修复字体变粗后不能变细的bug

app/src/main/java/io/legado/app/ui/book/read/page/provider/ChapterProvider.kt

@@ -85,10 +85,10 @@ object ChapterProvider {
         private set
 
     @JvmStatic
-    val titlePaint: TextPaint = TextPaint()
+    var titlePaint: TextPaint = TextPaint()
 
     @JvmStatic
-    val contentPaint: TextPaint = TextPaint()
+    var contentPaint: TextPaint = TextPaint()
 
     var doublePage = false
         private set
@@ -500,7 +500,10 @@ object ChapterProvider {
      */
     fun upStyle() {
         typeface = getTypeface(ReadBookConfig.textFont)
-        upPaint(typeface)
+        getPaint(typeface).let {
+            titlePaint = it.first
+            contentPaint = it.second
+        }
         //间距
         lineSpacingExtra = ReadBookConfig.lineSpacingExtra
         paragraphSpacing = ReadBookConfig.paragraphSpacing
@@ -535,7 +538,7 @@ object ChapterProvider {
         } ?: Typeface.DEFAULT
     }
 
-    private fun upPaint(typeface: Typeface) {
+    private fun getPaint(typeface: Typeface): Pair<TextPaint, TextPaint> {
         // 字体统一处理
         val bold = Typeface.create(typeface, Typeface.BOLD)
         val normal = Typeface.create(typeface, Typeface.NORMAL)
@@ -556,17 +559,19 @@ object ChapterProvider {
         }
 
         //标题
-        titlePaint.color = ReadBookConfig.textColor
-        titlePaint.letterSpacing = ReadBookConfig.letterSpacing
-        titlePaint.typeface = titleFont
-        titlePaint.textSize = with(ReadBookConfig) { textSize + titleSize }.sp.toFloat()
-        titlePaint.isAntiAlias = true
-        //正文
-        contentPaint.color = ReadBookConfig.textColor
-        contentPaint.letterSpacing = ReadBookConfig.letterSpacing
-        contentPaint.typeface = textFont
-        contentPaint.textSize = ReadBookConfig.textSize.sp.toFloat()
-        contentPaint.isAntiAlias = true
+        val tPaint = TextPaint()
+        tPaint.color = ReadBookConfig.textColor
+        tPaint.letterSpacing = ReadBookConfig.letterSpacing
+        tPaint.typeface = titleFont
+        tPaint.textSize = with(ReadBookConfig) { textSize + titleSize }.sp.toFloat()
+        tPaint.isAntiAlias = true
+        val cPaint = TextPaint()
+        cPaint.color = ReadBookConfig.textColor
+        cPaint.letterSpacing = ReadBookConfig.letterSpacing
+        cPaint.typeface = textFont
+        cPaint.textSize = ReadBookConfig.textSize.sp.toFloat()
+        cPaint.isAntiAlias = true
+        return Pair(tPaint, cPaint)
     }
 
     /**