将justep的X5 Androidsdk 升级到30 备忘

--- title: File description: Read/write files on the device. --- <!-- # license: Licensed to the Apache Software Foundation (ASF) under one # or more contributor license agreements. See the NOTICE file # distributed with this work for additional information # regarding copyright ownership. The ASF licenses this file # to you under the Apache License, Version 2.0 (the # "License"); you may not use this file except in compliance # with the License. You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, # software distributed under the License is distributed on an # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY # KIND, either express or implied. See the License for the # specific language governing permissions and limitations # under the License. --> # cordova-plugin-file [](https://github.com/apache/cordova-plugin-file/actions/workflows/android.yml) [](https://github.com/apache/cordova-plugin-file/actions/workflows/chrome.yml) [](https://github.com/apache/cordova-plugin-file/actions/workflows/ios.yml) [](https://github.com/apache/cordova-plugin-file/actions/workflows/lint.yml) This plugin implements a File API allowing read/write access to files residing on the device. This plugin is based on several specs, including : The HTML5 File API [http://www.w3.org/TR/FileAPI/](http://www.w3.org/TR/FileAPI/) The Directories and System extensions Latest: [http://www.w3.org/TR/2012/WD-file-system-api-20120417/](http://www.w3.org/TR/2012/WD-file-system-api-20120417/) Although most of the plugin code was written when an earlier spec was current: [http://www.w3.org/TR/2011/WD-file-system-api-20110419/](http://www.w3.org/TR/2011/WD-file-system-api-20110419/) It also implements the FileWriter spec : [http://dev.w3.org/2009/dap/file-system/file-writer.html](http://dev.w3.org/2009/dap/file-system/file-writer.html) >*Note* While the W3C FileSystem spec is deprecated for web browsers, the FileSystem APIs are supported in Cordova applications with this plugin for the platforms listed in the _Supported Platforms_ list, with the exception of the Browser platform. To get a few ideas how to use the plugin, check out the [sample](#sample) at the bottom of this page. For additional examples (browser focused), see the HTML5 Rocks' [FileSystem article.](http://www.html5rocks.com/en/tutorials/file/filesystem/) For an overview of other storage options, refer to Cordova's [storage guide](http://cordova.apache.org/docs/en/latest/cordova/storage/storage.html). This plugin defines a global `cordova.file` object. Although the object is in the global scope, it is not available to applications until after the `deviceready` event fires. document.addEventListener("deviceready", onDeviceReady, false); function onDeviceReady() { console.log(cordova.file); } ## Installation cordova plugin add cordova-plugin-file ## Supported Platforms - Android - iOS - OS X - Windows* - Browser \* _These platforms do not support `FileReader.readAsArrayBuffer` nor `FileWriter.write(blob)`._ ## Where to Store Files As of v1.2.0, URLs to important file-system directories are provided. Each URL is in the form _file:///path/to/spot/_, and can be converted to a `DirectoryEntry` using `window.resolveLocalFileSystemURL()`. * `cordova.file.applicationDirectory` - Read-only directory where the application is installed. (_iOS_, _Android_, _BlackBerry 10_, _OSX_, _windows_) * `cordova.file.applicationStorageDirectory` - Root directory of the application's sandbox; on iOS & windows this location is read-only (but specific subdirectories [like `/Documents` on iOS or `/localState` on windows] are read-write). All data contained within is private to the app. (_iOS_, _Android_, _BlackBerry 10_, _OSX_) * `cordova.file.dataDirectory` - Persistent and private data storage within the application's sandbox using internal memory (on Android, if you need to use external memory, use `.externalDataDirectory`). On iOS, this directory is not synced with iCloud (use `.syncedDataDirectory`). (_iOS_, _Android_, _BlackBerry 10_, _windows_) * `cordova.file.cacheDirectory` - Directory for cached data files or any files that your app can re-create easily. The OS may delete these files when the device runs low on storage, nevertheless, apps should not rely on the OS to delete files in here. (_iOS_, _Android_, _BlackBerry 10_, _OSX_, _windows_) * `cordova.file.externalApplicationStorageDirectory` - Application space on external storage. (_Android_) * `cordova.file.externalDataDirectory` - Where to put app-specific data files on external storage. (_Android_) * `cordova.file.externalCacheDirectory` - Application cache on external storage. (_Android_) * `cordova.file.externalRootDirectory` - External storage (SD card) root. (_Android_, _BlackBerry 10_) * `cordova.file.tempDirectory` - Temp directory that the OS can clear at will. Do not rely on the OS to clear this directory; your app should always remove files as applicable. (_iOS_, _OSX_, _windows_) * `cordova.file.syncedDataDirectory` - Holds app-specific files that should be synced (e.g. to iCloud). (_iOS_, _windows_) * `cordova.file.documentsDirectory` - Files private to the app, but that are meaningful to other application (e.g. Office files). Note that for _OSX_ this is the user's `~/Documents` directory. (_iOS_, _OSX_) * `cordova.file.sharedDirectory` - Files globally available to all applications (_BlackBerry 10_) ## File System Layouts Although technically an implementation detail, it can be very useful to know how the `cordova.file.*` properties map to physical paths on a real device. ### iOS File System Layout | Device Path | `cordova.file.*` | `iosExtraFileSystems` | r/w? | persistent? | OS clears | sync | private | |:-----------------------------------------------|:----------------------------|:----------------------|:----:|:-----------:|:---------:|:----:|:-------:| | `/var/mobile/Applications/<UUID>/` | applicationStorageDirectory | - | r | N/A | N/A | N/A | Yes | | &nbsp;&nbsp;&nbsp;`appname.app/` | applicationDirectory | bundle | r | N/A | N/A | N/A | Yes | | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;`www/` | - | - | r | N/A | N/A | N/A | Yes | | &nbsp;&nbsp;&nbsp;`Documents/` | documentsDirectory | documents | r/w | Yes | No | Yes | Yes | | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;`NoCloud/` | - | documents-nosync | r/w | Yes | No | No | Yes | | &nbsp;&nbsp;&nbsp;`Library` | - | library | r/w | Yes | No | Yes? | Yes | | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;`NoCloud/` | dataDirectory | library-nosync | r/w | Yes | No | No | Yes | | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;`Cloud/` | syncedDataDirectory | - | r/w | Yes | No | Yes | Yes | | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;`Caches/` | cacheDirectory | cache | r/w | Yes* | Yes\*\*\*| No | Yes | | &n