同时它们还是实现了 LifecycleOwner 接口，里面的 getLifecycle() 就是返回这个 mLifecycleRegistry 用的。

Posted 2022-08-05 liyanyan665

SupportActivity.java（用于support库）
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public class SupportActivity extends Activity implements LifecycleOwner

private LifecycleRegistry mLifecycleRegistry = new LifecycleRegistry(this);


ComponentActivity.java（用于androidx库）
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public class ComponentActivity extends Activity
implements LifecycleOwner, KeyEventDispatcher.Component

private LifecycleRegistry mLifecycleRegistry = new LifecycleRegistry(this);


Fragment.java
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public class Fragment implements ComponentCallbacks, OnCreateContextMenuListener, LifecycleOwner

LifecycleRegistry mLifecycleRegistry = new LifecycleRegistry(this);





LifecycleOwner.java
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public interface LifecycleOwner
@NonNull
Lifecycle getLifecycle();

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