file: Uri值时才有效。例如，支持仅content: Uri值的<intent-filter>将起作用。Android 11 解决文件访问问题，无需使用MANAGE_EXTERNAL_STORAGE。我已添加代码以获取文档文件并上传到服务器。
AndroidManifest
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<application
android:preserveLegacyExternalStorage="true"
android:requestLegacyExternalStorage="true"
</application>
现在，在你的项目中添加这个库
https://github.com/FivesoftCode/FilePicker
将以下代码添加到Activity/Fragment中
FilePicker.from(activity)
.setFileTypes(FilePicker.IMAGE, FilePicker.VIDEO) //Set file types you want to pick.
.setAllowMultipleFiles(true) //Allow user to select multiple files
.setListener { files -> //Wait for results
if (files != null && files.size > 0) {
//Do something with uris.
for (items in files) {
val extension: String = getMimeType(activity!!,items)!!
if (extension == "pdf") {
val cacheDir: String = context!!.cacheDir.toString()
val getCopyFilePath = copyFileToInternalStorage(context!!,items,cacheDir)
Log.e("TAG", "getPathToUploadDoc: " + getCopyFilePath )
}
}
} else {
//Add msg here...
}
}
.setTitle("Pick a file from My Files")
.pick() //Open file picker
fun getMimeType(context: Context, uri: Uri): String? {
val extension: String?
//Check uri format to avoid null
extension = if (uri.scheme == ContentResolver.SCHEME_CONTENT) {
//If scheme is a content
val mime = MimeTypeMap.getSingleton()
mime.getExtensionFromMimeType(context.contentResolver.getType(uri))
} else {
//If scheme is a File
//This will replace white spaces with %20 and also other special characters. This will avoid returning null values on file name with spaces and special characters.
MimeTypeMap.getFileExtensionFromUrl(Uri.fromFile(File(uri.path)).toString())
}
return extension
}
fun getFiledetails(uri: Uri,context: Context,getCopyFilePath:String): NormalFile? {
// var result: String? = null
if (uri.scheme == "content") {
val cursor: Cursor = context.contentResolver.query(uri,
FileLoader.FILE_PROJECTION, null, null, null)!!
try {
if (cursor != null && cursor.moveToFirst()) {
// result = cursor.getString(cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME))
val path: String = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA))
if (path != null && path != "") {
//Create a File instance
cursor.getLong(cursor.getColumnIndexOrThrow(BaseColumns._ID))
// cursor.getLong(cursor.getColumnIndexOrThrow(BaseColumns._ID)).toInt()
cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.TITLE))
// cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATA))
cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.SIZE))
cursor.getLong(cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DATE_ADDED))
cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Files.FileColumns.MIME_TYPE))
}
}
} finally {
cursor.close()
}
}
/*if (result == null) {
result = uri.path
val cut = result!!.lastIndexOf('/')
if (cut != -1) {
result = result.substring(cut + 1)
}
}*/
return file
}
fun copyFileToInternalStorage(context: Context?,uri: Uri, newDirName: String): String? {
val returnCursor = context!!.contentResolver.query(
uri, arrayOf(
OpenableColumns.DISPLAY_NAME, OpenableColumns.SIZE
), null, null, null
)
/*
* Get the column indexes of the data in the Cursor,
* * move to the first row in the Cursor, get the data,
* * and display it.
* */
val nameIndex = returnCursor!!.getColumnIndex(OpenableColumns.DISPLAY_NAME)
val sizeIndex = returnCursor.getColumnIndex(OpenableColumns.SIZE)
returnCursor.moveToFirst()
val name = returnCursor.getString(nameIndex)
val size = java.lang.Long.toString(returnCursor.getLong(sizeIndex))
val output: File
output = if (newDirName != "") {
val dir = File(/*context!!.filesDir.toString() + "/" +*/ newDirName)
if (!dir.exists()) {
dir.mkdir()
}
File(/*context!!.filesDir.toString() + "/" +*/ newDirName + "/" + name)
} else {
File(context!!.filesDir.toString() + "/" + name)
}
try {
val inputStream: InputStream? = context!!.contentResolver.openInputStream(uri)
val outputStream = FileOutputStream(output)
var read = 0
val bufferSize = 1024
val buffers = ByteArray(bufferSize)
while (inputStream?.read(buffers).also { read = it!! } != -1) {
outputStream.write(buffers, 0, read)
}
inputStream?.close()
outputStream.close()
} catch (e: Exception) {
Log.e("Exception", e.message!!)
}
return output.path
}
上传文档
implementation 'net.gotev:uploadservice:2.1'
var uploadId = UUID.randomUUID().toString()
val url = ServerConfig.MAIN_URL
uploadReceiver.setDelegate(this)
uploadReceiver.setUploadID(uploadId)
val data = MultipartUploadRequest(mContext, uploadId, url)
.addFileToUpload(path, "attachment")
.addHeader("Authentication", getMD5EncryptedString())
.addParameter(USER_ID,1)
.setMaxRetries(5)
.startUpload()
fun getMD5EncryptedString(): String {
val encTarget = ServerConfig.AUTHENTICATE_VALUE //Any pwd
var mdEnc: MessageDigest? = null
try {
mdEnc = MessageDigest.getInstance("MD5")
} catch (e: NoSuchAlgorithmException) {
println("Exception while encrypting to md5")
e.printStackTrace()
}
mdEnc!!.update(encTarget.toByteArray(), 0, encTarget.length)
var md5 = BigInteger(1, mdEnc.digest()).toString(16)
while (md5.length < 32) {
md5 = "0$md5"
}
return md5
}