Android local radio manager's technical principles in the Java class library (Intropuction to Technical Principles of Local Broadcast Manager in Java Class Libraries of Android Support Library)

Introduction to Android local radio manager technical principles Android Broadcast Manager is a broadcast communication mechanism provided by Android for communication between components inside the application.Local broadcasting is a special broadcast. It is limited to the internal use of the application and will not be accepted by the system broadcaster, which ensures security and efficiency. The technical principles of local broadcasting managers are based on Android event bus mechanisms and radio receiving mechanisms.In Android, broadcasting is a mechanism for crossing the process of communication. The radio sender is sent to the broadcast.Event Bus is a mechanism for communication between components, passing the event as a message to the subscriber.The local radio manager combines the two to provide a mechanism for cross -assessment communication inside the application. Below is a sample code using Android local broadcast manager: First of all, you need to add dependencies to the application's Build.gradle file: implementation 'androidx.localbroadcastmanager:localbroadcastmanager:1.1.0' Next, where the broadcast is sent: // Send broadcast Intent intent = new Intent("com.example.mybroadcast"); intent.putExtra("message", "Hello world!"); LocalBroadcastManager.getInstance(context).sendBroadcast(intent); Then, where the broadcast is received: // Register a broadcast receiver LocalBroadcastManager.getInstance(context).registerReceiver(receiver, new IntentFilter("com.example.mybroadcast")); // Broadcast receiver private BroadcastReceiver receiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String message = intent.getStringExtra("message"); // Treatment of broadcast messages } }; // Cancel the registered broadcast receiver LocalBroadcastManager.getInstance(context).unregisterReceiver(receiver); Through the above code, communication can be achieved between different components inside the application.The component of the sending broadcast sends out the broadcast. The core of Android ’s local radio manager's technical principle is to achieve broadcasting and management of broadcasting through the local broadcast manager class.This class provides the Sendbroid () method to send broadcasts, the registerReceiver () method is used to register a broadcast receiver, and the UnregisterReceiver () method is used to cancel the registered broadcast receiver. In summary, the Android local broadcast manager is a mechanism for component communication within the application. By combining the Android event bus mechanism and the radio receiving mechanism, it has realized efficient and safe communication methods.Developers can simplify the communication between the internal components of the application by using the local radio manager to improve the readability and maintenance of the code. Hope the above content will help you!