feat: 优化

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

@@ -280,33 +280,33 @@ class ReadBookActivity : VMBaseActivity<ReadBookViewModel>(R.layout.activity_boo
      */
     override fun onKeyDown(keyCode: Int, event: KeyEvent?): Boolean {
         when (keyCode) {
-            KeyEvent.KEYCODE_VOLUME_UP -> {
-                if (volumeKeyPage(PageDelegate.Direction.PREV)) {
+            getPrefInt(PreferKey.prevKey) -> {
+                if (keyCode != KeyEvent.KEYCODE_UNKNOWN) {
+                    page_view.pageDelegate?.keyTurnPage(PageDelegate.Direction.PREV)
                     return true
                 }
             }
-            KeyEvent.KEYCODE_VOLUME_DOWN -> {
-                if (volumeKeyPage(PageDelegate.Direction.NEXT)) {
+            getPrefInt(PreferKey.nextKey) -> {
+                if (keyCode != KeyEvent.KEYCODE_UNKNOWN) {
+                    page_view.pageDelegate?.keyTurnPage(PageDelegate.Direction.NEXT)
                     return true
                 }
             }
-            KeyEvent.KEYCODE_SPACE -> {
-                page_view.pageDelegate?.keyTurnPage(PageDelegate.Direction.NEXT)
+            KeyEvent.KEYCODE_VOLUME_UP -> {
+                if (volumeKeyPage(PageDelegate.Direction.PREV)) {
                     return true
                 }
-            getPrefInt(PreferKey.prevKey) -> {
-                if (keyCode != KeyEvent.KEYCODE_UNKNOWN) {
-                    page_view.pageDelegate?.keyTurnPage(PageDelegate.Direction.PREV)
+            }
+            KeyEvent.KEYCODE_VOLUME_DOWN -> {
+                if (volumeKeyPage(PageDelegate.Direction.NEXT)) {
                     return true
                 }
             }
-            getPrefInt(PreferKey.nextKey) -> {
-                if (keyCode != KeyEvent.KEYCODE_UNKNOWN) {
+            KeyEvent.KEYCODE_SPACE -> {
                 page_view.pageDelegate?.keyTurnPage(PageDelegate.Direction.NEXT)
                 return true
             }
         }
-        }
         return super.onKeyDown(keyCode, event)
     }