优化

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

@@ -595,19 +595,25 @@ class ReadBookActivity : ReadBookBaseActivity(),
     }
 
     private fun autoPagePlus() {
+        var delayMillis = ReadBookConfig.autoReadSpeed * 1000L / binding.readView.height
+        var scrollOffset = 1
+        if (delayMillis < 20) {
+            scrollOffset = 20 / delayMillis.toInt()
+            delayMillis = 20
+        }
         mHandler.removeCallbacks(autoPageRunnable)
         if (binding.readView.isScroll) {
-            binding.readView.curPage.scroll(-binding.readView.height / ReadBookConfig.autoReadSpeed / 50)
+            binding.readView.curPage.scroll(-scrollOffset)
         } else {
-            autoPageProgress++
-            if (autoPageProgress >= ReadBookConfig.autoReadSpeed * 50) {
+            autoPageProgress += scrollOffset
+            if (autoPageProgress >= binding.readView.height) {
                 autoPageProgress = 0
                 binding.readView.fillPage(PageDirection.NEXT)
             } else {
                 binding.readView.invalidate()
             }
         }
-        mHandler.postDelayed(autoPageRunnable, 20)
+        mHandler.postDelayed(autoPageRunnable, delayMillis)
     }
 
     override fun openSourceEditActivity() {

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

@@ -122,9 +122,9 @@ class ReadView(context: Context, attrs: AttributeSet) :
         super.dispatchDraw(canvas)
         pageDelegate?.onDraw(canvas)
         if (!isInEditMode && callBack.isAutoPage && !isScroll) {
+            // TODO 自动翻页
             nextPage.screenshot()?.let {
-                val bottom =
-                    height * callBack.autoPageProgress / (ReadBookConfig.autoReadSpeed * 50)
+                val bottom = callBack.autoPageProgress
                 autoPageRect.set(0, 0, width, bottom)
                 canvas.drawBitmap(it, autoPageRect, autoPageRect, null)
                 canvas.drawRect(