IT. Expert System.

Android Reference

RectF

android.graphics

Class RectF

java.lang.Object
- android.graphics.RectF

All Implemented Interfaces:

Parcelable
```
public class RectF
extends Object
implements Parcelable
```
RectF holds four float coordinates for a rectangle. The rectangle is represented by the coordinates of its 4 edges (left, top, right bottom). These fields can be accessed directly. Use width() and height() to retrieve the rectangle's width and height. Note: most methods do not check to see that the coordinates are sorted correctly (i.e. left <= right and top <= bottom).

Nested Class Summary
- Nested classes/interfaces inherited from interface android.os.Parcelable
  Parcelable.ClassLoaderCreator<T>, Parcelable.Creator<T>

Field Summary

Fields
Modifier and Type Field and Description

float bottom

static Parcelable.Creator<RectF> CREATOR

float left

float right

float top
- Fields inherited from interface android.os.Parcelable
  CONTENTS_FILE_DESCRIPTOR, PARCELABLE_WRITE_RETURN_VALUE

Fields
Modifier and Type	Field and Description
`float`	`bottom`
`static Parcelable.Creator<RectF>`	`CREATOR`
`float`	`left`
`float`	`right`
`float`	`top`

Constructor Summary

Constructors
Constructor and Description
`RectF()` Create a new empty RectF.
`RectF(float left, float top, float right, float bottom)` Create a new rectangle with the specified coordinates.
`RectF(Rect r)`
`RectF(RectF r)` Create a new rectangle, initialized with the values in the specified rectangle (which is left unmodified).

Method Summary

Methods
Modifier and Type	Method and Description
`float`	`centerX()`
`float`	`centerY()`
`boolean`	`contains(float x, float y)` Returns true if (x,y) is inside the rectangle.
`boolean`	`contains(float left, float top, float right, float bottom)` Returns true iff the 4 specified sides of a rectangle are inside or equal to this rectangle.
`boolean`	`contains(RectF r)` Returns true iff the specified rectangle r is inside or equal to this rectangle.
`int`	`describeContents()` Parcelable interface methods
`boolean`	`equals(Object o)` Compares this instance with the specified object and indicates if they are equal.
`int`	`hashCode()` Returns an integer hash code for this object.
`float`	`height()`
`void`	`inset(float dx, float dy)` Inset the rectangle by (dx,dy).
`boolean`	`intersect(float left, float top, float right, float bottom)` If the rectangle specified by left,top,right,bottom intersects this rectangle, return true and set this rectangle to that intersection, otherwise return false and do not change this rectangle.
`boolean`	`intersect(RectF r)` If the specified rectangle intersects this rectangle, return true and set this rectangle to that intersection, otherwise return false and do not change this rectangle.
`boolean`	`intersects(float left, float top, float right, float bottom)` Returns true if this rectangle intersects the specified rectangle.
`static boolean`	`intersects(RectF a, RectF b)` Returns true iff the two specified rectangles intersect.
`boolean`	`isEmpty()` Returns true if the rectangle is empty (left >= right or top >= bottom)
`void`	`offset(float dx, float dy)` Offset the rectangle by adding dx to its left and right coordinates, and adding dy to its top and bottom coordinates.
`void`	`offsetTo(float newLeft, float newTop)` Offset the rectangle to a specific (left, top) position, keeping its width and height the same.
`void`	`printShortString(PrintWriter pw)` Print short representation to given writer.
`void`	`readFromParcel(Parcel in)` Set the rectangle's coordinates from the data stored in the specified parcel.
`void`	`round(Rect dst)` Set the dst integer Rect by rounding this rectangle's coordinates to their nearest integer values.
`void`	`roundOut(Rect dst)` Set the dst integer Rect by rounding "out" this rectangle, choosing the floor of top and left, and the ceiling of right and bottom.
`void`	`set(float left, float top, float right, float bottom)` Set the rectangle's coordinates to the specified values.
`void`	`set(Rect src)` Copy the coordinates from src into this rectangle.
`void`	`set(RectF src)` Copy the coordinates from src into this rectangle.
`void`	`setEmpty()` Set the rectangle to (0,0,0,0)
`boolean`	`setIntersect(RectF a, RectF b)` If rectangles a and b intersect, return true and set this rectangle to that intersection, otherwise return false and do not change this rectangle.
`void`	`sort()` Swap top/bottom or left/right if there are flipped (i.e.
`String`	`toShortString()` Return a string representation of the rectangle in a compact form.
`String`	`toShortString(StringBuilder sb)` Return a string representation of the rectangle in a compact form.
`String`	`toString()` Returns a string containing a concise, human-readable description of this object.
`void`	`union(float x, float y)` Update this Rect to enclose itself and the [x,y] coordinate.
`void`	`union(float left, float top, float right, float bottom)` Update this Rect to enclose itself and the specified rectangle.
`void`	`union(RectF r)` Update this Rect to enclose itself and the specified rectangle.
`float`	`width()`
`void`	`writeToParcel(Parcel out, int flags)` Write this rectangle to the specified parcel.

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

- Field Detail
  - left
```
public float left
```
  - top
```
public float top
```
  - right
```
public float right
```
  - bottom
```
public float bottom
```
  - CREATOR
```
public static final Parcelable.Creator<RectF> CREATOR
```
- Constructor Detail
  - RectF
```
public RectF()
```
    Create a new empty RectF. All coordinates are initialized to 0.
  - RectF
```
public RectF(float left,
     float top,
     float right,
     float bottom)
```
    Create a new rectangle with the specified coordinates. Note: no range checking is performed, so the caller must ensure that left <= right and top <= bottom.
    
    Parameters:
    left - The X coordinate of the left side of the rectangle
    top - The Y coordinate of the top of the rectangle
    right - The X coordinate of the right side of the rectangle
    bottom - The Y coordinate of the bottom of the rectangle
  - RectF
```
public RectF(RectF r)
```
    Create a new rectangle, initialized with the values in the specified rectangle (which is left unmodified).
    
    Parameters:
    r - The rectangle whose coordinates are copied into the new rectangle.
  - RectF
```
public RectF(Rect r)
```
- Method Detail
  - equals
```
public boolean equals(Object o)
```
    Description copied from class: Object
    
    Compares this instance with the specified object and indicates if they are equal. In order to be equal, o must represent the same object as this instance using a class-specific comparison. The general contract is that this comparison should be reflexive, symmetric, and transitive. Also, no object reference other than null is equal to null.
    The default implementation returns true only if this == o. See Writing a correct equals method if you intend implementing your own equals method.
    The general contract for the equals and Object.hashCode() methods is that if equals returns true for any two objects, then hashCode() must return the same value for these objects. This means that subclasses of Object usually override either both methods or neither of them.
    
    Overrides:
    
    equals in class Object
    
    Parameters:
    o - the object to compare this instance with.
    
    Returns:
    true if the specified object is equal to this Object; false otherwise.
    See Also:
    Object.hashCode()
  - hashCode
```
public int hashCode()
```
    Description copied from class: Object
    
    Returns an integer hash code for this object. By contract, any two objects for which Object.equals(java.lang.Object) returns true must return the same hash code value. This means that subclasses of Object usually override both methods or neither method.
    Note that hash values must not change over time unless information used in equals comparisons also changes.
    See Writing a correct hashCode method if you intend implementing your own hashCode method.
    
    Overrides:
    
    hashCode in class Object
    
    Returns:
    this object's hash code.
    See Also:
    Object.equals(java.lang.Object)
  - toString
```
public String toString()
```
    Description copied from class: Object
    Returns a string containing a concise, human-readable description of this object. Subclasses are encouraged to override this method and provide an implementation that takes into account the object's type and data. The default implementation is equivalent to the following expression:
```
   getClass().getName() + '@' + Integer.toHexString(hashCode())
```
    See Writing a useful toString method if you intend implementing your own toString method.
    Overrides:
    
    toString in class Object
    
    Returns:
    a printable representation of this object.
  - toShortString
```
public String toShortString()
```
    Return a string representation of the rectangle in a compact form.
  - toShortString
```
public String toShortString(StringBuilder sb)
```
    Return a string representation of the rectangle in a compact form.
  - printShortString
```
public void printShortString(PrintWriter pw)
```
    Print short representation to given writer.
  - isEmpty
```
public final boolean isEmpty()
```
    Returns true if the rectangle is empty (left >= right or top >= bottom)
  - width
```
public final float width()
```
    Returns:
    the rectangle's width. This does not check for a valid rectangle (i.e. left <= right) so the result may be negative.
  - height
```
public final float height()
```
    Returns:
    the rectangle's height. This does not check for a valid rectangle (i.e. top <= bottom) so the result may be negative.
  - centerX
```
public final float centerX()
```
    Returns:
    the horizontal center of the rectangle. This does not check for a valid rectangle (i.e. left <= right)
  - centerY
```
public final float centerY()
```
    Returns:
    the vertical center of the rectangle. This does not check for a valid rectangle (i.e. top <= bottom)
  - setEmpty
```
public void setEmpty()
```
    Set the rectangle to (0,0,0,0)
  - set
```
public void set(float left,
       float top,
       float right,
       float bottom)
```
    Set the rectangle's coordinates to the specified values. Note: no range checking is performed, so it is up to the caller to ensure that left <= right and top <= bottom.
    
    Parameters:
    left - The X coordinate of the left side of the rectangle
    top - The Y coordinate of the top of the rectangle
    right - The X coordinate of the right side of the rectangle
    bottom - The Y coordinate of the bottom of the rectangle
  - set
```
public void set(RectF src)
```
    Copy the coordinates from src into this rectangle.
    
    Parameters:
    src - The rectangle whose coordinates are copied into this rectangle.
  - set
```
public void set(Rect src)
```
    Copy the coordinates from src into this rectangle.
    
    Parameters:
    src - The rectangle whose coordinates are copied into this rectangle.
  - offset
```
public void offset(float dx,
          float dy)
```
    Offset the rectangle by adding dx to its left and right coordinates, and adding dy to its top and bottom coordinates.
    
    Parameters:
    dx - The amount to add to the rectangle's left and right coordinates
    dy - The amount to add to the rectangle's top and bottom coordinates
  - offsetTo
```
public void offsetTo(float newLeft,
            float newTop)
```
    Offset the rectangle to a specific (left, top) position, keeping its width and height the same.
    
    Parameters:
    newLeft - The new "left" coordinate for the rectangle
    newTop - The new "top" coordinate for the rectangle
  - inset
```
public void inset(float dx,
         float dy)
```
    Inset the rectangle by (dx,dy). If dx is positive, then the sides are moved inwards, making the rectangle narrower. If dx is negative, then the sides are moved outwards, making the rectangle wider. The same holds true for dy and the top and bottom.
    
    Parameters:
    dx - The amount to add(subtract) from the rectangle's left(right)
    dy - The amount to add(subtract) from the rectangle's top(bottom)
  - contains
```
public boolean contains(float x,
               float y)
```
    Returns true if (x,y) is inside the rectangle. The left and top are considered to be inside, while the right and bottom are not. This means that for a x,y to be contained: left <= x < right and top <= y < bottom. an empty rectangle never contains any point.
    
    Parameters:
    x - The X coordinate of the point being tested for containment
    y - The Y coordinate of the point being tested for containment
    
    Returns:
    true iff (x,y) are contained by the rectangle, where containment means left <= x < right and top <= y < bottom
  - contains
```
public boolean contains(float left,
               float top,
               float right,
               float bottom)
```
    Returns true iff the 4 specified sides of a rectangle are inside or equal to this rectangle. i.e. is this rectangle a superset of the specified rectangle. An empty rectangle never contains another rectangle.
    
    Parameters:
    left - The left side of the rectangle being tested for containment
    top - The top of the rectangle being tested for containment
    right - The right side of the rectangle being tested for containment
    bottom - The bottom of the rectangle being tested for containment
    
    Returns:
    true iff the the 4 specified sides of a rectangle are inside or equal to this rectangle
  - contains
```
public boolean contains(RectF r)
```
    Returns true iff the specified rectangle r is inside or equal to this rectangle. An empty rectangle never contains another rectangle.
    
    Parameters:
    r - The rectangle being tested for containment.
    
    Returns:
    true iff the specified rectangle r is inside or equal to this rectangle
  - intersect
```
public boolean intersect(float left,
                float top,
                float right,
                float bottom)
```
    If the rectangle specified by left,top,right,bottom intersects this rectangle, return true and set this rectangle to that intersection, otherwise return false and do not change this rectangle. No check is performed to see if either rectangle is empty. Note: To just test for intersection, use intersects()
    
    Parameters:
    left - The left side of the rectangle being intersected with this rectangle
    top - The top of the rectangle being intersected with this rectangle
    right - The right side of the rectangle being intersected with this rectangle.
    bottom - The bottom of the rectangle being intersected with this rectangle.
    
    Returns:
    true if the specified rectangle and this rectangle intersect (and this rectangle is then set to that intersection) else return false and do not change this rectangle.
  - intersect
```
public boolean intersect(RectF r)
```
    If the specified rectangle intersects this rectangle, return true and set this rectangle to that intersection, otherwise return false and do not change this rectangle. No check is performed to see if either rectangle is empty. To just test for intersection, use intersects()
    
    Parameters:
    r - The rectangle being intersected with this rectangle.
    
    Returns:
    true if the specified rectangle and this rectangle intersect (and this rectangle is then set to that intersection) else return false and do not change this rectangle.
  - setIntersect
```
public boolean setIntersect(RectF a,
                   RectF b)
```
    If rectangles a and b intersect, return true and set this rectangle to that intersection, otherwise return false and do not change this rectangle. No check is performed to see if either rectangle is empty. To just test for intersection, use intersects()
    
    Parameters:
    a - The first rectangle being intersected with
    b - The second rectangle being intersected with
    
    Returns:
    true iff the two specified rectangles intersect. If they do, set this rectangle to that intersection. If they do not, return false and do not change this rectangle.
  - intersects
```
public boolean intersects(float left,
                 float top,
                 float right,
                 float bottom)
```
    Returns true if this rectangle intersects the specified rectangle. In no event is this rectangle modified. No check is performed to see if either rectangle is empty. To record the intersection, use intersect() or setIntersect().
    
    Parameters:
    left - The left side of the rectangle being tested for intersection
    top - The top of the rectangle being tested for intersection
    right - The right side of the rectangle being tested for intersection
    bottom - The bottom of the rectangle being tested for intersection
    
    Returns:
    true iff the specified rectangle intersects this rectangle. In no event is this rectangle modified.
  - intersects
```
public static boolean intersects(RectF a,
                 RectF b)
```
    Returns true iff the two specified rectangles intersect. In no event are either of the rectangles modified. To record the intersection, use intersect() or setIntersect().
    
    Parameters:
    a - The first rectangle being tested for intersection
    b - The second rectangle being tested for intersection
    
    Returns:
    true iff the two specified rectangles intersect. In no event are either of the rectangles modified.
  - round
```
public void round(Rect dst)
```
    Set the dst integer Rect by rounding this rectangle's coordinates to their nearest integer values.
  - roundOut
```
public void roundOut(Rect dst)
```
    Set the dst integer Rect by rounding "out" this rectangle, choosing the floor of top and left, and the ceiling of right and bottom.
  - union
```
public void union(float left,
         float top,
         float right,
         float bottom)
```
    Update this Rect to enclose itself and the specified rectangle. If the specified rectangle is empty, nothing is done. If this rectangle is empty it is set to the specified rectangle.
    
    Parameters:
    left - The left edge being unioned with this rectangle
    top - The top edge being unioned with this rectangle
    right - The right edge being unioned with this rectangle
    bottom - The bottom edge being unioned with this rectangle
  - union
```
public void union(RectF r)
```
    Update this Rect to enclose itself and the specified rectangle. If the specified rectangle is empty, nothing is done. If this rectangle is empty it is set to the specified rectangle.
    
    Parameters:
    r - The rectangle being unioned with this rectangle
  - union
```
public void union(float x,
         float y)
```
    Update this Rect to enclose itself and the [x,y] coordinate. There is no check to see that this rectangle is non-empty.
    
    Parameters:
    x - The x coordinate of the point to add to the rectangle
    y - The y coordinate of the point to add to the rectangle
  - sort
```
public void sort()
```
    Swap top/bottom or left/right if there are flipped (i.e. left > right and/or top > bottom). This can be called if the edges are computed separately, and may have crossed over each other. If the edges are already correct (i.e. left <= right and top <= bottom) then nothing is done.
  - describeContents
```
public int describeContents()
```
    Parcelable interface methods
    
    Specified by:
    
    describeContents in interface Parcelable
    
    Returns:
    a bitmask indicating the set of special object types marshalled by the Parcelable.
  - writeToParcel
```
public void writeToParcel(Parcel out,
                 int flags)
```
    Write this rectangle to the specified parcel. To restore a rectangle from a parcel, use readFromParcel()
    
    Specified by:
    
    writeToParcel in interface Parcelable
    
    Parameters:
    out - The parcel to write the rectangle's coordinates into
    flags - Additional flags about how the object should be written. May be 0 or Parcelable.PARCELABLE_WRITE_RETURN_VALUE.
  - readFromParcel
```
public void readFromParcel(Parcel in)
```
    Set the rectangle's coordinates from the data stored in the specified parcel. To write a rectangle to a parcel, call writeToParcel().
    
    Parameters:
    in - The parcel to read the rectangle's coordinates from

Content

Android Reference

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)

RFC (best current practice status)

RFC (historic status)

RFC (unknown status)

IT dictionary

License.

All information of this service is derived from the free sources and is provided solely in the form of quotations. This service provides information and interfaces solely for the familiarization (not ownership) and under the "as is" condition.

IT. Expert System.

Android Reference

RectF

Class RectF

Nested Class Summary

Nested classes/interfaces inherited from interface android.os.Parcelable

Field Summary

Fields inherited from interface android.os.Parcelable

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Field Detail

left

top

right

bottom

CREATOR

Constructor Detail

RectF

RectF

RectF

RectF

Method Detail

equals

hashCode

toString

toShortString

toShortString

printShortString

isEmpty

width

height

centerX

centerY

setEmpty

set

set

set

offset

offsetTo

inset

contains

contains

contains

intersect

intersect

setIntersect

intersects

intersects

round

roundOut

union

union

union

sort

describeContents

writeToParcel

readFromParcel

Android Reference

Java basics

Java Enterprise Edition (EE)

Java Standard Edition (SE)

SQL

HTML

PHP

CSS

Java Script

MYSQL

JQUERY

VBS

REGEX

C

C++

C#

Design patterns

RFC (standard status)

RFC (proposed standard status)

RFC (draft standard status)

RFC (informational status)

RFC (experimental status)