阅读动画

app/src/main/java/io/legado/app/ui/main/bookshelf/books/BooksFragment.kt

@@ -10,7 +10,6 @@ import android.view.ViewConfiguration
 import androidx.core.app.ActivityOptionsCompat
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
-import androidx.core.view.doOnPreDraw
 import androidx.core.view.isGone
 import androidx.fragment.app.activityViewModels
 import androidx.lifecycle.Lifecycle
@@ -116,10 +115,6 @@ class BooksFragment() : BaseFragment(R.layout.fragment_books),
     private var enableRefresh = true
 
     override fun onFragmentCreated(view: View, savedInstanceState: Bundle?) {
-        postponeEnterTransition()
-        view.doOnPreDraw {
-            startPostponedEnterTransition()
-        }
         arguments?.let {
             position = it.getInt("position", 0)
             groupId = it.getLong("groupId", -1)
@@ -248,11 +243,10 @@ class BooksFragment() : BaseFragment(R.layout.fragment_books),
             ).catch {
                 AppLog.put("书架更新出错", it)
             }.conflate().flowOn(Dispatchers.Default).collect { list ->
-                if (view == null) return@collect
                 binding.emptyView.isGone = list.isNotEmpty()
                 binding.refreshLayout.isEnabled = enableRefresh && list.isNotEmpty()
                 booksAdapter.setItems(list)
-                delay(500)
+                delay(100)
             }
         }
     }

app/src/main/java/io/legado/app/ui/main/bookshelf/books/BookshelfFragment2.kt

@@ -11,7 +11,6 @@ import androidx.appcompat.widget.SearchView
 import androidx.core.app.ActivityOptionsCompat
 import androidx.core.view.ViewCompat
 import androidx.core.view.WindowInsetsCompat
-import androidx.core.view.doOnPreDraw
 import androidx.core.view.isGone
 import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.lifecycleScope
@@ -52,7 +51,6 @@ import io.legado.app.utils.showDialogFragment
 import io.legado.app.utils.viewbindingdelegate.viewBinding
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.Job
-import kotlinx.coroutines.delay
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.conflate
 import kotlinx.coroutines.flow.flowOn
@@ -120,10 +118,6 @@ class BookshelfFragment2() : BaseBookshelfFragment(R.layout.fragment_bookshelf2)
 
     override fun onFragmentCreated(view: View, savedInstanceState: Bundle?) {
         setSupportToolbar(binding.topBar)
-        postponeEnterTransition()
-        view.doOnPreDraw {
-            startPostponedEnterTransition()
-        }
         initRecyclerView()
         initBookGroupData()
         initAllBooksData()
@@ -305,11 +299,10 @@ class BookshelfFragment2() : BaseBookshelfFragment(R.layout.fragment_bookshelf2)
             ).catch {
                 AppLog.put("书架更新出错", it)
             }.conflate().flowOn(Dispatchers.Default).collect { list ->
-                if (view == null) return@collect
-                binding.emptyView.isGone = list.isNotEmpty()
-                binding.refreshLayout.isEnabled = enableRefresh && list.isNotEmpty()
+                books = list
                 booksAdapter.updateItems()
-                delay(500)
+                binding.emptyView.isGone = getItemCount() > 0
+                binding.refreshLayout.isEnabled = enableRefresh && getItemCount() > 0
             }
         }
     }

app/src/main/java/io/legado/app/ui/main/bookshelf/books/styleDefalut/BaseBooksAdapter.kt

@@ -12,6 +12,13 @@ import io.legado.app.data.entities.Book
 abstract class BaseBooksAdapter<VB : ViewBinding>(context: Context) :
     DiffRecyclerAdapter<Book, VB>(context) {
 
+    init {
+        setHasStableIds(true)
+    }
+    override fun getItemId(position: Int): Long {
+        return getItems()[position].bookUrl.hashCode().toLong()
+    }
+
     override val keepScrollPosition = true
 
     override val diffItemCallback: DiffUtil.ItemCallback<Book> =

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

@@ -11,6 +11,7 @@ import kotlinx.coroutines.flow.FlowCollector
 import kotlinx.coroutines.flow.buffer
 import kotlinx.coroutines.flow.callbackFlow
 import kotlinx.coroutines.flow.channelFlow
+import kotlinx.coroutines.flow.combine
 import kotlinx.coroutines.flow.conflate
 import kotlinx.coroutines.flow.filterNotNull
 import kotlinx.coroutines.flow.firstOrNull
@@ -235,29 +236,16 @@ fun <T> Flow<T>.flowWithLifecycleAndDatabaseChange(
 
 fun <T> Flow<T>.flowWithLifecycleAndDatabaseChangeFirst(
     lifecycle: Lifecycle,
-    minActiveState: Lifecycle.State = Lifecycle.State.STARTED,
+    minActiveState: Lifecycle.State = Lifecycle.State.RESUMED,
     table: String
 ): Flow<T> = callbackFlow {
-    var update = 0
-    val isActive = lifecycle.currentState.isAtLeast(minActiveState)
-    val channel = appDb.invalidationTracker
-        .createFlow(table, emitInitialState = isActive)
+    val invalidationFlow = appDb.invalidationTracker
+        .createFlow(table, emitInitialState = true)
         .conflate()
-        .onEach { update++ }
-        .produceIn(this)
-    if (!isActive) {
-        firstOrNull()?.let {
-            send(it)
-        }
-    }
+
     lifecycle.repeatOnLifecycle(minActiveState) {
-        if (update == 0) {
-            channel.receive()
-        }
-        this@flowWithLifecycleAndDatabaseChangeFirst.collect {
-            update = 0
-            send(it)
-        }
+        combine(this@flowWithLifecycleAndDatabaseChangeFirst, invalidationFlow) { data, _ -> data }
+            .collect { send(it) }
     }
     close()
 }