在appication类内实现LifecycleObserver然后用作打击:
public class App extends Application implements LifecycleObserver{ @SuppressLint("CheckResult") @onLifecycleEvent(Lifecycle.Event.ON_START) public void onMoveToForeground() { } @SuppressLint("CheckResult") @onLifecycleEvent(Lifecycle.Event.ON_STOP) public void onMoveToBackground() { }}
也可以使用其他事件,例如Lifecycle.Event.ON_DESTROY或ON_CREATE
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