SimpleCanvas

java.lang.Object
- android.view.View
- - stanford.androidlib.SimpleCanvas

All Implemented Interfaces:

Drawable.Callback, AccessibilityEventSource, KeyEvent.Callback, View.OnKeyListener, View.OnTouchListener

Direct Known Subclasses:

GCanvas
```
public abstract class SimpleCanvas
extends View
implements View.OnTouchListener, View.OnKeyListener
```
A SimpleCanvas is meant as a 2D drawing surface for graphics in games and animations. It provides convenience methods to make basic Android programming easier for students and new developers. In your view class, you should write:
```
 public class MyCanvas extends SimpleCanvas { ... }
 
```

Field Summary

Fields
Modifier and Type Field and Description

protected Canvas canvas

protected Paint paint
- Fields inherited from class android.view.View
  ACCESSIBILITY_LIVE_REGION_ASSERTIVE, ACCESSIBILITY_LIVE_REGION_NONE, ACCESSIBILITY_LIVE_REGION_POLITE, ALPHA, DRAWING_CACHE_QUALITY_AUTO, DRAWING_CACHE_QUALITY_HIGH, DRAWING_CACHE_QUALITY_LOW, EMPTY_STATE_SET, ENABLED_FOCUSED_SELECTED_STATE_SET, ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, ENABLED_FOCUSED_STATE_SET, ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET, ENABLED_SELECTED_STATE_SET, ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET, ENABLED_STATE_SET, ENABLED_WINDOW_FOCUSED_STATE_SET, FIND_VIEWS_WITH_CONTENT_DESCRIPTION, FIND_VIEWS_WITH_TEXT, FOCUS_BACKWARD, FOCUS_DOWN, FOCUS_FORWARD, FOCUS_LEFT, FOCUS_RIGHT, FOCUS_UP, FOCUSABLES_ALL, FOCUSABLES_TOUCH_MODE, FOCUSED_SELECTED_STATE_SET, FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, FOCUSED_STATE_SET, FOCUSED_WINDOW_FOCUSED_STATE_SET, GONE, HAPTIC_FEEDBACK_ENABLED, IMPORTANT_FOR_ACCESSIBILITY_AUTO, IMPORTANT_FOR_ACCESSIBILITY_NO, IMPORTANT_FOR_ACCESSIBILITY_NO_HIDE_DESCENDANTS, IMPORTANT_FOR_ACCESSIBILITY_YES, 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, OVER_SCROLL_ALWAYS, OVER_SCROLL_IF_CONTENT_SCROLLS, OVER_SCROLL_NEVER, PRESSED_ENABLED_FOCUSED_SELECTED_STATE_SET, PRESSED_ENABLED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_ENABLED_FOCUSED_STATE_SET, PRESSED_ENABLED_FOCUSED_WINDOW_FOCUSED_STATE_SET, PRESSED_ENABLED_SELECTED_STATE_SET, PRESSED_ENABLED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_ENABLED_STATE_SET, PRESSED_ENABLED_WINDOW_FOCUSED_STATE_SET, PRESSED_FOCUSED_SELECTED_STATE_SET, PRESSED_FOCUSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_FOCUSED_STATE_SET, PRESSED_FOCUSED_WINDOW_FOCUSED_STATE_SET, PRESSED_SELECTED_STATE_SET, PRESSED_SELECTED_WINDOW_FOCUSED_STATE_SET, PRESSED_STATE_SET, PRESSED_WINDOW_FOCUSED_STATE_SET, 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, SELECTED_STATE_SET, SELECTED_WINDOW_FOCUSED_STATE_SET, 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_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, VIEW_LOG_TAG, VISIBLE, WINDOW_FOCUSED_STATE_SET, X, Y, Z

Fields
Modifier and Type	Field and Description
`protected Canvas`	`canvas`
`protected Paint`	`paint`

Constructor Summary

Constructors
Constructor and Description
`SimpleCanvas(Context context, AttributeSet attrs)` Required constructor; your SimpleCanvas subclass must implement a constructor with exactly the same parameters.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method and Description
`void`	`animate(int fps)` Begins animating this canvas with the given number of frames per second.
`void`	`animationPause()` Halts animation until animationResume or animate is called.
`void`	`animationResume()` Continues animation that was previously started and paused.
`void`	`animationStop()` Halts animation.
`Typeface`	`createFont(String name)` Returns a new font typeface created using the given parameters.
`Typeface`	`createFont(String name, int style)` Returns a new font typeface created using the given parameters.
`Typeface`	`createFont(Typeface familyName)` Returns a new font typeface created using the given parameters.
`Typeface`	`createFont(Typeface familyName, int style)` Returns a new font typeface created using the given parameters.
`Paint`	`createPaint(int r, int g, int b)` Returns a new Paint created using the given parameters.
`Paint`	`createPaint(int r, int g, int b, int alpha)` Returns a new Paint created using the given parameters.
`Paint`	`createPaint(int r, int g, int b, int alpha, Paint.Style style)` Returns a new Paint created using the given parameters.
`void`	`drawBitmap(Bitmap image, int x, int y)` Draws the given bitmap image onto this canvas.
`void`	`drawImage(Bitmap image, int x, int y)` Draws the given bitmap image onto this canvas.
`void`	`drawOval(int x1, int y1, int x2, int y2)` Draws the given oval onto this canvas.
`void`	`drawOval(int x1, int y1, int x2, int y2, Paint paint)` Draws the given oval onto this canvas.
`void`	`drawRect(int x1, int y1, int x2, int y2)` Draws the given rectangle onto this canvas.
`void`	`drawRect(int x1, int y1, int x2, int y2, Paint paint)` Draws the given rectangle onto this canvas.
`void`	`drawRoundRect(int x1, int y1, int x2, int y2, int rx, int ry)` Draws the given rounded rectangle onto this canvas.
`void`	`drawRoundRect(int x1, int y1, int x2, int y2, int rx, int ry, Paint paint)` Draws the given rounded rectangle onto this canvas.
`void`	`drawString(String text, int x, int y)` Draws the given string onto this canvas.
`void`	`drawText(String text, int x, int y)` Draws the given string onto this canvas.
`void`	`drawText(String text, int x, int y, Paint paint)` Draws the given string onto this canvas.
`void`	`enableKeyboardEvents()` Call this to indicate that you want your simple canvas to receive events when the user types keys.
`Activity`	`getActivity()` Returns the activity that this canvas is inside.
`int`	`getAnimationTickCount()` Returns the number of frames of animation that have already passed.
`Bitmap`	`getBitmap(int id)` Returns the bitmap that corresponds to the given resource ID.
`Canvas`	`getCanvas()` Returns the drawing canvas found inside of this object.
`Bitmap`	`getScaledBitmap(int id, float scaleFactor)` Returns the bitmap that corresponds to the given resource ID.
`Bitmap`	`getScaledBitmap(int id, float width, float height)` Returns the bitmap that corresponds to the given resource ID.
`Bitmap`	`getScaledBitmapToHeight(int id, float height)` Returns the bitmap that corresponds to the given resource ID.
`Bitmap`	`getScaledBitmapToWidth(int id, float width)` Returns the bitmap that corresponds to the given resource ID.
`SimpleActivity`	`getSimpleActivity()` Returns the simple activity that this canvas is inside of.
`boolean`	`isAnimated()` Returns whether animation is currently running and/or paused.
`void`	`onAnimateTick()` This is a callback that will be called on your canvas every time the animation ticks each frame of animation.
`protected void`	`onDetachedFromWindow()` This View lifecycle method is overridden to stop any animation from running if this canvas is removed from the screen.
`boolean`	`onKey(View v, int keyCode, KeyEvent event)` Required method of OnKeyListener interface.
`boolean`	`onTouch(View v, MotionEvent event)` Required method of OnTouchListener interface.
`void`	`preAnimateTick()` This is called each time there is a tick of animation by the AnimationLoop.
`Bitmap`	`rotateBitmap(Bitmap bitmap, float degrees)` Returns a new bitmap based on the given bitmap but rotated by the given number of degrees clockwise about its center point.
`Bitmap`	`rotateBitmap(Bitmap bitmap, float degrees, float rx, float ry)` Returns a new bitmap based on the given bitmap but rotated by the given number of degrees clockwise about the point (rx, ry).
`Bitmap`	`scaleBitmap(Bitmap bitmap, float scaleFactor)` Returns a new bitmap which is the given bitmap resized by the given factor.
`Bitmap`	`scaleBitmap(Bitmap bitmap, float width, float height)` Returns a new bitmap which is the given bitmap resized to the given size.
`Bitmap`	`scaleBitmapToHeight(Bitmap bitmap, float height)` Returns a new bitmap which is the given bitmap resized to have the given height, and a proportionally scaled width to match.
`Bitmap`	`scaleBitmapToWidth(Bitmap bitmap, float width)` Returns a new bitmap which is the given bitmap resized to have the given width, and a proportionally scaled height to match.
`void`	`setAlpha(int alpha)` Sets this canvas to use the given alpha transparency from 0-255 for all drawing.
`void`	`setColor(int r, int g, int b)` Sets this canvas to use the given RGB color for all drawing.
`void`	`setColor(int r, int g, int b, int alpha)` Sets this canvas to use the given ARGB for all drawing.
`void`	`setFont(Typeface font)` Sets this canvas to use the given font for all drawing.
`void`	`setFont(Typeface fontFamily, int style)` Sets this canvas to use the given font for all drawing.
`void`	`setFont(Typeface fontFamily, int style, float size)` Sets this canvas to use the given font for all drawing.
`void`	`setFontFamily(String fontFamily)` Sets this canvas to use the given font for all drawing.
`void`	`setFontFileName(String fontFileName)` Sets this canvas to use the given font for all drawing.
`void`	`setFontSize(float size)` Sets this canvas to use the given font size for all drawing.
`void`	`setPaintStyle(Paint.Style style)` Sets this canvas to use the given paint style.

Methods inherited from class android.view.View
addChildrenForAccessibility, addFocusables, addFocusables, addOnAttachStateChangeListener, addOnLayoutChangeListener, addTouchables, animate, announceForAccessibility, awakenScrollBars, awakenScrollBars, awakenScrollBars, bringToFront, buildDrawingCache, buildDrawingCache, buildLayer, callOnClick, cancelLongPress, cancelPendingInputEvents, canResolveLayoutDirection, canResolveTextAlignment, canResolveTextDirection, canScrollHorizontally, canScrollVertically, checkInputConnectionProxy, clearAnimation, clearFocus, combineMeasuredStates, computeHorizontalScrollExtent, computeHorizontalScrollOffset, computeHorizontalScrollRange, computeScroll, computeSystemWindowInsets, computeVerticalScrollExtent, computeVerticalScrollOffset, computeVerticalScrollRange, createAccessibilityNodeInfo, createContextMenu, destroyDrawingCache, dispatchApplyWindowInsets, dispatchConfigurationChanged, dispatchDisplayHint, dispatchDragEvent, dispatchDraw, dispatchDrawableHotspotChanged, dispatchGenericFocusedEvent, dispatchGenericMotionEvent, dispatchGenericPointerEvent, dispatchHoverEvent, dispatchKeyEvent, dispatchKeyEventPreIme, dispatchKeyShortcutEvent, dispatchNestedFling, dispatchNestedPreFling, dispatchNestedPrePerformAccessibilityAction, dispatchNestedPreScroll, dispatchNestedScroll, dispatchPopulateAccessibilityEvent, dispatchProvideStructure, dispatchRestoreInstanceState, dispatchSaveInstanceState, dispatchSetActivated, dispatchSetPressed, dispatchSetSelected, dispatchSystemUiVisibilityChanged, dispatchTouchEvent, dispatchTrackballEvent, dispatchUnhandledMove, dispatchVisibilityChanged, dispatchWindowFocusChanged, dispatchWindowSystemUiVisiblityChanged, dispatchWindowVisibilityChanged, draw, drawableHotspotChanged, drawableStateChanged, findFocus, findViewById, findViewsWithText, findViewWithTag, fitSystemWindows, focusSearch, forceLayout, generateViewId, getAccessibilityClassName, getAccessibilityLiveRegion, getAccessibilityNodeProvider, getAccessibilityTraversalAfter, getAccessibilityTraversalBefore, getAlpha, getAnimation, getApplicationWindowToken, getBackground, getBackgroundTintList, getBackgroundTintMode, getBaseline, getBottom, getBottomFadingEdgeStrength, getBottomPaddingOffset, getCameraDistance, getClipBounds, getClipBounds, getClipToOutline, getContentDescription, getContext, getContextMenuInfo, getDefaultSize, getDisplay, getDrawableState, getDrawingCache, getDrawingCache, getDrawingCacheBackgroundColor, getDrawingCacheQuality, getDrawingRect, getDrawingTime, getElevation, getFilterTouchesWhenObscured, getFitsSystemWindows, getFocusables, getFocusedRect, getForeground, getForegroundGravity, getForegroundTintList, getForegroundTintMode, getGlobalVisibleRect, getGlobalVisibleRect, getHandler, getHeight, getHitRect, getHorizontalFadingEdgeLength, getHorizontalScrollbarHeight, getId, getImportantForAccessibility, getKeepScreenOn, getKeyDispatcherState, getLabelFor, getLayerType, getLayoutDirection, getLayoutParams, getLeft, getLeftFadingEdgeStrength, getLeftPaddingOffset, getLocalVisibleRect, getLocationInWindow, getLocationOnScreen, getMatrix, getMeasuredHeight, getMeasuredHeightAndState, getMeasuredState, getMeasuredWidth, getMeasuredWidthAndState, getMinimumHeight, getMinimumWidth, getNextFocusDownId, getNextFocusForwardId, getNextFocusLeftId, getNextFocusRightId, getNextFocusUpId, getOnFocusChangeListener, getOutlineProvider, getOverlay, getOverScrollMode, getPaddingBottom, getPaddingEnd, getPaddingLeft, getPaddingRight, getPaddingStart, getPaddingTop, getParent, getParentForAccessibility, getPivotX, getPivotY, getResources, getRight, getRightFadingEdgeStrength, getRightPaddingOffset, getRootView, getRootWindowInsets, getRotation, getRotationX, getRotationY, getScaleX, getScaleY, getScrollBarDefaultDelayBeforeFade, getScrollBarFadeDuration, getScrollBarSize, getScrollBarStyle, getScrollIndicators, getScrollX, getScrollY, getSolidColor, getStateListAnimator, getSuggestedMinimumHeight, getSuggestedMinimumWidth, getSystemUiVisibility, getTag, getTag, getTextAlignment, getTextDirection, getTop, getTopFadingEdgeStrength, getTopPaddingOffset, getTouchables, getTouchDelegate, getTransitionName, getTranslationX, getTranslationY, getTranslationZ, getVerticalFadingEdgeLength, getVerticalScrollbarPosition, getVerticalScrollbarWidth, getViewTreeObserver, getVisibility, getWidth, getWindowAttachCount, getWindowId, getWindowSystemUiVisibility, getWindowToken, getWindowVisibility, getWindowVisibleDisplayFrame, getX, getY, getZ, hasFocus, hasFocusable, hasNestedScrollingParent, hasOnClickListeners, hasOverlappingRendering, hasTransientState, hasWindowFocus, inflate, invalidate, invalidate, invalidate, invalidateDrawable, invalidateOutline, isAccessibilityFocused, isActivated, isAttachedToWindow, isClickable, isContextClickable, isDirty, isDrawingCacheEnabled, isDuplicateParentStateEnabled, isEnabled, isFocusable, isFocusableInTouchMode, isFocused, isHapticFeedbackEnabled, isHardwareAccelerated, isHorizontalFadingEdgeEnabled, isHorizontalScrollBarEnabled, isHovered, isImportantForAccessibility, isInEditMode, isInLayout, isInTouchMode, isLaidOut, isLayoutDirectionResolved, isLayoutRequested, isLongClickable, isNestedScrollingEnabled, isOpaque, isPaddingOffsetRequired, isPaddingRelative, isPressed, isSaveEnabled, isSaveFromParentEnabled, isScrollbarFadingEnabled, isScrollContainer, isSelected, isShown, isSoundEffectsEnabled, isTextAlignmentResolved, isTextDirectionResolved, isVerticalFadingEdgeEnabled, isVerticalScrollBarEnabled, jumpDrawablesToCurrentState, layout, measure, mergeDrawableStates, offsetLeftAndRight, offsetTopAndBottom, onAnimationEnd, onAnimationStart, onApplyWindowInsets, onAttachedToWindow, onCancelPendingInputEvents, onCheckIsTextEditor, onConfigurationChanged, onCreateContextMenu, onCreateDrawableState, onCreateInputConnection, onDisplayHint, onDragEvent, onDraw, onDrawForeground, onDrawScrollBars, onFilterTouchEventForSecurity, onFinishInflate, onFinishTemporaryDetach, onFocusChanged, onGenericMotionEvent, onHoverChanged, onHoverEvent, onInitializeAccessibilityEvent, onInitializeAccessibilityNodeInfo, onKeyDown, onKeyLongPress, onKeyMultiple, onKeyPreIme, onKeyShortcut, onKeyUp, onLayout, onMeasure, onOverScrolled, onPopulateAccessibilityEvent, onProvideStructure, onProvideVirtualStructure, onRestoreInstanceState, onRtlPropertiesChanged, onSaveInstanceState, onScreenStateChanged, onScrollChanged, onSetAlpha, onSizeChanged, onStartTemporaryDetach, onTouchEvent, onTrackballEvent, onVisibilityChanged, onWindowFocusChanged, onWindowSystemUiVisibilityChanged, onWindowVisibilityChanged, overScrollBy, performAccessibilityAction, performClick, performContextClick, performHapticFeedback, performHapticFeedback, performLongClick, playSoundEffect, post, postDelayed, postInvalidate, postInvalidate, postInvalidateDelayed, postInvalidateDelayed, postInvalidateOnAnimation, postInvalidateOnAnimation, postOnAnimation, postOnAnimationDelayed, refreshDrawableState, removeCallbacks, removeOnAttachStateChangeListener, removeOnLayoutChangeListener, requestApplyInsets, requestFitSystemWindows, requestFocus, requestFocus, requestFocus, requestFocusFromTouch, requestLayout, requestRectangleOnScreen, requestRectangleOnScreen, requestUnbufferedDispatch, resolveSize, resolveSizeAndState, restoreHierarchyState, saveHierarchyState, scheduleDrawable, scrollBy, scrollTo, sendAccessibilityEvent, sendAccessibilityEventUnchecked, setAccessibilityDelegate, setAccessibilityLiveRegion, setAccessibilityTraversalAfter, setAccessibilityTraversalBefore, setActivated, setAlpha, setAnimation, setBackground, setBackgroundColor, setBackgroundDrawable, setBackgroundResource, setBackgroundTintList, setBackgroundTintMode, setBottom, setCameraDistance, setClickable, setClipBounds, setClipToOutline, setContentDescription, setContextClickable, setDrawingCacheBackgroundColor, setDrawingCacheEnabled, setDrawingCacheQuality, setDuplicateParentStateEnabled, setElevation, setEnabled, setFadingEdgeLength, setFilterTouchesWhenObscured, setFitsSystemWindows, setFocusable, setFocusableInTouchMode, setForeground, setForegroundGravity, setForegroundTintList, setForegroundTintMode, setHapticFeedbackEnabled, setHasTransientState, setHorizontalFadingEdgeEnabled, setHorizontalScrollBarEnabled, setHovered, setId, setImportantForAccessibility, setKeepScreenOn, setLabelFor, setLayerPaint, setLayerType, setLayoutDirection, setLayoutParams, setLeft, setLongClickable, setMeasuredDimension, setMinimumHeight, setMinimumWidth, setNestedScrollingEnabled, setNextFocusDownId, setNextFocusForwardId, setNextFocusLeftId, setNextFocusRightId, setNextFocusUpId, setOnApplyWindowInsetsListener, setOnClickListener, setOnContextClickListener, setOnCreateContextMenuListener, setOnDragListener, setOnFocusChangeListener, setOnGenericMotionListener, setOnHoverListener, setOnKeyListener, setOnLongClickListener, setOnScrollChangeListener, setOnSystemUiVisibilityChangeListener, setOnTouchListener, setOutlineProvider, setOverScrollMode, setPadding, setPaddingRelative, setPivotX, setPivotY, setPressed, setRight, setRotation, setRotationX, setRotationY, setSaveEnabled, setSaveFromParentEnabled, setScaleX, setScaleY, setScrollBarDefaultDelayBeforeFade, setScrollBarFadeDuration, setScrollbarFadingEnabled, setScrollBarSize, setScrollBarStyle, setScrollContainer, setScrollIndicators, setScrollIndicators, setScrollX, setScrollY, setSelected, setSoundEffectsEnabled, setStateListAnimator, setSystemUiVisibility, setTag, setTag, setTextAlignment, setTextDirection, setTop, setTouchDelegate, setTransitionName, setTranslationX, setTranslationY, setTranslationZ, setVerticalFadingEdgeEnabled, setVerticalScrollBarEnabled, setVerticalScrollbarPosition, setVisibility, setWillNotCacheDrawing, setWillNotDraw, setX, setY, setZ, showContextMenu, startActionMode, startActionMode, startAnimation, startDrag, startNestedScroll, stopNestedScroll, toString, unscheduleDrawable, unscheduleDrawable, verifyDrawable, willNotCacheDrawing, willNotDraw

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

canvas
```
protected Canvas canvas
```

paint
```
protected Paint paint
```

Constructor Detail
- SimpleCanvas
```
public SimpleCanvas(Context context,
                    AttributeSet attrs)
```
  Required constructor; your SimpleCanvas subclass must implement a constructor with exactly the same parameters.

Method Detail

animate
```
public void animate(int fps)
```
Begins animating this canvas with the given number of frames per second. If fps is 0 or negative, stops animating.

animationPause
```
public void animationPause()
```
Halts animation until animationResume or animate is called. If you have never called animate yet, no effect.

animationResume
```
public void animationResume()
```
Continues animation that was previously started and paused. If you have never called animate yet, no effect.

animationStop
```
public void animationStop()
```
Halts animation. If not animating, no effect.

isAnimated
```
public boolean isAnimated()
```
Returns whether animation is currently running and/or paused.

enableKeyboardEvents
```
public void enableKeyboardEvents()
```
Call this to indicate that you want your simple canvas to receive events when the user types keys.

getSimpleActivity
```
public SimpleActivity getSimpleActivity()
```
Returns the simple activity that this canvas is inside of.