File	Doc	Category	Size	Date	Package
ViewConfiguration.java	API Doc	Android 1.5 API	13595	Wed May 06 22:41:56 BST 2009	android.view

ViewConfiguration

• java.lang.Object

Fields Summary
private static final int	SCROLL_BAR_SIZE Defines the width of the horizontal scrollbar and the height of the vertical scrollbar in pixels
private static final int	FADING_EDGE_LENGTH Defines the length of the fading edges in pixels
private static final int	PRESSED_STATE_DURATION Defines the duration in milliseconds of the pressed state in child components.
private static final int	LONG_PRESS_TIMEOUT Defines the duration in milliseconds before a press turns into a long press
private static final int	GLOBAL_ACTIONS_KEY_TIMEOUT Defines the duration in milliseconds a user needs to hold down the appropriate button to bring up the global actions dialog (power off, lock screen, etc).
private static final int	TAP_TIMEOUT Defines the duration in milliseconds we will wait to see if a touch event is a tap or a scroll. If the user does not move within this interval, it is considered to be a tap.
private static final int	JUMP_TAP_TIMEOUT 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.
private static final int	DOUBLE_TAP_TIMEOUT Defines the duration in milliseconds between the first tap's up event and the second tap's down event for an interaction to be considered a double-tap.
private static final int	ZOOM_CONTROLS_TIMEOUT Defines the duration in milliseconds we want to display zoom controls in response to a user panning within an application.
private static final int	EDGE_SLOP Inset in pixels to look for touchable content when the user touches the edge of the screen
private static final int	TOUCH_SLOP Distance a touch can wander before we think the user is scrolling in pixels
private static final int	DOUBLE_TAP_SLOP Distance between the first touch and second touch to still be considered a double tap
private static final int	WINDOW_TOUCH_SLOP Distance a touch needs to be outside of a window's bounds for it to count as outside for purposes of dismissing the window.
private static final int	MINIMUM_FLING_VELOCITY Minimum velocity to initiate a fling, as measured in pixels per second
private static final int	MAXIMUM_DRAWING_CACHE_SIZE The maximum size of View's drawing cache, expressed in bytes. This size should be at least equal to the size of the screen in ARGB888 format.
private static float	SCROLL_FRICTION The coefficient of friction applied to flings/scrolls.
private final int	mEdgeSlop
private final int	mFadingEdgeLength
private final int	mMinimumFlingVelocity
private final int	mScrollbarSize
private final int	mTouchSlop
private final int	mDoubleTapSlop
private final int	mWindowTouchSlop
private final int	mMaximumDrawingCacheSize
private static final android.util.SparseArray	sConfigurations

Constructors Summary
public ViewConfiguration() deprecated Use {@link android.view.ViewConfiguration#get(android.content.Context)} instead. mEdgeSlop = EDGE_SLOP; mFadingEdgeLength = FADING_EDGE_LENGTH; mMinimumFlingVelocity = MINIMUM_FLING_VELOCITY; mScrollbarSize = SCROLL_BAR_SIZE; mTouchSlop = TOUCH_SLOP; mDoubleTapSlop = DOUBLE_TAP_SLOP; mWindowTouchSlop = WINDOW_TOUCH_SLOP; //noinspection deprecation mMaximumDrawingCacheSize = MAXIMUM_DRAWING_CACHE_SIZE;
private ViewConfiguration(android.content.Context context) Creates a new configuration for the specified context. The configuration depends on various parameters of the context, like the dimension of the display or the density of the display. param context The application context used to initialize this view configuration. see #get(android.content.Context) see android.util.DisplayMetrics final DisplayMetrics metrics = context.getResources().getDisplayMetrics(); final float density = metrics.density; mEdgeSlop = (int) (density * EDGE_SLOP + 0.5f); mFadingEdgeLength = (int) (density * FADING_EDGE_LENGTH + 0.5f); mMinimumFlingVelocity = (int) (density * MINIMUM_FLING_VELOCITY + 0.5f); mScrollbarSize = (int) (density * SCROLL_BAR_SIZE + 0.5f); mTouchSlop = (int) (density * TOUCH_SLOP + 0.5f); mDoubleTapSlop = (int) (density * DOUBLE_TAP_SLOP + 0.5f); mWindowTouchSlop = (int) (density * WINDOW_TOUCH_SLOP + 0.5f); // Size of the screen in bytes, in ARGB_8888 format mMaximumDrawingCacheSize = 4 * metrics.widthPixels * metrics.heightPixels;

Methods Summary
public static android.view.ViewConfiguration	get(android.content.Context context) Returns a configuration for the specified context. The configuration depends on various parameters of the context, like the dimension of the display or the density of the display. param context The application context used to initialize the view configuration. final DisplayMetrics metrics = context.getResources().getDisplayMetrics(); final int density = (int) (100.0f * metrics.density); ViewConfiguration configuration = sConfigurations.get(density); if (configuration == null) { configuration = new ViewConfiguration(context); sConfigurations.put(density, configuration); } return configuration;
public static int	getDoubleTapSlop() return Distance between the first touch and second touch to still be considered a double tap deprecated Use {@link #getScaledDoubleTapSlop()} instead. hide The only client of this should be GestureDetector, which needs this for clients that still use its deprecated constructor. return DOUBLE_TAP_SLOP;
public static int	getDoubleTapTimeout() return the duration in milliseconds between the first tap's up event and the second tap's down event for an interaction to be considered a double-tap. return DOUBLE_TAP_TIMEOUT;
public static int	getEdgeSlop() return Inset in pixels to look for touchable content when the user touches the edge of the screen deprecated Use {@link #getScaledEdgeSlop()} instead. return EDGE_SLOP;
public static int	getFadingEdgeLength() return the length of the fading edges in pixels deprecated Use {@link #getScaledFadingEdgeLength()} instead. return FADING_EDGE_LENGTH;
public static long	getGlobalActionKeyTimeout() The amount of time a user needs to press the relevant key to bring up the global actions dialog. return how long a user needs to press the relevant key to bring up the global actions dialog. return GLOBAL_ACTIONS_KEY_TIMEOUT;
public static int	getJumpTapTimeout() return the duration in milliseconds we will wait to see if a touch event is a jump tap. If the user does not move within this interval, it is considered to be a tap. return JUMP_TAP_TIMEOUT;
public static int	getLongPressTimeout() return the duration in milliseconds before a press turns into a long press return LONG_PRESS_TIMEOUT;
public static int	getMaximumDrawingCacheSize() The maximum drawing cache size expressed in bytes. return the maximum size of View's drawing cache expressed in bytes deprecated Use {@link #getScaledMaximumDrawingCacheSize()} instead. //noinspection deprecation return MAXIMUM_DRAWING_CACHE_SIZE;
public static int	getMinimumFlingVelocity() return Minimum velocity to initiate a fling, as measured in pixels per second. deprecated Use {@link #getScaledMinimumFlingVelocity()} instead. return MINIMUM_FLING_VELOCITY;
public static int	getPressedStateDuration() return the duration in milliseconds of the pressed state in child components. return PRESSED_STATE_DURATION;
public int	getScaledDoubleTapSlop() return Distance between the first touch and second touch to still be considered a double tap return mDoubleTapSlop;
public int	getScaledEdgeSlop() return Inset in pixels to look for touchable content when the user touches the edge of the screen return mEdgeSlop;
public int	getScaledFadingEdgeLength() return the length of the fading edges in pixels return mFadingEdgeLength;
public int	getScaledMaximumDrawingCacheSize() The maximum drawing cache size expressed in bytes. return the maximum size of View's drawing cache expressed in bytes return mMaximumDrawingCacheSize;
public int	getScaledMinimumFlingVelocity() return Minimum velocity to initiate a fling, as measured in pixels per second. return mMinimumFlingVelocity;
public int	getScaledScrollBarSize() return The width of the horizontal scrollbar and the height of the vertical scrollbar in pixels return mScrollbarSize;
public int	getScaledTouchSlop() return Distance a touch can wander before we think the user is scrolling in pixels return mTouchSlop;
public int	getScaledWindowTouchSlop() return Distance a touch must be outside the bounds of a window for it to be counted as outside the window for purposes of dismissing that window. return mWindowTouchSlop;
public static int	getScrollBarSize() return The width of the horizontal scrollbar and the height of the vertical scrollbar in pixels deprecated Use {@link #getScaledScrollBarSize()} instead. return SCROLL_BAR_SIZE;
public static float	getScrollFriction() The amount of friction applied to scrolls and flings. return A scalar dimensionless value representing the coefficient of friction. return SCROLL_FRICTION;
public static int	getTapTimeout() return the duration in milliseconds we will wait to see if a touch event is a tap or a scroll. If the user does not move within this interval, it is considered to be a tap. return TAP_TIMEOUT;
public static int	getTouchSlop() return Distance a touch can wander before we think the user is scrolling in pixels deprecated Use {@link #getScaledTouchSlop()} instead. return TOUCH_SLOP;
public static int	getWindowTouchSlop() return Distance a touch must be outside the bounds of a window for it to be counted as outside the window for purposes of dismissing that window. deprecated Use {@link #getScaledWindowTouchSlop()} instead. return WINDOW_TOUCH_SLOP;
public static long	getZoomControlsTimeout() The amount of time that the zoom controls should be displayed on the screen expressed in milliseconds. return the time the zoom controls should be visible expressed in milliseconds. return ZOOM_CONTROLS_TIMEOUT;