diff --git a/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/FileImageProvider.kt b/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/FileImageProvider.kt
index 60940ee4f..a002183d2 100644
--- a/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/FileImageProvider.kt
+++ b/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/FileImageProvider.kt
@@ -6,6 +6,7 @@ import android.content.ContextWrapper
 import android.net.Uri
 import android.util.Log
 import android.webkit.MimeTypeMap
+import deckers.thibault.aves.model.EntryFields
 import deckers.thibault.aves.model.FieldMap
 import deckers.thibault.aves.model.SourceEntry
 import deckers.thibault.aves.utils.LogUtils
@@ -88,9 +89,9 @@ internal class FileImageProvider : ImageProvider() {
         }
 
         return hashMapOf(
-            "uri" to Uri.fromFile(newFile).toString(),
-            "path" to newFile.path,
-            "dateModifiedSecs" to newFile.lastModified() / 1000,
+            EntryFields.URI to Uri.fromFile(newFile).toString(),
+            EntryFields.PATH to newFile.path,
+            EntryFields.DATE_MODIFIED_SECS to newFile.lastModified() / 1000,
         )
     }
 
@@ -98,8 +99,8 @@ internal class FileImageProvider : ImageProvider() {
         try {
             val file = File(path)
             if (file.exists()) {
-                newFields["dateModifiedSecs"] = file.lastModified() / 1000
-                newFields["sizeBytes"] = file.length()
+                newFields[EntryFields.DATE_MODIFIED_SECS] = file.lastModified() / 1000
+                newFields[EntryFields.SIZE_BYTES] = file.length()
             }
             callback.onSuccess(newFields)
         } catch (e: SecurityException) {
diff --git a/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/ImageProvider.kt b/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/ImageProvider.kt
index 4239a60ad..51e4d5e66 100644
--- a/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/ImageProvider.kt
+++ b/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/ImageProvider.kt
@@ -64,6 +64,7 @@ import java.util.TimeZone
 import kotlin.math.absoluteValue
 import androidx.exifinterface.media.ExifInterfaceFork as ExifInterface
 import androidx.core.net.toUri
+import deckers.thibault.aves.model.EntryFields
 
 abstract class ImageProvider {
     open fun fetchSingle(context: Context, uri: Uri, sourceMimeType: String?, allowUnsized: Boolean, callback: ImageOpCallback) {
@@ -74,10 +75,10 @@ abstract class ImageProvider {
         return if (StorageUtils.isInVault(context, path)) {
             val uri = Uri.fromFile(File(path))
             hashMapOf(
-                "origin" to SourceEntry.ORIGIN_VAULT,
-                "uri" to uri.toString(),
-                "contentId" to null,
-                "path" to path,
+                EntryFields.ORIGIN to SourceEntry.ORIGIN_VAULT,
+                EntryFields.URI to uri.toString(),
+                EntryFields.CONTENT_ID to null,
+                EntryFields.PATH to path,
             )
         } else {
             MediaStoreImageProvider().scanNewPathByMediaStore(context, path, mimeType)
@@ -361,7 +362,7 @@ abstract class ImageProvider {
             )
 
             val newFields = scanNewPath(activity, targetPath, exportMimeType)
-            val targetUri = (newFields["uri"] as String).toUri()
+            val targetUri = (newFields[EntryFields.URI] as String).toUri()
             if (writeMetadata) {
                 copyMetadata(
                     context = activity,
diff --git a/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/MediaStoreImageProvider.kt b/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/MediaStoreImageProvider.kt
index 6bd17b757..d635d62fb 100644
--- a/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/MediaStoreImageProvider.kt
+++ b/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/MediaStoreImageProvider.kt
@@ -598,8 +598,8 @@ class MediaStoreImageProvider : ImageProvider() {
         }
         return if (toBin) {
             hashMapOf(
-                "trashed" to true,
-                "trashPath" to targetPath,
+                EntryFields.TRASHED to true,
+                EntryFields.TRASH_PATH to targetPath,
             )
         } else {
             scanNewPath(activity, targetPath, mimeType)
@@ -912,13 +912,13 @@ class MediaStoreImageProvider : ImageProvider() {
                     val cursor = context.contentResolver.query(uri, projection, null, null, null)
                     if (cursor != null && cursor.moveToFirst()) {
                         val newFields = hashMapOf<String, Any?>(
-                            "origin" to SourceEntry.ORIGIN_MEDIA_STORE_CONTENT,
-                            "uri" to uri.toString(),
-                            "contentId" to uri.tryParseId(),
-                            "path" to path,
+                            EntryFields.ORIGIN to SourceEntry.ORIGIN_MEDIA_STORE_CONTENT,
+                            EntryFields.URI to uri.toString(),
+                            EntryFields.CONTENT_ID to uri.tryParseId(),
+                            EntryFields.PATH to path,
                         )
-                        cursor.getColumnIndex(MediaStore.MediaColumns.DATE_ADDED).let { if (it != -1) newFields["dateAddedSecs"] = cursor.getInt(it) }
-                        cursor.getColumnIndex(MediaStore.MediaColumns.DATE_MODIFIED).let { if (it != -1) newFields["dateModifiedSecs"] = cursor.getInt(it) }
+                        cursor.getColumnIndex(MediaStore.MediaColumns.DATE_ADDED).let { if (it != -1) newFields[EntryFields.DATE_ADDED_SECS] = cursor.getInt(it) }
+                        cursor.getColumnIndex(MediaStore.MediaColumns.DATE_MODIFIED).let { if (it != -1) newFields[EntryFields.DATE_MODIFIED_SECS] = cursor.getInt(it) }
                         cursor.close()
                         return newFields
                     }
diff --git a/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/UnknownContentProvider.kt b/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/UnknownContentProvider.kt
index ffcc2400f..db2b583b6 100644
--- a/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/UnknownContentProvider.kt
+++ b/android/app/src/main/kotlin/deckers/thibault/aves/model/provider/UnknownContentProvider.kt
@@ -7,6 +7,7 @@ import android.provider.OpenableColumns
 import android.util.Log
 import deckers.thibault.aves.metadata.Metadata
 import deckers.thibault.aves.metadata.metadataextractor.Helper
+import deckers.thibault.aves.model.EntryFields
 import deckers.thibault.aves.model.FieldMap
 import deckers.thibault.aves.model.SourceEntry
 import deckers.thibault.aves.utils.LogUtils
@@ -43,9 +44,9 @@ open class UnknownContentProvider : ImageProvider() {
         }
 
         val fields: FieldMap = hashMapOf(
-            "origin" to SourceEntry.ORIGIN_UNKNOWN_CONTENT,
-            "uri" to uri.toString(),
-            "sourceMimeType" to mimeType,
+            EntryFields.ORIGIN to SourceEntry.ORIGIN_UNKNOWN_CONTENT,
+            EntryFields.URI to uri.toString(),
+            EntryFields.SOURCE_MIME_TYPE to mimeType,
         )
         try {
             // some providers do not provide the mandatory `OpenableColumns`
@@ -53,11 +54,11 @@ open class UnknownContentProvider : ImageProvider() {
             // e.g. `content://mms/part/[id]` on Android KitKat
             val cursor = context.contentResolver.query(uri, null, null, null, null)
             if (cursor != null && cursor.moveToFirst()) {
-                cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME).let { if (it != -1) fields["title"] = cursor.getString(it) }
-                cursor.getColumnIndex(OpenableColumns.SIZE).let { if (it != -1) fields["sizeBytes"] = cursor.getLong(it) }
-                cursor.getColumnIndex(MediaStore.MediaColumns.DATA).let { if (it != -1) fields["path"] = cursor.getString(it) }
+                cursor.getColumnIndex(OpenableColumns.DISPLAY_NAME).let { if (it != -1) fields[EntryFields.TITLE] = cursor.getString(it) }
+                cursor.getColumnIndex(OpenableColumns.SIZE).let { if (it != -1) fields[EntryFields.SIZE_BYTES] = cursor.getLong(it) }
+                cursor.getColumnIndex(MediaStore.MediaColumns.DATA).let { if (it != -1) fields[EntryFields.PATH] = cursor.getString(it) }
                 // mime type fallback if it was not provided and not found via `metadata-extractor`
-                cursor.getColumnIndex(MediaStore.MediaColumns.MIME_TYPE).let { if (it != -1 && mimeType == null) fields["sourceMimeType"] = cursor.getString(it) }
+                cursor.getColumnIndex(MediaStore.MediaColumns.MIME_TYPE).let { if (it != -1 && mimeType == null) fields[EntryFields.SOURCE_MIME_TYPE] = cursor.getString(it) }
                 cursor.close()
             }
         } catch (e: Exception) {
@@ -65,7 +66,7 @@ open class UnknownContentProvider : ImageProvider() {
             return
         }
 
-        if (fields["sourceMimeType"] == null) {
+        if (fields[EntryFields.SOURCE_MIME_TYPE] == null) {
             callback.onFailure(Exception("Failed to find MIME type for uri=$uri"))
             return
         }