private static String getStackTraceString(Exception tr)
{
if (tr == null)
{
return("");
}
// This is to reduce the amount of log spew that apps do in the non-error
// condition of the network being unavailable.
Throwable t = tr;
while (t != null)
{
if (t instanceof UnknownHostException)
{
return("");
}
t = t.getCause();
}
StringWriter sw = new StringWriter();
StreamReader pw = new StreamReader(sw);
tr.printStackTrace(pw);
pw.flush();
return(sw.toString());
}