优化翻页动画

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

@@ -198,6 +198,8 @@ abstract class BaseReadBookActivity :
      * 保持亮屏
      */
     fun keepScreenOn(on: Boolean) {
+        val isScreenOn = (window.attributes.flags and WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON) != 0
+        if (on == isScreenOn) return
         if (on) {
             window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON)
         } else {

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

@@ -160,7 +160,6 @@ class ReadView(context: Context, attrs: AttributeSet) :
      */
     @SuppressLint("ClickableViewAccessibility")
     override fun onTouchEvent(event: MotionEvent): Boolean {
-        callBack.screenOffTimerStart()
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R) {
             val insets =
                 this.rootWindowInsets.getInsetsIgnoringVisibility(WindowInsets.Type.mandatorySystemGestures())
@@ -174,6 +173,7 @@ class ReadView(context: Context, attrs: AttributeSet) :
 
         when (event.action) {
             MotionEvent.ACTION_DOWN -> {
+                callBack.screenOffTimerStart()
                 if (isTextSelected) {
                     curPage.cancelSelect()
                     isTextSelected = false
@@ -205,6 +205,7 @@ class ReadView(context: Context, attrs: AttributeSet) :
                 }
             }
             MotionEvent.ACTION_UP -> {
+                callBack.screenOffTimerStart()
                 removeCallbacks(longPressRunnable)
                 if (!pressDown) return true
                 pressDown = false

app/src/main/java/io/legado/app/utils/ViewExtensions.kt

@@ -133,6 +133,7 @@ fun View.screenshot(): Bitmap? {
         c.translate(-scrollX.toFloat(), -scrollY.toFloat())
         this.draw(c)
         c.setBitmap(null)
+        screenshot.prepareToDraw()
         screenshot
     } else {
         null