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横向模式下URLImage的占位符缩放问题

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我将占位符缩放到屏幕大小，如下所示 . 但是如果它首先在纵向模式下观看，它只占用屏幕并且不能以横向模式覆盖整个屏幕 . 如果在横向模式下第一次观看，则它在纵向模式下看起来比屏幕尺寸大 .

我该如何解决这个问题 . 我检查了PropertyCross演示，同样存在问题 .

private EncodedImage largePlaceholder;

protected void initVars(Resources res) {
    Image tmp = Image.createImage(Display.getInstance().getDisplayWidth(), Display.getInstance().getDisplayWidth() / 6 * 3, 0);
    largePlaceholder = EncodedImage.createFromImage(tmp, false);
}

findMainImg(f).setIcon(URLImage.createToStorage(largePlaceholder, getMainImg + "_0_ y", getMainImg, URLImage.RESIZE_SCALE_TO_FILL));

更新：

int sizethumb = 0;
int sizethumb1 = 0;
if (responsesImg.size() > 0) {

    sizethumb = largePlaceholder.getWidth();
    sizethumb1 = largePlaceholder.getHeight();
    findMainImg().setPreferredSize(new Dimension(sizethumb, sizethumb1));

    findMainImg(f).getAllStyles().setBgImage(URLImage.createToStorage(largePlaceholder, newsImgFilename + "_0_ y", responsesImg.get(0).get("image_url"), URLImage.RESIZE_SCALE));

    mainImageImgViewer = findMainImg(f).getAllStyles().getBgImage();
    System.out.println("beck0 " + mainImageImgViewer); //it gives null
java codenameone

2 回答

  • 1

    我建议将其设置为样式的bg图像，并将背景行为设置为 SCALE_TO_FILL 或 SCALE_TO_FIT .

    回复于
  • 1

    您正在使用屏幕大小生成占位符图像，并且“横向”中的屏幕宽度大于“纵向” .

    如果您想使图像响应，则必须添加方向更改侦听器，如果您来自纵向，则将下载具有不同大小的另一个图像，反之亦然 .

    private EncodedImage largePlaceholderPortrait;
private EncodedImage largePlaceholderLandscape;
private boolean isPortrait = Display.getInstance().isPortrait();

protected void initVars(Resources res) {
    Image tmp = Image.createImage(Display.getInstance().getDisplayWidth(), Display.getInstance().getDisplayWidth() / 6 * 3, 0);
    Image tmp2 = Image.createImage(Display.getInstance().getDisplayHeight(), Display.getInstance().getDisplayHeight() / 6 * 3, 0);
    largePlaceholderPortrait = EncodedImage.createFromImage(isPortrait ? tmp : tmp2, false);
    largePlaceholderLandscape = EncodedImage.createFromImage(isPortrait ? tmp2 : tmp, false);
}

findMainImg(f).setIcon(URLImage.createToStorage(largePlaceholderPortrait,  isPortrait ? getMainImg + "_0_y_portrait" : getMainImg + "_0_y_landscape", getMainImg, URLImage.RESIZE_SCALE_TO_FILL));


f.addOrientationListener(new ActionListener() {
    @Override
    public void actionPerformed(ActionEvent evt) {
        findMainImg(f).setIcon(URLImage.createToStorage(largePlaceholderPortrait,  isPortrait ? getMainImg + "_0_y_portrait" : getMainImg + "_0_y_landscape", getMainImg, URLImage.RESIZE_SCALE_TO_FILL));
    }
});

//Java 8
f.addOrientationListener((evt) -> {
    findMainImg(f).setIcon(URLImage.createToStorage(largePlaceholderPortrait,  isPortrait ? getMainImg + "_0_y_portrait" : getMainImg + "_0_y_landscape", getMainImg, URLImage.RESIZE_SCALE_TO_FILL));
});
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