本文参照自：http://developer.android.com/reference/android/view/WindowManager.LayoutParams.html
BRIGHTNESS系列
该系列主要用于设置window的brightness(screenBrightness/buttonBrightness)。我们可以通过WindowManager.LayoutParams的screenBrightness/buttonBrightness变量直接进行设置。
其中screenBrightness表示屏幕的brightness,而buttonBrightness表示一般按键和键盘按键的brightness
| float | BRIGHTNESS_OVERRIDE_FULL |
Value for screenBrightness and buttonBrightness indicating that the screen or button backlight brightness should be set to the hightest value when this window is in front. 把brightness(screenBrightness/buttonBrightness)设置到最高值。 |
| float | BRIGHTNESS_OVERRIDE_NONE |
Default value for screenBrightness and buttonBrightness indicatingthat the brightness value is not overridden for this window and normal brightness policy should be used. 不对brightness(screenBrightness/buttonBrightness)重新进行设置，采用默认的普通值。 |
| float | BRIGHTNESS_OVERRIDE_OFF |
Value for screenBrightness and buttonBrightness indicatingthat the screen or button backlight brightness should be set to the lowest value when this window is in front. 把brightness(screenBrightness/buttonBrightness)设置到最低值。 |
changed系列
该系列主要用于 int copyFrom (WindowManager.LayoutParams o)函数中。
在函数中，首先将用参数中传入的WindowManager.LayoutParams的信息复制到本WindowManager.LayoutParams中，然后返回一个整数，以bite形式表示调用该函数后WindowManager.LayoutParams的哪些信息发送了变化
| int | ALPHA_CHANGED | 用于表示成员变量alpha是否被改变 |
| int | ANIMATION_CHANGED | 用于表示成员变量windowAnimations是否被改变 |
| int | DIM_AMOUNT_CHANGED | 用于表示成员变量dimAmount是否被改变 |
| int | FLAGS_CHANGED | 用于表示成员变量flags是否被改变 |
| int | LAYOUT_CHANGED |
用于表示layout是否被改变.这里的layout是指以下变量所包含的信息： width，height,x,y, verticalMargin，verticalWeight,horizontalMargin，horizontalWeight |
| int | SCREEN_BRIGHTNESS_CHANGED |
用于表示brightness是否被改变. 这里的brightness是指以下变量对应的信息：screenBrightness，buttonBrightness |
| int | SCREEN_ORIENTATION_CHANGED | 用于表示成员变量screenOrientation是否被改变 |
| int | SOFT_INPUT_MODE_CHANGED | 用于表示成员变量softInputMode是否被改变 |
| int | TITLE_CHANGED | 用于表示成员变量title是否被改变 |
| int | TYPE_CHANGED | 用于表示成员变量type是否被改变 |
| int | FORMAT_CHANGED |
Constant Value: 8 (0x00000008) 用于表示成员变量format是否被改变 |
成员变量
继承于ViewGroup.LayoutParams的成员变量
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height | Information about how tall the view wants to be. |
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layoutAnimationParameters | Used to animate layouts. |
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width | Information about how wide the view wants to be. |
自身的成员变量
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CREATOR | ||
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alpha | An alpha value to apply to this entire window. | |
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buttonBrightness | This can be used to override the standard behavior of the button and keyboard backlights. | |
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dimAmount |
When FLAG_DIM_BEHIND isset, this is the amount of dimming to apply. |
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