optimize memu

app/src/main/java/com/lizongying/mytv/CardAdapter.kt

@@ -2,21 +2,24 @@ package com.lizongying.mytv
 
 import android.graphics.Color
 import android.view.ContextThemeWrapper
-import android.view.MotionEvent
 import android.view.View
 import android.view.ViewGroup
+import android.view.animation.Animation
 import android.view.animation.ScaleAnimation
 import android.widget.ImageView
 import androidx.leanback.widget.ImageCardView
 import androidx.lifecycle.LifecycleOwner
-import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.bumptech.glide.Glide
 import com.lizongying.mytv.models.TVListViewModel
 import com.lizongying.mytv.models.TVViewModel
 
 
-class CardAdapter(private val owner: LifecycleOwner, private var tvListViewModel: TVListViewModel) :
+class CardAdapter(
+    private val recyclerView: RecyclerView,
+    private val owner: LifecycleOwner,
+    private var tvListViewModel: TVListViewModel
+) :
     RecyclerView.Adapter<CardAdapter.ViewHolder>() {
 
     private var listener: ItemListener? = null
@@ -24,22 +27,32 @@ class CardAdapter(private val owner: LifecycleOwner, private var tvListViewModel
     override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ViewHolder {
         val cardView = object :
             ImageCardView(ContextThemeWrapper(parent.context, R.style.CustomImageCardTheme)) {}
-        startScaleAnimation(cardView, 1.0f, 0.9f)
         cardView.isFocusable = true
         cardView.isFocusableInTouchMode = true
 
         return ViewHolder(cardView)
     }
 
-    private fun startScaleAnimation(view: View, fromScale: Float, toScale: Float) {
+    private fun startScaleAnimation(view: View, fromScale: Float, toScale: Float, duration: Long) {
         val scaleAnimation = ScaleAnimation(
             fromScale, toScale,
             fromScale, toScale,
             ScaleAnimation.RELATIVE_TO_SELF, 0.5f,
             ScaleAnimation.RELATIVE_TO_SELF, 0.5f
         )
-        scaleAnimation.duration = 200
+        scaleAnimation.duration = duration
         scaleAnimation.fillAfter = true
+        scaleAnimation.setAnimationListener(object : Animation.AnimationListener {
+            override fun onAnimationStart(animation: Animation?) {
+            }
+
+            override fun onAnimationEnd(animation: Animation?) {
+                view.tag = toScale
+            }
+
+            override fun onAnimationRepeat(animation: Animation?) {
+            }
+        })
 
         view.startAnimation(scaleAnimation)
     }
@@ -50,12 +63,20 @@ class CardAdapter(private val owner: LifecycleOwner, private var tvListViewModel
         val tvViewModel = item as TVViewModel
         val cardView = viewHolder.view as ImageCardView
 
-        val onFocusChangeListener = View.OnFocusChangeListener { _, hasFocus ->
+        startScaleAnimation(cardView, 1.0f, 0.9f, 0)
+
+        val onFocusChangeListener = View.OnFocusChangeListener { view, hasFocus ->
             listener?.onItemFocusChange(item, hasFocus)
+
             if (hasFocus) {
-                startScaleAnimation(cardView, 0.9f, 1.0f)
+                startScaleAnimation(cardView, 0.9f, 1.0f, 200)
-            } else {
+
-                startScaleAnimation(cardView, 1.0f, 0.9f)
+                for (i in 0 until recyclerView.childCount) {
+                    val v = recyclerView.getChildAt(i)
+                    if (v != view && v.tag != 0.9f) {
+                        startScaleAnimation(v, 1.0f, 0.9f, 200)
+                    }
+                }
             }
         }
 
@@ -66,7 +87,6 @@ class CardAdapter(private val owner: LifecycleOwner, private var tvListViewModel
         }
 
         cardView.titleText = tvViewModel.title.value
-        cardView.tag = tvViewModel.videoUrl.value
 
         when (tvViewModel.title.value) {
             "CCTV8K 超高清" -> Glide.with(viewHolder.view.context)

app/src/main/java/com/lizongying/mytv/MainFragment.kt

@@ -74,7 +74,8 @@ class MainFragment : Fragment(), CardAdapter.ItemListener {
                 }
                 tvListViewModel.maxNum.add(v.size)
 
-                val adapter = CardAdapter(viewLifecycleOwner, tvListViewModelCurrent)
+                val adapter =
+                    CardAdapter(itemBinding.rowItems, viewLifecycleOwner, tvListViewModelCurrent)
                 rowList.add(itemBinding.rowItems)
 
                 adapter.setItemListener(this)
@@ -86,13 +87,7 @@ class MainFragment : Fragment(), CardAdapter.ItemListener {
 
                 itemBinding.rowItems.addOnScrollListener(object : RecyclerView.OnScrollListener() {
                     override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
-//                        super.onScrolled(recyclerView, dx, dy)
+                        super.onScrolled(recyclerView, dx, dy)
-//                        val layoutManager = recyclerView.layoutManager as LinearLayoutManager
-//                        val firstVisibleItemPosition = layoutManager.findFirstVisibleItemPosition()
-//                        val firstVisibleViewHolder = recyclerView.findViewHolderForAdapterPosition(firstVisibleItemPosition)
-//                        if (firstVisibleViewHolder != null && !firstVisibleViewHolder.itemView.hasFocus()) {
-//                            firstVisibleViewHolder.itemView.requestFocus()
-//                        }
                         (activity as MainActivity).mainActive()
                     }
                 })