android - onAttachedToWindow 和 onStart 之间的确切区别是什么

Question

我有时看到人们使用 Activity.onAttachedToWindow 方法，但就我个人而言，我从未使用过它。在阅读它的文档时，我觉得它与 onStart() 几乎相同。

我假设的一件事是: onAttachedToWindow 在 onCreate() 之前被调用 onStop 之后被调用。

我的假设是否正确？ 两者的代表是什么？您什么时候使用哪个？

Answer 1

onAttachedToWindow :

This is called when the view is attached to a window. At this point it has a Surface and will start drawing. Note that this function is guaranteed to be called before onDraw(android.graphics.Canvas), however it may be called any time before the first onDraw -- including before or after onMeasure(int, int).

Activity Lifecycle is explained here .

我发现“starting new activity (Theme.Dialog styled) from onAttachedToWindow() greatly improves response time if comparing to starting it from onCreate()”