跑example出现java.lang.NumberFormatException: null

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[+245941 ms] V/BoostFramework(31261): BoostFramework() : mPerf = com.qualcomm.qti.Performance@7df8cf8
[+2852 ms] I/Timeline(31261): Timeline: Activity_launch_request time:180256935 intent:Intent {
cmp=com.example.baidu_face_plugin.baidu_face_plugin_example/com.example.baidu_face_plugin.baidu_face_plugin.FaceLivenessExpActivity (has
extras) }
[ +21 ms] D/ViewContentFactory(31261): initViewContentFetcherClass
[ ] I/ContentCatcher(31261): ViewContentFetcher : ViewContentFetcher
[ ] D/ViewContentFactory(31261): createInterceptor took 1ms
[ +10 ms] I/TypefaceUtils(31261): Typeface has no familyName field
[ +10 ms] V/BoostFramework(31261): BoostFramework() : mPerf = com.qualcomm.qti.Performance@f45122f
[ ] V/BoostFramework(31261): BoostFramework() : mPerf = com.qualcomm.qti.Performance@b4d403c
[ +2 ms] D/AudioManager(31261): getStreamVolume isRestricted mode = 0
[ +120 ms] D/Camera (31261): app passed NULL surface
[ +392 ms] E/FaceDetectRoundView(31261): Rect(178, 469 - 901, 1193)
[ +1 ms] W/System.err(31261): java.lang.NumberFormatException: null
[ ] W/System.err(31261): at java.lang.Long.parseLong(Long.java:406)
[ ] W/System.err(31261): at java.lang.Long.parseLong(Long.java:485)
[ ] W/System.err(31261): at com.baidu.aip.face.stat.Ast.faceHit(Ast.java:150)
[ ] W/System.err(31261): at com.baidu.aip.face.stat.Ast.faceHit(Ast.java:115)
[ ] W/System.err(31261): at
com.example.baidu_face_plugin.baidu_face_plugin.FaceLivenessActivity.onLivenessCompletion(FaceLivenessActivity.java:430)
[ ] W/System.err(31261): at
com.example.baidu_face_plugin.baidu_face_plugin.FaceLivenessExpActivity.onLivenessCompletion(FaceLivenessExpActivity.java:21)
[ ] W/System.err(31261): at
com.baidu.idl.face.platform.strategy.FaceLivenessStrategyExtModule.processUICallback(FaceLivenessStrategyExtModule.java:422)
[ ] W/System.err(31261): at
com.baidu.idl.face.platform.strategy.FaceLivenessStrategyExtModule.processUITips(FaceLivenessStrategyExtModule.java:387)
[ ] W/System.err(31261): at
com.baidu.idl.face.platform.strategy.FaceLivenessStrategyExtModule.livenessStrategy(FaceLivenessStrategyExtModule.java:148)
[ ] W/System.err(31261): at
com.example.baidu_face_plugin.baidu_face_plugin.FaceLivenessActivity.onPreviewFrame(FaceLivenessActivity.java:410)
[ ] W/System.err(31261): at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1157)
[ ] W/System.err(31261): at android.os.Handler.dispatchMessage(Handler.java:102)
[ ] W/System.err(31261): at android.os.Looper.loop(Looper.java:165)
[ ] W/System.err(31261): at android.app.ActivityThread.main(ActivityThread.java:6375)
[ ] W/System.err(31261): at java.lang.reflect.Method.invoke(Native Method)
[ ] W/System.err(31261): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:912)
[ ] W/System.err(31261): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:802)
[+25675 ms] I/BaiduFacePlugin(31261): onActivityResult: requestCode=10110, resultCode=0, data=null