如何访问外部存储与科尔多瓦文件/文件系统的根插件? [英] How to access external storage with cordova file / file-system-roots plugins?
问题描述
问题描述:
我可以访问内部存储有任何文件或文件系统的根(读写)。但是,这样的文件无法从其他应用程序访问。例如,如果我想通过emailComposerPlugin发送此文件,该文件无法通过电子邮件客户端访问。 (同样适用于功能打开方式。)
如果我更改选项 {沙盒:真}
为假(写入外部存储),这是行不通的,并在FileUtils.UNKNOWN_ERR结束。我尝试了应用程序,而手机从USB断开,因为一些实况提到,尽管安装在PC外部存储设备不能被访问 - 同样的结果,虽然
从我读的邮件列表这应该是可能的。它接缝我错过了关键点?
背景: 我尝试启用为iPhone创建一个混合应用程序在Android设备上运行。有一个小操场上,我创建了一个小的测试项目。
编辑: 有接缝是文件系统的根和文件的插件之间的问题。但我有他们两人的最新版本。 (文件:1.0.1文件系统的根:0.1.0) 调试文件系统和文件类表明
私人字符串fullPathForLocalURL(URI URL){
如果(FILESYSTEM_PROTOCOL.equals(URL.getScheme())及&安培;本地主机.equals(URL.getHost())){
字符串路径= URL.getPath();
如果(URL.getQuery()!= NULL){
路径=路径+? + URL.getQuery();
}
返回path.substring(path.indexOf('/',1));
//路径=/缓存外在这一点上
//导致索引越界异常
我有什么企图?
confix.xml
< preference名=AndroidExtraFilesystems值=文件,文件,外部文件,SD卡,高速缓存,缓存外部/>
AndroidManifest.xml中
<使用-权限的Android:名称=android.permission.WRITE_EXTERNAL_STORAGE/>
JavaScript的code
函数createTextDocument(文件名,文字){
cordova.filesystem.getDirectoryForPurpose(缓存,{沙盒:假},successCallback,failureCallback);
功能successCallback(的DirectoryEntry){
的console.log(目录下找到(科尔多瓦):'+ directoryEntry.toURL());
的console.log(目录下找到(原生):+ directoryEntry.toNativeURL());
directoryEntry.getFile(文件名,{创建:真实,独家:假},
功能(fileEntry){
变种文件路径= fileEntry.toNativeURL();
fileEntry.createWriter(
功能(的FileWriter){
的console.log('开始写:'+文件路径);
fileWriter.write(文本);
的console.log(文件写入);
},failureCallback
);
},failureCallback
);
}
功能failureCallback(错误){
的console.log('错误创建文件:+错误code);
//结果code 1000
}
}
挖掘这整个主题相当多之后,我想通了:
- 无需为文件系统根插件。
- 在有需要在config.xml中更多的配置。
- 您需要用不标准的FileApi方式,但下面的访问文件。
JavaScript的用法:
window.resolveLocalFileSystemURL(路径,cbSuccess,cbFail);
@param路径:{string}里用方案的科尔多瓦路径:
cdvfile://本地主机/<文件系统名称> /<路径到文件>
例如:cdvfile://本地主机/ SD卡/路径/要/全球/文件'
cdvfile://localhost/cache/onlyVisibleToTheApp.txt
@param cbSuccess:{}功能一个接收一个DirectoryEntry对象回调方法。
@param cbSuccess:{}功能一个接收一个FileError对象回调方法。
confix.xml
< preference名=AndroidPersistentFileLocation值=兼容性/>
< preference名=AndroidExtraFilesystems值=SD卡,高速缓存/>
AndroidManifest.xml中
<使用-权限的Android:名称=android.permission.WRITE_EXTERNAL_STORAGE/>
Problem description:
I can access the internal storage with either the file or the file-system-roots (read and write). But such a file can not be access from an other app. For example if i want to send this file through the emailComposerPlugin, the file can not be accessed by the email client. (Same goes for the "open with" function.)
If i change the options {sandboxed: true}
to false (to write to the external storage), it does not work and ends up in a FileUtils.UNKNOWN_ERR. I tried the application while the phone disconnected from USB, as some docu mention that external storage can not be accessed while mounted on the pc - same result though.
From what i read on the mailing list this should be possible. It seams i miss a crucial point?
Context: I try to enable an hybrid application created for iPhone to run on android devices. To have a little playground, i create a small test project.
Edit: There seams to be a problem between file-system-roots and file plugin. But i have the newest versions of both of them. (File: 1.0.1 File-system-roots: 0.1.0) Debugging the file-system and file classes show that
private String fullPathForLocalURL(Uri URL) {
if (FILESYSTEM_PROTOCOL.equals(URL.getScheme()) && "localhost".equals(URL.getHost())) {
String path = URL.getPath();
if (URL.getQuery() != null) {
path = path + "?" + URL.getQuery();
}
return path.substring(path.indexOf('/', 1));
// path = "/cache-external" at this point
// results in index out of bounds exception
What have i tried?
confix.xml
<preference name="AndroidExtraFilesystems" value="files,files-external,documents,sdcard,cache,cache-external" />
AndroidManifest.xml
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
javascript code
function createTextDocument(filename, text) {
cordova.filesystem.getDirectoryForPurpose('cache', {sandboxed: false}, successCallback, failureCallback);
function successCallback(directoryEntry){
console.log('directory found (cordova): ' + directoryEntry.toURL());
console.log('directory found (native) : ' + directoryEntry.toNativeURL());
directoryEntry.getFile(filename, {create: true, exclusive: false},
function(fileEntry){
var filePath = fileEntry.toNativeURL();
fileEntry.createWriter(
function(fileWriter){
console.log('start writing to: ' + filePath );
fileWriter.write(text);
console.log('file written');
},failureCallback
);
}, failureCallback
);
}
function failureCallback(error){
console.log('error creating file: ' + error.code);
// results in code 1000
}
}
After digging this whole topic quite a bit, i figured out:
- There is no need for the file system roots plugin.
- There is more configuration needed in config.xml.
- You need to use not the standard FileApi way, but the following to access the files.
JavaScript usage:
window.resolveLocalFileSystemURL(path, cbSuccess, cbFail);
@param path: {string} a cordova path with scheme:
'cdvfile://localhost/<file-system-name>/<path-to-file>'
Examples: 'cdvfile://localhost/sdcard/path/to/global/file'
'cdvfile://localhost/cache/onlyVisibleToTheApp.txt'
@param cbSuccess: {function} a callback method that receives a DirectoryEntry object.
@param cbSuccess: {Function} a callback method that receives a FileError object.
confix.xml
<preference name="AndroidPersistentFileLocation" value="Compatibility" />
<preference name="AndroidExtraFilesystems" value="sdcard,cache" />
AndroidManifest.xml
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
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