Problem in detecting Internet Connection in Android

Question

I have created a Android application using Google Maps. Now I want to check whether an internet connection is available or not. I search in Google and finally I got solution

Answer 1

/**
 * Checking whether net connection is available or not.
 * 
 * @param nContext
 * @return true if net connection is avaible otherwise false
 */
public static boolean isNetworkAvailable(Context nContext) {
    boolean isNetAvailable = false;
    if (nContext != null) {
        ConnectivityManager mConnectivityManager = (ConnectivityManager) nContext
                .getSystemService(Context.CONNECTIVITY_SERVICE);
        if (mConnectivityManager != null) {
            boolean mobileNetwork = false;
            boolean wifiNetwork = false;
            boolean mobileNetworkConnecetd = false;
            boolean wifiNetworkConnecetd = false;
            NetworkInfo mobileInfo = mConnectivityManager
                    .getNetworkInfo(ConnectivityManager.TYPE_MOBILE);
            NetworkInfo wifiInfo = mConnectivityManager
                    .getNetworkInfo(ConnectivityManager.TYPE_WIFI);
            if (mobileInfo != null)
                mobileNetwork = mobileInfo.isAvailable();
            if (wifiInfo != null)
                wifiNetwork = wifiInfo.isAvailable();
            if (wifiNetwork == true || mobileNetwork == true) {
                if (mobileInfo != null)
                    mobileNetworkConnecetd = mobileInfo
                            .isConnectedOrConnecting();
                wifiNetworkConnecetd = wifiInfo.isConnectedOrConnecting();
            }
            isNetAvailable = (mobileNetworkConnecetd || wifiNetworkConnecetd);
        }
    }
    return isNetAvailable;

}

Also add below tag in manifest permission:

<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

Answer 2

Try using NetworkInfo ni = cm.getActiveNetworkInfo(); instead of NetworkInfo ni = cm.getAllNetworkInfo();. There should only be one active data network at any one time because Android will use the best available and shut down the others to conserve battery.

Also, I tend to use ni.isConnectedOrConnecting(); instead of ni.isConnected(); because it can catch transition states better.

I also use ni.getType() == ConnectivityManager.TYPE_WIFI instead of ni.getTypeName().equalsIgnoreCase("WIFI") because it is much more efficient to compare two int values than it is to compare two strings.

The following code works for me:

boolean HaveConnectedWifi = false;
boolean HaveConnectedMobile = false;
ConnectivityManager cm = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
NetworkInfo ni = cm.getActiveNetworkInfo();
if ( ni != null )
{
    if (ni.getType() == ConnectivityManager.TYPE_WIFI)
        if (ni.isConnectedOrConnecting())
            HaveConnectedWifi = true;
    if (ni.getType() == ConnectivityManager.TYPE_MOBILE)
        if (ni.isConnectedOrConnecting())
            HaveConnectedMobile = true;
}