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Android应用程序窗口（Activity）的测量（Measure）、布局（Layout）和绘制（Draw）过程分析（下）

ViewRoot类的成员函数invalidateChild首先调用另外一个成员函数checkThread来检查当前正在执行的是否是一个UI线程。如果不是的话，ViewRoot类的成员函数checkThread就会抛出一个异常出来。这是因为所有的UI操作都必须要在UI线程中执行...

android的窗口机制分析------UI管理系统

Activity可以看做是整个Android系统的人机接口，它提供了一个窗口来绘制UI，每个Activity在启动时，我们都需要给它设置一个Content view，作为Activity所呈现的UI内容，这个过程是通过setContentView()方法来实现的。 &nbs...

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Android应用程序窗口（Activity）的绘图表面（Surface）的创建过程分析

在前文中，我们分析了应用程序窗口连接到WindowManagerService服务的过程。在这个过程中，WindowManagerService服务会为应用程序窗口创建过一个到SurfaceFlinger服务的连接。有了这个连接之后，WindowManagerService服...

Android窗口管理服务WindowManagerService计算窗口Z轴位置的过程分析

通过前面几篇文章的学习，我们知道了在Android系统中，无论是普通的Activity窗口，还是特殊的输入法窗口和壁纸窗口，它们都是被WindowManagerService服务组织在一个窗口堆栈中的，其中，Z轴位置较大的窗口排列在Z轴位置较小的窗口的上面。有了这个窗口堆栈之...

Android窗口管理服务WindowManagerService对壁纸窗口（Wallpaper Window）的管理分析

Android窗口管理服务WindowManagerService显示Activity组件的启动窗口（Starting Window）的过程分析

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