Android determines whether the current android device is online

Android determines whether the current android device is online
First, to determine whether the current android device is online, android itself provides us with a service

PrivateConnectivityManager connectivityManager; // used to determine whether there is a network connectivityManager = (ConnectivityManager) getActivity (). getSystemService (Context. CONNECTIVITY_SERVICE); // gets the network connection service NetworkInfo info = connectivityManager. getActiveNetworkInfo (); // gets the active network connection information

 

First, we need to get the network service of android first. We need to add a permission to the configuration file and then use Context. getSystemService (Context. CONNECTIVITY_SERVICE) obtains the system service and then uses the NetworkInfo class provided to us by android to store the system and return the network service information to us.

If (info = null) {// There is no activated network connection currently (indicating that the data traffic service is disabled or other data services such as WiFi are not enabled) Toast. makeText (getActivity (), "check whether the network connection is enabled", Toast. LENGTH_SHORT ). show ();} else {// There are currently activated Network Connections}

 

Of course, we can also use this code to determine whether our network connection is available.

// To return whether it is valid. If it is True, it indicates that the current Android mobile phone is connected to the Internet, which may be WiFi, GPRS, HSDPA, etc. You can use the getActiveNetworkInfo () method of the ConnectivityManager class to determine the detailed access method connectivityManager. getActiveNetworkInfo (). isAvailable ();