Native method not found:org.opencv.core.Mat.n_Mat(III)J

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在项目中将opencv的源文件放入src目录下，调用Mat类的n_Mat()方法报错Native method not foundrg.opencv.core.Mat.n_Mat(III)J，请问有遇到过相同问题的吗，怎么解决的？

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.so库在libs文件夹里，初始化Mat的时候总会报错，来大神帮忙看下，log如下
07-30 11:10:14.517: W/dalvikvm(5120): No implementation found for native Lorg/opencv/core/Mat;.n_MatIII)J
07-30 11:10:20.993: D/AndroidRuntime(5120): Shutting down VM
07-30 11:10:20.993: W/dalvikvm(5120): threadid=1: thread exiting with uncaught exception (group=0x41e47d88)
07-30 11:10:21.043: E/AndroidRuntime(5120): FATAL EXCEPTION: main
07-30 11:10:21.043: E/AndroidRuntime(5120): Process: com.trimps.eid.seal, PID: 5120
07-30 11:10:21.043: E/AndroidRuntime(5120): java.lang.UnsatisfiedLinkError: Native method not found: org.opencv.core.Mat.n_MatIII)J
07-30 11:10:21.043: E/AndroidRuntime(5120):         at org.opencv.core.Mat.n_Mat(Native Method)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at org.opencv.core.Mat.<init>(Mat.java:37)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at com.trimps.eid.seal.util.ImgProcessing.disCompress(ImgProcessing.java:186)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at com.trimps.eid.seal.demo.SealInfos.try_decompress(SealInfos.java:308)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at com.trimps.eid.seal.demo.SealInfos.processMsg(SealInfos.java:267)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at com.trimps.eid.seal.demo.SealInfos.access$0(SealInfos.java:240)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at com.trimps.eid.seal.demo.SealInfos$EventHandler.handleMessage(SealInfos.java:154)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at android.os.Handler.dispatchMessage(Handler.java:102)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at android.os.Looper.loop(Looper.java:212)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at android.app.ActivityThread.main(ActivityThread.java:5135)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at java.lang.reflect.Method.invokeNative(Native Method)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at java.lang.reflect.Method.invoke(Method.java:515)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:878)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:694)
07-30 11:10:21.043: E/AndroidRuntime(5120):         at dalvik.system.NativeStart.main(Native Method)