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java.lang.IllegalStateException: Could not execute method for android:onClick at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:293) at android.view.View.performClick(View.java) at android.view.View$PerformClick.run(View.java) at android.os.Handler.handleCallback(Handler.java) at android.os.Handler.dispatchMessage(Handler.java) at android.os.Looper.loop(Looper.java) at android.app.ActivityThread.main(ActivityThread.java) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java)Caused by: java.lang.reflect.InvocationTargetException at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288) ... 10 moreCaused by: java.lang.ExceptionInInitializerError at org.deeplearning4j.nn.conf.NeuralNetConfiguration$Builder.seed(NeuralNetConfiguration.java:485) at com.mi.dl.MLPClassifierLinear.main(MLPClassifierLinear.java:79) at com.mi.dl.MyActivity.sendMessage(MyActivity.java:70) ... 13 moreCaused by: java.lang.RuntimeException: org.nd4j.linalg.factory.Nd4jBackend$NoAvailableBackendException: Please ensure that you have an nd4j backend on your classpath. Please see: http://nd4j.org/getstarted.html at org.nd4j.linalg.factory.Nd4j.initContext(Nd4j.java:5151) at org.nd4j.linalg.factory.Nd4j.<clinit>(Nd4j.java:169) ... 16 moreCaused by: org.nd4j.linalg.factory.Nd4jBackend$NoAvailableBackendException: Please ensure that you have an nd4j backend on your classpath. Please see: http://nd4j.org/getstarted.html at org.nd4j.linalg.factory.Nd4jBackend.load(Nd4jBackend.java:178) at org.nd4j.linalg.factory.Nd4j.initContext(Nd4j.java:5148) ... 17 more