Android WindowManager窗口类型

最新推荐文章于 2024-09-03 13:40:23 发布
最新推荐文章于 2024-09-03 13:40:23 发布
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本文详细介绍了Android中WindowManager的窗口类型，包括普通应用窗口、子窗口和系统窗口等，如TYPE_APPLICATION、TYPE_SUB_WINDOW以及TYPE_SYSTEM_ALERT等，并阐述了它们在Z轴上的排列规则和应用场景。

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从WindowManagerService角度看，一个窗口并不是Window类，而是一个View类。WindowManagerService收到用户消息后，需要把消息派发到窗口，View类本身并不能直接接收WindowManagerService传递过来的消息，真正接收用户消息的必须是IWindow类，而实现IWindow类的是ViewRoot.W类，每一个W内部都包含了一个View变量。

WmS并不介意该窗口（View）是属于哪个应用程序的，WmS会按一定的规则判断哪个窗口处于活动状态，然后把用户消息给W类，W类再把用户消息传递给内部的View变量，剩下的消息处理就由View对象完成。

WindowManager的LayoutParams中窗口类型与定义：

frameworks\base\core\java\android\view\WindowManager.java

/**

  • Start of window types that represent normal application windows.

  • ZMS:首个普通应用窗口

*/

public static final int FIRST_APPLICATION_WINDOW = 1;

/**

  • Window type: an application window that serves as the “base” window

  • of the overall application; all other application windows will

  • appear on top of it.

  • In multiuser systems shows only on the owning user’s window.

  • ZMS:基础窗口-其他应用窗口会显示在此窗口之上

*/

public static final int TYPE_BASE_APPLICATION = 1;

/**

  • Window type: a normal application window. The {@link #token} must be

  • an Activity token identifying who the window belongs to.

  • In multiuser systems shows only on the owning user’s window.

  • ZMS:普通应用窗口-此窗口需要归属于Activity，多用户系统中仅仅在对应用户的窗口中显示

*/

public static final int TYPE_APPLICATION = 2;

/**

  • Window type: special application window that is displayed while the

  • application is starting. Not for use by applications themselves;

  • this is used by the system to display something until the

  • application can show its own windows.

  • In multiuser systems shows on all users’ windows.

  • ZMS:应用启动窗口-应用启动显示的窗口，不受应用本身控制。由系统在应用显示应用本身的窗口之前显示。

*/

public static final int TYPE_APPLICATION_STARTING = 3;

/**

  • End of types of application windows.

  • ZMS:终极应用窗口-所有Activity默认的窗口类型都是TYPE_APPLICATION，

  • WindowManagerService在进行窗口叠加时，会动态改变应用窗口的层值，但不会大于99。

*/

public static final int LAST_APPLICATION_WINDOW = 99;

/**

  • Start of types of sub-windows. The {@link #token} of these windows

  • must be set to the window they are attached to. These types of

  • windows are kept next to their attached window in Z-order, and their

  • coordinate space is relative to their attached window.

  • ZMS:首个子窗口-依附于父窗口。子窗口在Z轴上邻接父窗口，且协调空间与父窗口相关。

  • 子窗口是指该窗口必须要有一个父窗口，父窗口可以是一个应用类型窗口，也可以是任何其他类型的窗口。

*/

public static final int FIRST_SUB_WINDOW = 1000;

/**

  • Window type: a panel on top of an application window. These windows

  • appear on top of their attached window.

  • ZMS:应用窗口子窗口-PopupWindow的默认类型

*/

public static final int TYPE_APPLICATION_PANEL = FIRST_SUB_WINDOW;

/**

  • Window type: window for showing media (such as video). These windows

  • are displayed behind their attached 《Android学习笔记总结+最新移动架构视频+大厂安卓面试真题+项目实战源码讲义》无偿开源 徽信搜索公众号【编程进阶路】 window.

  • ZMS:用来显示Media的窗口

*/

public static final int TYPE_APPLICATION_MEDIA = FIRST_SUB_WINDOW+1;

/**

  • Window type: a sub-panel on top of an application window. These

  • windows are displayed on top their attached window and any

  • {@link #TYPE_APPLICATION_PANEL} panels.

  • ZMS:TYPE_APPLICATION_PANEL的子窗口

*/

public static final int TYPE_APPLICATION_SUB_PANEL = FIRST_SUB_WINDOW+2;

/** Window type: like {@link #TYPE_APPLICATION_PANEL}, but layout

  • of the window happens as that of a top-level window, not

  • as a child of its container.

  • ZMS:OptionMenu、ContextMenu的默认类型

*/

public static final int TYPE_APPLICATION_ATTACHED_DIALOG = FIRST_SUB_WINDOW+3;

/**

  • Window type: window for showing overlays on top of media windows.

  • These windows are displayed between TYPE_APPLICATION_MEDIA and the

  • application window. They should be translucent to be useful. This

  • is a big ugly hack so:

  • @hide

  • ZMS:TYPE_APPLICATION_MEDIA的重影窗口，显示在TYPE_APPLICATION_MEDIA和应用窗口之间

*/

public static final int TYPE_APPLICATION_MEDIA_OVERLAY = FIRST_SUB_WINDOW+4;

/**

  • End of types of sub-windows.

  • ZMS:最后一个子窗口-创建子窗口时，客户端可以指定窗口类型介于1000-1999之间，

  • 而WindowManagerService在进行窗口叠加时，会动态调整层值。

*/

public static final int LAST_SUB_WINDOW = 1999;

/**

  • Start of system-specific window types. These are not normally

  • created by applications.

  • ZMS:首个系统窗口-系统窗口，系统窗口不需要对应任何Activity，也不需要有父窗口，

  • 对于应用程序而言，理论上是无法创建系统窗口的，因为所有的应用程序都没有这个权限，

  • 然而系统进程却可以创建系统窗口。

*/

public static final int FIRST_SYSTEM_WINDOW = 2000;

/**

  • Window type: the status bar. There can be only one status bar

  • window; it is placed at the top of the screen, and all other

  • windows are shifted down so they are below it.

  • In multiuser systems shows on all users’ windows.

  • ZMS:状态栏窗口，层值2000。

*/

public static final int TYPE_STATUS_BAR = FIRST_SYSTEM_WINDOW;

/**

  • Window type: the search bar. There can be only one search bar

  • window; it is placed at the top of the screen.

  • In multiuser systems shows on all users’ windows.

  • ZMS:搜索条窗口，层值2001。

*/

public static final int TYPE_SEARCH_BAR = FIRST_SYSTEM_WINDOW+1;

/**

  • Window type: phone. These are non-application windows providing

  • user interaction with the phone (in particular incoming calls).

  • These windows are normally placed above all applications, but behind

  • the status bar.

  • In multiuser systems shows on all users’ windows.

  • ZMS:来电显示窗口

*/

public static final int TYPE_PHONE = FIRST_SYSTEM_WINDOW+2;

/**

  • Window type: system window, such as low power alert. These windows

  • are always on top of application windows.

  • In multiuser systems shows only on the owning user’s window.

  • ZMS:警告对话框

*/

public static final int TYPE_SYSTEM_ALERT = FIRST_SYSTEM_WINDOW+3;

/**

  • Window type: keyguard window.

  • In multiuser systems shows on all users’ windows.

  • @removed

  • ZMS:锁屏

*/

public static final int TYPE_KEYGUARD = FIRST_SYSTEM_WINDOW+4;

/**

  • Window type: transient notifications.

  • In multiuser systems shows only on the owning user’s window.

  • ZMS:Toast窗口

*/

public static final int TYPE_TOAST = FIRST_SYSTEM_WINDOW+5;

/**

  • Window type: system overlay windows, which need to be displayed

  • on top of everything else. These windows must not take input

  • focus, or they will interfere with the keyguard.

  • In multiuser systems shows only on the owning user’s window.

  • ZMS:系统覆盖窗口，显示在所有窗口之上

*/

public static final int TYPE_SYSTEM_OVERLAY = FIRST_SYSTEM_WINDOW+6;

/**

  • Window type: priority phone UI, which needs to be displayed even if

  • the keyguard is active. These windows must not take input

  • focus, or they will interfere with the keyguard.

  • In multiuser systems shows on all users’ windows.

  • ZMS:在屏幕保护下的来电显示窗口

*/

public static final int TYPE_PRIORITY_PHONE = FIRST_SYSTEM_WINDOW+7;

/**

  • Window type: panel that slides out from the status bar

  • In multiuser systems shows on all users’ windows.

  • ZMS:滑动状态栏后出现的窗口

*/

public static final int TYPE_SYSTEM_DIALOG = FIRST_SYSTEM_WINDOW+8;

/**

  • Window type: dialogs that the keyguard shows

  • In multiuser systems shows on all users’ windows.

  • ZMS:锁屏弹出的对话框

*/

public static final int TYPE_KEYGUARD_DIALOG = FIRST_SYSTEM_WINDOW+9;

/**

  • Window type: internal system error windows, appear on top of

  • everything they can.

  • In multiuser systems shows only on the owning user’s window.

  • ZMS:系统错误窗口

*/

public static final int TYPE_SYSTEM_ERROR = FIRST_SYSTEM_WINDOW+10;

/**

  • Window type: internal input methods windows, which appear above

  • the normal UI. Application windows may be resized or panned to keep

  • the input focus visible while this window is displayed.

  • In multiuser systems shows only on the owning user’s window.

  • ZMS:输入法窗口

*/

public static final int TYPE_INPUT_METHOD = FIRST_SYSTEM_WINDOW+11;

/**

  • Window type: internal input methods dialog windows, which appear above

  • the current input method window.

  • In multiuser systems shows only on the owning user’s window.

  • ZMS:输入法中备选框对应的窗口

*/

public static final int TYPE_INPUT_METHOD_DIALOG= FIRST_SYSTEM_WINDOW+12;

/**

  • Window type: wallpaper window, placed behind any window that wants

  • to sit on top of the wallpaper.

  • In multiuser systems shows only on the owning user’s window.

  • ZMS:墙纸对应的窗口

*/

public static final int TYPE_WALLPAPER = FIRST_SYSTEM_WINDOW+13;

/**

  • Window type: panel that slides out from over the status bar

  • In multiuser systems shows on all users’ windows.

  • ZMS:滑动状态栏后出现的面板窗口

*/

public static final int TYPE_STATUS_BAR_PANEL = FIRST_SYSTEM_WINDOW+14;

/**

  • Window type: secure system overlay windows, which need to be displayed

  • on top of everything else. These windows must not take input

  • focus, or they will interfere with the keyguard.

  • This is exactly like {@link #TYPE_SYSTEM_OVERLAY} except that only the

  • system itself is allowed to create these overlays. Applications cannot

  • obtain permission to create secure system overlays.

  • In multiuser systems shows only on the owning user’s window.

  • @hide

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