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WindowManager.LayoutParams（上）

2013年02月04日 ⁄ 综合 ⁄ 共 4056字 ⁄ 字号小中大 ⁄ 评论关闭

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：

int FLAGS_CHANGED 用于表示flags发生了变化，关于此的详细内容请看后文。

int FLAG_ALLOW_LOCK_WHILE_SCREEN_ON Window 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。

int FLAG_ALT_FOCUSABLE_IM Window flag: invert the state of FLAG_NOT_FOCUSABLE with
respect to how this window interacts with the current method.

int FLAG_BLUR_BEHIND Window flag: blur everything behind this window.
让该window后所有东西都模糊（blur）

int FLAG_DIM_BEHIND Window flag: everything behind this window will be dimmed.
让该window后所有的东西都成暗淡（dim）

int FLAG_DISMISS_KEYGUARD Window flag: when set the window will cause the keyguard to be dismissed,
only if it is not a secure lock keyguard.

int FLAG_DITHER Window flag: turn on dithering when compositing this window to the screen.
开启抖动（dithering）

int FLAG_FORCE_NOT_FULLSCREEN Window 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

int FLAG_FULLSCREEN Window flag: Hide all screen decorations (e.g.
让window进行全屏显示

int

FLAG_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")。

int FLAG_IGNORE_CHEEK_PRESSES Window 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.

int FLAG_KEEP_SCREEN_ON Window 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。

int FLAG_LAYOUT_INSET_DECOR Window flag: a special option only for use in combination with FLAG_LAYOUT_IN_SCREEN.

int FLAG_LAYOUT_IN_SCREEN Window 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）

int FLAG_LAYOUT_NO_LIMITS Window 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。

int FLAG_NOT_FOCUSABLE Window 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

int FLAG_NOT_TOUCHABLE Window flag: this window can never receive touch events.
让该window不接受触摸屏事件

int FLAG_NOT_TOUCH_MODAL Window 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.

int FLAG_SCALED Window flag: a special mode where the layout parameters are used to perform scaling of the surface when it is composited to the screen.

int FLAG_SECURE Window 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。

int