优化

app/src/main/java/io/legado/app/help/config/LocalConfig.kt

@@ -7,19 +7,25 @@ import io.legado.app.utils.getBoolean
 import io.legado.app.utils.putBoolean
 import io.legado.app.utils.putLong
 import io.legado.app.utils.putString
+import io.legado.app.utils.remove
 import splitties.init.appCtx
 
-object LocalConfig :
+object LocalConfig : SharedPreferences
-    SharedPreferences by appCtx.getSharedPreferences("local", Context.MODE_PRIVATE) {
+by appCtx.getSharedPreferences("local", Context.MODE_PRIVATE) {
+
     private const val versionCodeKey = "appVersionCode"
 
     /**
      * 本地密码,用来对需要备份的敏感信息加密,如 webdav 配置等
      */
-    var password: String
+    var password: String?
-        get() = getString("password", "") ?: ""
+        get() = getString("password", null)
         set(value) {
-            putString("password", value)
+            if (value != null) {
+                putString("password", value)
+            } else {
+                remove("password")
+            }
         }
 
     var lastBackup: Long

app/src/main/java/io/legado/app/ui/main/MainActivity.kt

@@ -19,7 +19,6 @@ import com.google.android.material.bottomnavigation.BottomNavigationView
 import io.legado.app.BuildConfig
 import io.legado.app.R
 import io.legado.app.base.VMBaseActivity
-import io.legado.app.constant.AppConst
 import io.legado.app.constant.AppConst.appInfo
 import io.legado.app.constant.EventBus
 import io.legado.app.constant.PreferKey
@@ -212,7 +211,7 @@ class MainActivity : VMBaseActivity<ActivityMainBinding, MainViewModel>(),
      * 设置本地密码
      */
     private suspend fun setLocalPassword() = suspendCoroutine { block ->
-        if (LocalConfig.password.isNotBlank()) {
+        if (LocalConfig.password != null) {
             block.resume(null)
             return@suspendCoroutine
         }
@@ -230,7 +229,7 @@ class MainActivity : VMBaseActivity<ActivityMainBinding, MainViewModel>(),
                 LocalConfig.password = editTextBinding.editView.text.toString()
             }
             cancelButton {
-                LocalConfig.password = AppConst.androidId
+                LocalConfig.password = ""
             }
         }
     }

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

@@ -95,3 +95,9 @@ fun SharedPreferences.putFloat(key: String, value: Float) {
         putFloat(key, value)
     }
 }
+
+fun SharedPreferences.remove(key: String) {
+    edit {
+        remove(key)
+    }
+}