/**
* 包含了方法和标准的常量用来设置UI的超时、大小和距离
*/
publicclassViewConfiguration {
// 设定水平滚动条的宽度和垂直滚动条的高度,单位是像素px
privatestaticfinalintSCROLL_BAR_SIZE =10;
//定义滚动条逐渐消失的时间,单位是毫秒
privatestaticfinalintSCROLL_BAR_FADE_DURATION =250;
// 默认的滚动条多少秒之后消失,单位是毫秒
privatestaticfinalintSCROLL_BAR_DEFAULT_DELAY =300;
// 定义边缘地方褪色的长度
privatestaticfinalintFADING_EDGE_LENGTH =12;
//定义子控件按下状态的持续事件
privatestaticfinalintPRESSED_STATE_DURATION =125;
//定义一个按下状态转变成长按状态的转变时间
privatestaticfinalintLONG_PRESS_TIMEOUT =500;
//定义用户在按住适当按钮,弹出全局的对话框的持续时间
privatestaticfinalintGLOBAL_ACTIONS_KEY_TIMEOUT =500;
//定义一个touch事件中是点击事件还是一个滑动事件所需的时间,如果用户在这个时间之内滑动,那么就认为是一个点击事件
privatestaticfinalintTAP_TIMEOUT =115;
/**
* Defines the duration in milliseconds we will wait to see if a touch event
* is a jump tap. If the user does not complete the jump tap within this interval, it is
* considered to be a tap.
*/
//定义一个touch事件时候是一个点击事件。如果用户在这个时间内没有完成这个点击,那么就认为是一个点击事件
privatestaticfinalintJUMP_TAP_TIMEOUT =500;
//定义双击事件的间隔时间
privatestaticfinalintDOUBLE_TAP_TIMEOUT =300;
//定义一个缩放控制反馈到用户界面的时间
privatestaticfinalintZOOM_CONTROLS_TIMEOUT =3000;
/**
* Inset in pixels to look for touchable content when the user touches the edge of the screen
*/
privatestaticfinalintEDGE_SLOP =12;
/**
* Distance a touch can wander before we think the user is scrolling in pixels
*/
privatestaticfinalintTOUCH_SLOP =16;
/**
* Distance a touch can wander before we think the user is attempting a paged scroll
* (in dips)
*/
privatestaticfinalintPAGING_TOUCH_SLOP = TOUCH_SLOP *2;
/**
* Distance between the first touch and second touch to still be considered a double tap
*/
privatestaticfinalintDOUBLE_TAP_SLOP =100;
/**
* Distance a touch needs to be outside of a window's bounds for it to
* count as outside for purposes of dismissing the window.
*/
privatestaticfinalintWINDOW_TOUCH_SLOP =16;
//用来初始化fling的最小速度,单位是每秒多少像素
privatestaticfinalintMINIMUM_FLING_VELOCITY =50;
//用来初始化fling的最大速度,单位是每秒多少像素
privatestaticfinalintMAXIMUM_FLING_VELOCITY =4000;
//视图绘图缓存的最大尺寸,以字节表示。在ARGB888格式下,这个尺寸应至少等于屏幕的大小
@Deprecated
privatestaticfinalintMAXIMUM_DRAWING_CACHE_SIZE =320*480*4;// HVGA screen, ARGB8888
//flings和scrolls摩擦力度大小的系数
privatestaticfloatSCROLL_FRICTION =0.015f;
/**
* Max distance to over scroll for edge effects
*/
privatestaticfinalintOVERSCROLL_DISTANCE =0;
/**
* Max distance to over fling for edge effects
*/
privatestaticfinalintOVERFLING_DISTANCE =4;
}
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