CODEWITHSUNDEEP
androidexceptionconnection
Arci
Arci

Reputation: 6819

Internet Connection Error

I have an Android application which connects to the Internet. I am trapping all the possible scenarios for the connection and notice that when I don't have an Internet connection, an UnknownHostException is thrown. I am a bit confused here since getting an UnknownHostException will mean that the application was able to connect to the Internet but wasn't able to find the given URL.

Am I getting the right Exception? Could you explain why am I getting an UnknownHostException in this?

Also, can you tell the specific Exceptions for these scenarios:

I would also appreciate it if you could give me more scenarios and Exceptions. I have to trap all the possible connections and display the most appropriate message depending on the type of connection Error.

Upvotes: 20

Views: 17311

Answers (4)

Rizvan
Rizvan

Reputation: 2355

To check internet connection, use this function .

  public boolean isConnectingToInternet(){
    ConnectivityManager connectivity = (ConnectivityManager) _context.getSystemService(Context.CONNECTIVITY_SERVICE);
      if (connectivity != null) 
      {
          NetworkInfo[] info = connectivity.getAllNetworkInfo();
          if (info != null) 
              for (int i = 0; i < info.length; i++) 
                  if (info[i].getState() == NetworkInfo.State.CONNECTED)
                  {
                      return true;
                  }
      }
      return false;
}

Upvotes: 1

user207421
user207421

Reputation: 310850

getting an UnknownHostException will mean that the application was able to connect to the Internet

No it doesn't. It means the application was unable to resolve the host name. That could be because the host name doesn't exist, or because it was unable to connect to the Internet to resolve it.

When there is no Internet connection.

No specific exception. "There is no Internet connection" doesn't have a well-defined meaning. The condition resolves to one of the other failure modes below.

When the URL cannot be found.

If the host cannot be found, UnknownHostException. If the content part of the URL cannot be found, HTTP 404.

When the request timed out.

ConnectException with 'connection timed out' as the message, or SocketTimeoutException if it's a read timeout.

When the website is down.

ConnectException with 'connection refused' as the message.

When access is denied.

HTTP 403.

Upvotes: 38

Uttam
Uttam

Reputation: 12399

Checking Internet Connection,Just try this sample function....

public static boolean CheckInternet(Context context) 
{
    ConnectivityManager connec = (ConnectivityManager) context.getSystemService(Context.CONNECTIVITY_SERVICE);
    android.net.NetworkInfo wifi = connec.getNetworkInfo(ConnectivityManager.TYPE_WIFI);
    android.net.NetworkInfo mobile = connec.getNetworkInfo(ConnectivityManager.TYPE_MOBILE);

    return wifi.isConnected() || mobile.isConnected();
}

I hope this help....

Upvotes: 3

Nikunj Patel
Nikunj Patel

Reputation: 22066

for checking internet connectivity .... 

boolean b_IsConnect = isNetworkAvailable();
private boolean isNetworkAvailable() {
        ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo activeNetworkInfo = connectivityManager
                .getActiveNetworkInfo();
        return activeNetworkInfo != null;
    }

Upvotes: 2

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