blocks|key|2864325|text|我认为下面的代码应该可以工作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2864326|window.requestFileSystem(LocalFileSystem.PERSISTENT,+0,+onRequestFileSystem,+fail);

function+onRequestFileSystem(fileSystem)+{
++++var+directoryReader+=+fileSystem.root.createReader();
++++directoryReader.readEntries(onReadEntries,+fail);
}

function+onReadEntries(entries)+{
++++var+i;
++++for+(i+=+0;+i+<+entries.length;+i%2B%2B)+{
+++++++if+(entries[i].isFile+==+true)+{
+++++++++//+...
+++++++}
+++++++if+(entries[i].isDirectory+==+true)+{
+++++++++var+directoryReader+=+entries[i].fullPath.createReader();
+++++++++directoryReader.readEntries(onReadEntries,+fail);
+++++++}
++++}
}|code-block|syntax|javascript|2864327|http://www.c-sharpcorner.com/UploadFile/e83792/filesystem-directoryentry-objects-in-phonegap/|offset|length|2864328|entityMap|0|LINK|mutability|MUTABLE|url^0|0|0|0|2L|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|S|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|T|8|@]|9|@$I|U|J|V|1|W]]|A|$]]|$1|K|3|-4|5|6|7|X|8|@]|9|@]|A|$]]]|L|$M|$5|N|O|P|A|$Q|H]]]]

I think the following code should work:

<pre><code>window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, onRequestFileSystem, fail);

function onRequestFileSystem(fileSystem) {
 var directoryReader = fileSystem.root.createReader();
 directoryReader.readEntries(onReadEntries, fail);
}

function onReadEntries(entries) {
 var i;
 for (i = 0; i &lt; entries.length; i++) {
 if (entries[i].isFile == true) {
 // ...
 }
 if (entries[i].isDirectory == true) {
 var directoryReader = entries[i].fullPath.createReader();
 directoryReader.readEntries(onReadEntries, fail);
 }
 }
}
</code></pre>

<a href="http://www.c-sharpcorner.com/UploadFile/e83792/filesystem-directoryentry-objects-in-phonegap/" rel="nofollow">http://www.c-sharpcorner.com/UploadFile/e83792/filesystem-directoryentry-objects-in-phonegap/</a>

blocks|key|3349490|text|scan+:+function(url,fileType,callback)
++++++++{
+++++++++++++var+fileTypeCollection+=+[];
+++++++++++++var+defer+=+$q.defer();


++++++++++++++++url.forEach(function(element,+index)+
++++++++++++++++{
++++++++++++++++//requestLocalFileSystemURL
++++++++++++++++log(element);
++++++++++++++++window.resolveLocalFileSystemURL(element,onRequestFileSystem,+fail);


++++++++++++++++log("Ends+resolve");
++++++++++++++++});


++++++++++++function+onRequestFileSystem(fileSystem)+
++++++++++++{
++++++++++++++++var+directoryReader+=+fileSystem.createReader();
++++++++++++++++directoryReader.readEntries(onReadEntries,fail);
++++++++++++}+/*onRequestFile+Ends*/

++++++++++++function+onReadEntries(entries)+
++++++++++++{


++++++++++++++++if(entries.length==0)
++++++++++++++++{
+++++++++++++++++++++log("Entries+Length....Resolving");
+++++++++++++++++++++defer.resolve(fileTypeCollection);
++++++++++++++++}
++++++++++++++++else
++++++++++++++++{+++
++++++++++++++++++++entries.forEach(+function(element,+index)+
++++++++++++++++++++{

++++++++++++++++++++++++if+(element.isDirectory+===+true)+
++++++++++++++++++++++++{
++++++++++++++++++++++++//+Recursive+--+call+back+into+this+subdirectory

+++++++++++++++++++++++++onRequestFileSystem(element);
++++++++++++++++++++++++}+

++++++++++++++++++++++++if(element.isFile+==+true)+
++++++++++++++++++++++++{

++++++++++++++++++++++++++++++++fileType.forEach(function(type)
++++++++++++++++++++++++++++++++{
++++++++++++++++++++++++++++++++++++if(element.name.indexOf(type)+!=+-1)
++++++++++++++++++++++++++++++++++++{
++++++++++++++++++++++++++++++++++++++++fileTypeCollection.push(element);
++++++++++++++++++++++++++++++++++++}
++++++++++++++++++++++++++++++++});+
++++++++++++++++++++++++}+/*is+File+ENds*/
++++++++++++++++++++});++/*Entries+For+Each+Ends*/
++++++++++++++++}+++

++++++++++++}++/*OnRead+Ends*/

++++++++++++function+fail(resp)
++++++++++++{
++++++++++++++++log(resp);
++++++++++++++++defer.reject();
++++++++++++}++/*Fail+Ends*/

++++++++return+defer.promise;

++++}++//Scan+Function+Ends|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|3349491|尝尝这个。如果你愿意，可以删除这些承诺，并且使用callback.promises是一种破坏。如果你能修复，那就没问题了，否则在推送FileType后使用回调|unstyled|3349492|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>scan : function(url,fileType,callback)
 {
 var fileTypeCollection = [];
 var defer = $q.defer();


 url.forEach(function(element, index) 
 {
 //requestLocalFileSystemURL
 log(element);
 window.resolveLocalFileSystemURL(element,onRequestFileSystem, fail);


 log("Ends resolve");
 });


 function onRequestFileSystem(fileSystem) 
 {
 var directoryReader = fileSystem.createReader();
 directoryReader.readEntries(onReadEntries,fail);
 } /*onRequestFile Ends*/

 function onReadEntries(entries) 
 {


 if(entries.length==0)
 {
 log("Entries Length....Resolving");
 defer.resolve(fileTypeCollection);
 }
 else
 { 
 entries.forEach( function(element, index) 
 {

 if (element.isDirectory === true) 
 {
 // Recursive -- call back into this subdirectory

 onRequestFileSystem(element);
 } 

 if(element.isFile == true) 
 {

 fileType.forEach(function(type)
 {
 if(element.name.indexOf(type) != -1)
 {
 fileTypeCollection.push(element);
 }
 }); 
 } /*is File ENds*/
 }); /*Entries For Each Ends*/
 } 

 } /*OnRead Ends*/

 function fail(resp)
 {
 log(resp);
 defer.reject();
 } /*Fail Ends*/

 return defer.promise;

 } //Scan Function Ends
</code></pre>

try this. remove the promises if u wish and use a callback.promises is kind of broken. if you can fix then its ok else use a callback after push for FileType

I want to traverse through each file in the SD card inside all the directories and sub directories using the FILE API of phonegap (which is the w3c file api actually). I have to perform a certain set of operations on these files by looking at their nature. I donot want to search for specific types of files, but traverse through each file in a sequential manner.

Can someone please help me with this? Just a basic loop framework with the necessary requirements for the traversal would be a great help.

Thank You in advance.

traverse through each file in SD card using phonegap file api

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我想使用phonegap的文件API (实际上是w3c文件api )遍历SD卡中所有目录和子目录中的每个文件。通过查看这些文件的性质，我必须对它们执行一组特定的操作。我不想搜索特定类型的文件，而是按顺序遍历每个文件。有没有人能帮我一下？只需一个具有遍历所需要求的基本循环框架就会有很大帮助。提前谢谢你。

问使用phonegap文件api遍历SD卡中的每个文件
EN

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问使用phonegap文件api遍历SD卡中的每个文件EN