文件下载cordovaFileTransfer：cordova.file.documentsDirectory is null

在Android平台上使用：$cordovaFileTransfer进行文件下载时提示：cordova.file.documentsDirectory is null，查了以下文档参照：http://ngcordova.com/docs/plugins/file/，

documentsDirectory是IOS平台的用法，在Android平台上没有此方法所以获取到null,解决方法：

通过使用：$cordovaDevice.getPlatform()获取应用平台，针对不同平台进行文件下载处理：

IOS使用:cordova.file.documentsDirectory

Android使用:cordova.file.externalRootDirectory

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
`appname.app/`	applicationDirectory	bundle	r	N/A	N/A	N/A	Yes
`www/`	-	-	r	N/A	N/A	N/A	Yes
`Documents/`	documentsDirectory	documents	r/w	Yes	No	Yes	Yes
`NoCloud/`	-	documents-nosync	r/w	Yes	No	No	Yes
`Library`	-	library	r/w	Yes	No	Yes?	Yes
`NoCloud/`	dataDirectory	library-nosync	r/w	Yes	No	No	Yes
`Cloud/`	syncedDataDirectory	-	r/w	Yes	No	Yes	Yes
`Caches/`	cacheDirectory	cache	r/w	Yes*	Yes***	No	Yes
`tmp/`	tempDirectory	-	r/w	No**

Device Path	`cordova.file.*`	`AndroidExtraFileSystems`	r/w?	persistent?	OS clears	private
`file:///android_asset/`	applicationDirectory		r	N/A	N/A	Yes
`/data/data/<app-id>/`	applicationStorageDirectory	-	r/w	N/A	N/A	Yes
`cache`	cacheDirectory	cache	r/w	Yes	Yes*	Yes
`files`	dataDirectory	files	r/w	Yes	No	Yes
`Documents`		documents	r/w	Yes	No	Yes
`<sdcard>/`	externalRootDirectory	sdcard	r/w	Yes	No	No
`Android/data/<app-id>/`	externalApplicationStorageDirectory	-	r/w	Yes	No	No
`cache`	externalCacheDirectry	cache-external	r/w	Yes	No**	No
`files`	externalDataDirectory	files-external	r/w

更多相关文章