feat: 优化代码

app/src/main/java/io/legado/app/help/ReadBookConfig.kt

@@ -165,10 +165,10 @@ object ReadBookConfig {
             if (shareLayout) shareConfig.paragraphSpacing = value
             else durConfig.paragraphSpacing = value
 
-    var titleCenter: Boolean
-        get() = if (shareLayout) shareConfig.titleCenter else durConfig.titleCenter
+    var titleMode: Int
+        get() = if (shareLayout) shareConfig.titleMode else durConfig.titleMode
         set(value) =
-            if (shareLayout) shareConfig.titleCenter = value else durConfig.titleCenter = value
+            if (shareLayout) shareConfig.titleMode = value else durConfig.titleMode = value
 
     var paddingBottom: Int
         get() = if (shareLayout) shareConfig.paddingBottom else durConfig.paddingBottom
@@ -253,7 +253,7 @@ object ReadBookConfig {
         var letterSpacing: Float = 0.5f,//字间距
         var lineSpacingExtra: Int = 12,//行间距
         var paragraphSpacing: Int = 12,//段距
-        var titleCenter: Boolean = true,//标题居中
+        var titleMode: Int = 0,//标题居中
         var paddingBottom: Int = 6,
         var paddingLeft: Int = 16,
         var paddingRight: Int = 16,

app/src/main/java/io/legado/app/ui/book/read/config/ReadStyleDialog.kt

@@ -32,6 +32,7 @@ import org.jetbrains.anko.sdk27.listeners.onLongClick
 class ReadStyleDialog : DialogFragment(), FontSelectDialog.CallBack {
 
     val callBack get() = activity as? ReadBookActivity
+    lateinit var titleModes: Array<String>
 
     override fun onStart() {
         super.onStart()
@@ -61,6 +62,7 @@ class ReadStyleDialog : DialogFragment(), FontSelectDialog.CallBack {
 
     override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
         super.onViewCreated(view, savedInstanceState)
+        titleModes = requireContext().resources.getStringArray(R.array.title_mode)
         initView()
         initData()
         initViewEvent()
@@ -97,13 +99,13 @@ class ReadStyleDialog : DialogFragment(), FontSelectDialog.CallBack {
         chinese_converter.onChanged {
             postEvent(EventBus.UP_CONFIG, true)
         }
-        tv_title_center.onClick {
-            ReadBookConfig.apply {
-                titleCenter = !titleCenter
-                tv_title_center.isSelected = titleCenter
-            }
+        tv_title_mode.onClick {
+            requireContext().selector("标题模式", titleModes.toList()) { _, index ->
+                ReadBookConfig.titleMode = index
+                tv_title_mode.text = titleModes[index]
                 postEvent(EventBus.UP_CONFIG, true)
             }
+        }
         tv_text_bold.onClick {
             ReadBookConfig.apply {
                 textBold = !textBold
@@ -187,7 +189,7 @@ class ReadStyleDialog : DialogFragment(), FontSelectDialog.CallBack {
 
     private fun upStyle() {
         ReadBookConfig.let {
-            tv_title_center.isSelected = it.titleCenter
+            tv_title_mode.text = titleModes.getOrElse(it.titleMode) { titleModes[0] }
             tv_text_bold.isSelected = it.textBold
             dsb_text_size.progress = it.textSize - 5
             dsb_text_letter_spacing.progress = (it.letterSpacing * 100).toInt() + 50

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

@@ -153,7 +153,7 @@ object ChapterProvider {
                 addCharsToLineFirst(textLine, words, textPaint, desiredWidth)
             } else if (lineIndex == layout.lineCount - 1) {
                 //最后一行
-                val x = if (isTitle && ReadBookConfig.titleCenter)
+                val x = if (isTitle && ReadBookConfig.titleMode == 1)
                     (visibleWidth - layout.getLineWidth(lineIndex)) / 2
                 else 0f
                 addCharsToLineLast(textLine, words, stringBuilder, textPaint, x)

app/src/main/res/layout/dialog_read_book_style.xml

@@ -10,7 +10,7 @@
     android:padding="10dp">
 
     <io.legado.app.ui.widget.text.StrokeTextView
-        android:id="@+id/tv_title_center"
+        android:id="@+id/tv_title_mode"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:paddingLeft="6dp"
@@ -34,7 +34,7 @@
         android:text="@string/text_bold"
         android:gravity="center"
         android:textSize="14sp"
-        app:layout_constraintLeft_toRightOf="@+id/tv_title_center"
+        app:layout_constraintLeft_toRightOf="@+id/tv_title_mode"
         app:layout_constraintRight_toLeftOf="@+id/tv_text_font"
         app:layout_constraintTop_toTopOf="parent" />