java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.user.androidapp/com.example.user.androidapp.SelectedDevice}: java.lang.NullPointerException: Attempt to invoke virtual method 'rx.Observable ws.wamp.jawampa.WampClient.publish(java.lang.String, java.lang.Object[])' on a null object reference
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, 2 years agojava.lang.NullPointerException: Attempt to invoke virtual method 'rx.Observable ws.wamp.jawampa.WampClient.publish(java.lang.String, java.lang.Object[])' on a null object reference
at com.example.user.androidapp.WampTasks.Alert(WampTasks.java:66)
at com.example.user.androidapp.SelectedDevice.onCreate(SelectedDevice.java:13)
at android.app.Activity.performCreate(Activity.java:5990)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:151)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5254)
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:903)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)