feat: 优化代码

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

@@ -6,41 +6,41 @@ import kotlin.math.abs
 
 abstract class HorizontalPageDelegate(pageView: PageView) : PageDelegate(pageView) {
 
-    override fun onScroll(
-        e1: MotionEvent,
-        e2: MotionEvent,
-        distanceX: Float,
-        distanceY: Float
-    ): Boolean {
-        if (!isMoved) {
-            if (abs(distanceX) > abs(distanceY)) {
-                if (distanceX < 0) {
-                    //如果上一页不存在
-                    if (!hasPrev()) {
-                        noNext = true
-                        return true
+    override fun onTouch(event: MotionEvent) {
+        when (event.action) {
+            MotionEvent.ACTION_MOVE -> {
+                //判断是否移动了
+                if (!isMoved) {
+                    isMoved = abs(startX - event.x) > slop || abs(startY - event.y) > slop
+                    if (isMoved) {
+                        if (event.x - startX > 0) {
+                            //如果上一页不存在
+                            if (!hasPrev()) {
+                                noNext = true
+                                return
+                            }
+                            setDirection(Direction.PREV)
+                            setBitmap()
+                        } else {
+                            //如果不存在表示没有下一页了
+                            if (!hasNext()) {
+                                noNext = true
+                                return
+                            }
+                            setDirection(Direction.NEXT)
+                            setBitmap()
+                        }
                     }
-                    setDirection(Direction.PREV)
-                    setBitmap()
-                } else {
-                    //如果不存在表示没有下一页了
-                    if (!hasNext()) {
-                        noNext = true
-                        return true
-                    }
-                    setDirection(Direction.NEXT)
-                    setBitmap()
                 }
-                isMoved = true
+                if (isMoved) {
+                    isCancel = if (mDirection == Direction.NEXT) touchX > lastX else touchX < lastX
+                    isRunning = true
+                    //设置触摸点
+                    setTouchPoint(event.x, event.y)
+                }
             }
         }
-        if (isMoved) {
-            isCancel = if (mDirection == Direction.NEXT) distanceX < 0 else distanceX > 0
-            isRunning = true
-            //设置触摸点
-            setTouchPoint(e2.x, e2.y)
-        }
-        return isMoved
+        super.onTouch(event)
     }
 
 }

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

@@ -6,15 +6,14 @@ import android.graphics.Canvas
 import android.graphics.RectF
 import android.view.GestureDetector
 import android.view.MotionEvent
+import android.view.ViewConfiguration
 import android.view.animation.DecelerateInterpolator
 import android.widget.Scroller
 import androidx.annotation.CallSuper
 import com.google.android.material.snackbar.Snackbar
-import io.legado.app.constant.PreferKey
 import io.legado.app.help.AppConfig
 import io.legado.app.ui.book.read.page.ContentView
 import io.legado.app.ui.book.read.page.PageView
-import io.legado.app.utils.getPrefBoolean
 import io.legado.app.utils.screenshot
 import kotlin.math.abs
 
@@ -25,10 +24,12 @@ abstract class PageDelegate(protected val pageView: PageView) :
         pageView.width * 0.66f, pageView.height * 0.66f
     )
     protected val context: Context = pageView.context
+    protected val slop = ViewConfiguration.get(context).scaledTouchSlop
     //起始点
     protected var startX: Float = 0f
     protected var startY: Float = 0f
     //上一个触碰点
+    protected var lastX: Float = 0f
     protected var lastY: Float = 0f
     //触碰点
     protected var touchX: Float = 0f
@@ -52,9 +53,7 @@ abstract class PageDelegate(protected val pageView: PageView) :
     }
 
     private val detector: GestureDetector by lazy {
-        GestureDetector(pageView.context, this).apply {
-            setIsLongpressEnabled(context.getPrefBoolean(PreferKey.textSelectAble))
-        }
+        GestureDetector(pageView.context, this)
     }
 
     var isMoved = false
@@ -70,6 +69,7 @@ abstract class PageDelegate(protected val pageView: PageView) :
     open fun setStartPoint(x: Float, y: Float, invalidate: Boolean = true) {
         startX = x
         startY = y
+        lastX = x
         lastY = y
         touchX = x
         touchY = y
@@ -80,6 +80,7 @@ abstract class PageDelegate(protected val pageView: PageView) :
     }
 
     open fun setTouchPoint(x: Float, y: Float, invalidate: Boolean = true) {
+        lastX = touchX
         lastY = touchY
         touchX = x
         touchY = y

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

@@ -2,7 +2,6 @@ package io.legado.app.ui.book.read.page.delegate
 
 import android.view.MotionEvent
 import android.view.VelocityTracker
-import android.view.ViewConfiguration
 import io.legado.app.ui.book.read.page.PageView
 import kotlin.math.abs
 
@@ -12,7 +11,6 @@ class ScrollPageDelegate(pageView: PageView) : PageDelegate(pageView) {
     private val velocityDuration = 1000
     //速度追踪器
     private val mVelocity: VelocityTracker = VelocityTracker.obtain()
-    private val slop = ViewConfiguration.get(pageView.context).scaledTouchSlop
 
     override fun onAnimStart() {
         //惯性滚动
@@ -39,7 +37,7 @@ class ScrollPageDelegate(pageView: PageView) : PageDelegate(pageView) {
                 mVelocity.computeCurrentVelocity(velocityDuration)
                 setTouchPoint(event.x, event.y)
                 if (!isMoved) {
-                    isMoved = abs(startY - event.y) > slop
+                    isMoved = abs(startX - event.x) > slop || abs(startY - event.y) > slop
                 }
                 if (isMoved) {
                     isRunning = true