程序包 rtc

类 WhiteboardDrawView

java.lang.Object

android.view.View

rtc.WhiteboardDrawView

所有已实现的接口:

android.graphics.drawable.Drawable.Callback, android.view.accessibility.AccessibilityEventSource, android.view.KeyEvent.Callback

public class WhiteboardDrawView
extends android.view.View

白板绘制管理

嵌套类概要

嵌套类

修饰符和类型	类	说明
static class	WhiteboardDrawView.BitmapBean	白板背景图
class	WhiteboardDrawView.DrawViewBean	白板注释对象
static interface	WhiteboardDrawView.IUploadAnnotationInternalListener	上传注释接口
static interface	WhiteboardDrawView.IWhiteboardTouchEventNotify	白板触摸事件回调接口
static enum	WhiteboardDrawView.LaserPenSize	激光笔显示尺寸枚举
static @interface	WhiteboardDrawView.MGravity	白板背景图片位置
class	WhiteboardDrawView.MyGestureDetectorListener	触摸事件监听接口
static enum	WhiteboardDrawView.ToolType	绘制工具类型

从类继承的嵌套类/接口 android.view.View

android.view.View.AccessibilityDelegate, android.view.View.BaseSavedState, android.view.View.DragShadowBuilder, android.view.View.MeasureSpec, android.view.View.OnApplyWindowInsetsListener, android.view.View.OnAttachStateChangeListener, android.view.View.OnCapturedPointerListener, android.view.View.OnClickListener, android.view.View.OnContextClickListener, android.view.View.OnCreateContextMenuListener, android.view.View.OnDragListener, android.view.View.OnFocusChangeListener, android.view.View.OnGenericMotionListener, android.view.View.OnHoverListener, android.view.View.OnKeyListener, android.view.View.OnLayoutChangeListener, android.view.View.OnLongClickListener, android.view.View.OnScrollChangeListener, android.view.View.OnSystemUiVisibilityChangeListener, android.view.View.OnTouchListener, android.view.View.OnUnhandledKeyEventListener

字段概要

字段

修饰符和类型	字段	说明
boolean	isDrawToolViewVisible

从类继承的字段 android.view.View

ACCESSIBILITY_LIVE_REGION_ASSERTIVE, ACCESSIBILITY_LIVE_REGION_NONE, ACCESSIBILITY_LIVE_REGION_POLITE, ALPHA, AUTOFILL_FLAG_INCLUDE_NOT_IMPORTANT_VIEWS, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DATE, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_DAY, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_MONTH, AUTOFILL_HINT_CREDIT_CARD_EXPIRATION_YEAR, AUTOFILL_HINT_CREDIT_CARD_NUMBER, AUTOFILL_HINT_CREDIT_CARD_SECURITY_CODE, AUTOFILL_HINT_EMAIL_ADDRESS, AUTOFILL_HINT_NAME, AUTOFILL_HINT_PASSWORD, AUTOFILL_HINT_PHONE, AUTOFILL_HINT_POSTAL_ADDRESS, AUTOFILL_HINT_POSTAL_CODE, AUTOFILL_HINT_USERNAME, AUTOFILL_TYPE_DATE, AUTOFILL_TYPE_LIST, AUTOFILL_TYPE_NONE, AUTOFILL_TYPE_TEXT, AUTOFILL_TYPE_TOGGLE, DRAG_FLAG_GLOBAL, DRAG_FLAG_GLOBAL_PERSISTABLE_URI_PERMISSION, DRAG_FLAG_GLOBAL_PREFIX_URI_PERMISSION, DRAG_FLAG_GLOBAL_URI_READ, DRAG_FLAG_GLOBAL_URI_WRITE, DRAG_FLAG_OPAQUE, DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_HIGH, DRAWING_CACHE_QUALITY_LOW, FIND_VIEWS_WITH_CONTENT_DESCRIPTION, FIND_VIEWS_WITH_TEXT, FOCUS_BACKWARD, FOCUS_DOWN, FOCUS_FORWARD, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_UP, FOCUSABLE, FOCUSABLE_AUTO, FOCUSABLES_ALL, FOCUSABLES_TOUCH_MODE, GONE, HAPTIC_FEEDBACK_ENABLED, IMPORTANT_FOR_ACCESSIBILITY_AUTO, IMPORTANT_FOR_ACCESSIBILITY_NO, IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS, IMPORTANT_FOR_ACCESSIBILITY_YES, IMPORTANT_FOR_AUTOFILL_AUTO, IMPORTANT_FOR_AUTOFILL_NO, IMPORTANT_FOR_AUTOFILL_NO_EXCLUDE_DESCENDANTS, IMPORTANT_FOR_AUTOFILL_YES, IMPORTANT_FOR_AUTOFILL_YES_EXCLUDE_DESCENDANTS, INVISIBLE, KEEP_SCREEN_ON, LAYER_TYPE_HARDWARE, LAYER_TYPE_NONE, LAYER_TYPE_SOFTWARE, LAYOUT_DIRECTION_INHERIT, LAYOUT_DIRECTION_LOCALE, LAYOUT_DIRECTION_LTR, LAYOUT_DIRECTION_RTL, MEASURED_HEIGHT_STATE_SHIFT, MEASURED_SIZE_MASK, MEASURED_STATE_MASK, MEASURED_STATE_TOO_SMALL, NO_ID, NOT_FOCUSABLE, OVER_SCROLL_ALWAYS, OVER_SCROLL_IF_CONTENT_SCROLLS, OVER_SCROLL_NEVER, ROTATION, ROTATION_X, ROTATION_Y, SCALE_X, SCALE_Y, SCREEN_STATE_OFF, SCREEN_STATE_ON, SCROLL_AXIS_HORIZONTAL, SCROLL_AXIS_NONE, SCROLL_AXIS_VERTICAL, SCROLL_INDICATOR_BOTTOM, SCROLL_INDICATOR_END, SCROLL_INDICATOR_LEFT, SCROLL_INDICATOR_RIGHT, SCROLL_INDICATOR_START, SCROLL_INDICATOR_TOP, SCROLLBAR_POSITION_DEFAULT, SCROLLBAR_POSITION_LEFT, SCROLLBAR_POSITION_RIGHT, SCROLLBARS_INSIDE_INSET, SCROLLBARS_INSIDE_OVERLAY, SCROLLBARS_OUTSIDE_INSET, SCROLLBARS_OUTSIDE_OVERLAY, SOUND_EFFECTS_ENABLED, STATUS_BAR_HIDDEN, STATUS_BAR_VISIBLE, SYSTEM_UI_FLAG_FULLSCREEN, SYSTEM_UI_FLAG_HIDE_NAVIGATION, SYSTEM_UI_FLAG_IMMERSIVE, SYSTEM_UI_FLAG_IMMERSIVE_STICKY, SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN, SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION, SYSTEM_UI_FLAG_LAYOUT_STABLE, SYSTEM_UI_FLAG_LIGHT_NAVIGATION_BAR, SYSTEM_UI_FLAG_LIGHT_STATUS_BAR, SYSTEM_UI_FLAG_LOW_PROFILE, SYSTEM_UI_FLAG_VISIBLE, SYSTEM_UI_LAYOUT_FLAGS, TEXT_ALIGNMENT_CENTER, TEXT_ALIGNMENT_GRAVITY, TEXT_ALIGNMENT_INHERIT, TEXT_ALIGNMENT_TEXT_END, TEXT_ALIGNMENT_TEXT_START, TEXT_ALIGNMENT_VIEW_END, TEXT_ALIGNMENT_VIEW_START, TEXT_DIRECTION_ANY_RTL, TEXT_DIRECTION_FIRST_STRONG, TEXT_DIRECTION_FIRST_STRONG_LTR, TEXT_DIRECTION_FIRST_STRONG_RTL, TEXT_DIRECTION_INHERIT, TEXT_DIRECTION_LOCALE, TEXT_DIRECTION_LTR, TEXT_DIRECTION_RTL, TRANSLATION_X, TRANSLATION_Y, TRANSLATION_Z, VISIBLE, X, Y, Z

构造器概要

构造器

构造器	说明
WhiteboardDrawView(android.content.Context context)
WhiteboardDrawView(android.content.Context context, android.util.AttributeSet attrs)
WhiteboardDrawView(android.content.Context context, android.util.AttributeSet attrs, int defStyleAttr)
WhiteboardDrawView(android.content.Context context, WhiteboardView whiteboardView, MWhiteboard.Whiteboard whiteboard, LinkedList<String> annotationList, boolean isLocalWhiteboard)

方法概要

修饰符和类型	方法	说明
void	clearBitmap()	清空背景图片
void	clearPaint()	清除绘制的内容
void	drawBitmap(android.graphics.Bitmap bitmap, int gravity)	绘制背景图片
void	drawBitmap(android.graphics.Bitmap bitmap, int left, int top, int right, int bottom)	绘制背景图片
void	drawText(String text)	绘制文本
WhiteboardDrawView	enableInterceptTouchEvent(boolean isIntercept)	设置拦截触摸事件
static float	getScale()	获取白板放大倍数
WhiteboardDrawView.ToolType	getToolType()	获取工具类型
boolean	hasBitmap()	是否绘制背景图
void	hideBitmap(boolean isHide)	隐藏背景图
boolean	isHideBitmap()	是否隐藏背景图
boolean	isInterceptTouchEvent()	是否拦截触摸事件
boolean	onTouchEvent(android.view.MotionEvent event)
void	onTouchEventLine(int action)	画 曲线、荧光笔线、箭头
void	onTouchEventText(int action)	绘制文本
void	redo()	回退上一条的绘制
void	refreshView()	刷新白板
void	removeBitmap(android.graphics.Bitmap bitmap)	清空背景图
void	setDrawToolViewVisible(boolean isVisible)	显示工具栏
void	setLaserPenSize(WhiteboardDrawView.LaserPenSize size)	设置激光笔的大小尺寸
void	setTextSize(int textSize)	设置文本的字体大小
void	setWhiteboardColor(int color)	设置白板画布的背景颜色
void	undo()	取消上一步的绘制

从类继承的方法 android.view.View

addChildrenForAccessibility, addExtraDataToAccessibilityNodeInfo, addFocusables, addFocusables, addKeyboardNavigationClusters, addOnAttachStateChangeListener, addOnLayoutChangeListener, addOnUnhandledKeyEventListener, addTouchables, animate, announceForAccessibility, autofill, autofill, bringToFront, buildDrawingCache, buildDrawingCache, buildLayer, callOnClick, cancelDragAndDrop, cancelLongPress, cancelPendingInputEvents, canResolveLayoutDirection, canResolveTextAlignment, canResolveTextDirection, canScrollHorizontally, canScrollVertically, checkInputConnectionProxy, clearAnimation, clearFocus, combineMeasuredStates, computeScroll, computeSystemWindowInsets, createAccessibilityNodeInfo, createContextMenu, destroyDrawingCache, dispatchApplyWindowInsets, dispatchCapturedPointerEvent, dispatchConfigurationChanged, dispatchDisplayHint, dispatchDragEvent, dispatchDrawableHotspotChanged, dispatchFinishTemporaryDetach, dispatchGenericMotionEvent, dispatchKeyEvent, dispatchKeyEventPreIme, dispatchKeyShortcutEvent, dispatchNestedFling, dispatchNestedPreFling, dispatchNestedPrePerformAccessibilityAction, dispatchNestedPreScroll, dispatchNestedScroll, dispatchPointerCaptureChanged, dispatchPopulateAccessibilityEvent, dispatchProvideAutofillStructure, dispatchProvideStructure, dispatchStartTemporaryDetach, dispatchSystemUiVisibilityChanged, dispatchTouchEvent, dispatchTrackballEvent, dispatchUnhandledMove, dispatchWindowFocusChanged, dispatchWindowSystemUiVisiblityChanged, dispatchWindowVisibilityChanged, draw, drawableHotspotChanged, findFocus, findViewById, findViewsWithText, findViewWithTag, focusSearch, forceHasOverlappingRendering, forceLayout, generateViewId, getAccessibilityClassName, getAccessibilityLiveRegion, getAccessibilityNodeProvider, getAccessibilityPaneTitle, getAccessibilityTraversalAfter, getAccessibilityTraversalBefore, getAlpha, getAnimation, getApplicationWindowToken, getAutofillHints, getAutofillId, getAutofillType, getAutofillValue, getBackground, getBackgroundTintList, getBackgroundTintMode, getBaseline, getBottom, getCameraDistance, getClipBounds, getClipBounds, getClipToOutline, getContentDescription, getContext, getDefaultFocusHighlightEnabled, getDefaultSize, getDisplay, getDrawableState, getDrawingCache, getDrawingCache, getDrawingCacheBackgroundColor, getDrawingCacheQuality, getDrawingRect, getDrawingTime, getElevation, getFilterTouchesWhenObscured, getFitsSystemWindows, getFocusable, getFocusables, getFocusedRect, getForeground, getForegroundGravity, getForegroundTintList, getForegroundTintMode, getGlobalVisibleRect, getGlobalVisibleRect, getHandler, getHasOverlappingRendering, getHeight, getHitRect, getHorizontalFadingEdgeLength, getId, getImportantForAccessibility, getImportantForAutofill, getKeepScreenOn, getKeyDispatcherState, getLabelFor, getLayerType, getLayoutDirection, getLayoutParams, getLeft, getLocalVisibleRect, getLocationInWindow, getLocationOnScreen, getMatrix, getMeasuredHeight, getMeasuredHeightAndState, getMeasuredState, getMeasuredWidth, getMeasuredWidthAndState, getMinimumHeight, getMinimumWidth, getNextClusterForwardId, getNextFocusDownId, getNextFocusForwardId, getNextFocusLeftId, getNextFocusRightId, getNextFocusUpId, getOnFocusChangeListener, getOutlineAmbientShadowColor, getOutlineProvider, getOutlineSpotShadowColor, getOverlay, getOverScrollMode, getPaddingBottom, getPaddingEnd, getPaddingLeft, getPaddingRight, getPaddingStart, getPaddingTop, getParent, getParentForAccessibility, getPivotX, getPivotY, getPointerIcon, getResources, getRevealOnFocusHint, getRight, getRootView, getRootWindowInsets, getRotation, getRotationX, getRotationY, getScaleX, getScaleY, getScrollBarDefaultDelayBeforeFade, getScrollBarFadeDuration, getScrollBarSize, getScrollBarStyle, getScrollIndicators, getScrollX, getScrollY, getSolidColor, getStateListAnimator, getSystemUiVisibility, getTag, getTag, getTextAlignment, getTextDirection, getTooltipText, getTop, getTouchables, getTouchDelegate, getTransitionName, getTranslationX, getTranslationY, getTranslationZ, getVerticalFadingEdgeLength, getVerticalScrollbarPosition, getVerticalScrollbarWidth, getViewTreeObserver, getVisibility, getWidth, getWindowId, getWindowSystemUiVisibility, getWindowToken, getWindowVisibility, getWindowVisibleDisplayFrame, getX, getY, getZ, hasExplicitFocusable, hasFocus, hasFocusable, hasNestedScrollingParent, hasOnClickListeners, hasOverlappingRendering, hasPointerCapture, hasTransientState, hasWindowFocus, inflate, invalidate, invalidate, invalidate, invalidateDrawable, invalidateOutline, isAccessibilityFocused, isAccessibilityHeading, isActivated, isAttachedToWindow, isClickable, isContextClickable, isDirty, isDrawingCacheEnabled, isDuplicateParentStateEnabled, isEnabled, isFocusable, isFocusableInTouchMode, isFocused, isFocusedByDefault, isHapticFeedbackEnabled, isHardwareAccelerated, isHorizontalFadingEdgeEnabled, isHorizontalScrollBarEnabled, isHovered, isImportantForAccessibility, isImportantForAutofill, isInEditMode, isInLayout, isInTouchMode, isKeyboardNavigationCluster, isLaidOut, isLayoutDirectionResolved, isLayoutRequested, isLongClickable, isNestedScrollingEnabled, isOpaque, isPaddingRelative, isPivotSet, isPressed, isSaveEnabled, isSaveFromParentEnabled, isScreenReaderFocusable, isScrollbarFadingEnabled, isScrollContainer, isSelected, isShown, isSoundEffectsEnabled, isTemporarilyDetached, isTextAlignmentResolved, isTextDirectionResolved, isVerticalFadingEdgeEnabled, isVerticalScrollBarEnabled, isVisibleToUserForAutofill, jumpDrawablesToCurrentState, keyboardNavigationClusterSearch, layout, measure, offsetLeftAndRight, offsetTopAndBottom, onApplyWindowInsets, onCancelPendingInputEvents, onCapturedPointerEvent, onCheckIsTextEditor, onCreateInputConnection, onDragEvent, onDrawForeground, onFilterTouchEventForSecurity, onFinishTemporaryDetach, onGenericMotionEvent, onHoverChanged, onHoverEvent, onInitializeAccessibilityEvent, onInitializeAccessibilityNodeInfo, onKeyDown, onKeyLongPress, onKeyMultiple, onKeyPreIme, onKeyShortcut, onKeyUp, onPointerCaptureChange, onPopulateAccessibilityEvent, onProvideAutofillStructure, onProvideAutofillVirtualStructure, onProvideStructure, onProvideVirtualStructure, onResolvePointerIcon, onRtlPropertiesChanged, onScreenStateChanged, onStartTemporaryDetach, onTrackballEvent, onVisibilityAggregated, onWindowFocusChanged, onWindowSystemUiVisibilityChanged, performAccessibilityAction, performClick, performContextClick, performContextClick, performHapticFeedback, performHapticFeedback, performLongClick, performLongClick, playSoundEffect, post, postDelayed, postInvalidate, postInvalidate, postInvalidateDelayed, postInvalidateDelayed, postInvalidateOnAnimation, postInvalidateOnAnimation, postOnAnimation, postOnAnimationDelayed, refreshDrawableState, releasePointerCapture, removeCallbacks, removeOnAttachStateChangeListener, removeOnLayoutChangeListener, removeOnUnhandledKeyEventListener, requestApplyInsets, requestFitSystemWindows, requestFocus, requestFocus, requestFocus, requestFocusFromTouch, requestLayout, requestPointerCapture, requestRectangleOnScreen, requestRectangleOnScreen, requestUnbufferedDispatch, requireViewById, resetPivot, resolveSize, resolveSizeAndState, restoreDefaultFocus, restoreHierarchyState, saveHierarchyState, scheduleDrawable, scrollBy, scrollTo, sendAccessibilityEvent, sendAccessibilityEventUnchecked, setAccessibilityDelegate, setAccessibilityHeading, setAccessibilityLiveRegion, setAccessibilityPaneTitle, setAccessibilityTraversalAfter, setAccessibilityTraversalBefore, setActivated, setAlpha, setAnimation, setAutofillHints, setAutofillId, setBackground, setBackgroundColor, setBackgroundDrawable, setBackgroundResource, setBackgroundTintList, setBackgroundTintMode, setBottom, setCameraDistance, setClickable, setClipBounds, setClipToOutline, setContentDescription, setContextClickable, setDefaultFocusHighlightEnabled, setDrawingCacheBackgroundColor, setDrawingCacheEnabled, setDrawingCacheQuality, setDuplicateParentStateEnabled, setElevation, setEnabled, setFadingEdgeLength, setFilterTouchesWhenObscured, setFitsSystemWindows, setFocusable, setFocusable, setFocusableInTouchMode, setFocusedByDefault, setForeground, setForegroundGravity, setForegroundTintList, setForegroundTintMode, setHapticFeedbackEnabled, setHasTransientState, setHorizontalFadingEdgeEnabled, setHorizontalScrollBarEnabled, setHovered, setId, setImportantForAccessibility, setImportantForAutofill, setKeepScreenOn, setKeyboardNavigationCluster, setLabelFor, setLayerPaint, setLayerType, setLayoutDirection, setLayoutParams, setLeft, setLongClickable, setMinimumHeight, setMinimumWidth, setNestedScrollingEnabled, setNextClusterForwardId, setNextFocusDownId, setNextFocusForwardId, setNextFocusLeftId, setNextFocusRightId, setNextFocusUpId, setOnApplyWindowInsetsListener, setOnCapturedPointerListener, setOnClickListener, setOnContextClickListener, setOnCreateContextMenuListener, setOnDragListener, setOnFocusChangeListener, setOnGenericMotionListener, setOnHoverListener, setOnKeyListener, setOnLongClickListener, setOnScrollChangeListener, setOnSystemUiVisibilityChangeListener, setOnTouchListener, setOutlineAmbientShadowColor, setOutlineProvider, setOutlineSpotShadowColor, setOverScrollMode, setPadding, setPaddingRelative, setPivotX, setPivotY, setPointerIcon, setPressed, setRevealOnFocusHint, setRight, setRotation, setRotationX, setRotationY, setSaveEnabled, setSaveFromParentEnabled, setScaleX, setScaleY, setScreenReaderFocusable, setScrollBarDefaultDelayBeforeFade, setScrollBarFadeDuration, setScrollbarFadingEnabled, setScrollBarSize, setScrollBarStyle, setScrollContainer, setScrollIndicators, setScrollIndicators, setScrollX, setScrollY, setSelected, setSoundEffectsEnabled, setStateListAnimator, setSystemUiVisibility, setTag, setTag, setTextAlignment, setTextDirection, setTooltipText, setTop, setTouchDelegate, setTransitionName, setTranslationX, setTranslationY, setTranslationZ, setVerticalFadingEdgeEnabled, setVerticalScrollBarEnabled, setVerticalScrollbarPosition, setVisibility, setWillNotCacheDrawing, setWillNotDraw, setX, setY, setZ, showContextMenu, showContextMenu, startActionMode, startActionMode, startAnimation, startDrag, startDragAndDrop, startNestedScroll, stopNestedScroll, toString, unscheduleDrawable, unscheduleDrawable, updateDragShadow, willNotCacheDrawing, willNotDraw

从类继承的方法 java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

字段详细资料

isDrawToolViewVisible

public boolean isDrawToolViewVisible

构造器详细资料

WhiteboardDrawView

public WhiteboardDrawView(android.content.Context context)

WhiteboardDrawView

public WhiteboardDrawView(android.content.Context context,
 android.util.AttributeSet attrs)

WhiteboardDrawView

public WhiteboardDrawView(android.content.Context context,
 android.util.AttributeSet attrs,
 int defStyleAttr)

WhiteboardDrawView

public WhiteboardDrawView(android.content.Context context,
 WhiteboardView whiteboardView,
 MWhiteboard.Whiteboard whiteboard,
 LinkedList<String> annotationList,
 boolean isLocalWhiteboard)

方法详细资料

setDrawToolViewVisible

public void setDrawToolViewVisible(boolean isVisible)

显示工具栏

onTouchEvent

public boolean onTouchEvent(android.view.MotionEvent event)

覆盖:

onTouchEvent 在类中 android.view.View

enableInterceptTouchEvent

public WhiteboardDrawView enableInterceptTouchEvent(boolean isIntercept)

设置拦截触摸事件

参数:

isIntercept - 是否拦截

返回:

isInterceptTouchEvent

public boolean isInterceptTouchEvent()

是否拦截触摸事件

getScale

public static float getScale()

获取白板放大倍数

onTouchEventText

public void onTouchEventText(int action)

绘制文本

onTouchEventLine

public void onTouchEventLine(int action)

画 曲线、荧光笔线、箭头

getToolType

public WhiteboardDrawView.ToolType getToolType()

获取工具类型

setTextSize

public void setTextSize(int textSize)

设置文本的字体大小

参数:

textSize -

drawText

public void drawText(String text)

绘制文本

参数:

text - 文本内容

setLaserPenSize

public void setLaserPenSize(WhiteboardDrawView.LaserPenSize size)

设置激光笔的大小尺寸

参数:

size -

hideBitmap

public void hideBitmap(boolean isHide)

隐藏背景图

isHideBitmap

public boolean isHideBitmap()

是否隐藏背景图

clearBitmap

public void clearBitmap()

清空背景图片

hasBitmap

public boolean hasBitmap()

是否绘制背景图

removeBitmap

public void removeBitmap(android.graphics.Bitmap bitmap)

清空背景图

drawBitmap

public void drawBitmap(android.graphics.Bitmap bitmap,
 int gravity)

绘制背景图片

参数:

bitmap - 图片载体

gravity - 位置

drawBitmap

public void drawBitmap(android.graphics.Bitmap bitmap,
 int left,
 int top,
 int right,
 int bottom)

绘制背景图片

参数:

bitmap - 图片载体

left - 距离白板布局左边框的像素长度（px）

top - 距离白板布局上边框的像素长度（px）

right - 距离白板布局右边框的像素长度（px）

bottom - 距离白板布局下边框的像素长度（px）

undo

public void undo()

取消上一步的绘制

redo

public void redo()

回退上一条的绘制

clearPaint

public void clearPaint()

清除绘制的内容

refreshView

public void refreshView()

刷新白板

setWhiteboardColor

public void setWhiteboardColor(int color)

设置白板画布的背景颜色

参数:

color - 颜色值