title: Get Cell Phone signal strength with No Listener
body: <p>How do I just get the current CDMA signal strength without using a listener?
  I do not need an update if the signal level changes.
  Researching I dont see a solution yet. If it only reveals itself when it changes then how do the signal level bars on top work?  I just need a very rough estimate of cell signal strength related to the bars.</p>
  
  <pre><code>ConnectivityManager cm=(ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
  TelephonyManager tm = (TelephonyManager)getSystemService(Context.TELEPHONY_SERVICE);
  NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
  int CDMAdb=cm.SignalStrength.getCdmaDbm();  
  </code></pre>