android - How to make a custom listener? -


i want make listener inside fragment respond when fragment become visible. onpagelistener inside activity doesn't work in situation. need execute asynctask in onstart when enter fragment. onpagelistener tries before.

with button works : 

    ((pulltorefreshlistview) getlistview()).setonrefreshlistener(new onrefreshlistener()     {         @override         public void onrefresh()         {             // work refresh list here.             startnewasynctask();         }     });

this code comes external class got github

a listener respond boolean thing not doing : if(true) { code... }

is won't called when change page see viewpager has started fragment inactive when button pressed listener still reacts , that's need.

try calling function fragment class' onresume() method


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