Check the Internet Connectivity in Android

问题

I am trying to pull as well as push some data to and from the server via webservice. The mandatory thing that should i have to do is connectivity check. What i have done right now is , i have written a connectivity check code in each activity before it pushes/ pulls the result set from the server. I know its not a best way that i should have to code. Instead this connectivity check should be running some thing like a background , (behind the screens) and alerts the user, when the WIFI / 3G becomes low / goes down.

What is the best way to do so ?

Please let me know know your thoughts.

Thank you.

回答1:

You can register a BroadcastReceiver to listen for connectivity changes. A detailed post can be found here.

回答2:

Hi i do these way maybe there better

private boolean checkInternetConnection() {
    ConnectivityManager cm = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);

    // test for connection
    if (cm.getActiveNetworkInfo() != null
            && cm.getActiveNetworkInfo().isAvailable()
            && cm.getActiveNetworkInfo().isConnected()) {
        return true;
    } else {
        //no conection
        return false;
    }
}

回答3:

public static boolean isInternetAvailable(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);

        if(wifi.isConnected() || mobile.isConnected()){
            // Check for web site       
            try{
                // Create a URL for the desired page
                URL url = new URL("http://www.google.com");
                // Read all the text returned by the server
                BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
                in.close();
                return true;
            } catch (Exception e) {
                return false;
            }
        }

        return false;
    }

The method also checks whether a certain website in this case the www.google.com is available. This might be useful as the device might be connected to a WLAN router which has no internet access. In this case wifi.isConnected() would also return true although no internet is available.

回答4:

for check internet connection in android..

public static boolean isOnline(Activity act) 
     {
         ConnectivityManager cm = (ConnectivityManager)act.getSystemService(Context.CONNECTIVITY_SERVICE);
         NetworkInfo netInfo = cm.getActiveNetworkInfo();
        if (netInfo != null && netInfo.isConnectedOrConnecting()) 
        {
            return true;
        }
        return false;

     }

来源：https://stackoverflow.com/questions/6094123/check-the-internet-connectivity-in-android

标签

android

connectivity