React Native 错误：RNHTMLtoPDF 错误：无法创建文件夹结构

Question

开发环境

System:
    OS: macOS 10.15.4
    CPU: (8) x64 Intel(R) Core(TM) i7-4770HQ CPU @ 2.20GHz
    Memory: 248.71 MB / 16.00 GB
    Shell: 3.2.57 - /bin/bash
  Binaries:
    Node: 13.2.0 - /usr/local/bin/node
    Yarn: 1.22.4 - /usr/local/bin/yarn
    npm: 6.13.4 - /usr/local/bin/npm
    Watchman: 4.9.0 - /usr/local/bin/watchman
  Managers:
    CocoaPods: 1.9.3 - /usr/local/bin/pod
  SDKs:
    iOS SDK:
      Platforms: iOS 13.4, DriverKit 19.0, macOS 10.15, tvOS 13.4, watchOS 6.2
    Android SDK: Not Found
  IDEs:
    Android Studio: 3.5 AI-191.8026.42.35.5900203
    Xcode: 11.4.1/11E503a - /usr/bin/xcodebuild
  Languages:
    Java: 13.0.1 - /usr/bin/javac
    Python: 2.7.16 - /usr/bin/python
  npmPackages:
    @react-native-community/cli: Not Found
    react: 16.13.1 => 16.13.1 
    react-native: 0.62.2 => 0.62.2 
  npmGlobalPackages:
    *react-native*: Not Found

我无法在 ANDROID API LEVEL 29 中制作 PDF。它在 API LEVEL 28 中工作正常。因此，我 根据此问题将 RN 版本0.63.2从0.62.2和 Gradle降级3.5.3为https://github.com/christopherdro/react-native- html-to-pdf/问题/1893.5.2

也遵循了https://github.com/christopherdro/react-native-html-to-pdf/issues/149 。它说权限错误，所以在里面componentDidMount()我添加了以下行

PermissionsAndroid.request(PermissionsAndroid.PERMISSIONS.WRITE_EXTERNAL_STORAGE)

但仍然没有运气。我收到以下错误。

Possible Unhandled Promise Rejection (id: 0):
Error: RNHTMLtoPDF error: Could not create folder structure.
promiseMethodWrapper@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:2214:45
createPDF$@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:136885:88
tryCatch@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26640:23
invoke@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26813:32
tryCatch@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26640:23
invoke@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26713:30
http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26743:19
tryCallTwo@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:28610:9
doResolve@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:28774:25
Promise@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:28633:14
callInvokeWithMethodAndArg@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26742:33
enqueue@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26747:157
async@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26764:69
createPDF@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:136851:42
requestReadPermission$@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:136835:33
tryCatch@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26640:23
invoke@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26813:32
tryCatch@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26640:23
invoke@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26713:30
http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:26723:21
tryCallOne@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:28601:16
http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:28702:27
_callTimer@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:32141:17
_callImmediatesPass@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:32177:19
callImmediates@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:32395:33
callImmediates@[native code]
__callImmediates@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:2719:35
http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:2505:34
__guard@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:2702:15
flushedQueue@http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false:2504:21
flushedQueue@[native code]
invokeCallbackAndReturnFlushedQueue@[native code]

这是我正在使用的库https://github.com/christopherdro/react-native-html-to-pdf

Answer 1

我从他的链接找到了解决方案

如果您发现您的应用程序无法创建任何文件或文件夹，您应该添加

android:requestLegacyExternalStorage="true" in your `<application>` in `AndroidManifest.xml`

了解更多详情官方链接和其他 StackOverflow 问题解答

请记住：我使用的是 React Native，并且仅在 Android API 29 及更高版本中我陷入了这个问题。