I'm checking Internet connection state by pinging google. The problem is, when there is no connection and the waiting time is hyper-extended.
This is my code:
private boolean checkInternet() {
String netAddress = null;
try
{
netAddress = new NetTask().execute("www.google.com").get();
return (!netAddress.equals(""));
}
catch (Exception e1)
{
e1.printStackTrace();
return false;
}
return false;
}
public class NetTask extends AsyncTask<String, Integer, String>
{
@Override
protected String doInBackground(String... params)
{
InetAddress addr = null;
try
{
addr = InetAddress.getByName(params[0]);
}
catch (UnknownHostException e)
{
e.printStackTrace();
return "";
} catch (IOException time)
{
time.printStackTrace();
return "";
}
return addr.getHostAddress();
}
}
I can not concatenate isReachable(int timeout)
because it returns a boolean
. How can I solve that?
There are a couple of ways to cancel a method if it doesn't complete in the allotted time.
The first answer to this question is probably the way I would go. Here it is slotted into your example.
ExecutorService executor = Executors.newCachedThreadPool();
Callable<Object> task = new Callable<Object>() {
public Object call() {
String netAddress = new NetTask().execute("www.google.com").get();
return (!netAddress.equals(""));
}
};
Future<Object> future = executor.submit(task);
try{
//Give the task 5 seconds to complete
//if not it raises a timeout exception
Object result = future.get(5, TimeUnit.SECONDS);
//finished in time
return result;
}catch (TimeoutException ex){
//Didn't finish in time
return false;
}
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