Java : BufferedImage 到 Bitmap 格式
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Java : BufferedImage to Bitmap format
提问by Anand S Kumar
I have a program in which i capture the screen using the code :
我有一个程序，我在其中使用代码捕获屏幕：
robot = new Robot();
BufferedImage img = robot.createScreenCapture(new Rectangle(Toolkit.getDefaultToolkit().getScreenSize()));
Now i want to convert this BufferedImage into Bitmap format and return it through a function for some other need, Not save it in a file. Any help please??
现在我想将此 BufferedImage 转换为 Bitmap 格式并通过函数返回它以满足其他一些需要，而不是将其保存在文件中。请问有什么帮助吗？？
采纳答案by aioobe
You need to have a look at ImageIO.write.
你需要看看ImageIO.write。
If you want the result in the form of a byte[]array, you should use a ByteArrayOutputStream:
如果你想要byte[]数组形式的结果，你应该使用ByteArrayOutputStream：
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ImageIO.write(yourImage, "bmp", baos);
baos.flush();
byte[] bytes = baos.toByteArray();
baos.close();
回答by Ninto
When you say "into Bitmap format" you then mean the data (as in a byte array)? If that's the case, then you can use ImageIO.write(like suggested above).
If you don't want to save it to a file, but just want to get the data, can you use a ByteArrayOutputStreamlike this:
当您说“进入位图格式”时，您的意思是数据（如字节数组）？如果是这种情况，那么您可以使用ImageIO.write（如上面建议的那样）。
如果您不想将其保存到文件，而只想获取数据，您可以使用ByteArrayOutputStream这样的：
ByteArrayOutputStream out = new ByteArrayOutputStream();
ImageIO.write(img, "BMP", out);
byte[] result = out.toByteArray();
回答by Andrew Thompson
To see the image types available for write in the J2SE (ex. JAI), see ImageIO.getWriterFileSuffixes():
要查看可在 J2SE 中写入的图像类型（例如 JAI），请参阅ImageIO.getWriterFileSuffixes()：
E.G.
例如
class ShowJavaImageTypes {
public static void main(String[] args) {
String[] imageTypes =
javax.imageio.ImageIO.getWriterFileSuffixes();
for (String imageType : imageTypes) {
System.out.println(imageType);
}
}
}
Output
输出
For this Sun Java 6 JRE on Windows 7.
对于 Windows 7 上的此 Sun Java 6 JRE。
bmp
jpg
wbmp
jpeg
png
gif
Press any key to continue . . .
See similar ImageIOmethods for MIME types, formats, and the corresponding readers.
请参阅ImageIOMIME 类型、格式和相应阅读器的类似方法。
回答by Raul Lucaciu
You can simply do this:
你可以简单地这样做：
public Bitmap getBitmapFromBufferedImage(BufferedImage image)
{
return redResult.getBitmap();
}
