title: How to determine when text is selected [Android [EditText]]
body: <p>Is possible to determine when text is selected and when is not?</p>
  
  <p>I was googling and I <code>find onSelectionChanged()</code> method or <code>setOnLongClickListener()</code> for determining when user <code>longClick</code>s the editText so when he made selection, but in both cases it can't help me with determining, when the user is not selecting any text (I could set button invisible)...</p>