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  1. ,
    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 Google Groups by Alexey Tikhvinsky, 8 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
, 1 year ago
Can't create handler inside thread that has not called Looper.prepare()
via Android Enthusiasts by kanhaiyabgs
, 10 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by ila
, 2 years ago
Can't create handler inside thread that has not called Looper.prepare() 20
via csdn.net by Unknown author, 2 years ago
Can't create handler inside thread that has not called Looper.prepare() : E/AndroidRuntime(25729):
java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()	at android.os.Handler.(Handler.java:200)