现代 API
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介绍
历史上,Aspose Slides 依赖于 java.awt,并在公共 API 中包含以下类:
从版本 24.4 开始,此公共 API 被声明为已弃用。
为了摆脱对这些类的依赖,我们添加了所谓的 “现代 API” - 即应使用替代已弃用 API 的 API,签名中包含对 Bitmap 的依赖。Canvas 被声明为已弃用,其支持从公共 Slides API 中移除。
删除对 System.Drawing 的已弃用公共 API 的支持将会在 24.8 版中进行。
现代 API
已将以下类和枚举添加到公共 API:
- IImage - 表示栅格或矢量图像。
- ImageFormat - 表示图像的文件格式。
- Images - 用于实例化和操作 IImage 接口的方法。
请注意,IImage 是可释放的(它实现了 IDisposable 接口,使用时应包裹在 using 中或以其他方便的方式释放)。
使用新 API 的典型场景如下:
Presentation pres = new Presentation();
try {
IPPImage ppImage;
// 从磁盘文件实例化 IImage 的可释放实例。
IImage image = Images.fromFile("image.png");
try {
// 通过将 IImage 实例添加到演示文稿的图像中,创建 PowerPoint 图像。
ppImage = pres.getImages().addImage(image);
} finally {
if (image != null) image.dispose();
}
// 在幻灯片 #1 上添加一个图片形状
pres.getSlides().get_Item(0).getShapes().addPictureFrame(ShapeType.Rectangle, 10, 10, 100, 100, ppImage);
// 获取表示幻灯片 #1 的 IImage 实例。
IImage slideImage = pres.getSlides().get_Item(0).getImage(new Size(1920, 1080));
try {
// 将图像保存到磁盘。
slideImage.save("slide1.jpeg", ImageFormat.Jpeg);
} finally {
if (slideImage != null) slideImage.dispose();
}
} finally {
if (pres != null) pres.dispose();
}
用现代 API 替换旧代码
一般来说,您需要将调用旧方法的 ImageIO 替换为新方法。
旧版:
Presentation pres = new Presentation();
try {
Bitmap slideImage = pres.getSlides().get_Item(0).getThumbnail(new Size(1920, 1080));
FileOutputStream fos = null;
try {
fos = new FileOutputStream("image.png");
slideImage.compress(android.graphics.Bitmap.CompressFormat.PNG, 100, fos);
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
} finally {
if (pres != null) pres.dispose();
}
新版:
Presentation pres = new Presentation();
try {
IImage slideImage = pres.getSlides().get_Item(0).getImage(new Size(1920, 1080));
try {
slideImage.save("image.png", ImageFormat.Png);
} finally {
if (slideImage != null) slideImage.dispose();
}
} finally {
if (pres != null) pres.dispose();
}
获取幻灯片缩略图
使用已弃用 API 的代码:
Presentation pres = new Presentation("pres.pptx");
try {
Bitmap slideImage = pres.getSlides().get_Item(0).getThumbnail();
FileOutputStream fos = null;
try {
fos = new FileOutputStream("slide1.png");
slideImage.compress(android.graphics.Bitmap.CompressFormat.PNG, 100, fos);
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
} finally {
if (pres != null) pres.dispose();
}
现代 API:
Presentation pres = new Presentation("pres.pptx");
try {
IImage slideImage = pres.getSlides().get_Item(0).getImage();
try {
slideImage.save("slide1.png", ImageFormat.Png);
} finally {
if (slideImage != null) slideImage.dispose();
}
} finally {
if (pres != null) pres.dispose();
}
获取形状缩略图
使用已弃用 API 的代码:
Presentation pres = new Presentation("pres.pptx");
try {
Bitmap shapeImage = pres.getSlides().get_Item(0).getShapes().get_Item(0).getThumbnail();
FileOutputStream fos = null;
try {
fos = new FileOutputStream("shape.png");
shapeImage.compress(android.graphics.Bitmap.CompressFormat.PNG, 100, fos);
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
} finally {
if (pres != null) pres.dispose();
}
现代 API:
Presentation pres = new Presentation("pres.pptx");
try {
IImage shapeImage = pres.getSlides().get_Item(0).getShapes().get_Item(0).getImage();
try {
shapeImage.save("shape.png");
} finally {
if (shapeImage != null) shapeImage.dispose();
}
} finally {
if (pres != null) pres.dispose();
}
获取演示文稿缩略图
使用已弃用 API 的代码:
Presentation pres = new Presentation("pres.pptx");
try {
Bitmap[] bitmaps = pres.getThumbnails(new RenderingOptions(), new Size(1980, 1028));
for (int index = 0; index < bitmaps.length; index++)
{
android.graphics.Bitmap thumbnail = bitmaps[index];
FileOutputStream fos = null;
try {
fos = new FileOutputStream("slide" + index + ".png");
thumbnail.compress(android.graphics.Bitmap.CompressFormat.PNG, 100, fos);
} catch (FileNotFoundException e) {
e.printStackTrace();
} finally {
if (fos != null) {
try {
fos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
} finally {
if (pres != null) pres.dispose();
}
现代 API:
Presentation pres = new Presentation("pres.pptx");
try {
IImage[] images = pres.getImages(new RenderingOptions(), new Size(1980, 1028));
try
{
for (int index = 0; index < images.length; index++)
{
IImage thumbnail = images[index];
thumbnail.save("slide" + index + ".png", ImageFormat.Png);
}
}
finally
{
for (IImage image : images)
{
image.dispose();
}
}
} finally {
if (pres != null) pres.dispose();
}
向演示文稿添加图片
使用已弃用 API 的代码:
Presentation pres = new Presentation();
try {
IPPImage ppImage = null;
File file = new File("image.png");
Bitmap bitmap = BitmapFactory.decodeFile(file.getAbsolutePath());
ppImage = pres.getImages().addImage(bitmap);
pres.getSlides().get_Item(0).getShapes().addPictureFrame(ShapeType.Rectangle, 10, 10, 100, 100, ppImage);
} finally {
if (pres != null) pres.dispose();
}
现代 API:
Presentation pres = new Presentation();
try {
IPPImage ppImage;
IImage image = Images.fromFile("image.png");
try {
ppImage = pres.getImages().addImage(image);
} finally {
if (image != null) image.dispose();
}
pres.getSlides().get_Item(0).getShapes().addPictureFrame(ShapeType.Rectangle, 10, 10, 100, 100, ppImage);
} finally {
if (pres != null) pres.dispose();
}
即将移除的方法及其在现代 API 中的替代
演示文稿
方法签名 | 替代方法签名 |
---|---|
public final Bitmap[] getThumbnails(IRenderingOptions options) | public final IImage[] getImages(IRenderingOptions options) |
public final Bitmap[] getThumbnails(IRenderingOptions options, Size imageSize) | public final IImage[] getImages(IRenderingOptions options, Size imageSize) |
public final Bitmap[] getThumbnails(IRenderingOptions options, float scaleX, float scaleY) | public final IImage[] getImages(IRenderingOptions options, float scaleX, float scaleY) |
public final Bitmap[] getThumbnails(IRenderingOptions options, int[] slides) | public final IImage[] getImages(IRenderingOptions options, int[] slides) |
public final Bitmap[] getThumbnails(IRenderingOptions options, int[] slides, Size imageSize) | public final IImage[] getImages(IRenderingOptions options, int[] slides, Size imageSize) |
public final Bitmap[] getThumbnails(IRenderingOptions options, int[] slides, float scaleX, float scaleY) | public final IImage[] getImages(IRenderingOptions options, int[] slides, float scaleX, float scaleY) |
形状
方法签名 | 替代方法签名 |
---|---|
public final Bitmap getThumbnail() | public final IImage getImage() |
public final Bitmap getThumbnail(int bounds, float scaleX, float scaleY) | public final IImage getImage(int bounds, float scaleX, float scaleY) |
幻灯片
方法签名 | 替代方法签名 |
---|---|
public final Bitmap getThumbnail() | public final IImage getImage() |
public final Bitmap getThumbnail(Size imageSize) | public final IImage getImage(Size imageSize) |
public final Bitmap getThumbnail(float scaleX, float scaleY) | public final IImage getImage(float scaleX, float scaleY) |
public final Bitmap getThumbnail(IRenderingOptions options) | public final IImage getImage(IRenderingOptions options) |
public final Bitmap getThumbnail(IRenderingOptions options, Size imageSize) | public final IImage getImage(IRenderingOptions options, Size imageSize) |
public final Bitmap getThumbnail(IRenderingOptions options, float scaleX, float scaleY) | public final IImage getImage(IRenderingOptions options, float scaleX, float scaleY) |
public final Bitmap getThumbnail(ITiffOptions options) | public final IImage getImage(ITiffOptions options) |
public final void renderToGraphics(IRenderingOptions options, Canvas graphics) | 将被完全删除 |
public final void renderToGraphics(IRenderingOptions options, Canvas graphics, Size renderingSize) | 将被完全删除 |
public final void renderToGraphics(IRenderingOptions options, Canvas graphics, float scaleX, float scaleY) | 将被完全删除 |
输出
方法签名 | 替代方法签名 |
---|---|
public final IOutputFile add(String path, Bitmap image) | public final IOutputFile add(String path, IImage image) |
ImageCollection
方法签名 | 替代方法签名 |
---|---|
public final IPPImage addImage(Bitmap image) | public final IPPImage addImage(IImage image) |
PPImage
方法签名 | 替代方法签名 |
---|---|
public final Bitmap getSystemImage() | public final IImage getImage() |
PatternFormat
方法签名 | 替代方法签名 |
---|---|
public final Bitmap getTileImage(Integer styleColor) | public final IImage getTile(Integer styleColor) |
public final Bitmap getTileImage(Integer background, Integer foreground) | public final IImage getTile(Integer background, Integer foreground) |
PatternFormatEffectiveData
方法签名 | 替代方法签名 |
---|---|
public final Bitmap getTileImage(Integer background, Integer foreground) | public final IImage getTileIImage(Integer background, Integer foreground) |
将停止对 Canvas 的 API 支持
带有 Canvas 的方法被声明为已弃用,其支持将从公共 API 中移除。
使用它的 API 部分将被移除: