new a AsyncTask cause 'Can't create handler inside thread that has not called Looper.prepare()'
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Can't create handler inside thread that has not called Looper.prepare()
There are a few threading rules that must be followed for this class to work properly:
- The AsyncTask class must be loaded on the UI thread. This is done automatically as of
JELLY_BEAN
. - The task instance must be created on the UI thread.
execute(Params...)
must be invoked on the UI thread.- Do not call
onPreExecute()
,onPostExecute(Result)
,doInBackground(Params...)
,onProgressUpdate(Progress...)
manually. - The task can be executed only once (an exception will be thrown if a second execution is attempted.)
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