title: Different color of texts in the same textview
body: <p>I am using following code</p>
  
  <pre><code> Spannable wordtoSpan = new SpannableString(getString(R.string.signup_text));
      wordtoSpan.setSpan(new ForegroundColorSpan(Color.BLACK), 0, 18, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
      signupText.setText(wordtoSpan);
  </code></pre>
  
  <p>However my textView is showing the same color as set in its xml i-e skin color.</p>
  
  <p>I want to show substring from 0 - 18 as BLACK and rest color as skin color. What is wrong here?</p>