优化webViewActivity

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

@@ -4,11 +4,13 @@ import android.annotation.SuppressLint
 import android.content.pm.ActivityInfo
 import android.net.Uri
 import android.os.Bundle
+import android.view.KeyEvent
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
 import android.webkit.*
 import androidx.activity.viewModels
+import androidx.core.view.size
 import androidx.webkit.WebSettingsCompat
 import androidx.webkit.WebViewFeature
 import io.legado.app.R
@@ -131,6 +133,38 @@ class WebViewActivity : VMBaseActivity<ActivityWebViewBinding, WebViewModel>() {
         }
     }
 
+    override fun onKeyLongPress(keyCode: Int, event: KeyEvent?): Boolean {
+        when (keyCode) {
+            KeyEvent.KEYCODE_BACK -> {
+                finish()
+                return true
+            }
+        }
+        return super.onKeyLongPress(keyCode, event)
+    }
+
+    override fun onKeyUp(keyCode: Int, event: KeyEvent?): Boolean {
+        event?.let {
+            when (keyCode) {
+                KeyEvent.KEYCODE_BACK -> if (event.isTracking && !event.isCanceled && binding.webView.canGoBack()) {
+                    if (binding.customWebView.size > 0) {
+                        customWebViewCallback?.onCustomViewHidden()
+                        return true
+                    } else if (binding.webView.copyBackForwardList().size > 1) {
+                        binding.webView.goBack()
+                        return true
+                    }
+                }
+            }
+        }
+        return super.onKeyUp(keyCode, event)
+    }
+
+    override fun onDestroy() {
+        super.onDestroy()
+        binding.webView.destroy()
+    }
+
     inner class CustomWebChromeClient : WebChromeClient() {
 
         override fun onReceivedTitle(view: WebView?, title: String?) {