlugins and Java_org_cocos2dx_javascript_SDKWrapper_nativeLoadAllPlugins__)
        at org.cocos2dx.javascript.SDKWrapper.nativeLoadAllPlugins(Native Method)
        at org.cocos2dx.javascript.SDKWrapper.init(SDKWrapper.java:64)
        at org.cocos2dx.javascript.AppActivity2.onCreate(AppActivity2.java:48)
        at android.app.Activity.performCreate(Activity.java:6251)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
        at android.app.ActivityThread.-wrap11(ActivityThread.java)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:148)
        at android.app.ActivityThread.main(ActivityThread.java:5417)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)

还没找到原因！