A method for monitoring the status of network connections in Android _android

There is no need to connect to the server in the absence of a net or poor network speed.
You can use Connectivitymanager to determine whether you are connected to the network and the type of network.

Determine if there is a network connection

The following code uses a Connectivitymanager query to determine whether there is an Internet connection or an active network connection.

Copy Code code as follows:

Connectivitymanager cm =
(Connectivitymanager) Context.getsystemservice (Context.connectivity_service);

Networkinfo activenetwork = Cm.getactivenetworkinfo ();
Boolean isconnected = activenetwork!= null &&
Activenetwork.isconnectedorconnecting ();

To determine the type of Internet connection

The connection type may be mobile data, Wimax,wifi, Ethernet. You can query the network type by using a method similar to the following:

Copy Code code as follows:

Boolean iswifi = Activenetwork.gettype () = = Connectivitymanager.type_wifi;

Mobile data than WiFi power consumption, should be noted. Download large files should be delayed until there is wifi.

Monitor connection changes

Connectivitymanager will send a broadcast "Android.net.conn.CONNECTIVITY_CHANGE" When the connection changes, so register and listen to this broadcast to:

Copy Code code as follows:

<action android:name= "Android.net.conn.CONNECTIVITY_CHANGE"/>

Each time it changes from moving data to WiFi, the change can be frequent. It's best to listen to this broadcast only when you pause the download or update. You typically check your network connection before downloading or updating.
The following section tells the receiver that the toggle switch is declared in the manifest.