title: How to multi-select using drag gesture in RecyclerView ?
body: <p>This is a very short question:
  Recently Google has updated its material design guidelines, showing that multi selection of items should be like on the Google-Photos app (<a href="https://material.io/guidelines/patterns/selection.html#selection-usage" rel="noreferrer"><strong>here</strong></a>), as such:</p>
  
  <p><a href="https://i.stack.imgur.com/dJtMK.gif" rel="noreferrer"><img src="https://i.stack.imgur.com/dJtMK.gif" alt="enter image description here"></a></p>
  
  <p>I've noticed that even if you are already in multi-selection mode, you can still use this gesture anywhere you wish.</p>
  
  <p>What I did so far is handling clicking of items for multi-selecting them, but how do I do what Google has shown?</p>