android.graphics

Class Canvas

java.lang.Object

android.graphics.Canvas

public class Canvas
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Canvas.EdgeType
static class	Canvas.VertexMode

Field Summary

Fields

Modifier and Type	Field and Description
static int	ALL_SAVE_FLAG
static int	CLIP_SAVE_FLAG
static int	CLIP_TO_LAYER_SAVE_FLAG
static int	FULL_COLOR_LAYER_SAVE_FLAG
static int	HAS_ALPHA_LAYER_SAVE_FLAG
static int	MATRIX_SAVE_FLAG

Constructor Summary

Constructors

Constructor and Description
Canvas()
Canvas(Bitmap bitmap)

Method Summary

Methods

Modifier and Type	Method and Description
boolean	clipPath(Path path)
boolean	clipPath(Path path, Region.Op op)
boolean	clipRect(float left, float top, float right, float bottom)
boolean	clipRect(float left, float top, float right, float bottom, Region.Op op)
boolean	clipRect(int left, int top, int right, int bottom)
boolean	clipRect(Rect rect)
boolean	clipRect(RectF rect)
boolean	clipRect(RectF rect, Region.Op op)
boolean	clipRect(Rect rect, Region.Op op)
boolean	clipRegion(Region region)
boolean	clipRegion(Region region, Region.Op op)
void	concat(Matrix matrix)
void	drawArc(RectF oval, float startAngle, float sweepAngle, boolean useCenter, Paint paint)
void	drawARGB(int a, int r, int g, int b)
void	drawBitmap(Bitmap bitmap, float left, float top, Paint paint)
void	drawBitmap(Bitmap bitmap, Matrix matrix, Paint paint)
void	drawBitmap(Bitmap bitmap, Rect src, RectF dst, Paint paint)
void	drawBitmap(Bitmap bitmap, Rect src, Rect dst, Paint paint)
void	drawBitmap(int[] colors, int offset, int stride, float x, float y, int width, int height, boolean hasAlpha, Paint paint)
void	drawBitmap(int[] colors, int offset, int stride, int x, int y, int width, int height, boolean hasAlpha, Paint paint)
void	drawBitmapMesh(Bitmap bitmap, int meshWidth, int meshHeight, float[] verts, int vertOffset, int[] colors, int colorOffset, Paint paint)
void	drawCircle(float cx, float cy, float radius, Paint paint)
void	drawColor(int color)
void	drawColor(int color, PorterDuff.Mode mode)
void	drawLine(float startX, float startY, float stopX, float stopY, Paint paint)
void	drawLines(float[] pts, int offset, int count, Paint paint)
void	drawLines(float[] pts, Paint paint)
void	drawOval(RectF oval, Paint paint)
void	drawPaint(Paint paint)
void	drawPath(Path path, Paint paint)
void	drawPicture(Picture picture)
void	drawPicture(Picture picture, Rect dst)
void	drawPicture(Picture picture, RectF dst)
void	drawPoint(float x, float y, Paint paint)
void	drawPoints(float[] pts, int offset, int count, Paint paint)
void	drawPoints(float[] pts, Paint paint)
void	drawPosText(char[] text, int index, int count, float[] pos, Paint paint) Deprecated.
void	drawPosText(String text, float[] pos, Paint paint) Deprecated.
void	drawRect(float left, float top, float right, float bottom, Paint paint)
void	drawRect(RectF rect, Paint paint)
void	drawRect(Rect r, Paint paint)
void	drawRGB(int r, int g, int b)
void	drawRoundRect(RectF rect, float rx, float ry, Paint paint)
void	drawText(char[] text, int index, int count, float x, float y, Paint paint)
void	drawText(CharSequence text, int start, int end, float x, float y, Paint paint)
void	drawText(String text, float x, float y, Paint paint)
void	drawText(String text, int start, int end, float x, float y, Paint paint)
void	drawTextOnPath(char[] text, int index, int count, Path path, float hOffset, float vOffset, Paint paint)
void	drawTextOnPath(String text, Path path, float hOffset, float vOffset, Paint paint)
void	drawVertices(Canvas.VertexMode mode, int vertexCount, float[] verts, int vertOffset, float[] texs, int texOffset, int[] colors, int colorOffset, short[] indices, int indexOffset, int indexCount, Paint paint)
Rect	getClipBounds()
boolean	getClipBounds(Rect bounds)
int	getDensity()
DrawFilter	getDrawFilter()
int	getHeight()
Matrix	getMatrix() Deprecated.
void	getMatrix(Matrix ctm) Deprecated.
int	getMaximumBitmapHeight()
int	getMaximumBitmapWidth()
int	getSaveCount()
int	getWidth()
boolean	isHardwareAccelerated()
boolean	isOpaque()
boolean	quickReject(float left, float top, float right, float bottom, Canvas.EdgeType type)
boolean	quickReject(Path path, Canvas.EdgeType type)
boolean	quickReject(RectF rect, Canvas.EdgeType type)
void	restore()
void	restoreToCount(int saveCount)
void	rotate(float degrees)
void	rotate(float degrees, float px, float py)
int	save()
int	save(int saveFlags)
int	saveLayer(float left, float top, float right, float bottom, Paint paint, int saveFlags)
int	saveLayer(RectF bounds, Paint paint, int saveFlags)
int	saveLayerAlpha(float left, float top, float right, float bottom, int alpha, int saveFlags)
int	saveLayerAlpha(RectF bounds, int alpha, int saveFlags)
void	scale(float sx, float sy)
void	scale(float sx, float sy, float px, float py)
void	setBitmap(Bitmap bitmap)
void	setDensity(int density)
void	setDrawFilter(DrawFilter filter)
void	setMatrix(Matrix matrix)
void	skew(float sx, float sy)
void	translate(float dx, float dy)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MATRIX_SAVE_FLAG

public static final int MATRIX_SAVE_FLAG

See Also:

Constant Field Values

CLIP_SAVE_FLAG

public static final int CLIP_SAVE_FLAG

See Also:

Constant Field Values

HAS_ALPHA_LAYER_SAVE_FLAG

public static final int HAS_ALPHA_LAYER_SAVE_FLAG

See Also:

Constant Field Values

FULL_COLOR_LAYER_SAVE_FLAG

public static final int FULL_COLOR_LAYER_SAVE_FLAG

See Also:

Constant Field Values

CLIP_TO_LAYER_SAVE_FLAG

public static final int CLIP_TO_LAYER_SAVE_FLAG

See Also:

Constant Field Values

ALL_SAVE_FLAG

public static final int ALL_SAVE_FLAG

See Also:

Constant Field Values

Constructor Detail

Canvas

public Canvas()

Canvas

public Canvas(Bitmap bitmap)

Method Detail

isHardwareAccelerated

public boolean isHardwareAccelerated()

setBitmap

public void setBitmap(Bitmap bitmap)

isOpaque

public boolean isOpaque()

getWidth

public int getWidth()

getHeight

public int getHeight()

getDensity

public int getDensity()

setDensity

public void setDensity(int density)

getMaximumBitmapWidth

public int getMaximumBitmapWidth()

getMaximumBitmapHeight

public int getMaximumBitmapHeight()

save

public int save()

save

public int save(int saveFlags)

saveLayer

public int saveLayer(RectF bounds,
            Paint paint,
            int saveFlags)

saveLayer

public int saveLayer(float left,
            float top,
            float right,
            float bottom,
            Paint paint,
            int saveFlags)

saveLayerAlpha

public int saveLayerAlpha(RectF bounds,
                 int alpha,
                 int saveFlags)

saveLayerAlpha

public int saveLayerAlpha(float left,
                 float top,
                 float right,
                 float bottom,
                 int alpha,
                 int saveFlags)

restore

public void restore()

getSaveCount

public int getSaveCount()

restoreToCount

public void restoreToCount(int saveCount)

translate

public void translate(float dx,
             float dy)

scale

public void scale(float sx,
         float sy)

scale

public final void scale(float sx,
         float sy,
         float px,
         float py)

rotate

public void rotate(float degrees)

rotate

public final void rotate(float degrees,
          float px,
          float py)

skew

public void skew(float sx,
        float sy)

concat

public void concat(Matrix matrix)

setMatrix

public void setMatrix(Matrix matrix)

getMatrix

@Deprecated
public void getMatrix(Matrix ctm)

Deprecated.

getMatrix

@Deprecated
public final Matrix getMatrix()

Deprecated.

clipRect

public boolean clipRect(RectF rect,
               Region.Op op)

clipRect

public boolean clipRect(Rect rect,
               Region.Op op)

clipRect

public boolean clipRect(RectF rect)

clipRect

public boolean clipRect(Rect rect)

clipRect

public boolean clipRect(float left,
               float top,
               float right,
               float bottom,
               Region.Op op)

clipRect

public boolean clipRect(float left,
               float top,
               float right,
               float bottom)

clipRect

public boolean clipRect(int left,
               int top,
               int right,
               int bottom)

clipPath

public boolean clipPath(Path path,
               Region.Op op)

clipPath

public boolean clipPath(Path path)

clipRegion

public boolean clipRegion(Region region,
                 Region.Op op)

clipRegion

public boolean clipRegion(Region region)

getDrawFilter

public DrawFilter getDrawFilter()

setDrawFilter

public void setDrawFilter(DrawFilter filter)

quickReject

public boolean quickReject(RectF rect,
                  Canvas.EdgeType type)

quickReject

public boolean quickReject(Path path,
                  Canvas.EdgeType type)

quickReject

public boolean quickReject(float left,
                  float top,
                  float right,
                  float bottom,
                  Canvas.EdgeType type)

getClipBounds

public boolean getClipBounds(Rect bounds)

getClipBounds

public final Rect getClipBounds()

drawRGB

public void drawRGB(int r,
           int g,
           int b)

drawARGB

public void drawARGB(int a,
            int r,
            int g,
            int b)

drawColor

public void drawColor(int color)

drawColor

public void drawColor(int color,
             PorterDuff.Mode mode)

drawPaint

public void drawPaint(Paint paint)

drawPoints

public void drawPoints(float[] pts,
              int offset,
              int count,
              Paint paint)

drawPoints

public void drawPoints(float[] pts,
              Paint paint)

drawPoint

public void drawPoint(float x,
             float y,
             Paint paint)

drawLine

public void drawLine(float startX,
            float startY,
            float stopX,
            float stopY,
            Paint paint)

drawLines

public void drawLines(float[] pts,
             int offset,
             int count,
             Paint paint)

drawLines

public void drawLines(float[] pts,
             Paint paint)

drawRect

public void drawRect(RectF rect,
            Paint paint)

drawRect

public void drawRect(Rect r,
            Paint paint)

drawRect

public void drawRect(float left,
            float top,
            float right,
            float bottom,
            Paint paint)

drawOval

public void drawOval(RectF oval,
            Paint paint)

drawCircle

public void drawCircle(float cx,
              float cy,
              float radius,
              Paint paint)

drawArc

public void drawArc(RectF oval,
           float startAngle,
           float sweepAngle,
           boolean useCenter,
           Paint paint)

drawRoundRect

public void drawRoundRect(RectF rect,
                 float rx,
                 float ry,
                 Paint paint)

drawPath

public void drawPath(Path path,
            Paint paint)

drawBitmap

public void drawBitmap(Bitmap bitmap,
              float left,
              float top,
              Paint paint)

drawBitmap

public void drawBitmap(Bitmap bitmap,
              Rect src,
              RectF dst,
              Paint paint)

drawBitmap

public void drawBitmap(Bitmap bitmap,
              Rect src,
              Rect dst,
              Paint paint)

drawBitmap

public void drawBitmap(int[] colors,
              int offset,
              int stride,
              float x,
              float y,
              int width,
              int height,
              boolean hasAlpha,
              Paint paint)

drawBitmap

public void drawBitmap(int[] colors,
              int offset,
              int stride,
              int x,
              int y,
              int width,
              int height,
              boolean hasAlpha,
              Paint paint)

drawBitmap

public void drawBitmap(Bitmap bitmap,
              Matrix matrix,
              Paint paint)

drawBitmapMesh

public void drawBitmapMesh(Bitmap bitmap,
                  int meshWidth,
                  int meshHeight,
                  float[] verts,
                  int vertOffset,
                  int[] colors,
                  int colorOffset,
                  Paint paint)

drawVertices

public void drawVertices(Canvas.VertexMode mode,
                int vertexCount,
                float[] verts,
                int vertOffset,
                float[] texs,
                int texOffset,
                int[] colors,
                int colorOffset,
                short[] indices,
                int indexOffset,
                int indexCount,
                Paint paint)

drawText

public void drawText(char[] text,
            int index,
            int count,
            float x,
            float y,
            Paint paint)

drawText

public void drawText(String text,
            float x,
            float y,
            Paint paint)

drawText

public void drawText(String text,
            int start,
            int end,
            float x,
            float y,
            Paint paint)

drawText

public void drawText(CharSequence text,
            int start,
            int end,
            float x,
            float y,
            Paint paint)

drawPosText

@Deprecated
public void drawPosText(char[] text,
                          int index,
                          int count,
                          float[] pos,
                          Paint paint)

Deprecated.

drawPosText

@Deprecated
public void drawPosText(String text,
                          float[] pos,
                          Paint paint)

Deprecated.

drawTextOnPath

public void drawTextOnPath(char[] text,
                  int index,
                  int count,
                  Path path,
                  float hOffset,
                  float vOffset,
                  Paint paint)

drawTextOnPath

public void drawTextOnPath(String text,
                  Path path,
                  float hOffset,
                  float vOffset,
                  Paint paint)

drawPicture

public void drawPicture(Picture picture)

drawPicture

public void drawPicture(Picture picture,
               RectF dst)

drawPicture

public void drawPicture(Picture picture,
               Rect dst)