What restrictions does the BroadcastReceiver component in Android have?

Main limitations of the BroadcastReceiver component in Android:

• Short-lived operation: BroadcastReceiver works very briefly — usually a few seconds. After executing onReceive(), the system may terminate the process if there are no other active components.

• Restrictions on performing long operations: You cannot perform long operations in onReceive() as it blocks the main thread and can lead to ANR (Application Not Responding). For long tasks, you should start a service or use WorkManager.

• Registration restrictions:

  • Statistically registered receivers (in the manifest) do not always receive all broadcast messages, especially starting from Android 8.0 (Oreo) — many implicit broadcasts are limited.
  • Dynamically registered receivers (in code) only work while the component that registered them is active.

• Security: BroadcastReceiver can receive messages from other applications, so it is important to verify data and use permissions for protection.

• Resource limitations: Receivers should not start heavy operations or block the thread, as this can degrade performance and user experience.