如何从Java Android Ping外部IP

获取ip命中的布尔值

public Boolean getInetAddressByName(String name)    {        AsyncTask<String, Void, Boolean> task = new AsyncTask<String, Void, Boolean>()        { @Override protected Boolean doInBackground(String... params) {     try     {         return InetAddress.getByName(params[0]).isReachable(2000);     }     catch (Exception e)     {         return null;     } }        };        try { return task.execute(name).get();        }        catch (InterruptedException e) { return null;        }        catch (ExecutionException e) { return null;        }    }