Cordova:如何将文件移动到下载文件夹? [英] Cordova: How to move file to the Download folder?

查看：80
本文介绍了Cordova:如何将文件移动到下载文件夹?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

情况:

在我的移动应用中，我需要下载一个文件并将其存储在下载文件夹中.

下载部分工作正常.该文件已从服务器正确下载并存储在以下文件夹中:

file:///storage/emulated/0/Android/data/org.cordova.MY_APP_NAME.app/my_file.pdf

但该位置对用户并不友好.

要访问它，我必须转到:内部存储/Android/数据/org.cordova.MY_APP_NAME.app/

所以我需要将它移动到主下载文件夹.

文件传输是我无法做到的.

我知道已经有几个关于 SO 的类似问题.

我已经尝试了所有这些，但没有一个对我有用，我永远无法在实际的下载文件夹中看到该文件.

项目信息:

我正在使用 Quasar 和 Vuejs 和 Cordova.

平台:

目前我正在使用 Android.但理想情况下，我正在寻找适用于 Android 和 IOS 的解决方案.

代码:

下载代码:

var fileTransfer = new FileTransfer()//eslint-disable-linevar uri = encodeURI('https://MY_SERVER_PATH')文件传输.下载(尿，cordova.file.externalApplicationStorageDirectory + 'my_file.pdf',条目 =>{console.log('下载完成:' + entry.toURL())this.moveFile(entry.toURL())},错误 =>{console.log('下载错误源' + error.source)console.log('下载错误目标' + error.target)console.log('下载错误代码' + error.code)},错误的，{标题:{'授权':'基本asdasdasdasdassdasdasd'}})

文件传输代码:

moveFile(fileUri) {window.resolveLocalFileSystemURL(文件Uri，文件条目 =>{让 newFileUri = 'file:///storage/emulated/0/Download'window.resolveLocalFileSystemURL(新文件Uri，dirEntry =>{fileEntry.moveTo(dirEntry, 'new_filename.pdf', this.moveFileSuccess, this.moveFileError)},this.moveFileError)},this.moveFileError)},移动文件成功(条目){console.log('文件移动成功')控制台日志(条目)},移动文件错误(错误){console.log('文件移动错误')控制台日志(错误)}

问题:

如何将文件移动到下载文件夹?

谢谢

这是 cordova.file 对象的控制台日志:

applicationDirectory: "file:///android_asset/"applicationStorageDirectory: "file:///data/user/0/org.cordova.MY_APP_NAME.app/"cacheDirectory:"file:///data/user/0/org.cordova.MY_APP_NAME.app/cache/"数据目录:file:///data/user/0/org.cordova.MY_APP_NAME.app/files/"文件目录:nullexternalApplicationStorageDirectory: "file:///storage/emulated/0/Android/data/org.cordova.MY_APP_NAME.app/"externalCacheDirectory: "file:///storage/emulated/0/Android/data/org.cordova.MY_APP_NAME.app/cache/"externalDataDirectory: "file:///storage/emulated/0/Android/data/org.cordova.MY_APP_NAME.app/files/"externalRootDirectory: "file:///storage/emulated/0/"共享目录:空同步数据目录:空临时目录:空

解决方案

好的，我设法解决了.

  • 首先完全没有必要下载然后移动文件.它可以直接在所需的方向下载.

  • 正确的路径(就我而言)是这样的:

    cordova.file.externalRootDirectory + 'download/' + 'my_file.pdf

    对应于:file:///storage/emulated/0/download/my_file.pdf

    这意味着要在设备内部找到文件，您必须转到:内部存储/下载/my_file.pdf

  • 在 config.xml 中添加以下值:

    <preference name="AndroidExtraFilesystems" value="files,files-external,documents,sdcard,root"/>

  • 使用此cordova插件检查权限很重要:cordova-plugin-安卓权限

您可以像这样进行快速测试:

let permissions = cordova.plugins.permissions权限.检查权限(权限.READ_EXTERNAL_STORAGE，checkPermissionCallback，空)功能检查权限回调(状态){console.log('检查权限')控制台日志(状态)}

结果很可能是false.这意味着我们必须向用户请求权限:

permissions.requestPermission(successCallback, errorCallback, permission)

这样就会出现请求权限的提示.

代码:

总之，这是工作代码:

let pdfPath = 'https://MY_SERVER_PATH'让权限=cordova.plugins.permissions权限.检查权限(权限.READ_EXTERNAL_STORAGE，checkPermissionCallback，空)//检查权限功能检查权限回调(状态){console.log('检查权限')控制台日志(状态)如果(！status.hasPermission){var errorCallback = 函数 () {console.warn('存储权限未开启')}//向用户请求权限permission.requestPermission(权限.READ_EXTERNAL_STORAGE，功能(状态){如果(！status.hasPermission){错误回调()} 别的 {//继续下载下载文件()}},错误回调)} 别的 {下载文件()}}函数下载文件(){让 filePath = cordova.file.externalRootDirectory + 'download/' + 'my_file.pdf'让 fileTransfer = new window.FileTransfer()让 uri = encodeURI(decodeURIComponent(pdfPath))//下载文件fileTransfer.download(uri, filePath,功能(入口){console.log('文件下载成功，完整路径为' + entry.fullPath)控制台日志(条目)},功能(错误){console.log('错误')控制台日志(错误)},错误的)}

THE SITUATION:

In my mobile app I need to download a file and store in the Download folder.

The download part is working fine. The file is properly downloaded from the server and stored in the following folder:

file:///storage/emulated/0/Android/data/org.cordova.MY_APP_NAME.app/my_file.pdf

But the location is not really user-friendly.

To access it I have to go to: Internal storage / Android / data / org.cordova.MY_APP_NAME.app /

So I need to move it to the main Download folder.

The file transfer is what I don't manage to do.

I know that there are already several similar questions on SO.

I have tried them all but none really worked for me, I could never see the file in the actual Download folder.

PROJECT INFO:

I am using Quasar with Vuejs and Cordova.

PLATFORM:

For the moment I am working with Android. But ideally I am looking for a solution that works for both Android and IOS.

THE CODE:

The download code:

var fileTransfer = new FileTransfer() // eslint-disable-line
var uri = encodeURI('https://MY_SERVER_PATH')

fileTransfer.download(
  uri,
  cordova.file.externalApplicationStorageDirectory + 'my_file.pdf',
  entry => {
    console.log('download complete: ' + entry.toURL())
    this.moveFile(entry.toURL())
  },
  error => {
    console.log('download error source ' + error.source)
    console.log('download error target ' + error.target)
    console.log('download error code' + error.code)
  },
  false,
  {
    headers: {
      'Authorization': 'Basic asdasdasdasdassdasdasd'
    }
  }
)

The File transfer code:

moveFile(fileUri) {
  window.resolveLocalFileSystemURL(
    fileUri,
    fileEntry => {
      let newFileUri = 'file:///storage/emulated/0/Download'

      window.resolveLocalFileSystemURL(
        newFileUri,
        dirEntry => {
          fileEntry.moveTo(dirEntry, 'new_filename.pdf', this.moveFileSuccess, this.moveFileError)
        },
        this.moveFileError)
    },
    this.moveFileError)
},
moveFileSuccess(entry) {
  console.log('file move success')
  console.log(entry)
},
moveFileError(error) {
  console.log('file move error')
  console.log(error)
}

THE QUESTION:

How can I move a file to the Download folder?

Thanks

EDIT:

This is the console log of the cordova.file object:

applicationDirectory: "file:///android_asset/"
applicationStorageDirectory: "file:///data/user/0/org.cordova.MY_APP_NAME.app/"
cacheDirectory:"file:///data/user/0/org.cordova.MY_APP_NAME.app/cache/"
dataDirectory: "file:///data/user/0/org.cordova.MY_APP_NAME.app/files/"
documentsDirectory: null
externalApplicationStorageDirectory: "file:///storage/emulated/0/Android/data/org.cordova.MY_APP_NAME.app/"
externalCacheDirectory: "file:///storage/emulated/0/Android/data/org.cordova.MY_APP_NAME.app/cache/"
externalDataDirectory: "file:///storage/emulated/0/Android/data/org.cordova.MY_APP_NAME.app/files/"
externalRootDirectory: "file:///storage/emulated/0/"
sharedDirectory: null
syncedDataDirectory: null
tempDirectory: null

解决方案

Okay I managed to resolve it.

  • First of all is totally unnecessary to download and then move the file. It can just be directly downloaded in the desired direction.

  • The correct path (in my case) was this:

    cordova.file.externalRootDirectory + 'download/' + 'my_file.pdf

    that correspond to: file:///storage/emulated/0/download/my_file.pdf

    and that means that to find the file inside the device you have to go to: Internal Storage / Download / my_file.pdf

  • Add the following value in the config.xml:

    <preference name="AndroidPersistentFileLocation" value="Compatibility" /> <preference name="AndroidExtraFilesystems" value="files,files-external,documents,sdcard,root" />

  • It's important to check for permission using this cordova plugin: cordova-plugin-android-permissions

You can make a quick test like this:

let permissions = cordova.plugins.permissions
permissions.checkPermission(permissions.READ_EXTERNAL_STORAGE, checkPermissionCallback, null)

function checkPermissionCallback(status) {
  console.log('checking permissions')
  console.log(status)
}

Most probably the result is false. And that means that we have to request permission to the user:

permissions.requestPermission(successCallback, errorCallback, permission)

In this way it will appear the alert asking for permission.

THE CODE:

To put it all together, this is the working code:

let pdfPath = 'https://MY_SERVER_PATH'

let permissions = cordova.plugins.permissions
permissions.checkPermission(permissions.READ_EXTERNAL_STORAGE, checkPermissionCallback, null)

// Checking for permissions
function checkPermissionCallback(status) {
  console.log('checking permissions')
  console.log(status)
  if (!status.hasPermission) {
    var errorCallback = function () {
      console.warn('Storage permission is not turned on')
    }
    // Asking permission to the user
    permissions.requestPermission(
      permissions.READ_EXTERNAL_STORAGE,
      function (status) {
        if (!status.hasPermission) {
          errorCallback()
        } else {
          // proceed with downloading
          downloadFile()
        }
      },
      errorCallback)
  } else {
    downloadFile()
  }
}

function downloadFile() {
  let filePath = cordova.file.externalRootDirectory + 'download/' + 'my_file.pdf'
  let fileTransfer = new window.FileTransfer()
  let uri = encodeURI(decodeURIComponent(pdfPath))

  // Downloading the file
  fileTransfer.download(uri, filePath,
    function (entry) {
      console.log('Successfully downloaded file, full path is ' + entry.fullPath)
      console.log(entry)
    },
    function (error) {
      console.log('error')
      console.log(error)
    },
    false
  )
}

这篇关于Cordova:如何将文件移动到下载文件夹?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

查看全文
相关文章
移动开发最新文章
热门教程
热门工具
登录 关闭
扫码关注1秒登录
发送“验证码”获取 | 15天全站免登陆