android.graphics.PorterDuff,android.graphics.Insets注释翻译

package android.graphics;public class PorterDuff {    // these value must match their native equivalents. See SkPorterDuff.h    public enum Mode {        /** [0, 0] */        //所绘制不会提交到画布上。        CLEAR       (0),        /** [Sa, Sc] */        //显示上层绘制图片        SRC         (1),        /** [Da, Dc] */        //显示下层绘制图片        DST         (2),        /** [Sa + (1 - Sa)*Da, Rc = Sc + (1 - Sa)*Dc] */        //正常绘制显示，上下层绘制叠盖。        SRC_OVER    (3),        /** [Sa + (1 - Sa)*Da, Rc = Dc + (1 - Da)*Sc] */        //上下层都显示。下层居上显示。        DST_OVER    (4),        /** [Sa * Da, Sc * Da] */        //取两层绘制交集。显示上层。        SRC_IN      (5),        /** [Sa * Da, Sa * Dc] */        //取两层绘制交集。显示下层。        DST_IN      (6),        /** [Sa * (1 - Da), Sc * (1 - Da)] */        //取上层绘制非交集部分。        SRC_OUT     (7),        /** [Da * (1 - Sa), Dc * (1 - Sa)] */        //取下层绘制非交集部分。        DST_OUT     (8),        /** [Da, Sc * Da + (1 - Sa) * Dc] */        //取下层非交集部分与上层交集部分        SRC_ATOP    (9),        /** [Sa, Sa * Dc + Sc * (1 - Da)] */        //取上层非交集部分与下层交集部分        DST_ATOP    (10),        /** [Sa + Da - 2 * Sa * Da, Sc * (1 - Da) + (1 - Sa) * Dc] */        //异或：去除两图层交集部分        XOR         (11),        /** [Sa + Da - Sa*Da,             Sc*(1 - Da) + Dc*(1 - Sa) + min(Sc, Dc)] */        //取两图层全部区域，交集部分颜色加深        DARKEN      (12),        /** [Sa + Da - Sa*Da,             Sc*(1 - Da) + Dc*(1 - Sa) + max(Sc, Dc)] */        //取两图层全部，点亮交集部分颜色        LIGHTEN     (13),        /** [Sa * Da, Sc * Dc] */        //取两图层交集部分叠加后颜色        MULTIPLY    (14),        /** [Sa + Da - Sa * Da, Sc + Dc - Sc * Dc] */        //取两图层全部区域，交集部分变为透明色        SCREEN      (15),        /** Saturate(S + D) */        ADD         (16),        OVERLAY     (17);        Mode(int nativeInt) {            this.nativeInt = nativeInt;        }        /**         * @hide         */        public final int nativeInt;    }}

效果如下：

package android.graphics;/** * An Insets instance holds four integer offsets which describe changes to the four * edges of a Rectangle. By convention, positive values move edges towards the * centre of the rectangle. * 一个持有四个整数偏移量的插入物，描述了矩形四边的变化。按照惯例，正值朝着矩形中心移动边缘。 * <p> * Insets are immutable so may be treated as values. * 插入物是不可改变的，所以可以把它当成值对待。 * @hide */public class Insets {    public static final Insets NONE = new Insets(0, 0, 0, 0);    public final int left;    public final int top;    public final int right;    public final int bottom;    private Insets(int left, int top, int right, int bottom) {        this.left = left;        this.top = top;        this.right = right;        this.bottom = bottom;    }    // Factory methods    /**     * Return an Insets instance with the appropriate values.     * 根据合理的值返回插入物     * @param left the left inset     * @param top the top inset     * @param right the right inset     * @param bottom the bottom inset     *     * @return Insets instance with the appropriate values     */    public static Insets of(int left, int top, int right, int bottom) {        if (left == 0 && top == 0 && right == 0 && bottom == 0) {            return NONE;        }        return new Insets(left, top, right, bottom);    }    /**     * Return an Insets instance with the appropriate values.     * 根据合理的值返回插入物     * @param r the rectangle from which to take the values     *     * @return an Insets instance with the appropriate values     */    public static Insets of(Rect r) {        return (r == null) ? NONE : of(r.left, r.top, r.right, r.bottom);    }    /**     * Two Insets instances are equal if they belong to the same class and their fields are     * pairwise equal.     * 如果两个插入物具有成对相同的值，判断相等。     * @param o the object to compare this instance with.     *     * @return true iff this object is equal {@code o}     */    @Override    public boolean equals(Object o) {        if (this == o) return true;        if (o == null || getClass() != o.getClass()) return false;        Insets insets = (Insets) o;        if (bottom != insets.bottom) return false;        if (left != insets.left) return false;        if (right != insets.right) return false;        if (top != insets.top) return false;        return true;    }    @Override    public int hashCode() {        int result = left;        result = 31 * result + top;        result = 31 * result + right;        result = 31 * result + bottom;        return result;    }    @Override    public String toString() {        return "Insets{" +                "left=" + left +                ", top=" + top +                ", right=" + right +                ", bottom=" + bottom +                '}';    }}