title: Floating Action button to PopupMenu with transformation and animation
body: <p>How to proper implement tranformation with animation for Floating Action button to PopupMenu ?</p>
  
  <p>Below there is my fragment of code:</p>
  
  <pre><code>fab.setOnClickListener(new View.OnClickListener() {
      @Override
      public void onClick(View v) {
  
          PopupMenu popup = new PopupMenu(context, fab);
  
          popup.getMenu().add("TEST 1");
          popup.getMenu().add("TEST 2");
          popup.getMenu().add("TEST 3");
  
          popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener() {
              public boolean onMenuItemClick(MenuItem item) {
                  Toast.makeText(context, "You Clicked : " + item.getTitle(), Toast.LENGTH_SHORT).show();
                  return true;
              }
          });
          popup.show();//showing popup menu
      }
  });
  </code></pre>