About AsyncTask Generics

Since there were few articles that described what should be specified for the generic type of the (?) AyncTask class that is often used in Android development, I will share it.

AsyncTask<Params, Progress, Result>

Specify three generic types for the AsyncTask class.

When I explain roughly, it will be as follows

AsyncTask<Params, Progress, Result>

parames: The type of value passed to the AsyncTask class, Mainly used in doInBackground (vararg p0: ~~~~)
Progress: Argument type used when asynchronous processing is being executed, Mainly used in ʻon Progress Update (vararg values: ~~~)`
Result: Execution result type, Mainly used in ʻon PostExecute (result: ~~~)`

Specify with Void if you do not use a value etc. with 3 arguments

reference

http://d.hatena.ne.jp/Nagise/20120309/1331265123 https://dev.classmethod.jp/smartphone/android/asynctask/