问在windows 7上构建时媒体演示崩溃的WebRTC示例

EN

FATAL EXCEPTION: main
Process: org.webrtc.webrtcdemo, PID: 19322
java.lang.UnsatisfiedLinkError: Couldn't load webrtcdemo-jni from loader dalvik.system.PathClassLoader[DexPathList[[zip file "/data/app/org.webrtc.webrtcdemo-1.apk"],nativeLibraryDirectories=[/data/app-lib/org.webrtc.webrtcdemo-1, /vendor/lib, /system/lib]]]: findLibrary returned null   
    at java.lang.Runtime.loadLibrary(Runtime.java:358)
    at java.lang.System.loadLibrary(System.java:526)
    at org.webrtc.webrtcdemo.NativeWebRtcContextRegistry.<clinit>(NativeWebRtcContextRegistry.java:17)
at org.webrtc.webrtcdemo.WebRTCDemo.onCreate(WebRTCDemo.java:91)
at android.app.Activity.performCreate(Activity.java:5231)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1087)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2159)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2245)
at android.app.ActivityThread.access$800(ActivityThread.java:135)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1196)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:136)
at android.app.ActivityThread.main(ActivityThread.java:5017)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:515)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
at dalvik.system.NativeStart.main(Native Method)