...

app/src/main/java/com/base/browserwhite/ui/fragment/HomeFragment.kt

@@ -9,6 +9,7 @@ import android.widget.TextView
 import android.widget.Toast
 import androidx.appcompat.app.AppCompatActivity
 import androidx.core.view.isVisible
+import androidx.recyclerview.widget.LinearLayoutManager
 import com.base.browserwhite.R
 import com.base.browserwhite.bean.ConstObject
 import com.base.browserwhite.bean.ConstObject.BAIDU
@@ -24,6 +25,7 @@ import com.base.browserwhite.bean.defaultValue
 import com.base.browserwhite.bean.webSiteGroupBeanList
 import com.base.browserwhite.databinding.FragmentHomeBinding
 import com.base.browserwhite.fcm.NotificationUtil
+import com.base.browserwhite.help.NewsUtils.requestNews
 import com.base.browserwhite.service.StayNotificationService.Companion.restartStartStayNotification
 import com.base.browserwhite.ui.activity.cleanjunk.ScanJunkActivity
 import com.base.browserwhite.ui.activity.news.NewsActivity
@@ -35,9 +37,8 @@ import com.base.browserwhite.ui.adapter.HeaderAdapter
 import com.base.browserwhite.ui.adapter.NewsAdapter
 import com.base.browserwhite.ui.views.DialogViews.showSearchEngineDialog
 import com.base.browserwhite.utils.AppPreferences
-import com.base.browserwhite.utils.LogEx
-import com.base.browserwhite.help.NewsUtils.requestNews
 import com.base.browserwhite.utils.LinkMatchUtils
+import com.base.browserwhite.utils.LogEx
 import com.chad.library.adapter4.QuickAdapterHelper
 import com.chad.library.adapter4.loadState.LoadState
 import com.chad.library.adapter4.loadState.trailing.TrailingLoadStateAdapter
@@ -112,9 +113,18 @@ class HomeFragment : BaseFragment<FragmentHomeBinding>() {
         binding.rv.adapter = helper.adapter
         binding.rv.setOnScrollChangeListener { v, scrollX, scrollY, oldScrollX, oldScrollY ->
             LogEx.logDebug(TAG, "scrollY=$scrollY oldScrollY=$oldScrollY")
-            if (!binding.ivUp.isVisible && abs(oldScrollY) > 35) {
+
+            // 检查当前滚动位置
+            val firstVisibleItem: Int = (binding.rv.layoutManager as LinearLayoutManager).findFirstVisibleItemPosition()
+
+            if (firstVisibleItem > 3) {
                 binding.ivUp.isVisible = true
             }
+
+            if (firstVisibleItem == 0) {
+                binding.ivUp.isVisible = false
+            }
+
         }
         requestMore()
     }