Java android.graphics Canvas fields, constructors, methods, implement or subclass

Introduction

In this page you can find the methods, fields and constructors for android.graphics Canvas.

The text is from its open source code.

Field

int	MATRIX_SAVE_FLAG Restore the current matrix when restore() is called.
int	CLIP_SAVE_FLAG Restore the current clip when restore() is called.
int	HAS_ALPHA_LAYER_SAVE_FLAG The layer requires a per-pixel alpha channel.
int	FULL_COLOR_LAYER_SAVE_FLAG The layer requires full 8-bit precision for each color channel.
int	CLIP_TO_LAYER_SAVE_FLAG Clip drawing to the bounds of the offscreen layer, omit at your own peril.
int	ALL_SAVE_FLAG Restore everything when restore() is called (standard save flags).

Constructor

	Canvas(@NonNull Bitmap bitmap) Construct a canvas with the specified bitmap to draw into.
	Canvas(long nativeCanvas)
	Canvas() Construct an empty raster canvas.

Method

boolean	clipPath(@NonNull Path path) Intersect the current clip with the specified path.
boolean	clipPath(@NonNull Path path, @NonNull Region.Op op) Modify the current clip with the specified path.
boolean	clipRect(float left, float top, float right, float bottom) Intersect the current clip with the specified rectangle, which is expressed in local coordinates.
boolean	clipRect(int left, int top, int right, int bottom) Intersect the current clip with the specified rectangle, which is expressed in local coordinates.
boolean	clipRect(@NonNull RectF rect) Intersect the current clip with the specified rectangle, which is expressed in local coordinates.
boolean	clipRect(@NonNull Rect rect) Intersect the current clip with the specified rectangle, which is expressed in local coordinates.
boolean	clipRect(@NonNull RectF rect, @NonNull Region.Op op) Modify the current clip with the specified rectangle.
boolean	clipRect(@NonNull Rect rect, @NonNull Region.Op op) Modify the current clip with the specified rectangle, which is expressed in local coordinates.
boolean	clipRect(float left, float top, float right, float bottom, @NonNull Region.Op op) Modify the current clip with the specified rectangle, which is expressed in local coordinates.
boolean	clipRegion(@NonNull Region region) Intersect the current clip with the specified region.
void	concat(@Nullable Matrix matrix) Preconcat the current matrix with the specified matrix.
void	drawArc(@NonNull RectF oval, float startAngle, float sweepAngle, boolean useCenter, @NonNull Paint paint) Draw the specified arc, which will be scaled to fit inside the specified oval.
void	drawARGB(int a, int r, int g, int b) Fill the entire canvas' bitmap (restricted to the current clip) with the specified ARGB color, using srcover porterduff mode.
void	drawBitmap(@NonNull Bitmap bitmap, float left, float top, @Nullable Paint paint) Draw the specified bitmap, with its top/left corner at (x,y), using the specified paint, transformed by the current matrix.
void	drawBitmap(@NonNull Bitmap bitmap, @Nullable Rect src, @NonNull RectF dst, @Nullable Paint paint) Draw the specified bitmap, scaling/translating automatically to fill the destination rectangle.
void	drawBitmap(@NonNull Bitmap bitmap, @Nullable Rect src, @NonNull Rect dst, @Nullable Paint paint) Draw the specified bitmap, scaling/translating automatically to fill the destination rectangle.
void	drawBitmap(@NonNull Bitmap bitmap, @NonNull Matrix matrix, @Nullable Paint paint) Draw the bitmap using the specified matrix.
void	drawBitmapMesh(@NonNull Bitmap bitmap, int meshWidth, int meshHeight, @NonNull float[] verts, int vertOffset, @Nullable int[] colors, int colorOffset, @Nullable Paint paint) Draw the bitmap through the mesh, where mesh vertices are evenly distributed across the bitmap.
void	drawCircle(float cx, float cy, float radius, @NonNull Paint paint) Draw the specified circle using the specified paint.
void	drawColor(@ColorInt int color, @NonNull PorterDuff.Mode mode) Fill the entire canvas' bitmap (restricted to the current clip) with the specified color and porter-duff xfermode.
void	drawColor(@ColorInt int color) Fill the entire canvas' bitmap (restricted to the current clip) with the specified color, using srcover porterduff mode.
void	drawLine(float startX, float startY, float stopX, float stopY, @NonNull Paint paint) Draw a line segment with the specified start and stop x,y coordinates, using the specified paint.
void	drawLines(@Size(multiple = 4) @NonNull float[] pts, @NonNull Paint paint)
void	drawLines(@Size(multiple = 4) @NonNull float[] pts, int offset, int count, @NonNull Paint paint) Draw a series of lines.
void	drawOval(@NonNull RectF oval, @NonNull Paint paint) Draw the specified oval using the specified paint.
void	drawOval(float left, float top, float right, float bottom, @NonNull Paint paint) Draw the specified oval using the specified paint.
void	drawPaint(@NonNull Paint paint) Fill the entire canvas' bitmap (restricted to the current clip) with the specified paint.
void	drawPath(@NonNull Path path, @NonNull Paint paint) Draw the specified path using the specified paint.
void	drawPicture(@NonNull Picture picture) Save the canvas state, draw the picture, and restore the canvas state.
void	drawPoint(float x, float y, @NonNull Paint paint) Helper for drawPoints() for drawing a single point.
void	drawRect(float left, float top, float right, float bottom, @NonNull Paint paint) Draw the specified Rect using the specified paint.
void	drawRect(@NonNull RectF rect, @NonNull Paint paint) Draw the specified Rect using the specified paint.
void	drawRect(@NonNull Rect r, @NonNull Paint paint) Draw the specified Rect using the specified Paint.
void	drawRGB(int r, int g, int b) Fill the entire canvas' bitmap (restricted to the current clip) with the specified RGB color, using srcover porterduff mode.
void	drawRoundRect(@NonNull RectF rect, float rx, float ry, @NonNull Paint paint) Draw the specified round-rect using the specified paint.
void	drawText(@NonNull String text, float x, float y, @NonNull Paint paint) Draw the text, with origin at (x,y), using the specified paint.
void	drawText(@NonNull char[] text, int index, int count, float x, float y, @NonNull Paint paint) Draw the text, with origin at (x,y), using the specified paint.
void	drawText(@NonNull String text, int start, int end, float x, float y, @NonNull Paint paint) Draw the text, with origin at (x,y), using the specified paint.
void	drawText(@NonNull CharSequence text, int start, int end, float x, float y, @NonNull Paint paint) Draw the specified range of text, specified by start/end, with its origin at (x,y), in the specified Paint.
void	drawTextOnPath(@NonNull String text, @NonNull Path path, float hOffset, float vOffset, @NonNull Paint paint) Draw the text, with origin at (x,y), using the specified paint, along the specified path.
boolean	getClipBounds(@Nullable Rect bounds) Return the bounds of the current clip (in local coordinates) in the bounds parameter, and return true if it is non-empty.
Rect	getClipBounds() Retrieve the bounds of the current clip (in local coordinates).
int	getHeight() Returns the height of the current drawing layer
void	getMatrix(@NonNull Matrix ctm) Return, in ctm, the current transformation matrix.
int	getMaximumBitmapHeight() Returns the maximum allowed height for bitmaps drawn with this canvas.
int	getMaximumBitmapWidth() Returns the maximum allowed width for bitmaps drawn with this canvas.
int	getSaveCount() Returns the number of matrix/clip states on the Canvas' private stack.
int	getWidth() Returns the width of the current drawing layer
boolean	isHardwareAccelerated() Indicates whether this Canvas uses hardware acceleration.
void	restore() This call balances a previous call to save(), and is used to remove all modifications to the matrix/clip state since the last save call.
void	restoreToCount(int saveCount) Efficient way to pop any calls to save() that happened after the save count reached saveCount.
void	rotate(float degrees, float px, float py) Preconcat the current matrix with the specified rotation.
void	rotate(float degrees) Preconcat the current matrix with the specified rotation.
int	save() Saves the current matrix and clip onto a private stack.
int	save(@Saveflags int saveFlags) Based on saveFlags, can save the current matrix and clip onto a private stack.
int	saveLayer(@Nullable RectF bounds, @Nullable Paint paint, @Saveflags int saveFlags) This behaves the same as save(), but in addition it allocates and redirects drawing to an offscreen bitmap.
int	saveLayer(float left, float top, float right, float bottom, @Nullable Paint paint, @Saveflags int saveFlags) Helper version of saveLayer() that takes 4 values rather than a RectF.
int	saveLayerAlpha(float left, float top, float right, float bottom, int alpha, @Saveflags int saveFlags) Helper for saveLayerAlpha() that takes 4 values instead of a RectF.
int	saveLayerAlpha(@Nullable RectF bounds, int alpha, @Saveflags int saveFlags) This behaves the same as save(), but in addition it allocates and redirects drawing to an offscreen bitmap.
void	scale(float sx, float sy) Preconcat the current matrix with the specified scale.
void	scale(float sx, float sy, float px, float py) Preconcat the current matrix with the specified scale.
void	setBitmap(@Nullable Bitmap bitmap) Specify a bitmap for the canvas to draw into.
void	setDensity(int density) Specifies the density for this Canvas' backing bitmap.
void	setDrawFilter(@Nullable DrawFilter filter)
void	setMatrix(@Nullable Matrix matrix) Completely replace the current matrix with the specified matrix.
void	translate(float dx, float dy) Preconcat the current matrix with the specified translation