设置RichTextField，TextField的背景和字体颜色

问题描述

我们如何在RichTextField中设置背景和字体颜色？我试图覆盖paint（）方法，除了已经描述的，但当我向下滚动时，背景会被擦除或重置为白色背景。

How do we set the background and font colors in a RichTextField? I tried to override the paint() method in addition to what has been described here, but when I scroll down in, the background gets erased or reset to a white background

推荐答案

你可以使用背景：

class ExRichTextField extends RichTextField {

    int mTextColor;

    public ExRichTextField(String text, int bgColor, int textColor) {
        super(text);
        mTextColor = textColor;
        Background background = BackgroundFactory
                .createSolidBackground(bgColor);
        setBackground(background);
    }

    protected void paint(Graphics graphics) {
        graphics.setColor(mTextColor);
        super.paint(graphics);
    }
}

对于RIM 4.5及以下版本，使用paint事件绘制背景

For RIM 4.5 and lower use paint event to draw background youreself:

class ExRichTextField extends RichTextField {

    int mTextColor;
    int mBgColor;

    public ExRichTextField(String text, int bgColor, int textColor) {
        super(text);
        mTextColor = textColor;
        mBgColor = bgColor;
    }

    protected void paint(Graphics graphics) {
        graphics.clear();
        graphics.setColor(mBgColor);
        graphics.fillRect(0, 0, getWidth(), getHeight());
        graphics.setColor(mTextColor);
        super.paint(graphics);
    }
}

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