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SweepGradient.javaAPI DocAndroid 5.1 API4077Thu Mar 12 22:22:30 GMT 2015android.graphics

SweepGradient

public class SweepGradient extends Shader

Fields Summary
private static final int
TYPE_COLORS_AND_POSITIONS
private static final int
TYPE_COLOR_START_AND_COLOR_END
private int
mType
Type of the LinearGradient: can be either TYPE_COLORS_AND_POSITIONS or TYPE_COLOR_START_AND_COLOR_END.
private float
mCx
private float
mCy
private int[]
mColors
private float[]
mPositions
private int
mColor0
private int
mColor1
Constructors Summary
public SweepGradient(float cx, float cy, int[] colors, float[] positions)
A subclass of Shader that draws a sweep gradient around a center point.

param
cx The x-coordinate of the center
param
cy The y-coordinate of the center
param
colors The colors to be distributed between around the center. There must be at least 2 colors in the array.
param
positions May be NULL. The relative position of each corresponding color in the colors array, beginning with 0 and ending with 1.0. If the values are not monotonic, the drawing may produce unexpected results. If positions is NULL, then the colors are automatically spaced evenly.


                                                                                                                                                                                                                     
        
                             
        if (colors.length < 2) {
            throw new IllegalArgumentException("needs >= 2 number of colors");
        }
        if (positions != null && colors.length != positions.length) {
            throw new IllegalArgumentException(
                        "color and position arrays must be of equal length");
        }
        mType = TYPE_COLORS_AND_POSITIONS;
        mCx = cx;
        mCy = cy;
        mColors = colors;
        mPositions = positions;
        init(nativeCreate1(cx, cy, colors, positions));
public SweepGradient(float cx, float cy, int color0, int color1)
A subclass of Shader that draws a sweep gradient around a center point.

param
cx The x-coordinate of the center
param
cy The y-coordinate of the center
param
color0 The color to use at the start of the sweep
param
color1 The color to use at the end of the sweep

        mType = TYPE_COLOR_START_AND_COLOR_END;
        mCx = cx;
        mCy = cy;
        mColor0 = color0;
        mColor1 = color1;
        init(nativeCreate2(cx, cy, color0, color1));
Methods Summary
protected Shadercopy()

hide

        final SweepGradient copy;
        switch (mType) {
            case TYPE_COLORS_AND_POSITIONS:
                copy = new SweepGradient(mCx, mCy, mColors.clone(),
                        mPositions != null ? mPositions.clone() : null);
                break;
            case TYPE_COLOR_START_AND_COLOR_END:
                copy = new SweepGradient(mCx, mCy, mColor0, mColor1);
                break;
            default:
                throw new IllegalArgumentException("SweepGradient should be created with either " +
                        "colors and positions or start color and end color");
        }
        copyLocalMatrix(copy);
        return copy;
private static native longnativeCreate1(float x, float y, int[] colors, float[] positions)

private static native longnativeCreate2(float x, float y, int color0, int color1)