如何RichTextEdit
使用 RIM 4.5 API 创建包含多种颜色的文本?
例如我想创建一个RichTextEdit
如下:
- 文本是“Hello BB world”
- “你好”应该是蓝色的
- “BB世界”应该是红色的
- “BB”应该是
ITALIC
- “你好”应该是
BOLD
主要问题是获取颜色,而不是粗体和斜体。
我尝试过覆盖RichTextEdit.paint
函数,但这会格式化整个字符串的颜色,而不仅仅是它的子字符串!
这是我实现的代码,用于使文本变为粗体和斜体,并覆盖绘制以更改整个字符串的颜色:
public final class RichTextFieldSample extends UiApplication
{
public static void main(String[] args)
{
RichTextFieldSample theApp = new RichTextFieldSample();
theApp.enterEventDispatcher();
}
public RichTextFieldSample()
{
String richText = "This is how you create text with formatting!!!";
Font fonts[] = new Font[3];
int[] offset = new int[4];
byte[] attribute = new byte[3];
fonts[0] = Font.getDefault();
fonts[1] = Font.getDefault().derive(Font.BOLD);
fonts[2] = Font.getDefault().derive(Font.BOLD | Font.ITALIC);
offset[0] = 0;
attribute[0] = 2;
offset[1] = 4;
attribute[1] = 0;
offset[2] = 33;
attribute[2] = 1;
offset[3] = richText.length();
RichTextField rtField = new RichTextField
(richText, offset, attribute, fonts,
RichTextField.USE_TEXT_WIDTH) {
protected void paint(Graphics graphics) {
graphics.clear();
graphics.setColor(0x0000FF);
super.paint(graphics);
}
};
MainScreen mainScreen = new MainScreen();
mainScreen.setTitle(new LabelField
("RichTextFieldSample Sample",
LabelField.ELLIPSIS | LabelField.USE_ALL_WIDTH));
mainScreen.add(rtField);
pushScreen(mainScreen);
}
}