FlutterEngine.EngineLifecycleListener

Enclosing class:

FlutterEngine
```
public static interface FlutterEngine.EngineLifecycleListener
```
Lifecycle callbacks for Flutter engine lifecycle events.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`onEngineWillDestroy()`	Lifecycle callback invoked before the Flutter engine is destroyed.
`void`	`onPreEngineRestart()`	Lifecycle callback invoked before a hot restart of the Flutter engine.

- Method Detail
  - onPreEngineRestart
```
void onPreEngineRestart()
```
    Lifecycle callback invoked before a hot restart of the Flutter engine.
  - onEngineWillDestroy
```
void onEngineWillDestroy()
```
    Lifecycle callback invoked before the Flutter engine is destroyed.
    For the duration of the call, the Flutter engine is still valid.