Android sticky header RecyclerView/ Section Header RecyclerView

Question

Hello All I have just created a demo to work with new android L widget RecyclerView.I have also implemented Pull-To-Refresh using SwipeRefreshLayout but problem for me now is ho

Answer 1

public void onScrolled(int dx, int dy)

those are the two arguments that you're receiving onScrolled, that means, the number of pixels that the RecyclerView changed on the X and Y axis... so probably all you want to do is:

@Override
public void onScrolled(int dx, int dy) {
   if(dx < 0) // going up
      showSitckyHeader();
}

you can probably further improve this implementation by adding a minimum scroll amount. Something like:

int totalScrolled = 0;
@Override
public void onScrolled(int dx, int dy) {
   totalScrolled += dx;
   if(totalScrolled < MIN_SCROLL)
      showSitckyHeader();
   if(dx > 0)
      totalScrolled = 0;
}

@Override
public void onScrollStateChanged(int newState) {
   if(newState == SCROLL_STATE_IDLE || newState = SCROLL_STATE_SETTLING)
       totalScrolled = 0;
}

or even go further and implement speed, counting time, but those types of implementation are more tricky, and you have to test it yourself.