本文参照自：http://developer.android.com/reference/android/view/WindowManager.LayoutParams.html

和http://blog.sina.com.cn/s/blog_4b3c1f950100qd9s.html

public static class

WindowManager.LayoutParams

extends ViewGroup.LayoutParams
implements Parcelable

java.lang.Object   ?android.view.ViewGroup.LayoutParams    ?android.view.WindowManager.LayoutParams

 WindowManager.LayoutParams 是 WindowManager 接口的嵌套类；它继承于 ViewGroup.LayoutParams； 它用于向WindowManager描述Window的管理策略。

主要成员常量

Window flag系列

该系列主要用于对Window的flag进行设置。设置Window的flag,可以直接对Window的getAttributes()得到其 WindowManager.LayoutParams对象,然后直接对它flag变量操作。也可以Window的addFlags(int flags)方法，setFlags(int flags, int mask)方法，clearFlags(int flags)方法进行操作。

比如设置全屏：

 Window window = getWindow(); 

 WindowManager.LayoutParams winParams = win.getAttributes();

 winParams.flags=winParams.flags|WindowManager.LayoutParams.FLAG_FULLSCREEN；

 或

 window.addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

 或

 window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); 

 取消全屏

 Window window = getWindow(); 

 winParams.flags=winParams.flags&~WindowManager.LayoutParams.FLAG_FULLSCREEN;

 或

 window.clearFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);

 或

window.setFlags(0, WindowManager.LayoutParams.FLAG_FULLSCREEN);

所有Window flag如下：

intFLAGS_CHANGED用于表示flags发生了变化，关于此的详细内容请看后文。intFLAG_ALLOW_LOCK_WHILE_SCREEN_ONWindow flag: as long as this window is visible to the user, allow the lock screen to activate while the screen is on.
当该window对用户可见的时候，允许锁屏。intFLAG_ALT_FOCUSABLE_IMWindow flag: invert the state of FLAG_NOT_FOCUSABLE with respect to how this window interacts with the current method.intFLAG_BLUR_BEHINDWindow flag: blur everything behind this window.
让该window后所有东西都模糊（blur）intFLAG_DIM_BEHINDWindow flag: everything behind this window will be dimmed.
让该window后所有的东西都成暗淡（dim）intFLAG_DISMISS_KEYGUARDWindow flag: when set the window will cause the keyguard to be dismissed, 
only if it is not a secure lock keyguard.intFLAG_DITHERWindow flag: turn on dithering when compositing this window to the screen.
开启抖动（dithering）intFLAG_FORCE_NOT_FULLSCREENWindow flag: Override {@link #FLAG_FULLSCREEN and force the screen decorations (such as status bar) to be shown.
恢复window非全屏显示intFLAG_FULLSCREENWindow flag: Hide all screen decorations (e.g.
让window进行全屏显示intFLAG_HARDWARE_ACCELERATED

Indicates whether this window should be hardware accelerated.

对该window进行硬件加速.

该flag必须在设置你的Activity或Dialog的Content View之前进行设置，

而且如果你在mainfest文件中用android:hardwareAccelerated开启了该属性的话，那么你在程序中就不能再改变它。mainfest文件中android:hardwareAccelerated属性默认是开启的("true")。

intFLAG_IGNORE_CHEEK_PRESSESWindow flag: intended for windows that will often be used when the user is holding the screen against their face, it will aggressively filter the event stream to prevent unintended presses in this situation that may not be desired for a particular window, when such an event stream is detected, the application will receive a CANCEL motion event to indicate this so applications can handle this accordingly by taking no action on the event until the finger is released.intFLAG_KEEP_SCREEN_ONWindow flag: as long as this window is visible to the user, keep the device's screen turned on and bright.
当该window对用户可见时，让设备屏幕处于高亮（bright）状态。intFLAG_LAYOUT_INSET_DECORWindow flag: a special option only for use in combination with FLAG_LAYOUT_IN_SCREEN.intFLAG_LAYOUT_IN_SCREENWindow flag: place the window within the entire screen, ignoring decorations around the border (a.k.a.
让window占满整个手机屏幕，不留任何边界（border）intFLAG_LAYOUT_NO_LIMITSWindow flag: allow window to extend outside of the screen.
window大小不再不受手机屏幕大小限制，即window可能超出屏幕之外，这时部分内容在屏幕之外。intFLAG_NOT_FOCUSABLEWindow flag: this window won't ever get key input focus, so the user can not send key or other button events to it.
让window不能获得焦点，这样用户快就不能向该window发送按键事件及按钮事件intFLAG_NOT_TOUCHABLEWindow flag: this window can never receive touch events.
让该window不接受触摸屏事件intFLAG_NOT_TOUCH_MODALWindow flag: Even when this window is focusable (its {@link #FLAG_NOT_FOCUSABLE is not set), 
allow any pointer events outside of the window to be sent to the windows behind it.
即使在该window在可获得焦点情况下，仍然把该window之外的任何event发送到该window之后的其他window.intFLAG_SCALEDWindow flag: a special mode where the layout parameters are used to perform scaling of the surface when it is composited to the screen.intFLAG_SECUREWindow flag: don't allow screen shots while this window is displayed.
当该window在进行显示的时候，不允许截屏。intFLAG_SHOW_WALLPAPERWindow flag: ask that the system wallpaper be shown behind your window.
在该window后显示系统的墙纸（wallpaper）intFLAG_SHOW_WHEN_LOCKEDWindow flag: special flag to let windows be shown when the screen is locked.
当锁屏的时候，显示该window.intFLAG_SPLIT_TOUCHWindow flag: when set the window will accept for touch events outside of its bounds to be sent to other windows that also support split touch. When this flag is not set, the first pointer that goes down determines the window to which all subsequent touches go until all pointers go up. When this flag is set, each pointer (not necessarily the first) that goes down determines the window to which all subsequent touches of that pointer will go until that pointer goes up thereby enabling touches with multiple pointers to be split across multiple windows
当该window在可以接受触摸屏情况下，让因在该window之外，而发送到后面的window的触摸屏可以支持split touch.intFLAG_TOUCHABLE_WHEN_WAKINGWindow flag: When set, if the device is asleep when the touch screen is pressed, you will receive this first touch event.
当手机处于睡眠状态时，如果屏幕被按下，那么该window将第一个收到到事件intFLAG_TURN_SCREEN_ONWindow flag: when set as a window is being added or made visible, once the window has been shown then the system will poke the power manager's user activity (as if the user had woken up the device) to turn the screen on.
当然window被显示的时候，系统将把它当做一个用户活动事件，以点亮手机屏幕。intFLAG_WATCH_OUTSIDE_TOUCHWindow flag: if you have set FLAG_NOT_TOUCH_MODAL, you can set this flag to receive a single special MotionEvent with the action MotionEvent.ACTION_OUTSIDE 
for touches that occur outside of your window.
如果你设置了该flag,那么在你FLAG_NOT_TOUNCH_MODAL的情况下，即使触摸屏事件发送在该window之外，其事件被发送到了后面的window,那么该window仍然将以MotionEvent.ACTION_OUTSIDE形式收到该触摸屏事件

softInputMode系列

该系列主要用于表示softInputMode，我们可以通过WindowManager.LayoutParams的softInputMode变量直接进行设置。softInputMode只能是一个显示软键盘时的window调整方式bite与一个控制软键盘显示状态的bite的组合。

显示软键盘时的window调整方式可以是SOFT_INPUT_ADJUST_NOTHING，SOFT_INPUT_ADJUST_PAN，

SOFT_INPUT_ADJUST_RESIZE，SOFT_INPUT_ADJUST_UNSPECIFIED之一。

用于描述软键盘显示的规则可以是SOFT_INPUT_STATE_ALWAYS_HIDDEN，SOFT_INPUT_STATE_ALWAYS_VISIBLE，

SOFT_INPUT_STATE_HIDDEN，SOFT_INPUT_STATE_VISIBLE，SOFT_INPUT_STATE_UNSPECIFIED之一

关于softInputMode的更多知识请参考《软件盘的开关》

所有的softInputMode系列常量如下：

intSOFT_INPUT_ADJUST_NOTHINGAdjustment option for softInputMode: set to have a window not adjust for a shown input method.
当显示软键盘时，不调整window的布局intSOFT_INPUT_ADJUST_PANAdjustment option for softInputMode: set to have a window pan when an input method is shown, so it doesn't need to deal with resizing but just panned by the framework to ensure the current input focus is visible.
当显示软键盘时，调整window的空白区域来显示软键盘。即使调整空白区域，软键盘还是有可能遮挡一些有内容区域，这时用户就只有退出软键盘才能看到这些被遮挡区域并进行交互。intSOFT_INPUT_ADJUST_RESIZEAdjustment option for softInputMode: set to allow the window to be resized when an input method is shown, so that its contents are not covered by the input method.
当显示软键盘时，调整window内的控件大小以便显示软键盘。这样的话控件可能会变形。intSOFT_INPUT_ADJUST_UNSPECIFIEDAdjustment option for softInputMode: nothing specified.
不指定显示软件盘时，window的调整方式。intSOFT_INPUT_IS_FORWARD_NAVIGATIONBit for softInputMode: set when the user has navigated forward to the window.
表示用户导航（navigate）到了你的windowintSOFT_INPUT_MASK_ADJUSTMask for softInputMode of the bits that determine the way that the window should be adjusted to accommodate the soft input window.
显示软键盘时，用于表示window调整方式的bite的mask。
显示软键盘时的window调整方式可以是SOFT_INPUT_ADJUST_NOTHING，SOFT_INPUT_ADJUST_PAN，SOFT_INPUT_ADJUST_RESIZE，SOFT_INPUT_ADJUST_UNSPECIFIED。
用于描述软键盘显示的规则可以是SOFT_INPUT_STATE_ALWAYS_HIDDEN，SOFT_INPUT_STATE_ALWAYS_VISIBLE，
SOFT_INPUT_STATE_HIDDEN，SOFT_INPUT_STATE_VISIBLE，SOFT_INPUT_STATE_UNSPECIFIED之一intSOFT_INPUT_MASK_STATEMask for softInputMode of the bits that determine the desired visibility state of the soft input area for this window.
用于描述软键盘显示规则的bite的mask.intSOFT_INPUT_MODE_CHANGED用于表示softInputMode发生了变化。关于此的详细内容请看后文。intSOFT_INPUT_STATE_ALWAYS_HIDDENVisibility state for softInputMode: 
please always hide any soft input area when this window receives focus.
总是隐藏软键盘。intSOFT_INPUT_STATE_ALWAYS_VISIBLEVisibility state for softInputMode:
 please always make the soft input area visible when this window receives input focus.
总是显示软键盘intSOFT_INPUT_STATE_HIDDENVisibility state for softInputMode: 
please hide any soft input area when normally appropriate (when the user is navigating forward to your window).
用户导航（navigate）到你的窗口的时候,隐藏软键盘intSOFT_INPUT_STATE_UNCHANGEDVisibility state for softInputMode: please don't change the state of the soft input area.intSOFT_INPUT_STATE_UNSPECIFIEDVisibility state for softInputMode: no state has been specified.
没有软键盘显示的约定规则intSOFT_INPUT_STATE_VISIBLEVisibility state for softInputMode: please show the soft input area when normally appropriate 
(when the user is navigating forward to your window).
用户导航（navigate）到你的窗口的时候，显示软键盘

Window type系列

该系列主要用于表示window的类型。我们可以通过WindowManager.LayoutParams的type变量直接进行设置.

intTYPE_APPLICATIONWindow type: a normal application window.
普通的应用程序window，token必须设置为Activity的token，以指出该窗口属谁intTYPE_APPLICATION_ATTACHED_DIALOGWindow type: like TYPE_APPLICATION_PANEL, but layout of the window happens as that of a top-level window, not as a child of its container.
对话框。类似于面板窗口，绘制类似于顶层窗口，而不是宿主的子窗口。intTYPE_APPLICATION_MEDIAWindow type: window for showing media (e.g.
媒体窗口，例如视频。显示于宿主窗口下层。intTYPE_APPLICATION_PANELWindow type: a panel on top of an application window.
面板窗口，显示于宿主窗口上层intTYPE_APPLICATION_STARTINGWindow type: special application window that is displayed while the application is starting.
用于应用程序启动时所显示的窗口。应用本身不要使用这种类型。它用于让系统显示些信息，直到应用程序可以开启自己的窗口intTYPE_APPLICATION_SUB_PANELWindow type: a sub-panel on top of an application window.
应用程序窗口的子面板。显示于所有面板窗口的上层。（GUI的一般规律，越“子”越靠上）intTYPE_BASE_APPLICATIONWindow type: an application window that serves as the "base" window of the overall application; all other application windows will appear on top of it.
所有程序窗口的“基地”窗口，其他应用程序窗口都显示在它上面。 intTYPE_CHANGED表示window的类型发生了变化，关于此的详细内容请看后文。intTYPE_INPUT_METHODWindow type: internal input methods windows, which appear above the normal UI.
内部输入法窗口，显示于普通UI之上。应用程序可重新布局以免被此窗口覆盖intTYPE_INPUT_METHOD_DIALOGWindow type: internal input methods dialog windows, which appear above the current input method window.
内部输入法对话框，显示于当前输入法窗口之上intTYPE_KEYGUARDWindow type: keyguard window.
锁屏窗口intTYPE_KEYGUARD_DIALOGWindow type: dialogs that the keyguard shows
锁屏时显示的对话框intTYPE_PHONEWindow type: phone.
电话窗口。它用于电话交互（特别是呼入）。它置于所有应用程序之上，状态栏之下。intTYPE_PRIORITY_PHONEWindow type: priority phone UI, which needs to be displayed even if the keyguard is active.
电话优先，当锁屏时显示。此窗口不能获得输入焦点，否则影响锁屏。intTYPE_SEARCH_BARWindow type: the search bar.
搜索栏。只能有一个搜索栏；它位于屏幕上方。intTYPE_STATUS_BARWindow type: the status bar.
状态栏类型的window。只能有一个状态栏window；它位于屏幕顶端，其他窗口都位于它下方。intTYPE_STATUS_BAR_PANELWindow type: panel that slides out from over the status bar
状态栏的滑动面板intTYPE_SYSTEM_ALERTWindow type: system window, such as low power alert.
系统提示window,比如电池低的警告。它总是出现在应用程序窗口之上。intTYPE_SYSTEM_DIALOGWindow type: panel that slides out from the status bar
系统对话框。（例如音量调节框）intTYPE_SYSTEM_ERRORWindow type: internal system error windows, appear on top of everything they can.
系统内部错误提示，显示于所有内容之上intTYPE_SYSTEM_OVERLAYWindow type: system overlay windows, which need to be displayed on top of everything else.
系统顶层窗口。显示在其他一切内容之上。此窗口不能获得输入焦点，否则影响锁屏。intTYPE_TOASTWindow type: transient notifications.
toast类型的windowintTYPE_WALLPAPERWindow type: wallpaper window, 
placed behind any window that wants to sit on top of the wallpaper.
用于墙纸的window

window 的类型被分为了3大类:

Application windows (ranging from FIRST_APPLICATION_WINDOW to LAST_APPLICATION_WINDOW) are normal top-level application windows. For these types of windows, the token must be set to the token of the activity they are a part of (this will normally be done for you if token is null).

Sub-windows (ranging from FIRST_SUB_WINDOW to LAST_SUB_WINDOW) are associated with another top-level window. For these types of windows, the token must be the token of the window it is attached to.

System windows (ranging from FIRST_SYSTEM_WINDOW to LAST_SYSTEM_WINDOW) are special types of windows for use by the system for specific purposes. They should not normally be used by applications, and a special permission is required to use them.

系统专门定义了FIRST_APPLICATION_WINDOW , LAST_APPLICATION_WINDOW,FIRST_SUB_WINDOW, LAST_SUB_WINDOW,

FIRST_SYSTEM_WINDOW,LAST_SYSTEM_WINDOW 以表示window的3大类型的类型的取值的范围。

intFIRST_APPLICATION_WINDOWStart of window types that represent normal application windows.
Constant Value: 1 (0x00000001)intFIRST_SUB_WINDOWStart of types of sub-windows.
Constant Value: 1000 (0x000003e8)intFIRST_SYSTEM_WINDOWStart of system-specific window types.
Constant Value: 2000 (0x000007d0)

intLAST_APPLICATION_WINDOWEnd of types of application windows.
Constant Value: 99 (0x00000063)intLAST_SUB_WINDOWEnd of types of sub-windows.
Constant Value: 1999 (0x000007cf)intLAST_SYSTEM_WINDOWEnd of types of system windows.
Constant Value: 2999 (0x00000bb7)