How to signal readiness of Recyclers

Asked Aug 09 '18 at 12:14

Active Aug 09 '18 at 13:48

Viewed 33 times

I have a working app presently, but I don't like the implementation for my Recyclers.
My goal is to know when a Recycler and Adapter is ready to be called without throwing a nullpointer, illegalstate, etc... This can happen if I try to swap data sets too soon.

My research led me to using the ViewTreeObserver draw listeners, but I am hoping that there is a better solution that I missed. Something similar to MediaPlayer.setOnPreparedListener would be nice.

Presently using:

    Recycler.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { 
    @Override public boolean onPreDraw() { 
        // code to signal readiness 
return true; 
        } });

Is there a better way to accomplish this?

edited Aug 09 '18 at 13:48

asked Aug 09 '18 at 12:14

Jason P.

2

Share some code of what you are doing at them moment. – Tomas Jablonskis Aug 09 '18 at 12:16
Recycler.getViewTreeObserver().addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { // code to signal readiness return true; } }); – Jason P. Aug 09 '18 at 12:31
Sorry about the comment formatting. – Jason P. Aug 09 '18 at 12:38
Add everything to your question by editing it. Don't post code in comments. :) – Tomas Jablonskis Aug 09 '18 at 12:39
refer this link https://stackoverflow.com/questions/30397460/how-to-know-when-the-recyclerview-has-finished-laying-down-the-items – Aug 09 '18 at 13:56
Android Team, that looks familiar. Actually, It may have been what led me to using the ViewTreeObserver. – Jason P. Aug 11 '18 at 10:16

How to signal readiness of Recyclers

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