SendBroadcast

SendBroadcast is a method used in Android development to send a broadcast message to all interested BroadcastReceivers. This method is part of the Android Context class and is commonly used to notify other components of the system about specific events or changes. For example, it can be used to announce that the device's battery level has changed, a new SMS message has been received, or a custom application event has occurred.

The sendBroadcast method can be called with different parameters to specify the type of broadcast and its behavior. The most basic form of the method takes an Intent object as a parameter, which contains the action string that identifies the broadcast event. For example, to send a broadcast indicating that a new SMS message has been received, you would create an Intent with the action "android.provider.Telephony.SMS_RECEIVED" and pass it to sendBroadcast.

Additionally, sendBroadcast can be used with a BroadcastReceiver.PendingResult object to control the broadcast's lifecycle and handle ordered broadcasts. Ordered broadcasts are sent to one receiver at a time, allowing each receiver to abort or modify the broadcast before it is sent to the next receiver.

It is important to note that sending broadcasts can have a significant impact on the performance and battery life of an Android device, as it can wake up components and cause them to perform work. Therefore, it is recommended to use broadcasts sparingly and only when necessary. Additionally, broadcasts should be used to communicate between components within the same application or between trusted applications, as they can be intercepted by any application that registers a BroadcastReceiver for the corresponding action.