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jottings's Introduction

杂记

View的相关回调函数

  • 绘制相关
       onMeasure,onLayout, onDraw, onSizeChanged
    • onMeasure * 2(自己) -> onSizeChanged -> onLayout(自己) -> onMeasure(父) * 2 -> onLayout(父) -> visible ? onDraw : pass
  • 生命周期相关
       construct, onFinishInflate, onVisibilityChanged, onRtlPropertiesChanged, ,onAttachedToWindow, onWindowVisibilityChanged, onWindowFocusChanged, onDetachedFromWindow
    • onVisibilityChanged -> construct -> onFinishInflate  -> onVisibilityChanged * 2 -> onRtlPropertiesChanged * 2 -> onAttachedToWindow   -> onWindowVisibilityChanged -> gone ? pass : 绘制相关 -> onWindowFocusChanged -> 用户可见,可交互 -> onWindowFocusChanged -> onWindowVisibilityChanged -> onDetachedFromWindow
  • 点击事件相关
       dispatchTouchEvent, onInterceptTouchEvent, onTouchEvent
    • Activity.dispatchTouchEvent -> ViewGroup.dispatchTouchEvent -> ViewGroup.onInterceptTouchEvent -> View.dispatchTouchEvent -> View.onInterceptTouchEvent -> View.onTouchEvent -> ViewGroup.onTouchEvent -> Activity.onTouchEvent

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