File.delete() function works only first time then throws f noilet found for other images

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英文:

File.delete() function works only first time then throws f noilet found for other images

问题

我将所有文件的 URI 存储在一个列表中，这些文件位于目录中：

  1. "/storage/emulated/0/Android/data/com.pratiksahu.dokify/"

以下是用于删除文件的函数：

  1. fun setupDeleteImageButtonListener() {
  2.     deleteFileButton.setOnClickListener {
  3.         if(selectedItemsImage.size > 0)
  4.         selectedItemsImage.forEach {
  5.             File("/storage/emulated/0/Android/data/com.pratiksahu.dokify/", it.path).delete()
  6.                 .let { result ->
  7.                     Log.d(TAG_DELETE, it.path + " <-- $result")
  8.                 }
  9.         }
  10.         selectedItemsImage.clear() //使用此操作存储图像 URI
  11.         selectedItems.clear() //使用此操作存储在带有复选框的 RecyclerView 中使用的索引
  12.         importedImagesAdapter?.setSelectedItems(selectedItems) //更新复选框选择的项目
  13.         imageList.clear() //清除从应用程序启动时扫描目录中检索的列表
  14.         imagePagerViewModel.initImages() //刷新可用文件列表（包含 URI）
  15.         importedImagesAdapter?.items = imageList //将新列表设置到适配器中
  16.     }
  17. }

我能够在第一批中删除文件，但是如果我尝试在第二批中删除文件，File.delete() 将无法找到文件，尽管该文件位于目录中。

英文:

I am storing uri for all files in a list which are in
Directory

  1. &quot;/storage/emulated/0/Android/data/com.pratiksahu.dokify/&quot;

This is the function which is used to delete files

  1. fun setupDeleteImageButtonListener() {
  2.         deleteFileButton.setOnClickListener {
  3.             if(selectedItemsImage.size&gt;0)
  4.             selectedItemsImage.forEach {
  5.                 File(&quot;/storage/emulated/0/Android/data/com.pratiksahu.dokify/&quot;, it.path).delete()
  6.                     .let { result -&gt;
  7.                         Log.d(TAG_DELETE, it.path + &quot; &lt;-- $result&quot;)
  8.                     }
  9.             }
  10.             selectedItemsImage.clear() //using this to store image uri
  11.             selectedItems.clear() //using this to store index which is being used in recyclerview with checkbox
  12.             importedImagesAdapter?.setSelectedItems(selectedItems) //updating checkbox selected items
  13.             imageList.clear() //Clearing list which is retrieved from scanning the directory when app starts
  14.             imagePagerViewModel.initImages() // Refreshing available files list (Contains uri)
  15.             importedImagesAdapter?.items = imageList //Setting new list to adapter
  16.         }
  17.     }

I am able to delete files in first batch , but if I try to delete files in second batch , File.delete() is not able to find the file though it is present in directory

File.delete() function works only first time then throws f noilet found for other images

答案1

得分: 0

发现错误，我在扫描目录并存储带有完整路径的URI。

  1. fun initImages() {
  2.         _loading.value = true
  3.         val path = "/storage/emulated/0/Android/data/com.pratiksahu.dokify/files/Pictures"
  4.         val directory = File(path)
  5.         if (directory.exists()) {
  6.             val files: Array<File> = directory.listFiles()
  7.             if (files.size > 0) {
  8.                 Arrays.sort(files, Comparator.comparingLong(File::lastModified).reversed())
  9.                 val tempDocInfoList = ArrayList<DocInfo>()
  10.                 for (i in files.indices) {
  11.                     val tempDocInfo = DocInfo(files[i].toUri(), files[i].name, files[i].length().toString())
  12.                     tempDocInfoList.add(tempDocInfo)
  13.                 }
  14.                 setImage(tempDocInfoList)
  15.             }
  16.         }
  17.         _loading.value = false
  18.     }

不同于其他情况，如果我尝试从图库或相机导入，其中就不会有完整的路径。所以我代码中唯一需要更改的地方是：

  1. File("/storage/emulated/0/Android/data/com.pratiksahu.dokify/", it.path)
  3. 改为
  5. File(it.path)
英文:

Found the error , I was scanning the directory and storing the uri which had the full path in it

  1. fun initImages() {
  2.         _loading.value = true
  3.         val path  = &quot;/storage/emulated/0/Android/data/com.pratiksahu.dokify/files/Pictures&quot;
  4.         val directory = File(path)
  5.         if (directory.exists())
  6.         {
  7.             val files: Array&lt;File&gt; = directory.listFiles()
  8.             if (files.size &gt; 0) {
  9.                 Arrays.sort(files, Comparator.comparingLong(File::lastModified).reversed())
  10.                 val tempDocInfoList = ArrayList&lt;DocInfo&gt;()
  11.                 for (i in files.indices) {
  12.                     val tempDocInfo = DocInfo(files[i].toUri() , files[i].name , files[i].length().toString())
  13.                     tempDocInfoList.add(tempDocInfo)
  14.                 }
  15.                 setImage(tempDocInfoList)
  16.             }
  17.         }
  18.         _loading.value = false
  19.     }

Unlike in other scenarios where If I try to import from gallery or camera it won't have full path in it.
So all I had to change in my code was

  1. File(&quot;/storage/emulated/0/Android/data/com.pratiksahu.dokify/&quot;, it.path)
  3. into 
  5. File(it.path)

huangapple
  • 本文由 发表于 2020年9月27日 01:28:36
  • 转载请务必保留本文链接：https://go.coder-hub.com/64080644.html
  • android
  • java
  • kotlin
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