我是Android开发的新手，并试图创建签名APK，它以前工作正常，但几天后，当我尝试生成签名APK时，它显示错误消息，我已经多次搜索并检查了很多问题，但是找不到任何解决方案，下面是我点击“生成签名APK”时收到的错误消息
Magic number did not match
java.lang.IllegalStateException: Magic number did not match
at com.intellij.credentialStore.kdbx.KdbxSerializerKt.readKdbxHeader(KdbxSerializer.kt:146)
at com.intellij.credentialStore.kdbx.KdbxSerializer.createUnencryptedInputStream(KdbxSerializer.kt:61)
at com.intellij.credentialStore.kdbx.KdbxStreamFormat.load(kdbx.kt:55)
at com.intellij.credentialStore.kdbx.KdbxKt.loadKdbx(kdbx.kt:36)
at com.intellij.credentialStore.KeePassCredentialStore.<init>(KeePassCredentialStore.kt:82)
at com.intellij.credentialStore.KeePassCredentialStore.<init>(KeePassCredentialStore.kt:44)
at com.intellij.ide.passwordSafe.impl.PasswordSafeImplKt.computeProvider(PasswordSafeImpl.kt:38)
at com.intellij.ide.passwordSafe.impl.PasswordSafeImpl.<init>(PasswordSafeImpl.kt:46)
at com.intellij.ide.passwordSafe.impl.PasswordSafeImpl.<init>(PasswordSafeImpl.kt)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
at org.picocontainer.defaults.InstantiatingComponentAdapter.newInstance(InstantiatingComponentAdapter.java:193)
at com.intellij.util.pico.CachingConstructorInjectionComponentAdapter.doGetComponentInstance(CachingConstructorInjectionComponentAdapter.java:103)
at com.intellij.util.pico.CachingConstructorInjectionComponentAdapter.instantiateGuarded(CachingConstructorInjectionComponentAdapter.java:80)
at com.intellij.util.pico.CachingConstructorInjectionComponentAdapter.getComponentInstance(CachingConstructorInjectionComponentAdapter.java:63)
at com.intellij.openapi.components.impl.ServiceManagerImpl$MyComponentAdapter.getComponentInstance(ServiceManagerImpl.java:228)
at com.intellij.util.pico.DefaultPicoContainer.getLocalInstance(DefaultPicoContainer.java:239)
at com.intellij.util.pico.DefaultPicoContainer.getComponentInstance(DefaultPicoContainer.java:206)
at com.intellij.openapi.components.ServiceManager.doGetService(ServiceManager.java:48)
at com.intellij.openapi.components.ServiceManager.getService(ServiceManager.java:38)
at com.intellij.ide.passwordSafe.PasswordSafe.getInstance(PasswordSafe.java:28)
at org.jetbrains.android.exportSignedPackage.KeystoreStep.<init>(KeystoreStep.java:71)
at org.jetbrains.android.exportSignedPackage.ExportSignedPackageWizard.<init>(ExportSignedPackageWizard.java:110)
at org.jetbrains.android.actions.GenerateSignedApkAction.actionPerformed(GenerateSignedApkAction.java:74)
at com.intellij.openapi.actionSystem.ex.ActionUtil$1.run(ActionUtil.java:215)
at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:232)
at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.lambda$actionPerformed$0(ActionMenuItem.java:309)
at com.intellij.openapi.wm.impl.FocusManagerImpl.runOnOwnContext(FocusManagerImpl.java:929)
at com.intellij.openapi.wm.impl.IdeFocusManagerImpl.runOnOwnContext(IdeFocusManagerImpl.java:136)
at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.actionPerformed(ActionMenuItem.java:299)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at com.intellij.openapi.actionSystem.impl.ActionMenuItem.lambda$fireActionPerformed$0(ActionMenuItem.java:116)
at com.intellij.openapi.application.TransactionGuardImpl.runSyncTransaction(TransactionGuardImpl.java:86)
at com.intellij.openapi.application.TransactionGuardImpl.lambda$submitTransaction$1(TransactionGuardImpl.java:109)
at com.intellij.openapi.application.TransactionGuardImpl.submitTransaction(TransactionGuardImpl.java:118)
at com.intellij.openapi.application.TransactionGuard.submitTransaction(TransactionGuard.java:122)
at com.intellij.openapi.actionSystem.impl.ActionMenuItem.fireActionPerformed(ActionMenuItem.java:116)
at com.intellij.ui.plaf.beg.BegMenuItemUI.doClick(BegMenuItemUI.java:513)
at com.intellij.ui.plaf.beg.BegMenuItemUI.access$300(BegMenuItemUI.java:45)
at com.intellij.ui.plaf.beg.BegMenuItemUI$MyMouseInputHandler.mouseReleased(BegMenuItemUI.java:533)
at java.awt.Component.processMouseEvent(Component.java:6541)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6306)
at java.awt.Container.processEvent(Container.java:2237)
at java.awt.Component.dispatchEventImpl(Component.java:4897)
at java.awt.Container.dispatchEventImpl(Container.java:2295)
at java.awt.Component.dispatchEvent(Component.java:4719)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4889)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4526)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4467)
at java.awt.Container.dispatchEventImpl(Container.java:2281)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4719)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764)
at java.awt.EventQueue.access$500(EventQueue.java:98)
at java.awt.EventQueue$3.run(EventQueue.java:715)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue$4.run(EventQueue.java:737)
at java.awt.EventQueue$4.run(EventQueue.java:735)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:827)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:651)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:365)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
不完全是解决方案。但对于那些想要构建RELEASE APK的人来说是一种解决方法
我的错误原因 - 在建设过程中，计算机意外关机。
如果你想构建发布APK - 使用gradle命令行构建它。它有效（现在）
（Qazxswpoi）
可能KeePass数据库已损坏或其他。找到该文件（在Windows上它通常是
“C：\用户\ admin.AndroidStudio3.2 \配置\ c.kdbx”
（适用于Windows 10上的2018.1版本）;其他 - 请参阅IDE用于存储设置，缓存，插件和日志的目录
删除“c.kdbx”文件
备份它（以防万一）删除它（当IDE关闭时）
启动IDE，看看它是否能解决问题。