Android Content开头的Uri和文件绝对路径互相转换

转绝对路径

fun getFilePathFromContentUri(
        selectedVideoUri: Uri,
        contentResolver: ContentResolver
    ): String {
        val filePath: String
        val filePathColumn = arrayOf<String>(MediaStore.MediaColumns.DATA)
        val cursor: Cursor =
            contentResolver.query(selectedVideoUri, filePathColumn, null, null, null)
        cursor.moveToFirst()
        val columnIndex: Int = cursor.getColumnIndex(filePathColumn[0])
        filePath = cursor.getString(columnIndex)
        cursor.close()
        return filePath
    }

2.绝对路径转uri

fun getImageContentUri(context: Context, imageFile: File): Uri? {
        val filePath = imageFile.absolutePath
        val cursor = context.contentResolver.query(
            MediaStore.Images.Media.EXTERNAL_CONTENT_URI, arrayOf(
                MediaStore.Images.Media._ID
            ), MediaStore.Images.Media.DATA + "=? ", arrayOf(filePath), null
        )
        return if (cursor != null && cursor.moveToFirst()) {
            val id = cursor.getInt(cursor.getColumnIndex(MediaStore.MediaColumns._ID))
            val baseUri = Uri.parse("content://media/external/images/media")
            Uri.withAppendedPath(baseUri, "" + id)
        } else {
            if (imageFile.exists()) {
                val values = ContentValues()
                values.put(MediaStore.Images.Media.DATA, filePath)
                context.contentResolver.insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values)
            } else {
                null
            }
        }
    }