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

Samebug tips0

There are no available Samebug tips for this exception. If you know how to solve this issue, help other users by writing a short tip.

Don't give up yet. Paste your full stack trace to get a solution.

Solutions on the web45869

  • 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
  • Unable to start activity ComponentInfo{com.example.cdrandin.androidapp/com.example.cdrandin.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
  • Unable to start activity ComponentInfo{internetlegion.twentynotes/internetlegion.twentynotes.Activity.GroupCanvasActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.Object org.springframework.http.ResponseEntity.getBody()' on a null object reference
  • Stack trace

    • 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 at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325) 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) Caused by: 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 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) ... 10 more

    Write tip

    You have a different solution? A short tip here would help you and many other users who saw this issue last week.

    Users with the same issue

    You’re the first here who have seen this exception.