优化

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

@@ -12,6 +12,7 @@ import io.legado.app.data.entities.SearchBook
 import io.legado.app.data.entities.SearchKeyword
 import io.legado.app.help.config.AppConfig
 import io.legado.app.model.webBook.SearchModel
+import io.legado.app.utils.DelayLiveData
 import io.legado.app.utils.toastOnUi
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.mapLatest
@@ -21,15 +22,12 @@ class SearchViewModel(application: Application) : BaseViewModel(application) {
     val handler = Handler(Looper.getMainLooper())
     val bookshelf = hashSetOf<String>()
     val upAdapterLiveData = MutableLiveData<String>()
-    var searchBookLiveData = MutableLiveData<List<SearchBook>>()
+    var searchBookLiveData = DelayLiveData<List<SearchBook>>(1000)
     val searchScope: SearchScope = SearchScope(AppConfig.searchScope)
     var searchFinishCallback: ((isEmpty: Boolean) -> Unit)? = null
     var isSearchLiveData = MutableLiveData<Boolean>()
     var searchKey: String = ""
     private var searchID = 0L
-    private var searchResult = arrayListOf<SearchBook>()
-    private val sendRunnable = Runnable { upAdapter() }
-    private var postTime = 0L
     private val searchModel = SearchModel(viewModelScope, object : SearchModel.CallBack {
 
         override fun getSearchScope(): SearchScope {
@@ -41,8 +39,7 @@ class SearchViewModel(application: Application) : BaseViewModel(application) {
         }
 
         override fun onSearchSuccess(searchBooks: ArrayList<SearchBook>) {
-            searchResult = searchBooks
-            upAdapter()
+            searchBookLiveData.postValue(searchBooks)
         }
 
         override fun onSearchFinish(isEmpty: Boolean) {
@@ -73,18 +70,6 @@ class SearchViewModel(application: Application) : BaseViewModel(application) {
         }
     }
 
-    @Synchronized
-    private fun upAdapter() {
-        if (System.currentTimeMillis() >= postTime + 1000) {
-            handler.removeCallbacks(sendRunnable)
-            postTime = System.currentTimeMillis()
-            searchBookLiveData.postValue(searchResult)
-        } else {
-            handler.removeCallbacks(sendRunnable)
-            handler.postDelayed(sendRunnable, 1000 - System.currentTimeMillis() + postTime)
-        }
-    }
-
     /**
      * 开始搜索
      */

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

@@ -0,0 +1,30 @@
+package io.legado.app.utils
+
+import android.os.Handler
+import android.os.Looper
+import androidx.lifecycle.LiveData
+
+class DelayLiveData<T>(val delay: Int) : LiveData<T>() {
+    private val handler = Handler(Looper.getMainLooper())
+    private val sendRunnable = Runnable { sendData() }
+    private var postTime = 0L
+    private var data: T? = null
+
+    private fun sendData() {
+        data?.let {
+            super.postValue(it)
+        }
+    }
+
+    public override fun postValue(value: T) {
+        data = value
+        if (System.currentTimeMillis() >= postTime + delay) {
+            handler.removeCallbacks(sendRunnable)
+            postTime = System.currentTimeMillis()
+            super.postValue(value)
+        } else {
+            handler.removeCallbacks(sendRunnable)
+            handler.postDelayed(sendRunnable, delay - System.currentTimeMillis() + postTime)
+        }
+    }
+}