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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Solutions on the web45869

Android jawampa - ApplicationError(wamp.error.invalid_uri, [], {}). Using correct URI format, but still crashing

via Stack Overflow by zyeek

, 5 months ago

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

ApplicationError(wamp.error.invalid_uri, [], {}) even when URI is completely valid

via GitHub by cdrandin

, 2 months ago

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

Android : AsyncTask still not finished and getting a NPE because of that

via Stack Overflow by We are Borg

, 1 year ago

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

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