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Extensions to resolve file paths from uri on Android
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| fun isExternalStorageDocument(uri: Uri) = "com.android.externalstorage.documents" == uri.authority | |
| fun isDownloadsDocument(uri: Uri) = "com.android.providers.downloads.documents" == uri.authority | |
| fun isMediaDocument(uri: Uri) = "com.android.providers.media.documents" == uri.authority | |
| /** | |
| * Get a file path from a Uri. This will get the the path for Storage Access | |
| * Framework Documents, as well as the _data field for the MediaStore and | |
| * other file-based ContentProviders. | |
| * | |
| * @param context The context. | |
| * @param uri The Uri to query. | |
| * @author paulburke | |
| */ | |
| fun Uri.getPath(context: Context): String? { | |
| val uri = this | |
| // DocumentProvider | |
| if (DocumentsContract.isDocumentUri(context, this)) { | |
| // ExternalStorageProvider | |
| if (isExternalStorageDocument(uri)) { | |
| val docId = DocumentsContract.getDocumentId(uri) | |
| val split = docId.split(":").toTypedArray() | |
| val type = split[0] | |
| if ("primary".equals(type, ignoreCase = true)) { | |
| return Environment.getExternalStorageDirectory().absolutePath + "/" + split[1] | |
| } | |
| // TODO handle non-primary volumes | |
| } else if (isDownloadsDocument(uri)) { | |
| val id = DocumentsContract.getDocumentId(uri) | |
| val contentUri = ContentUris.withAppendedId( | |
| Uri.parse("content://downloads/public_downloads"), java.lang.Long.valueOf(id) | |
| ) | |
| return contentUri?.getDataColumn(null, null) | |
| } else if (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 contentUri?.getDataColumn(selection, selectionArgs) | |
| }// MediaProvider | |
| // DownloadsProvider | |
| } else if ("content".equals(uri.scheme, ignoreCase = true)) { | |
| return uri.getDataColumn(null, null) | |
| } else if ("file".equals(uri.scheme, ignoreCase = true)) { | |
| return uri.path | |
| }// File | |
| // MediaStore (and general) | |
| return null | |
| } | |
| /** | |
| * Get the value of the data column for this Uri. This is useful for | |
| * MediaStore Uris, and other file-based ContentProviders. | |
| * | |
| * @param selection (Optional) Filter used in the query. | |
| * @param selectionArgs (Optional) Selection arguments used in the query. | |
| * @return The value of the _data column, which is typically a file path. | |
| */ | |
| fun Uri.getDataColumn( | |
| selection: String?, | |
| selectionArgs: Array<String>?, | |
| contentResolver: ContentResolver = appCtx.contentResolver | |
| ): String? { | |
| var cursor: Cursor? = null | |
| val column = "_data" | |
| val projection = arrayOf(column) | |
| try { | |
| cursor = contentResolver.query(this, projection, selection, selectionArgs, null) | |
| if (cursor?.moveToFirst() == true) { | |
| val columnIndex = cursor.getColumnIndexOrThrow(column) | |
| return cursor.getString(columnIndex) | |
| } | |
| } finally { | |
| cursor?.close() | |
| } | |
| return null | |
| } |
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