Lifecycle Aware Components
- Life cycle aware components perform actions in response to a change in the status of another component.
- Components can be such as
activitiesandfragments - They help to produce a better organized and lightweight code that is easy to maintain.
- Most of the app components that are defined in the Android framework have life cycles attached to them. life cycles are managed by the
operating system, If the application doesn't follow the rules of theos, There may be the possibility of memory leaks
The life-cycle aware components are made of 3 main parts
| life-cycle | life-cycle owner | life-cycle observer |
|---|---|---|
| It is a class that holds the information of lifecycle states of components like fragments & activities | This defines the owner of the lifecycle. Activity/Fragment can be called as lifecycle owner | The lifecycle observer observes the state of the life cycle and here we can perform some operation |
- Starting/Stopping the video buffering when the application starts and is visible, also stopping the buffering once the application is destroyed
- Handling the location updates, when the application is in foreground /background
What order the events are triggered of lifecycle aware components along with actual life-cycle events
- In the activity creation phase, the activity
life-cycle eventsare triggered first followed by theobserver events - In the activity destruction phase, the
observer eventsare triggered followed by thelife-cycle events
- Here we have an activity that is playing a video using the exo-player, This exo-player is life-cycle aware
- Activity is bound to a lifecycle aware component
- We can observe all the logic of Exoplayer is moved into the life-cycle aware component even though the life cycle is lifecycle aware
- This helps to organize our logic separately
- Exoplayer Activity <->Lifecycle-aware component
