优化

app/src/main/java/io/legado/app/model/webBook/SearchModel.kt

@@ -17,8 +17,10 @@ import kotlinx.coroutines.Job
 import kotlinx.coroutines.asCoroutineDispatcher
 import kotlinx.coroutines.currentCoroutineContext
 import kotlinx.coroutines.ensureActive
+import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.collect
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.flow.flow
 import kotlinx.coroutines.flow.onCompletion
 import kotlinx.coroutines.flow.onEach
@@ -39,6 +41,7 @@ class SearchModel(private val scope: CoroutineScope, private val callBack: CallB
     private var bookSourceParts = emptyList<BookSourcePart>()
     private var searchBooks = arrayListOf<SearchBook>()
     private var searchJob: Job? = null
+    private var workingState = MutableStateFlow(true)
 
 
     private fun initSearchPool() {
@@ -80,6 +83,7 @@ class SearchModel(private val scope: CoroutineScope, private val callBack: CallB
                     bs.getBookSource()?.let {
                         emit(it)
                     }
+                    workingState.first { it }
                 }
             }.onStart {
                 callBack.onSearchStart()
@@ -176,6 +180,14 @@ class SearchModel(private val scope: CoroutineScope, private val callBack: CallB
         }
     }
 
+    fun pause() {
+        workingState.value = false
+    }
+
+    fun resume() {
+        workingState.value = true
+    }
+
     fun cancelSearch() {
         close()
         callBack.onSearchCancel()

app/src/main/java/io/legado/app/ui/book/search/SearchActivity.kt

@@ -12,7 +12,9 @@ import androidx.activity.viewModels
 import androidx.appcompat.widget.SearchView
 import androidx.core.os.bundleOf
 import androidx.core.view.isVisible
+import androidx.lifecycle.Lifecycle
 import androidx.lifecycle.lifecycleScope
+import androidx.lifecycle.repeatOnLifecycle
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import com.google.android.flexbox.FlexboxLayoutManager
@@ -49,6 +51,7 @@ import io.legado.app.utils.viewbindingdelegate.viewBinding
 import io.legado.app.utils.visible
 import kotlinx.coroutines.Dispatchers.IO
 import kotlinx.coroutines.Job
+import kotlinx.coroutines.awaitCancellation
 import kotlinx.coroutines.flow.catch
 import kotlinx.coroutines.flow.conflate
 import kotlinx.coroutines.flow.flowOn
@@ -304,6 +307,16 @@ class SearchActivity : VMBaseActivity<ActivityBookSearchBinding, SearchViewModel
                 groups = it
             }
         }
+        lifecycleScope.launch {
+            repeatOnLifecycle(Lifecycle.State.RESUMED) {
+                viewModel.resume()
+                try {
+                    awaitCancellation()
+                } finally {
+                    viewModel.pause()
+                }
+            }
+        }
     }
 
     /**

app/src/main/java/io/legado/app/ui/book/search/SearchViewModel.kt

@@ -117,6 +117,14 @@ class SearchViewModel(application: Application) : BaseViewModel(application) {
         searchModel.cancelSearch()
     }
 
+    fun pause() {
+        searchModel.pause()
+    }
+
+    fun resume() {
+        searchModel.resume()
+    }
+
     /**
      * 保存搜索关键字
      */