The technical principles of the local radio manager in the Android support library (Technical Principles of Local Broadcast Manager in Android Support Library)

The Local Broadcast Manager in the Android support library is a mechanism for sending and receiving broadcasting in the application.The local broadcast manager provides an effective way to perform internal communication, and it also enhances the security of the application. The technical principles of the local radio manager are as follows: 1. Register Broadcast Receivers: Before using a local broadcast manager, you need to register a broadcast receiver.The broadcast receiver is a class that inherits from the BroadcastReceiver for monitoring and processing broadcast messages.By calling LocalBroidCastManager's registerReceiver () method to register a broadcast receiver, specify the type of broadcast type to be received. BroadcastReceiver receiver = new MyBroadcastReceiver(); LocalBroadcastManager.getInstance(context).registerReceiver(receiver, new IntentFilter("com.example.MY_ACTION")); 2. Send local broadcast (Sending Local Broadcasts): To send local broadcasts, you need to create an Intent object and set up a broadcast type.Send a broadcast by calling the SendBroidcast () method of LocalBroidCastManager. Intent intent = new Intent("com.example.MY_ACTION"); LocalBroadcastManager.getInstance(context).sendBroadcast(intent); 3. Receive local broadcast (Receiving Local Broadcasts): The registered broadcast receiver is triggered when receiving a matching broadcast.The receiving broadcast is encapsulated in an Intent object and is processed by the onReceive () method. public class MyBroadcastReceiver extends BroadcastReceiver { @Override public void onReceive(Context context, Intent intent) { // Analyze the receiving broadcast information and process it } } 4. Security: Unlike global broadcasting, local broadcasts can only be received by components in the same application.This improves the security of the application because it does not cause the risk of leakage across application information.At the same time, because the components in the application can receive local broadcasts, it is more efficient than the global broadcast. The local broadcast manager is a powerful tool provided in the Android support library for efficient and secure communication within the application.By proficient in the technical principles and use of local broadcasting managers, you can easily realize the internal communication and message transmission of the application.