[英]How to convert a (Java source code) string to (HTML Entity (hex)) string in java?
[英]How to convert HTML String with RGB colors to HTML String with HEX colors in Android JAVA
我有以下 html 文本(示例):
<p><span style="color: rgb(33, 150, 243);">This is a <span style="background-color: rgb(255, 235, 59);">test !!</span></span></p>
我正在嘗試在 TextView 中顯示此文本。
textview.setText(Html.fromHtml(string));
它有效,但不顯示顏色。
為此,我必須以這種形式轉換文本(使用十六進制顏色)
<p><span style="color: #2196f3;">This is a <span style="background-color: #ffeb3b;">test !!</span></span></p>
我該怎么做?
我找不到解決方案......有沒有人遇到過這個問題並且可以幫助我?
提前致謝 !
評論中的解釋:
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Stackoverflow52173062 {
public static void main(final String[] args) {
String html = "<p><span style=\"color: rgb(33, 150, 243);\">This is a <span style=\"background-color: rgb(255, 235, 59);\">test !!</span></span></p>";
html = replaceRGBColorsWithHex(html);
// final String
System.out.println(html);
}
private static String replaceRGBColorsWithHex(String html) {
// using regular expression to find all occurences of rgb(a,b,c) using
// capturing groups to get separate numbers.
Pattern p = Pattern.compile("(rgb\\(\\s*(\\d+)\\s*,\\s*(\\d+)\\s*,\\s*(\\d+)\\s*\\))");
Matcher m = p.matcher(html);
while (m.find()) {
// get whole matched rgb(a,b,c) text
String foundRGBColor = m.group(1);
System.out.println("Found: " + foundRGBColor);
// get r value
String rString = m.group(2);
// get g value
String gString = m.group(3);
// get b value
String bString = m.group(4);
System.out.println(" separated r value: " + rString);
System.out.println(" separated g value: " + gString);
System.out.println(" separated b value: " + bString);
// converting numbers from string to int
int rInt = Integer.parseInt(rString);
int gInt = Integer.parseInt(gString);
int bInt = Integer.parseInt(bString);
// converting int to hex value
String rHex = Integer.toHexString(rInt);
String gHex = Integer.toHexString(gInt);
String bHex = Integer.toHexString(bInt);
// add leading zero if number is small to avoid converting
// rgb(1,2,3) to rgb(#123)
String rHexFormatted = String.format("%2s", rHex).replace(" ", "0");
String gHexFormatted = String.format("%2s", gHex).replace(" ", "0");
String bHexFormatted = String.format("%2s", bHex).replace(" ", "0");
System.out.println(" converted " + rString + " to hex: " + rHexFormatted);
System.out.println(" converted " + gString + " to hex: " + gHexFormatted);
System.out.println(" converted " + bString + " to hex:" + bHexFormatted);
// concatenate new color in hex
String hexColorString = "#" + rHexFormatted + gHexFormatted + bHexFormatted ;
System.out.println(" replacing " + foundRGBColor + " with " + hexColorString);
html = html.replaceAll(Pattern.quote(foundRGBColor), hexColorString);
}
return html;
}
}
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