Detailed explanation of Android dynamic registration and monitoring network changes

Detailed explanation of Android dynamic registration and monitoring network changes

Create a new broadcasttest project, and then modify the code in mainactivity as follows:

The dynamically registered broadcast receiver must be unregistered. It is implemented by calling unregisterreceiver () method in ondestroy () method.

To access the network status of the system, you need to declare permissions. Open the androidmanifest.xml file and add permissions in it, as follows:

Run the program to open and close the data connection. The effects are as follows:

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