.idea/gradle.xml

@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="GradleMigrationSettings" migrationVersion="1" />
   <component name="GradleSettings">
     <option name="linkedExternalProjectsSettings">
       <GradleProjectSettings>

.idea/misc.xml

@@ -4,7 +4,7 @@
   <component name="FrameworkDetectionExcludesConfiguration">
     <file type="web" url="file://$PROJECT_DIR$" />
   </component>
-  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" project-jdk-name="21" project-jdk-type="JavaSDK">
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_21" default="true" project-jdk-name="21" project-jdk-type="JavaSDK">
     <output url="file://$PROJECT_DIR$/build/classes" />
   </component>
   <component name="ProjectType">

.idea/runConfigurations.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="RunConfigurationProducerService">
+    <option name="ignoredProducers">
+      <set>
+        <option value="com.intellij.execution.junit.AbstractAllInDirectoryConfigurationProducer" />
+        <option value="com.intellij.execution.junit.AllInPackageConfigurationProducer" />
+        <option value="com.intellij.execution.junit.PatternConfigurationProducer" />
+        <option value="com.intellij.execution.junit.TestInClassConfigurationProducer" />
+        <option value="com.intellij.execution.junit.UniqueIdConfigurationProducer" />
+        <option value="com.intellij.execution.junit.testDiscovery.JUnitTestDiscoveryConfigurationProducer" />
+        <option value="org.jetbrains.kotlin.idea.junit.KotlinJUnitRunConfigurationProducer" />
+        <option value="org.jetbrains.kotlin.idea.junit.KotlinPatternConfigurationProducer" />
+      </set>
+    </option>
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="" vcs="Git" />
+  </component>
+</project>

app/src/main/java/com/stormtales/notevault/MainActivity.java

@@ -26,14 +26,14 @@ public class MainActivity extends AppCompatActivity {
         setContentView(binding.getRoot());
 
         setSupportActionBar(binding.appBarMain.toolbar);
-        binding.appBarMain.fab.setOnClickListener(new View.OnClickListener() {
+        /*binding.appBarMain.fab.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View view) {
                 Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                         .setAction("Action", null)
                         .setAnchorView(R.id.fab).show();
             }
-        });
+        });*/
         DrawerLayout drawer = binding.drawerLayout;
         NavigationView navigationView = binding.navView;
         // Passing each menu ID as a set of Ids because each

app/src/main/java/com/stormtales/notevault/data/MusicDatabase.java

@@ -6,11 +6,12 @@ import androidx.room.Room;
 import androidx.room.RoomDatabase;
 import androidx.room.TypeConverters;
 import com.stormtales.notevault.data.entities.Song;
-import com.stormtales.notevault.data.repositories.SongDao;
+import com.stormtales.notevault.data.dao.SongDao;
+import com.stormtales.notevault.data.sync.DateConverter;
 import com.stormtales.notevault.data.sync.SyncStatusConverter;
 
 @Database(entities = {Song.class}, version = 1, exportSchema = false)
-@TypeConverters(SyncStatusConverter.class)
+@TypeConverters({SyncStatusConverter.class, DateConverter.class})
 public abstract class MusicDatabase extends RoomDatabase {
     public abstract SongDao getSongTable();
 

app/src/main/java/com/stormtales/notevault/data/dao/SongDao.java

@@ -0,0 +1,17 @@
+package com.stormtales.notevault.data.dao;
+
+import androidx.room.Dao;
+import androidx.room.Insert;
+import androidx.room.Query;
+import com.stormtales.notevault.data.entities.Song;
+
+import java.util.List;
+
+@Dao
+public interface SongDao {
+    @Insert
+    void insert(Song song);
+
+    @Query("SELECT * FROM song")
+    List<Song> getAllSongs();
+}

app/src/main/java/com/stormtales/notevault/data/entities/Song.java

@@ -1,6 +1,7 @@
 package com.stormtales.notevault.data.entities;
 
 import androidx.room.Entity;
+import androidx.room.Ignore;
 import androidx.room.PrimaryKey;
 import com.stormtales.notevault.data.sync.SyncStatus;
 
@@ -22,6 +23,14 @@ public class Song {
     private String genre;
     private int year;
 
+    @Ignore
+    public Song(String title, String composer, String genre, int year) {
+        this.title = title;
+        this.composer = composer;
+        this.genre = genre;
+        this.year = year;
+    }
+
     public int getLocalID() {
         return localID;
     }

app/src/main/java/com/stormtales/notevault/data/repositories/SongDao.java

@@ -1,7 +0,0 @@
-package com.stormtales.notevault.data.repositories;
-
-import androidx.room.Dao;
-
-@Dao
-public interface SongDao {
-}

app/src/main/java/com/stormtales/notevault/data/repositories/SongRepository.java

@@ -0,0 +1,21 @@
+package com.stormtales.notevault.data.repositories;
+
+import android.app.Application;
+import com.stormtales.notevault.data.MusicDatabase;
+import com.stormtales.notevault.data.dao.SongDao;
+import com.stormtales.notevault.data.entities.Song;
+
+import java.util.concurrent.Executors;
+
+public class SongRepository {
+    private SongDao songDao;
+    public SongRepository(Application application) {
+        MusicDatabase database = MusicDatabase.getDatabase(application);
+        songDao = database.getSongTable();
+    }
+    public void insert(Song song) {
+        Executors.newSingleThreadExecutor().execute(() -> {
+            songDao.insert(song);
+        });
+    }
+}

app/src/main/java/com/stormtales/notevault/data/sync/DateConverter.java

@@ -0,0 +1,20 @@
+package com.stormtales.notevault.data.sync;
+
+import androidx.room.TypeConverter;
+
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+public class DateConverter {
+    // Konvertiere LocalDateTime in String
+    @TypeConverter
+    public static String fromLocalDateTime(LocalDateTime localDateTime) {
+        return localDateTime == null ? null : localDateTime.format(DateTimeFormatter.ISO_LOCAL_DATE_TIME);
+    }
+
+    // Konvertiere String zurück in LocalDateTime
+    @TypeConverter
+    public static LocalDateTime toLocalDateTime(String dateTimeString) {
+        return dateTimeString == null ? null : LocalDateTime.parse(dateTimeString, DateTimeFormatter.ISO_LOCAL_DATE_TIME);
+    }
+}

app/src/main/java/com/stormtales/notevault/ui/home/HomeFragment.java

@@ -1,18 +1,30 @@
 package com.stormtales.notevault.ui.home;
 
+import android.app.Activity;
+import android.content.Intent;
+import android.net.Uri;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
 import android.widget.TextView;
+import android.widget.Toast;
+import androidx.activity.result.ActivityResult;
+import androidx.activity.result.ActivityResultCallback;
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts;
 import androidx.annotation.NonNull;
 import androidx.fragment.app.Fragment;
 import androidx.lifecycle.ViewModelProvider;
+import com.google.android.material.floatingactionbutton.FloatingActionButton;
+import com.stormtales.notevault.R;
 import com.stormtales.notevault.databinding.FragmentHomeBinding;
+import com.stormtales.notevault.ui.songeditor.SongEditorDialog;
 
 public class HomeFragment extends Fragment {
 
     private FragmentHomeBinding binding;
+    private static final int PICK_FILE_REQUEST_CODE = 1;
 
     public View onCreateView(@NonNull LayoutInflater inflater,
                              ViewGroup container, Bundle savedInstanceState) {
@@ -21,6 +33,42 @@ public class HomeFragment extends Fragment {
 
         binding = FragmentHomeBinding.inflate(inflater, container, false);
         View root = binding.getRoot();
+        ActivityResultLauncher<Intent> launcher = registerForActivityResult(
+                new ActivityResultContracts.StartActivityForResult(),
+                activityResult -> {
+                    getActivity();
+                    if(activityResult.getResultCode() == Activity.RESULT_OK && activityResult.getData() != null) {
+                        if(activityResult.getData().getClipData() != null) {
+                            int fileNumber = activityResult.getData().getClipData().getItemCount();
+                            Uri[] files = new Uri[fileNumber];
+                            for(int i = 0; i < fileNumber; i++) {
+                                files[i] = activityResult.getData().getClipData().getItemAt(i).getUri();
+                                Toast.makeText(requireContext(), "Uri: " + files[i].toString(), Toast.LENGTH_SHORT).show();
+                            }
+                            handleSelectedNoteSheets(files);
+                        } else {
+                            Uri uri = activityResult.getData().getData();
+                            Toast.makeText(requireContext(), "Uri: " + uri.toString(), Toast.LENGTH_SHORT).show();
+                            handleSelectedNoteSheets(uri);
+                        }
+                    }
+                }
+        );
+
+        FloatingActionButton importBtn = root.findViewById(R.id.addSongBtn);
+        importBtn.setOnClickListener(v -> {
+            Intent intent = new Intent(Intent.ACTION_OPEN_DOCUMENT);
+            intent.setType("*/*"); // Alle Dateitypen
+
+            String[] mimeTypes = {"application/pdf", "image/png", "image/jpeg"};
+            intent.putExtra(Intent.EXTRA_MIME_TYPES, mimeTypes);
+            intent.putExtra(Intent.EXTRA_ALLOW_MULTIPLE, true);
+
+            intent.addCategory(Intent.CATEGORY_OPENABLE);
+
+
+            launcher.launch(intent);
+        });
 
         final TextView textView = binding.textHome;
         homeViewModel.getText().observe(getViewLifecycleOwner(), textView::setText);
@@ -32,4 +80,13 @@ public class HomeFragment extends Fragment {
         super.onDestroyView();
         binding = null;
     }
+
+    private void handleSelectedNoteSheets(Uri... files) {
+        SongEditorDialog songEditorDialog = new SongEditorDialog();
+
+        int width = getResources().getDisplayMetrics().widthPixels;
+        
+
+        songEditorDialog.show(getParentFragmentManager(), "songEditorDialog");
+    }
 }

app/src/main/java/com/stormtales/notevault/ui/home/HomeViewModel.java

@@ -3,10 +3,13 @@ package com.stormtales.notevault.ui.home;
 import androidx.lifecycle.LiveData;
 import androidx.lifecycle.MutableLiveData;
 import androidx.lifecycle.ViewModel;
+import com.stormtales.notevault.data.entities.Song;
+import com.stormtales.notevault.data.repositories.SongRepository;
 
 public class HomeViewModel extends ViewModel {
 
     private final MutableLiveData<String> mText;
+    private SongRepository songRepository;
 
     public HomeViewModel() {
         mText = new MutableLiveData<>();
@@ -16,4 +19,8 @@ public class HomeViewModel extends ViewModel {
     public LiveData<String> getText() {
         return mText;
     }
+
+    public void addSong(Song song) {
+        songRepository.insert(song);
+    }
 }

app/src/main/java/com/stormtales/notevault/ui/songeditor/SongEditorDialog.java

@@ -0,0 +1,67 @@
+package com.stormtales.notevault.ui.songeditor;
+
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.os.Bundle;
+import android.text.Layout;
+import android.widget.Button;
+import android.widget.EditText;
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.fragment.app.DialogFragment;
+import androidx.fragment.app.Fragment;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import androidx.lifecycle.ViewModelProvider;
+import com.stormtales.notevault.R;
+import com.stormtales.notevault.data.entities.Song;
+import com.stormtales.notevault.ui.home.HomeViewModel;
+import org.jetbrains.annotations.NotNull;
+
+
+public class SongEditorDialog extends DialogFragment {
+
+    Dialog dialog;
+
+    public SongEditorDialog() {
+        // Required empty public constructor
+    }
+
+
+    @NonNull
+    @Override
+    public @NotNull Dialog onCreateDialog(@Nullable @org.jetbrains.annotations.Nullable Bundle savedInstanceState) {
+        LayoutInflater inflater = LayoutInflater.from(getContext());
+        View dialogView = inflater.inflate(R.layout.fragment_song_editor_dialog, null);
+
+        dialogView.findViewById(R.id.btnCancel).setOnClickListener(v-> onCancel());
+
+        AlertDialog.Builder builder = new AlertDialog.Builder(getContext());
+        builder.setCancelable(false);
+        builder.setView(dialogView);
+
+        dialog = builder.create();
+        dialog.setCanceledOnTouchOutside(false);
+        return dialog;
+    }
+
+    private void onCancel() {
+        dialog.dismiss();
+    }
+
+    private void onSave() {
+        String title = ((EditText) dialog.findViewById(R.id.etTitle)).getText().toString();
+        String composer = ((EditText) dialog.findViewById(R.id.etComposer)).getText().toString();
+        int releaseYear = Integer.parseInt(((EditText) dialog.findViewById(R.id.etYear)).getText().toString());
+        String genre = ((EditText) dialog.findViewById(R.id.etGenre)).getText().toString();
+
+        Song song = new Song(title, composer, genre, releaseYear);
+
+        HomeViewModel homeViewModel = new ViewModelProvider(requireActivity()).get(HomeViewModel.class);
+        homeViewModel.addSong(song);
+
+        dialog.dismiss();
+
+    }
+}

app/src/main/java/com/stormtales/notevault/utils/NoteSheetsUtil.java

@@ -0,0 +1,49 @@
+package com.stormtales.notevault.utils;
+
+import android.content.Context;
+import android.media.ExifInterface;
+import android.net.Uri;
+
+import java.io.File;
+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/com/stormtales/notevault/utils/UriTimestamp.java

@@ -0,0 +1,21 @@
+package com.stormtales.notevault.utils;
+
+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;
+    }
+}

app/src/main/res/layout/app_bar_main.xml

@@ -23,13 +23,4 @@
 
     <include layout="@layout/content_main"/>
 
-    <com.google.android.material.floatingactionbutton.FloatingActionButton
-            android:id="@+id/fab"
-            android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
-            android:layout_gravity="bottom|end"
-            android:layout_marginEnd="@dimen/fab_margin"
-            android:layout_marginBottom="16dp"
-            app:srcCompat="@android:drawable/ic_dialog_email"/>
-
 </androidx.coordinatorlayout.widget.CoordinatorLayout>

app/src/main/res/layout/fragment_home.xml

@@ -7,6 +7,14 @@
         android:layout_height="match_parent"
         tools:context=".ui.home.HomeFragment">
 
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+            android:src="@android:drawable/ic_input_add"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:clickable="true" android:id="@+id/addSongBtn"
+            app:layout_constraintBottom_toBottomOf="parent"
+            android:layout_marginBottom="16dp" android:layout_marginEnd="16dp"
+            app:layout_constraintEnd_toEndOf="parent" android:accessibilityPaneTitle="Add a Song"/>
     <TextView
             android:id="@+id/text_home"
             android:layout_width="match_parent"

app/src/main/res/layout/fragment_song_editor_dialog.xml

@@ -0,0 +1,122 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+              android:layout_width="match_parent"
+              android:layout_height="wrap_content"
+              android:orientation="vertical"
+              android:padding="24dp"
+              android:background="?android:attr/windowBackground">
+
+    <!-- Titel des Songs -->
+    <TextView
+            android:id="@+id/tvTitle"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Song Title"
+            android:textSize="16sp"
+            android:textColor="#000000"
+            android:paddingBottom="8dp"
+            android:fontFamily="sans-serif-medium"/>
+
+    <EditText
+            android:id="@+id/etTitle"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="Enter Song Title"
+            android:inputType="text"
+            android:padding="12dp"
+            android:layout_marginBottom="16dp"
+            android:backgroundTint="@color/light_blue_600"/>
+
+    <!-- Komponist -->
+    <TextView
+            android:id="@+id/tvComposer"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Composer"
+            android:textSize="16sp"
+            android:textColor="#000000"
+            android:paddingBottom="8dp"
+            android:fontFamily="sans-serif-medium"/>
+
+    <EditText
+            android:id="@+id/etComposer"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="Enter Composer"
+            android:inputType="text"
+            android:padding="12dp"
+            android:layout_marginBottom="16dp"
+            android:backgroundTint="@color/light_blue_600"/>
+
+    <!-- Erscheinungsjahr -->
+    <TextView
+            android:id="@+id/tvYear"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Release Year"
+            android:textSize="16sp"
+            android:textColor="#000000"
+            android:paddingBottom="8dp"
+            android:fontFamily="sans-serif-medium"/>
+
+    <EditText
+            android:id="@+id/etYear"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="Enter Release Year"
+            android:inputType="number"
+            android:padding="12dp"
+            android:layout_marginBottom="16dp"
+            android:backgroundTint="@color/light_blue_600"/>
+
+    <!-- Genre -->
+    <TextView
+            android:id="@+id/tvGenre"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:text="Genre"
+            android:textSize="16sp"
+            android:textColor="#000000"
+            android:paddingBottom="8dp"
+            android:fontFamily="sans-serif-medium"/>
+
+    <EditText
+            android:id="@+id/etGenre"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:hint="Enter Genre"
+            android:inputType="text"
+            android:padding="12dp"
+            android:layout_marginBottom="16dp"
+            android:backgroundTint="@color/light_blue_600"/>
+
+    <!-- Buttons -->
+    <LinearLayout
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="horizontal"
+            android:gravity="end">
+
+        <Button
+                android:id="@+id/btnCancel"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="Cancel"
+                android:layout_marginEnd="8dp"
+                android:backgroundTint="@android:color/darker_gray"
+                android:textColor="@android:color/white"
+                android:paddingHorizontal="16dp"
+                android:paddingVertical="8dp" />
+
+        <Button
+                android:id="@+id/btnSave"
+                android:layout_width="wrap_content"
+                android:layout_height="wrap_content"
+                android:text="Save"
+                android:backgroundTint="@color/light_blue_600"
+                android:textColor="@android:color/white"
+                android:paddingHorizontal="16dp"
+                android:paddingVertical="8dp" />
+    </LinearLayout>
+
+</LinearLayout>

app/src/main/res/values/colors.xml

@@ -7,4 +7,8 @@
     <color name="teal_700">#FF018786</color>
     <color name="black">#FF000000</color>
     <color name="white">#FFFFFFFF</color>
+    <color name="light_blue_400">#FF29B6F6</color>
+    <color name="light_blue_600">#FF039BE5</color>
+    <color name="gray_400">#FFBDBDBD</color>
+    <color name="gray_600">#FF757575</color>
 </resources>

app/src/main/res/values/strings.xml

@@ -10,4 +10,6 @@
     <string name="menu_home">Home</string>
     <string name="menu_gallery">Gallery</string>
     <string name="menu_slideshow">Slideshow</string>
+    <!-- TODO: Remove or change this placeholder text -->
+    <string name="hello_blank_fragment">Hello blank fragment</string>
 </resources>