管理 Android 上的演示文稿注释

本页内容简介

使用 Aspose.Slides for Android via Java 管理演示文稿注释：快速轻松地在 PowerPoint 演示文稿中添加、读取、编辑、回复和删除注释。

概览

本文说明如何使用 Aspose.Slides for Android via Java 管理演示文稿注释。它介绍了主要的与注释相关的类型，并演示了如何向幻灯片添加注释、访问现有注释、处理回复和现代注释，以及从演示文稿中删除注释。

示例涵盖了 PowerPoint 中常见的审阅和协作场景，例如将注释分配给作者、读取注释文本和元数据、构建回复链，以及删除选定的注释或所有注释。

在 PowerPoint 中，注释显示为幻灯片上的注释标注。选择注释会显示其文本及相关讨论。

若希望在打开演示文稿时显示或隐藏注释且不更改注释本身，请参阅在打开演示文稿时显示或隐藏注释。

为什么向演示文稿添加注释？

在审阅演示文稿时，您可以使用注释提供反馈并与同事协作。

Aspose.Slides for Android via Java 提供以下 API 用于操作注释：

• Presentation 类，提供对演示文稿的注释作者的访问。
• ICommentCollection 接口，表示与单个作者关联的注释。
• IComment 接口，提供有关注释的信息，包括作者、创建时间、位置和文本。
• CommentAuthor 类，提供有关作者的信息，包括其姓名、缩写和关联的注释。

添加幻灯片注释

以下示例演示了如何在 PowerPoint 演示文稿的幻灯片中添加注释：

import com.aspose.slides.IComment;
import com.aspose.slides.ICommentAuthor;
import com.aspose.slides.ICommentCollection;
import com.aspose.slides.ISlide;
import com.aspose.slides.Presentation;
import com.aspose.slides.SaveFormat;
import android.graphics.PointF;
import java.util.Date;

Presentation presentation = new Presentation();
try {
    ISlide firstSlide = presentation.getSlides().get_Item(0);
    ISlide secondSlide = presentation.getSlides().addEmptySlide(presentation.getLayoutSlides().get_Item(0));
    ICommentAuthor author = presentation.getCommentAuthors().addAuthor("Jawad", "MF");
    PointF position = new PointF(0.2f, 0.2f);
    Date createdTime = new Date();

    author.getComments().addComment("Hello Jawad, this is a slide comment", firstSlide, position, createdTime);
    author.getComments().addComment("Hello Jawad, this is the second slide comment", secondSlide, position, createdTime);

    IComment[] comments = firstSlide.getSlideComments(author);
    if (comments.length > 0) {
        IComment firstComment = comments[0];
        System.out.println(firstComment.getText());

        ICommentCollection authorComments = firstComment.getAuthor().getComments();
        String commentText = authorComments.get_Item(0).getText();
        System.out.println(commentText);
    }

    presentation.save("Comments_out.pptx", SaveFormat.Pptx);
} finally {
    presentation.dispose();
}

访问幻灯片注释

以下示例演示了如何访问 PowerPoint 演示文稿中已有的注释：

import com.aspose.slides.IComment;
import com.aspose.slides.ICommentAuthor;
import com.aspose.slides.Presentation;

Presentation presentation = new Presentation("Comments1.pptx");
try {
    for (ICommentAuthor author : presentation.getCommentAuthors()) {
        for (IComment comment : author.getComments()) {
            System.out.println("Slide: " + comment.getSlide().getSlideNumber());
            System.out.println("Comment: " + comment.getText());
            System.out.println("Author: " + comment.getAuthor().getName());
            System.out.println("Posted at: " + comment.getCreatedTime());
            System.out.println();
        }
    }
} finally {
    presentation.dispose();
}

回复注释

父注释是回复层级顶部的原始注释。IComment.getParentComment 和 IComment.setParentComment 方法可让您获取或设置注释的父注释。

以下示例演示了如何添加回复并检查生成的注释层级结构：

import com.aspose.slides.IComment;
import com.aspose.slides.ICommentAuthor;
import com.aspose.slides.ISlide;
import com.aspose.slides.Presentation;
import com.aspose.slides.SaveFormat;
import android.graphics.PointF;
import java.util.Date;

Presentation presentation = new Presentation();
try {
    ISlide slide = presentation.getSlides().get_Item(0);
    PointF position = new PointF(10, 10);
    Date createdTime = new Date();

    ICommentAuthor author1 = presentation.getCommentAuthors().addAuthor("Author_1", "A.A.");
    IComment comment1 = author1.getComments().addComment("comment 1", slide, position, createdTime);

    ICommentAuthor author2 = presentation.getCommentAuthors().addAuthor("Author_2", "B.B.");
    IComment reply1 = author2.getComments().addComment("reply 1 for comment 1", slide, position, createdTime);
    reply1.setParentComment(comment1);

    IComment reply2 = author2.getComments().addComment("reply 2 for comment 1", slide, position, createdTime);
    reply2.setParentComment(comment1);

    IComment subReply = author1.getComments().addComment("subreply 3 for reply 2", slide, position, createdTime);
    subReply.setParentComment(reply2);

    author2.getComments().addComment("comment 2", slide, position, createdTime);
    IComment comment3 = author2.getComments().addComment("comment 3", slide, position, createdTime);

    IComment reply3 = author1.getComments().addComment("reply 4 for comment 3", slide, position, createdTime);
    reply3.setParentComment(comment3);

    IComment[] comments = slide.getSlideComments(null);
    for (int i = 0; i < comments.length; i++) {
        IComment comment = comments[i];
        while (comment.getParentComment() != null) {
            System.out.print("\t");
            comment = comment.getParentComment();
        }

        System.out.println(comments[i].getAuthor().getName() + ": " + comments[i].getText());
    }

    presentation.save("parent_comment.pptx", SaveFormat.Pptx);

    comment1.remove();
    presentation.save("remove_comment.pptx", SaveFormat.Pptx);
} finally {
    presentation.dispose();
}

Warning

• 当使用 IComment.remove 方法删除注释时，该注释的所有回复也会被删除。
• 如果 IComment.setParentComment 创建循环引用，则会抛出 PptxEditException。

添加现代注释

现代注释可以关联到幻灯片本身、特定形状或 AutoShape 内的文本范围。ICommentCollection.addModernComment 方法除了幻灯片和注释标记坐标外，还接受一个 IShape 参数。

如果为 shape 参数传入 null，则该注释为幻灯片级别的注释。其标记由提供的坐标定位，但未关联到特定形状，因此 IModernComment.getShape 返回 null。当提供了 IShape 时，注释会锚定到该形状。坐标仍然定义注释标记在幻灯片上的位置，而形状关联可通过 IModernComment.getShape 获取。

将现代注释锚定到形状

以下示例创建了一个幻灯片级别的现代注释和一个锚定到特定 AutoShape 的现代注释。随后读取每个注释关联的形状。

import com.aspose.slides.IAutoShape;
import com.aspose.slides.ICommentAuthor;
import com.aspose.slides.IModernComment;
import com.aspose.slides.ISlide;
import com.aspose.slides.Presentation;
import com.aspose.slides.SaveFormat;
import com.aspose.slides.ShapeType;
import android.graphics.PointF;
import java.util.Date;

Presentation presentation = new Presentation();
try {
    ISlide slide = presentation.getSlides().get_Item(0);
    ICommentAuthor author = presentation.getCommentAuthors().addAuthor("Reviewer", "RV");
    IAutoShape shape = slide.getShapes().addAutoShape(ShapeType.Rectangle, 50, 50, 300, 80);
    shape.setName("Revenue title");
    shape.getTextFrame().setText("Quarterly revenue");

    Date createdTime = new Date();
    PointF slideCommentPosition = new PointF(20, 20);
    PointF shapeCommentPosition = new PointF(60, 60);
    IModernComment slideComment = author.getComments().addModernComment("Review the overall slide layout.", slide, null, slideCommentPosition, createdTime);
    IModernComment shapeComment = author.getComments().addModernComment("Check this title.", slide, shape, shapeCommentPosition, createdTime);

    System.out.println(slideComment.getShape() == null);
    System.out.println(shapeComment.getShape().getName());

    presentation.save("modern_comments.pptx", SaveFormat.Pptx);
} finally {
    presentation.dispose();
}

将注释锚定到不同的形状类型

任何实现了 IShape 的幻灯片对象都可以用作形状锚点。常见示例包括 IAutoShape、IPictureFrame、IGroupShape、IConnector 和 IGraphicalObject（如图表）实例。

以下示例创建了几种常见的形状类型，并为每种形状关联了一个现代注释。

import com.aspose.slides.ChartType;
import com.aspose.slides.IAutoShape;
import com.aspose.slides.IChart;
import com.aspose.slides.ICommentAuthor;
import com.aspose.slides.IConnector;
import com.aspose.slides.IGroupShape;
import com.aspose.slides.IPPImage;
import com.aspose.slides.IPictureFrame;
import com.aspose.slides.ISlide;
import com.aspose.slides.Presentation;
import com.aspose.slides.SaveFormat;
import com.aspose.slides.ShapeType;
import android.graphics.PointF;
import java.util.Base64;
import java.util.Date;

Presentation presentation = new Presentation();
try {
    ISlide slide = presentation.getSlides().get_Item(0);
    ICommentAuthor author = presentation.getCommentAuthors().addAuthor("Reviewer", "RV");
    Date createdTime = new Date();

    IAutoShape autoShape = slide.getShapes().addAutoShape(ShapeType.Rectangle, 20, 20, 180, 60);
    autoShape.getTextFrame().setText("AutoShape");
    PointF autoShapeCommentPosition = new PointF(30, 30);
    author.getComments().addModernComment("Comment on an AutoShape.", slide, autoShape, autoShapeCommentPosition, createdTime);

    String imageBase64 = "iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAAFklEQVR4nGP8//8/AwMDEwMDAwMDAwAkBgMB/DXemwAAAABJRU5ErkJggg==";
    byte[] imageData = Base64.getDecoder().decode(imageBase64);
    IPPImage image = presentation.getImages().addImage(imageData);
    IPictureFrame pictureFrame = slide.getShapes().addPictureFrame(ShapeType.Rectangle, 220, 20, 120, 80, image);
    PointF pictureCommentPosition = new PointF(230, 30);
    author.getComments().addModernComment("Comment on a picture.", slide, pictureFrame, pictureCommentPosition, createdTime);

    IGroupShape groupShape = slide.getShapes().addGroupShape();
    groupShape.getShapes().addAutoShape(ShapeType.Rectangle, 0, 0, 80, 40);
    groupShape.getShapes().addAutoShape(ShapeType.Ellipse, 100, 0, 80, 40);
    PointF groupCommentPosition = new PointF(40, 150);
    author.getComments().addModernComment("Comment on a group.", slide, groupShape, groupCommentPosition, createdTime);

    IConnector connector = slide.getShapes().addConnector(ShapeType.StraightConnector1, 220, 150, 140, 40);
    PointF connectorCommentPosition = new PointF(240, 150);
    author.getComments().addModernComment("Comment on a connector.", slide, connector, connectorCommentPosition, createdTime);

    IChart chart = slide.getShapes().addChart(ChartType.ClusteredColumn, 400, 20, 250, 180);
    PointF chartCommentPosition = new PointF(420, 40);
    author.getComments().addModernComment("Comment on a graphical object.", slide, chart, chartCommentPosition, createdTime);

    presentation.save("modern_comment_shape_types.pptx", SaveFormat.Pptx);
} finally {
    presentation.dispose();
}

将注释锚定到文本并设置其状态

对于关联到 IAutoShape 的现代注释，IModernComment.getTextSelectionStart 和 IModernComment.setTextSelectionStart 用于获取形状文本框中选中文本的起始位置。IModernComment.getTextSelectionLength 和 IModernComment.setTextSelectionLength 用于获取选区的长度。这些值共同将注释关联到 AutoShape 内的特定文本范围。

IModernComment.getStatus 和 IModernComment.setStatus 方法访问来自 ModernCommentStatus 常量的值：

• NotDefined — 未定义特定的现代注释状态。
• Active — 注释处于活动状态。
• Resolved — 注释已解决。
• Closed — 注释已关闭。

以下示例创建了一个锚定到形状的现代注释，将其关联到文本选区，标记为已解决，保存演示文稿，并在重新打开文件后验证这些值。

import com.aspose.slides.IAutoShape;
import com.aspose.slides.IComment;
import com.aspose.slides.ICommentAuthor;
import com.aspose.slides.IModernComment;
import com.aspose.slides.ISlide;
import com.aspose.slides.ModernCommentStatus;
import com.aspose.slides.Presentation;
import com.aspose.slides.SaveFormat;
import com.aspose.slides.ShapeType;
import android.graphics.PointF;
import java.util.Date;

String outputFile = "modern_comment_text_anchor.pptx";
String shapeText = "Review the quarterly revenue forecast.";
String selectedText = "quarterly revenue";
int expectedSelectionStart = shapeText.indexOf(selectedText);

Presentation presentation = new Presentation();
try {
    ISlide slide = presentation.getSlides().get_Item(0);
    IAutoShape shape = slide.getShapes().addAutoShape(ShapeType.Rectangle, 50, 50, 400, 100);
    shape.setName("Forecast text");
    shape.getTextFrame().setText(shapeText);

    ICommentAuthor author = presentation.getCommentAuthors().addAuthor("Reviewer", "RV");
    PointF commentPosition = new PointF(60, 60);
    IModernComment comment = author.getComments().addModernComment("Verify this forecast wording.", slide, shape, commentPosition, new Date());
    comment.setTextSelectionStart(expectedSelectionStart);
    comment.setTextSelectionLength(selectedText.length());
    comment.setStatus(ModernCommentStatus.Resolved);

    presentation.save(outputFile, SaveFormat.Pptx);
} finally {
    presentation.dispose();
}

Presentation reopenedPresentation = new Presentation(outputFile);
try {
    ISlide reopenedSlide = reopenedPresentation.getSlides().get_Item(0);
    IComment[] reopenedComments = reopenedSlide.getSlideComments(null);

    for (IComment reopenedComment : reopenedComments) {
        if (!(reopenedComment instanceof IModernComment)) {
            continue;
        }

        IModernComment modernComment = (IModernComment) reopenedComment;
        boolean shapeMatches = modernComment.getShape() != null && "Forecast text".equals(modernComment.getShape().getName());
        boolean selectionStartMatches = modernComment.getTextSelectionStart() == expectedSelectionStart;
        boolean selectionLengthMatches = modernComment.getTextSelectionLength() == selectedText.length();
        boolean statusMatches = modernComment.getStatus() == ModernCommentStatus.Resolved;

        System.out.println("Shape anchor preserved: " + shapeMatches);
        System.out.println("Text selection start preserved: " + selectionStartMatches);
        System.out.println("Text selection length preserved: " + selectionLengthMatches);
        System.out.println("Resolved status preserved: " + statusMatches);
    }
} finally {
    reopenedPresentation.dispose();
}

检查现有的现代注释

要检查现有的演示文稿，首先确认哪些注释实现了 IModernComment，然后检查 IModernComment.getShape、IModernComment.getTextSelectionStart、IModernComment.getTextSelectionLength 和 IModernComment.getStatus。null 形状表示幻灯片级别的注释。对于 IAutoShape 锚定，文本选取方法可识别形状文本框中的关联范围。

import com.aspose.slides.IAutoShape;
import com.aspose.slides.IComment;
import com.aspose.slides.IModernComment;
import com.aspose.slides.IShape;
import com.aspose.slides.ISlide;
import com.aspose.slides.Presentation;

Presentation presentation = new Presentation("comments.pptx");
try {
    for (ISlide slide : presentation.getSlides()) {
        IComment[] comments = slide.getSlideComments(null);
        for (IComment comment : comments) {
            if (!(comment instanceof IModernComment)) {
                continue;
            }

            IModernComment modernComment = (IModernComment) comment;
            System.out.println("Slide: " + slide.getSlideNumber());
            System.out.println("Text: " + modernComment.getText());
            System.out.println("Status: " + modernComment.getStatus());

            IShape shape = modernComment.getShape();
            if (shape == null) {
                System.out.println("Anchor: slide level");
            } else {
                System.out.println("Anchor shape: " + shape.getName());
                System.out.println("Anchor type: " + shape.getClass().getSimpleName());

                if (shape instanceof IAutoShape) {
                    System.out.println("Text selection start: " + modernComment.getTextSelectionStart());
                    System.out.println("Text selection length: " + modernComment.getTextSelectionLength());
                }
            }

            System.out.println();
        }
    }
} finally {
    presentation.dispose();
}

删除注释

删除所有注释和注释作者

以下示例演示了如何从演示文稿中删除所有注释和注释作者：

import com.aspose.slides.ICommentAuthor;
import com.aspose.slides.Presentation;
import com.aspose.slides.SaveFormat;

Presentation presentation = new Presentation("example.pptx");
try {
    for (ICommentAuthor author : presentation.getCommentAuthors()) {
        author.getComments().clear();
    }

    presentation.getCommentAuthors().clear();
    presentation.save("example_out.pptx", SaveFormat.Pptx);
} finally {
    presentation.dispose();
}

删除特定注释

以下示例演示了如何从幻灯片中删除特定注释：

import com.aspose.slides.IComment;
import com.aspose.slides.ICommentAuthor;
import com.aspose.slides.ISlide;
import com.aspose.slides.Presentation;
import com.aspose.slides.SaveFormat;
import android.graphics.PointF;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

Presentation presentation = new Presentation();
try {
    ISlide slide = presentation.getSlides().get_Item(0);
    ICommentAuthor author = presentation.getCommentAuthors().addAuthor("Author", "A");
    Date createdTime = new Date();

    PointF firstCommentPosition = new PointF(0.2f, 0.2f);
    PointF secondCommentPosition = new PointF(0.3f, 0.2f);
    author.getComments().addComment("comment 1", slide, firstCommentPosition, createdTime);
    author.getComments().addComment("comment 2", slide, secondCommentPosition, createdTime);

    for (ICommentAuthor commentAuthor : presentation.getCommentAuthors()) {
        List<IComment> commentsToRemove = new ArrayList<IComment>();
        IComment[] comments = slide.getSlideComments(commentAuthor);

        for (IComment comment : comments) {
            if ("comment 1".equals(comment.getText())) {
                commentsToRemove.add(comment);
            }
        }

        for (IComment comment : commentsToRemove) {
            commentAuthor.getComments().remove(comment);
        }
    }

    presentation.save("pres.pptx", SaveFormat.Pptx);
} finally {
    presentation.dispose();
}

常见问题

Aspose.Slides 是否支持现代注释的已解决状态？

是的。IModernComment.getStatus 和 IModernComment.setStatus 可访问 ModernCommentStatus 的值，包括 Resolved。该状态保存在演示文稿中，文件重新打开后仍可读取。

是否支持线程式讨论（回复链），以及有没有嵌套深度限制？

是的。每个注释都可以引用其父注释，从而实现回复链。API 并未定义具体的嵌套深度限制。

注释标记在幻灯片上的位置采用何种坐标系定义？

标记位置以幻灯片坐标系中的浮点坐标定义，可让您在幻灯片上精确放置。