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

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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 user1851366
, 1 year ago
Can't create handler inside thread that has not called Looper.prepare()
via GitHub by banjaxbanjo
, 1 year ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by Shino Rascal
, 1 year ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by Sharmila Shankar
, 1 year ago
via GitHub by drojokef
, 1 year ago
Can't create handler inside thread that has not called Looper.prepare()
via GitHub by alhdo
, 1 year ago
Can't create handler inside thread that has not called Looper.prepare()
java.lang.RuntimeException: Can't create handler inside thread that has not called Looper.prepare()
at android.os.Handler.(Handler.java:200)
at android.os.Handler.(Handler.java:114)
at android.app.Dialog.(Dialog.java:119)
at android.app.Dialog.(Dialog.java:168)
at android.support.v7.app.AppCompatDialog.(AppCompatDialog.java:43)
at android.support.v7.app.AlertDialog.(AlertDialog.java:95)
at android.support.v7.app.AlertDialog$Builder.create(AlertDialog.java:927)

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