title: Android: Insert text into EditText at current position
body: <p>I want to insert a constant string into an EditText by the press of a button. The string should be inserted at the current position in the EditText.
  If I use <code>EditText.append</code> the text gets inserted at the end of the EditText.</p>
  
  <p>How can I do that? I couldn't find a suitable method.</p>