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 processing.org by Unknown author, 1 year ago
Can't create handler inside thread that has not called Looper.prepare()
via processing.org by Unknown author, 1 year ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by kanhaiyabgs
, 5 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by Ankita Sethi
, 5 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Google Groups by Esa Kylli, 5 months ago
Can't create handler inside thread that has not called Looper.prepare()
via Stack Overflow by 4naxr
, 7 months 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:205)
at android.os.Handler.(Handler.java:119)
at android.widget.Toast$TN.(Toast.java:339)
at android.widget.Toast.(Toast.java:98)
at android.widget.Toast.makeText(Toast.java:245)
at processing.test.toast.toast.showToast(toast.java:40)
at processing.test.toast.toast.mousePressed(toast.java:36)
at processing.core.PApplet.mousePressed(Unknown Source)
at processing.core.PApplet.handleMouseEvent(Unknown Source)
at processing.core.PApplet.dequeueEvents(Unknown Source)
at processing.core.PApplet.handleDraw(Unknown Source)
at processing.core.PGraphicsAndroid2D.requestDraw(Unknown Source)
at processing.core.PApplet.run(Unknown Source)
at java.lang.Thread.run(Thread.java:838)

Users with the same issue

14 times, 4 months ago
11 times, 9 months ago
10 times, 11 months ago
2 times, 1 year ago
Once, 1 year ago

Write tip

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