优化

app/src/main/java/io/legado/app/ui/browser/WebViewActivity.kt

@@ -43,6 +43,7 @@ import io.legado.app.utils.openUrl
 import io.legado.app.utils.sendToClip
 import io.legado.app.utils.setDarkeningAllowed
 import io.legado.app.utils.startActivity
+import io.legado.app.utils.toggleNavigationBar
 import io.legado.app.utils.viewbindingdelegate.viewBinding
 import io.legado.app.utils.visible
 import java.net.URLDecoder
@@ -239,6 +240,7 @@ class WebViewActivity : VMBaseActivity<ActivityWebViewBinding, WebViewModel>() {
             binding.customWebView.addView(view)
             customWebViewCallback = callback
             keepScreenOn(true)
+            toggleNavigationBar(false)
         }
 
         override fun onHideCustomView() {
@@ -246,6 +248,7 @@ class WebViewActivity : VMBaseActivity<ActivityWebViewBinding, WebViewModel>() {
             binding.llView.visible()
             requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED
             keepScreenOn(false)
+            toggleNavigationBar(true)
         }
     }
 

app/src/main/java/io/legado/app/ui/rss/read/ReadRssActivity.kt

@@ -60,6 +60,7 @@ import io.legado.app.utils.splitNotBlank
 import io.legado.app.utils.startActivity
 import io.legado.app.utils.textArray
 import io.legado.app.utils.toastOnUi
+import io.legado.app.utils.toggleNavigationBar
 import io.legado.app.utils.viewbindingdelegate.viewBinding
 import io.legado.app.utils.visible
 import kotlinx.coroutines.launch
@@ -380,6 +381,7 @@ class ReadRssActivity : VMBaseActivity<ActivityRssReadBinding, ReadRssViewModel>
             binding.customWebView.addView(view)
             customWebViewCallback = callback
             keepScreenOn(true)
+            toggleNavigationBar(false)
         }
 
         override fun onHideCustomView() {
@@ -387,6 +389,7 @@ class ReadRssActivity : VMBaseActivity<ActivityRssReadBinding, ReadRssViewModel>
             binding.llView.visible()
             requestedOrientation = ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED
             keepScreenOn(false)
+            toggleNavigationBar(true)
         }
     }
 

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

@@ -16,6 +16,10 @@ import android.view.WindowMetrics
 import android.widget.FrameLayout
 import androidx.annotation.ColorInt
 import androidx.appcompat.app.AppCompatActivity
+import androidx.core.view.WindowCompat
+import androidx.core.view.WindowInsetsCompat
+import androidx.core.view.WindowInsetsControllerCompat.BEHAVIOR_DEFAULT
+import androidx.core.view.WindowInsetsControllerCompat.BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
 import androidx.fragment.app.DialogFragment
 import io.legado.app.R
 import io.legado.app.ui.widget.dialog.TextDialog
@@ -173,6 +177,18 @@ fun Activity.keepScreenOn(on: Boolean) {
     }
 }
 
+fun Activity.toggleNavigationBar(show: Boolean) {
+    WindowCompat.getInsetsController(window, window.decorView).run {
+        if (show) {
+            show(WindowInsetsCompat.Type.navigationBars())
+            systemBarsBehavior = BEHAVIOR_DEFAULT
+        } else {
+            hide(WindowInsetsCompat.Type.navigationBars())
+            systemBarsBehavior = BEHAVIOR_SHOW_TRANSIENT_BARS_BY_SWIPE
+        }
+    }
+}
+
 /////以下方法需要在View完全被绘制出来之后调用，否则判断不了,在比如 onWindowFocusChanged（）方法中可以得到正确的结果/////
 
 /**