java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()

Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Samebug tips

,
via vogella.com by Unknown author

Any worker thread runs in background, since it is not intended to loop, is not connected to a Looper.for example doInBackground(). its implementation returns will be passed to onPostExecute() which runs on the UI thread.

Solutions on the web

via Stack Overflow by The Nomad
, 1 year ago
Can't create handler inside thread that has not called Looper.prepare()
via Google Groups by Alexey Tikhvinsky, 3 months ago
Can't create handler inside > thread that has not called Looper.prepare()
via Stack Overflow by wee.ryo
, 1 year ago
Can't create handler inside thread that has not called Looper.prepare()
via GitHub by AnmAtAnm
, 10 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Android Enthusiasts by kanhaiyabgs
, 5 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by ila
, 1 year ago
Can't create handler inside thread that has not called Looper.prepare() 20
java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
at android.os.Handler.(Handler.java:121)
at com.walintukai.lfdate.SocketIOService$9.run(SocketIOService.java:797)
at java.lang.Thread.run(Thread.java:856)

Users with the same issue

Once, 2 months ago
Once, 5 months ago
131 times, 1 year ago
13 times, 1 year ago
5 times, 1 year ago

Write tip

Know the solutions? Share your knowledge to help other developers to debug faster.