使用此函数,我们可以从URI获取实际路径:
这是getRealPathFromURI
的代码:
fun getRealPathFromURI(context: Context, uri: Uri): String? {
when {
DocumentsContract.isDocumentUri(context, uri) -> {
when {
isExternalStorageDocument(uri) -> {
val docId = DocumentsContract.getDocumentId(uri)
val split = docId.split(":").toTypedArray()
val type = split[0]
return if ("primary".equals(type, ignoreCase = true)) {
if (split.size > 1) {
Environment.getExternalStorageDirectory().toString() + "/" + split[1]
} else {
Environment.getExternalStorageDirectory().toString() + "/"
}
} else {
"storage" + "/" + docId.replace(":", "/")
}
}
isDownloadsDocument(uri) -> {
val fileName = getFilePath(context, uri)
if (fileName != null) {
return Environment.getExternalStorageDirectory().toString() + "/Download/" + fileName
}
var id = DocumentsContract.getDocumentId(uri)
if (id.startsWith("raw:")) {
id = id.replaceFirst("raw:".toRegex(), "")
val file = File(id)
if (file.exists()) return id
}
val contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), java.lang.Long.valueOf(id))
return getDataColumn(context, contentUri, null, null)
}
isMediaDocument(uri) -> {
val docId = DocumentsContract.getDocumentId(uri)
val split = docId.split(":").toTypedArray()
val type = split[0]
var contentUri: Uri? = null
when (type) {
"image" -> {
contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI
}
"video" -> {
contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI
}
"audio" -> {
contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI
}
}
val selection = "_id=?"
val selectionArgs = arrayOf(split[1])
return getDataColumn(context, contentUri, selection, selectionArgs)
}
}
}
"content".equals(uri.scheme, ignoreCase = true) -> {
return if (isGooglePhotosUri(uri)) uri.lastPathSegment else getDataColumn(context, uri, null, null)
}
"file".equals(uri.scheme, ignoreCase = true) -> {
return uri.path
}
}
return null
}
fun getDataColumn(context: Context, uri: Uri?, selection: String?,
selectionArgs: Array<String>?): String? {
var cursor: Cursor? = null
val column = "_data"
val projection = arrayOf(
column
)
try {
if (uri == null) return null
cursor = context.contentResolver.query(uri, projection, selection, selectionArgs,
null)
if (cursor != null && cursor.moveToFirst()) {
val index = cursor.getColumnIndexOrThrow(column)
return cursor.getString(index)
}
} finally {
cursor?.close()
}
return null
}
fun getFilePath(context: Context, uri: Uri?): String? {
var cursor: Cursor? = null
val projection = arrayOf(
MediaStore.MediaColumns.DISPLAY_NAME
)
try {
if (uri == null) return null
cursor = context.contentResolver.query(uri, projection, null, null,
null)
if (cursor != null && cursor.moveToFirst()) {
val index = cursor.getColumnIndexOrThrow(MediaStore.MediaColumns.DISPLAY_NAME)
return cursor.getString(index)
}
} finally {
cursor?.close()
}
return null
}
fun isExternalStorageDocument(uri: Uri): Boolean {
return "com.android.externalstorage.documents" == uri.authority
}
fun isDownloadsDocument(uri: Uri): Boolean {
return "com.android.providers.downloads.documents" == uri.authority
}
fun isMediaDocument(uri: Uri): Boolean {
return "com.android.providers.media.documents" == uri.authority
}
fun isGooglePhotosUri(uri: Uri): Boolean {
return "com.google.android.apps.photos.content" == uri.authority
}
在您的Activity或Fragment中使用getRealPathFromURI
函数来获取真实路径,绕过URI:
val fileRealPath = getRealPathFromURI(context!!, fileURI) ?: ""
DocumentsContract
自API 19 KitKat版本才可用,那么它是如何在所有Android版本上运行的呢? - Hendra Anggrian