我如何检查互联网连接？ 安卓

Question

i write func to chek internet conection, but i get Exeption java.lang.SecurityException in this stitch NetworkInfo netInfo = cm.getActiveNetworkInfo();

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

Answer 1

Have you already added the permission to check the network status to you Manifest?

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