Question

我想从图库中调整图片大小然后上传它。由于用户可能选择可能需要很长时间才能上传的大尺寸图像。假设我想将图像的大小调整为1024px宽度，并根据宽度重新缩放高度。我使用openGallery方法，我找不到任何参数来指定要调整大小的img的宽度。我想如果我没弄错的话，（对于相机img）Capture.capturePhoto（Display.getInstance（）。getDisplayWidth（）/ 2，-1）可以解决问题。如何从画廊中获取图像？三江源

Display.getInstance().openGallery(new ActionListener() {
  public void actionPerformed(ActionEvent evt) {
    try {
        if (evt == null) {
            System.out.println("user cancelled");
            return;
        }
        eventImgpath = (String) evt.getSource();
        Image i = Image.createImage(eventImgpath);
        eventImage.setIcon(i.scaledWidth(Display.getInstance().getDisplayWidth()));
        eventImage.getParent().revalidate();
    } catch (Exception ex) {
        ex.printStackTrace();
    }
  }
}, Display.GALLERY_IMAGE);

//sending the img path to connectionRequest
String eventImgPathFinal = eventImgpath;
AddBusinessForumConnection abfc = new AddBusinessForumConnection();
abfc.addBusinessForumConnectionMethod(eventImgPathFinal);

上传img

public void addBusinessForumConnectionMethod(String eventImg) {
    ConnectionRequest connectionRequest = new ConnectionRequest() {

        @Override
        protected void readResponse(InputStream input) throws IOException {
        }
        @Override
        protected void postResponse() {
        }
    };
    AllUrl allUrl = new AllUrl();
    connectionRequest.setUrl(allUrl.addBusinessForumUrl);
    connectionRequest.setPost(true);
    connectionRequest.addArgument("imgUrl", new ImageBase64().getBase64(eventImg));
    NetworkManager.getInstance().addToQueueAndWait(connectionRequest);
}

Answer 1

使用ImageIO调整大小：

    ByteArrayOutputStream out = = new ByteArrayOutputStream();

    ImageIO.getImageIO().save(path, out, ImageIO.FORMAT_JPEG,
            maxWidth, -1, 1);

    byte [] data = out.toByteArray();

在从openGallery方法

1 个答案: