优化

app/src/main/java/io/legado/app/constant/PreferKey.kt

@@ -123,6 +123,7 @@ object PreferKey {
     const val audioPlayWakeLock = "audioPlayWakeLock"
     const val readAloudWakeLock = "readAloudWakeLock"
     const val showLastUpdateTime = "showLastUpdateTime"
+    const val clearWebViewData = "clearWebViewData"
 
     const val cPrimary = "colorPrimary"
     const val cAccent = "colorAccent"

app/src/main/java/io/legado/app/ui/config/ConfigViewModel.kt

@@ -1,6 +1,7 @@
 package io.legado.app.ui.config
 
 import android.app.Application
+import android.content.Context
 import io.legado.app.R
 import io.legado.app.base.BaseViewModel
 import io.legado.app.help.AppWebDav
@@ -25,5 +26,13 @@ class ConfigViewModel(application: Application) : BaseViewModel(application) {
         }
     }
 
+    fun clearWebViewData() {
+        execute {
+            FileUtils.delete(context.getDir("webview", Context.MODE_PRIVATE))
+        }.onSuccess {
+            context.toastOnUi(R.string.success)
+        }
+    }
 
-}
+
+}

app/src/main/java/io/legado/app/ui/config/OtherConfigFragment.kt

@@ -2,6 +2,7 @@ package io.legado.app.ui.config
 
 import android.annotation.SuppressLint
 import android.content.ComponentName
+import android.content.Context
 import android.content.SharedPreferences
 import android.content.pm.PackageManager
 import android.os.Bundle
@@ -131,6 +132,7 @@ class OtherConfigFragment : PreferenceFragment(),
                         AppConfig.sourceEditMaxLine = it
                     }
             }
+            PreferKey.clearWebViewData -> clearWebViewData()
         }
         return super.onPreferenceTreeClick(preference)
     }
@@ -230,6 +232,15 @@ class OtherConfigFragment : PreferenceFragment(),
         }
     }
 
+    private fun clearWebViewData() {
+        alert(R.string.clear_webview_data, R.string.sure_del) {
+            okButton {
+                viewModel.clearWebViewData()
+            }
+            noButton()
+        }
+    }
+
     private fun isProcessTextEnabled(): Boolean {
         return packageManager.getComponentEnabledSetting(componentName) != PackageManager.COMPONENT_ENABLED_STATE_DISABLED
     }