一直也是用这个Textview关键字高亮的相关处理，经过一些个需求变化，这里记录下这个工具类，以后备用：
import android.text.SpannableString;
import android.text.Spanned;
import android.text.style.ForegroundColorSpan;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class HighLightKeyWordUtil {
/**
* @param color 关键字颜色
* @param text 文本
* @param keyword 关键字
* @return
*/
public static SpannableString getHighLightKeyWord(int color, String text, String keyword, boolean ignoreCase) {
SpannableString s = new SpannableString(text);
String wordReg = keyword;
if (ignoreCase){
wordReg = "(?i)"+ keyword; ///< 用(?i)来忽略大小写
}
Pattern p = Pattern.compile(wordReg);
Matcher m = p.matcher(s);
while (m.find()) {
int start = m.start();
int end = m.end();
s.setSpan(new ForegroundColorSpan(color), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
return s;
}
/**
* @param color 关键字颜色
* @param text 文本
* @param keyword 多个关键字数组
* @return
*/
public static SpannableString getHighLightKeyWord(int color, String text,String[] keyword, boolean ignoreCase) {
SpannableString s = new SpannableString(text);
for (int i = 0; i < keyword.length; i++) {
String wordReg = keyword[i];
if (ignoreCase){
wordReg = "(?i)"+ keyword[i]; ///< 用(?i)来忽略大小写
}
Pattern p = Pattern.compile(wordReg);
Matcher m = p.matcher(s);
while (m.find()) {
int start = m.start();
int end = m.end();
s.setSpan(new ForegroundColorSpan(color), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
return s;
}
/**
* @param color 关键字背景颜色
* @param text 文本
* @param keyword 关键字
* @return
*/
public static SpannableString getBackgroudKeyWord(int tvcolor, int color, String text, String keyword) {
SpannableString s = new SpannableString(text);
Pattern p = Pattern.compile(keyword);
Matcher m = p.matcher(s);
//while (m.find()) {
if (m.find()) {
int start = m.start();
int end = m.end();
s.setSpan(new RoundBackgroundColorSpan(color, tvcolor, 10), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
return s;
}
/**
*
* @param tvcolor 关键字颜色
* @param color 关键字背景颜色
* @param text 文本
* @param keywords 多个关键字数组
* @return
*/
public static SpannableString getBackgroudKeyWord(int tvcolor, int color, String text, String[] keywords) {
SpannableString s = new SpannableString(text);
for (int i = 0; i < keywords.length; i++) {
Pattern p = Pattern.compile(keywords[i]);
Matcher m = p.matcher(s);
//while (m.find()) {
if (m.find()) {
int start = m.start();
int end = m.end();
s.setSpan(new RoundBackgroundColorSpan(color, tvcolor, 10), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
return s;
}
/**
*
* @param tvcolor 关键字颜色数组
* @param color 关键字背景颜色数组
* @param s SpannableString
* @param keywords 多个关键字数组
* @return
*/
public static SpannableString getBackgroudKeyWord(int[] tvcolor, int[] color, SpannableString s, String[] keywords) {
int strLength = 0;
for (int i = 0; i < keywords.length; i++) {
///< 必须是开头的才标记背景，所以索引必须小于开头内容长度
strLength += keywords[i].length();
Pattern p = Pattern.compile(keywords[i]);
Matcher m = p.matcher(s);
///< 只找开头的，标题中的不找
//while (m.find()) {
//if (m.find()) {
if (m.find() && m.start() < strLength) {
int start = m.start();
int end = m.end();
s.setSpan(new RoundBackgroundColorSpan(color[i], tvcolor[i], 10), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
return s;
}
/**
*
* @param tvcolor 关键字颜色数组
* @param color 关键字背景颜色数组
* @param text 文本
* @param keywords 多个关键字数组
* @return
*/
public static SpannableString getBackgroudKeyWord(int[] tvcolor, int[] color, String text, String[] keywords) {
SpannableString s = new SpannableString(text);
int strLength = 0;
for (int i = 0; i < keywords.length; i++) {
///< 必须是开头的才标记背景，所以索引必须小于开头内容长度
strLength += keywords[i].length();
Pattern p = Pattern.compile(keywords[i]);
Matcher m = p.matcher(s);
///< 只找开头的，标题中的不找
//while (m.find()) {
//if (m.find()) {
if (m.find() && m.start() < strLength) {
int start = m.start();
int end = m.end();
s.setSpan(new RoundBackgroundColorSpan(color[i], tvcolor[i], 10), start, end,
Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
}
}
return s;
}
}
注意一下大小写的处理
image
注意一下关键字背景高亮只处理字符串开始出现的关键字的情况：
image
其中： RoundBackgroundColorSpan.java
package com.lieyunwang.app.common.utils.textview;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.RectF;
import android.text.style.ReplacementSpan;
/*
*@Description: 字体添加圆角背景
*@Author: hl
*@Time: 2018/7/10 11:34
*/
public class RoundBackgroundColorSpan extends ReplacementSpan {
private int bgColor;
private int textColor;
private int mSize;
private int radius;
public RoundBackgroundColorSpan(int bgColor, int textColor, int radius) {
super();
this.bgColor = bgColor;
this.textColor = textColor;
this.radius = radius;
}
@Override
public int getSize(Paint paint, CharSequence text, int start, int end, Paint.FontMetricsInt fm) {
//设置宽度为文字宽度加16dp
return (mSize = (int) (paint.measureText(text, start, end) + 2 * radius));
}
@Override
public void draw(Canvas canvas, CharSequence text, int start, int end, float x, int top, int y, int bottom, Paint paint) {
int originalColor = paint.getColor();
paint.setColor(this.bgColor);
paint.setAntiAlias(true);// 设置画笔的锯齿效果
//画圆角矩形背景
RectF oval = new RectF(
x > 5 ? (x - 5) : x,
(y + paint.ascent()) > 5 ? ((y + paint.ascent()) - 5): (y + paint.ascent()),
x + mSize + 5,
y + paint.descent() + 5);
//设置文字背景矩形，x为span其实左上角相对整个TextView的x值，y为span左上角相对整个View的y值。paint.ascent()获得文字上边缘，paint.descent()获得文字下边缘
canvas.drawRoundRect(oval, radius, radius, paint);//绘制圆角矩形，第二个参数是x半径，第三个参数是y半径
paint.setColor(this.textColor);
//画文字
canvas.drawText(text, start, end, x + radius, y, paint);
//将paint复原
paint.setColor(originalColor);
}
}
使用示例：
((TextView) getView(viewId)).setText(HighLightKeyWordUtil.getBackgroudKeyWord(
new int[]{Color.parseColor("#ffffff"), Color.parseColor("#ffffff")},
new int[]{Color.parseColor("#febc48"), Color.parseColor("#f13b2f")},
content, new String[]{"独家", "首发"}));
效果：
image.png
具体可以根据实际需求进行修改和完善即可....代码不是特别精简，可以考虑优化下，提出共用方法。小白觉得还好就懒得提了....
