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Android Reference

Shape


android.graphics.drawable.shapes

Class Shape

  • All Implemented Interfaces:
    Cloneable
    Direct Known Subclasses:
    PathShape, RectShape


    public abstract class Shape
    extends Object
    implements Cloneable
    Defines a generic graphical "shape." Any Shape can be drawn to a Canvas with its own draw() method, but more graphical control is available if you instead pass it to a ShapeDrawable.
    • Constructor Detail

      • Shape

        public Shape()
    • Method Detail

      • getWidth

        public final float getWidth()
        Returns the width of the Shape.
      • getHeight

        public final float getHeight()
        Returns the height of the Shape.
      • draw

        public abstract void draw(Canvas canvas,
                Paint paint)
        Draw this shape into the provided Canvas, with the provided Paint. Before calling this, you must call resize(float,float).
        Parameters:
        canvas - the Canvas within which this shape should be drawn
        paint - the Paint object that defines this shape's characteristics
      • resize

        public final void resize(float width,
                  float height)
        Resizes the dimensions of this shape. Must be called before draw(Canvas,Paint).
        Parameters:
        width - the width of the shape (in pixels)
        height - the height of the shape (in pixels)
      • hasAlpha

        public boolean hasAlpha()
        Checks whether the Shape is opaque. Default impl returns true. Override if your subclass can be opaque.
        Returns:
        true if any part of the drawable is not opaque.
      • onResize

        protected void onResize(float width,
                    float height)
        Callback method called when resize(float,float) is executed.
        Parameters:
        width - the new width of the Shape
        height - the new height of the Shape
      • clone

        public Shape clone()
                    throws CloneNotSupportedException
        Description copied from class: Object
        Creates and returns a copy of this Object. The default implementation returns a so-called "shallow" copy: It creates a new instance of the same class and then copies the field values (including object references) from this instance to the new instance. A "deep" copy, in contrast, would also recursively clone nested objects. A subclass that needs to implement this kind of cloning should call super.clone() to create the new instance and then create deep copies of the nested, mutable objects.
        Overrides:
        clone in class Object
        Returns:
        a copy of this object.
        Throws:
        CloneNotSupportedException - if this object's class does not implement the Cloneable interface.


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