resolve of scanning cannot be resolved or is not a field
<p>hi i want to do one tutorial named bluetoothChat from google but i get this kind of erros:</p>

<p>scanning cannot be resolved or is not a field-for line-setTitle(R.string.scanning);</p>

<blockquote>
  <p>id cannot be resolved or is not a
  field
  -for line-findViewById(R.id.title_new_devices).setVisibility(View.VISIBLE);</p>
</blockquote>

<p>how can i solve this kind of errors</p>

<p>Thanks for help</p>
