public class Path extends Object
| Modifier and Type | Class and Description |
|---|---|
static class |
Path.Direction
Specifies how closed shapes (e.g.
|
static class |
Path.FillType
Enum for the ways a path may be filled
|
| Modifier and Type | Field and Description |
|---|---|
boolean |
isSimplePath |
int |
mNativePath |
Region |
rects |
| Constructor and Description |
|---|
Path()
Create an empty path
|
Path(Path src)
Create a new path, copying the contents from the src path.
|
| Modifier and Type | Method and Description |
|---|---|
void |
addArc(RectF oval,
float startAngle,
float sweepAngle)
Add the specified arc to the path as a new contour.
|
void |
addCircle(float x,
float y,
float radius,
Path.Direction dir)
Add a closed circle contour to the path
|
void |
addOval(RectF oval,
Path.Direction dir)
Add a closed oval contour to the path
|
void |
addPath(Path src)
Add a copy of src to the path
|
void |
addPath(Path src,
float dx,
float dy)
Add a copy of src to the path, offset by (dx,dy)
|
void |
addPath(Path src,
Matrix matrix)
Add a copy of src to the path, transformed by matrix
|
void |
addRect(float left,
float top,
float right,
float bottom,
Path.Direction dir)
Add a closed rectangle contour to the path
|
void |
addRect(RectF rect,
Path.Direction dir)
Add a closed rectangle contour to the path
|
void |
addRoundRect(RectF rect,
float[] radii,
Path.Direction dir)
Add a closed round-rectangle contour to the path.
|
void |
addRoundRect(RectF rect,
float rx,
float ry,
Path.Direction dir)
Add a closed round-rectangle contour to the path
|
void |
arcTo(RectF oval,
float startAngle,
float sweepAngle)
Append the specified arc to the path as a new contour.
|
void |
arcTo(RectF oval,
float startAngle,
float sweepAngle,
boolean forceMoveTo)
Append the specified arc to the path as a new contour.
|
void |
close()
Close the current contour.
|
void |
computeBounds(RectF bounds,
boolean exact)
Compute the bounds of the control points of the path, and write the
answer into bounds.
|
void |
cubicTo(float x1,
float y1,
float x2,
float y2,
float x3,
float y3)
Add a cubic bezier from the last point, approaching control points
(x1,y1) and (x2,y2), and ending at (x3,y3).
|
protected void |
finalize()
Invoked when the garbage collector has detected that this instance is no longer reachable.
|
Path.FillType |
getFillType()
Return the path's fill type.
|
void |
incReserve(int extraPtCount)
Hint to the path to prepare for adding more points.
|
boolean |
isEmpty()
Returns true if the path is empty (contains no lines or curves)
|
boolean |
isInverseFillType()
Returns true if the filltype is one of the INVERSE variants
|
boolean |
isRect(RectF rect)
Returns true if the path specifies a rectangle.
|
void |
lineTo(float x,
float y)
Add a line from the last point to the specified point (x,y).
|
void |
moveTo(float x,
float y)
Set the beginning of the next contour to the point (x,y).
|
void |
offset(float dx,
float dy)
Offset the path by (dx,dy), returning true on success
|
void |
offset(float dx,
float dy,
Path dst)
Offset the path by (dx,dy), returning true on success
|
void |
quadTo(float x1,
float y1,
float x2,
float y2)
Add a quadratic bezier from the last point, approaching control point
(x1,y1), and ending at (x2,y2).
|
void |
rCubicTo(float x1,
float y1,
float x2,
float y2,
float x3,
float y3)
Same as cubicTo, but the coordinates are considered relative to the
current point on this contour.
|
void |
reset()
Clear any lines and curves from the path, making it empty.
|
void |
rewind()
Rewinds the path: clears any lines and curves from the path but
keeps the internal data structure for faster reuse.
|
void |
rLineTo(float dx,
float dy)
Same as lineTo, but the coordinates are considered relative to the last
point on this contour.
|
void |
rMoveTo(float dx,
float dy)
Set the beginning of the next contour relative to the last point on the
previous contour.
|
void |
rQuadTo(float dx1,
float dy1,
float dx2,
float dy2)
Same as quadTo, but the coordinates are considered relative to the last
point on this contour.
|
void |
set(Path src)
Replace the contents of this with the contents of src.
|
void |
setFillType(Path.FillType ft)
Set the path's fill type.
|
void |
setLastPoint(float dx,
float dy)
Sets the last point of the path.
|
void |
toggleInverseFillType()
Toggles the INVERSE state of the filltype
|
void |
transform(Matrix matrix)
Transform the points in this path by matrix.
|
void |
transform(Matrix matrix,
Path dst)
Transform the points in this path by matrix, and write the answer
into dst.
|
public final int mNativePath
public boolean isSimplePath
public Region rects
public Path()
public Path(Path src)
src - The path to copy from when initializing the new pathpublic void reset()
public void rewind()
public void set(Path src)
public Path.FillType getFillType()
public void setFillType(Path.FillType ft)
ft - The new fill type for this pathpublic boolean isInverseFillType()
public void toggleInverseFillType()
public boolean isEmpty()
public boolean isRect(RectF rect)
rect - If not null, returns the bounds of the path if it specifies
a rectanglepublic void computeBounds(RectF bounds, boolean exact)
bounds - Returns the computed bounds of the path's control points.exact - This parameter is no longer used.public void incReserve(int extraPtCount)
extraPtCount - The number of extra points that may be added to this
pathpublic void moveTo(float x,
float y)
x - The x-coordinate of the start of a new contoury - The y-coordinate of the start of a new contourpublic void rMoveTo(float dx,
float dy)
dx - The amount to add to the x-coordinate of the end of the
previous contour, to specify the start of a new contourdy - The amount to add to the y-coordinate of the end of the
previous contour, to specify the start of a new contourpublic void lineTo(float x,
float y)
x - The x-coordinate of the end of a liney - The y-coordinate of the end of a linepublic void rLineTo(float dx,
float dy)
dx - The amount to add to the x-coordinate of the previous point on
this contour, to specify a linedy - The amount to add to the y-coordinate of the previous point on
this contour, to specify a linepublic void quadTo(float x1,
float y1,
float x2,
float y2)
x1 - The x-coordinate of the control point on a quadratic curvey1 - The y-coordinate of the control point on a quadratic curvex2 - The x-coordinate of the end point on a quadratic curvey2 - The y-coordinate of the end point on a quadratic curvepublic void rQuadTo(float dx1,
float dy1,
float dx2,
float dy2)
dx1 - The amount to add to the x-coordinate of the last point on
this contour, for the control point of a quadratic curvedy1 - The amount to add to the y-coordinate of the last point on
this contour, for the control point of a quadratic curvedx2 - The amount to add to the x-coordinate of the last point on
this contour, for the end point of a quadratic curvedy2 - The amount to add to the y-coordinate of the last point on
this contour, for the end point of a quadratic curvepublic void cubicTo(float x1,
float y1,
float x2,
float y2,
float x3,
float y3)
x1 - The x-coordinate of the 1st control point on a cubic curvey1 - The y-coordinate of the 1st control point on a cubic curvex2 - The x-coordinate of the 2nd control point on a cubic curvey2 - The y-coordinate of the 2nd control point on a cubic curvex3 - The x-coordinate of the end point on a cubic curvey3 - The y-coordinate of the end point on a cubic curvepublic void rCubicTo(float x1,
float y1,
float x2,
float y2,
float x3,
float y3)
public void arcTo(RectF oval, float startAngle, float sweepAngle, boolean forceMoveTo)
oval - The bounds of oval defining shape and size of the arcstartAngle - Starting angle (in degrees) where the arc beginssweepAngle - Sweep angle (in degrees) measured clockwise, treated
mod 360.forceMoveTo - If true, always begin a new contour with the arcpublic void arcTo(RectF oval, float startAngle, float sweepAngle)
oval - The bounds of oval defining shape and size of the arcstartAngle - Starting angle (in degrees) where the arc beginssweepAngle - Sweep angle (in degrees) measured clockwisepublic void close()
public void addRect(RectF rect, Path.Direction dir)
rect - The rectangle to add as a closed contour to the pathdir - The direction to wind the rectangle's contourpublic void addRect(float left,
float top,
float right,
float bottom,
Path.Direction dir)
left - The left side of a rectangle to add to the pathtop - The top of a rectangle to add to the pathright - The right side of a rectangle to add to the pathbottom - The bottom of a rectangle to add to the pathdir - The direction to wind the rectangle's contourpublic void addOval(RectF oval, Path.Direction dir)
oval - The bounds of the oval to add as a closed contour to the pathdir - The direction to wind the oval's contourpublic void addCircle(float x,
float y,
float radius,
Path.Direction dir)
x - The x-coordinate of the center of a circle to add to the pathy - The y-coordinate of the center of a circle to add to the pathradius - The radius of a circle to add to the pathdir - The direction to wind the circle's contourpublic void addArc(RectF oval, float startAngle, float sweepAngle)
oval - The bounds of oval defining the shape and size of the arcstartAngle - Starting angle (in degrees) where the arc beginssweepAngle - Sweep angle (in degrees) measured clockwisepublic void addRoundRect(RectF rect, float rx, float ry, Path.Direction dir)
rect - The bounds of a round-rectangle to add to the pathrx - The x-radius of the rounded corners on the round-rectanglery - The y-radius of the rounded corners on the round-rectangledir - The direction to wind the round-rectangle's contourpublic void addRoundRect(RectF rect, float[] radii, Path.Direction dir)
rect - The bounds of a round-rectangle to add to the pathradii - Array of 8 values, 4 pairs of [X,Y] radiidir - The direction to wind the round-rectangle's contourpublic void addPath(Path src, float dx, float dy)
src - The path to add as a new contourdx - The amount to translate the path in X as it is addedpublic void addPath(Path src)
src - The path that is appended to the current pathpublic void addPath(Path src, Matrix matrix)
src - The path to add as a new contourpublic void offset(float dx,
float dy,
Path dst)
dx - The amount in the X direction to offset the entire pathdy - The amount in the Y direction to offset the entire pathdst - The translated path is written here. If this is null, then
the original path is modified.public void offset(float dx,
float dy)
dx - The amount in the X direction to offset the entire pathdy - The amount in the Y direction to offset the entire pathpublic void setLastPoint(float dx,
float dy)
dx - The new X coordinate for the last pointdy - The new Y coordinate for the last pointpublic void transform(Matrix matrix, Path dst)
matrix - The matrix to apply to the pathdst - The transformed path is written here. If dst is null,
then the the original path is modifiedpublic void transform(Matrix matrix)
matrix - The matrix to apply to the pathprotected void finalize()
throws Throwable
ObjectNote that objects that override finalize are significantly more expensive than
objects that don't. Finalizers may be run a long time after the object is no longer
reachable, depending on memory pressure, so it's a bad idea to rely on them for cleanup.
Note also that finalizers are run on a single VM-wide finalizer thread,
so doing blocking work in a finalizer is a bad idea. A finalizer is usually only necessary
for a class that has a native peer and needs to call a native method to destroy that peer.
Even then, it's better to provide an explicit close method (and implement
Closeable), and insist that callers manually dispose of instances. This
works well for something like files, but less well for something like a BigInteger
where typical calling code would have to deal with lots of temporaries. Unfortunately,
code that creates lots of temporaries is the worst kind of code from the point of view of
the single finalizer thread.
If you must use finalizers, consider at least providing your own
ReferenceQueue and having your own thread process that queue.
Unlike constructors, finalizers are not automatically chained. You are responsible for
calling super.finalize() yourself.
Uncaught exceptions thrown by finalizers are ignored and do not terminate the finalizer thread. See Effective Java Item 7, "Avoid finalizers" for more.