Sort NoteSheets by Date

app/src/main/java/core/notevault/MainActivity.java

@@ -19,6 +19,7 @@ import core.notevault.data.MusicNote;
 import core.notevault.data.NoteSheet;
 import core.notevault.databinding.ActivityMainBinding;
 import core.notevault.ui.metadatadialog.MetaDataDialog;
+import core.notevault.util.NoteSheetsUtil;
 
 import java.io.*;
 import java.nio.file.Files;

app/src/main/java/core/notevault/ui/home/HomeFragment.java

@@ -24,6 +24,7 @@ import core.notevault.data.MusicNote;
 import core.notevault.data.MusicNoteDAO;
 import core.notevault.databinding.FragmentHomeBinding;
 import core.notevault.ui.metadatadialog.MetaDataDialog;
+import core.notevault.util.NoteSheetsUtil;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -92,6 +93,8 @@ public class HomeFragment extends Fragment {
 
     private void handleFile(Uri... uris) {
         // Hier kannst du die Logik zum Speichern oder Anzeigen der Datei implementieren
+        NoteSheetsUtil.sortNoteSheetsByTimestamp(getContext(), uris);
+
         MetaDataDialog metaDataDialog = new MetaDataDialog();
         metaDataDialog.setFileUri(uris);
         metaDataDialog.show(getParentFragmentManager(), MetaDataDialog.TAG);

app/src/main/java/core/notevault/util/NoteSheetsUtil.java

@@ -0,0 +1,54 @@
+package core.notevault.util;
+
+import android.content.Context;
+import android.database.Cursor;
+import android.media.ExifInterface;
+import android.net.Uri;
+import android.provider.MediaStore;
+
+import java.io.File;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+import java.io.InputStream;
+import java.text.ParseException;
+import java.text.SimpleDateFormat;
+import java.util.*;
+
+public class NoteSheetsUtil {
+
+    private static long getImageTimestamp(Context context, Uri imageUri) {
+        try  {
+            InputStream inputStream = context.getContentResolver().openInputStream(imageUri);
+            ExifInterface exif = new ExifInterface(inputStream);
+
+            String dateTime = exif.getAttribute(ExifInterface.TAG_DATETIME);
+            if(dateTime != null) {
+                SimpleDateFormat format = new SimpleDateFormat("yyyy:MM:dd HH:mm:ss", Locale.getDefault());
+                Date date = format.parse(dateTime);
+                return date != null ? date.getTime() : 0;
+            } else {
+                File file = new File(imageUri.getPath());
+                return file.lastModified();
+            }
+        } catch (IOException | ParseException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    public static void sortNoteSheetsByTimestamp(Context context, Uri[] uris) {
+        ArrayList<UriTimestamp> uriTimestamps = new ArrayList<>();
+
+        for(Uri uri : uris) {
+            long timestamp = getImageTimestamp(context, uri);
+            uriTimestamps.add(new UriTimestamp(uri, timestamp));
+        }
+
+        Collections.sort(uriTimestamps, Comparator.comparingLong(UriTimestamp::getTimestamp));
+
+        for(int i=0; i<uriTimestamps.size(); i++) {
+            uris[i] = uriTimestamps.get(i).getUri();
+        }
+    }
+
+
+}

app/src/main/java/core/notevault/util/UriTimestamp.java

@@ -0,0 +1,21 @@
+package core.notevault.util;
+
+import android.net.Uri;
+
+public class UriTimestamp {
+    private final Uri uri;
+    private final long timestamp;
+
+    public UriTimestamp(Uri uri, long timestamp) {
+        this.uri = uri;
+        this.timestamp = timestamp;
+    }
+
+    public Uri getUri() {
+        return uri;
+    }
+
+    public long getTimestamp() {
+        return timestamp;
+    }
+}