Merge branch 'master' into 354-password-protection

app/src/main/java/it/niedermann/owncloud/notes/android/AlwaysAutoCompleteTextView.java

@@ -30,10 +30,7 @@ public class AlwaysAutoCompleteTextView extends AppCompatAutoCompleteTextView {
 
     @Override
     public void setThreshold(int threshold) {
-        if (threshold < 0) {
+        myThreshold = Math.max(threshold, 0);
-            threshold = 0;
-        }
-        myThreshold = threshold;
     }
 
     @Override

app/src/main/java/it/niedermann/owncloud/notes/android/MultiSelectedActionModeCallback.java

@@ -71,7 +71,7 @@ public class MultiSelectedActionModeCallback implements Callback {
     @Override
     public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
         switch (item.getItemId()) {
-            case R.id.menu_delete: {
+            case R.id.menu_delete:
                 try {
                     SingleSignOnAccount ssoAccount = SingleAccountHelper.getCurrentSingleSignOnAccount(context);
                     List<DBNote> deletedNotes = new ArrayList<>();
@@ -106,14 +106,13 @@ public class MultiSelectedActionModeCallback implements Callback {
                     e.printStackTrace();
                 }
                 return true;
-            }
+            case R.id.menu_move:
-            case R.id.menu_move: {
                 AccountChooserDialogFragment.newInstance().show(fragmentManager, NotesListViewActivity.class.getCanonicalName());
                 return true;
-            }
+            default:
-        }
                 return false;
         }
+    }
 
     @Override
     public void onDestroyActionMode(ActionMode mode) {

app/src/main/java/it/niedermann/owncloud/notes/android/NotesListViewItemTouchHelper.java

@@ -60,7 +60,7 @@ public class NotesListViewItemTouchHelper extends ItemTouchHelper {
             @Override
             public void onSwiped(@NonNull RecyclerView.ViewHolder viewHolder, int direction) {
                 switch (direction) {
-                    case ItemTouchHelper.LEFT: {
+                    case ItemTouchHelper.LEFT:
                         final DBNote dbNoteWithoutContent = (DBNote) adapter.getItem(viewHolder.getAdapterPosition());
                         final DBNote dbNote = db.getNote(dbNoteWithoutContent.getAccountId(), dbNoteWithoutContent.getId());
                         db.deleteNoteAndSync(ssoAccount, dbNote.getId());
@@ -77,13 +77,13 @@ public class NotesListViewItemTouchHelper extends ItemTouchHelper {
                                 })
                                 .show();
                         break;
-                    }
+                    case ItemTouchHelper.RIGHT:
-                    case ItemTouchHelper.RIGHT: {
+                        final DBNote adapterNote = (DBNote) adapter.getItem(viewHolder.getAdapterPosition());
-                        final DBNote dbNote = (DBNote) adapter.getItem(viewHolder.getAdapterPosition());
+                        db.toggleFavorite(ssoAccount, adapterNote, syncCallBack);
-                        db.toggleFavorite(ssoAccount, dbNote, syncCallBack);
                         refreshLists.run();
                         break;
-                    }
+                    default:
+                        //NoOp
                 }
             }
 

app/src/main/java/it/niedermann/owncloud/notes/android/activity/EditNoteActivity.java

@@ -157,7 +157,7 @@ public class EditNoteActivity extends LockedActivity implements BaseNoteFragment
         String category = null;
         boolean favorite = false;
         if (intent.hasExtra(PARAM_CATEGORY)) {
-            Category categoryPreselection = (Category) intent.getSerializableExtra(PARAM_CATEGORY);
+            Category categoryPreselection = (Category) Objects.requireNonNull(intent.getSerializableExtra(PARAM_CATEGORY));
             category = categoryPreselection.category;
             favorite = categoryPreselection.favorite != null ? categoryPreselection.favorite : false;
         }

app/src/main/java/it/niedermann/owncloud/notes/android/activity/ExceptionActivity.java

@@ -11,6 +11,8 @@ import androidx.annotation.Nullable;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 
+import java.util.Objects;
+
 import it.niedermann.nextcloud.exception.ExceptionUtil;
 import it.niedermann.owncloud.notes.R;
 
@@ -18,8 +20,6 @@ import static it.niedermann.nextcloud.exception.ExceptionHandler.KEY_THROWABLE;
 
 public class ExceptionActivity extends AppCompatActivity {
 
-    Throwable throwable;
-
     private TextView stacktrace;
 
     @SuppressLint("SetTextI18n") // only used for logging
@@ -38,7 +38,7 @@ public class ExceptionActivity extends AppCompatActivity {
         findViewById(R.id.close).setOnClickListener((v) -> close());
 
         setSupportActionBar(toolbar);
-        throwable = ((Throwable) getIntent().getSerializableExtra(KEY_THROWABLE));
+        Throwable throwable = (Throwable) Objects.requireNonNull(getIntent().getSerializableExtra(KEY_THROWABLE));
         throwable.printStackTrace();
         toolbar.setTitle(getString(R.string.simple_error));
         message.setText(throwable.getMessage());
@@ -46,14 +46,14 @@ public class ExceptionActivity extends AppCompatActivity {
     }
 
 
-    void copyStacktraceToClipboard() {
+    private void copyStacktraceToClipboard() {
-        final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
+        final ClipboardManager clipboardManager = (ClipboardManager) Objects.requireNonNull(getSystemService(CLIPBOARD_SERVICE));
         ClipData clipData = ClipData.newPlainText(getString(R.string.simple_exception), "```\n" + this.stacktrace.getText() + "\n```");
         clipboardManager.setPrimaryClip(clipData);
         Toast.makeText(this, R.string.copied_to_clipboard, Toast.LENGTH_SHORT).show();
     }
 
-    void close() {
+    private void close() {
         finish();
     }
 }

app/src/main/java/it/niedermann/owncloud/notes/android/activity/NoteListWidgetConfigurationActivity.java

@@ -35,10 +35,11 @@ public class NoteListWidgetConfigurationActivity extends LockedActivity {
     private int appWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID;
 
 
-    LocalAccount localAccount = null;
+    private LocalAccount localAccount = null;
 
     private NavigationAdapter adapterCategories;
-    private NavigationAdapter.NavigationItem itemRecent, itemFavorites;
+    private NavigationAdapter.NavigationItem itemRecent;
+    private NavigationAdapter.NavigationItem itemFavorites;
     private NotesDatabase db = null;
 
     @Override
@@ -144,7 +145,9 @@ public class NoteListWidgetConfigurationActivity extends LockedActivity {
             }
 
             Map<String, Integer> favorites = db.getFavoritesCount(localAccount.getId());
+            //noinspection ConstantConditions
             int numFavorites = favorites.containsKey("1") ? favorites.get("1") : 0;
+            //noinspection ConstantConditions
             int numNonFavorites = favorites.containsKey("0") ? favorites.get("0") : 0;
             itemFavorites.count = numFavorites;
             itemRecent.count = numFavorites + numNonFavorites;

app/src/main/java/it/niedermann/owncloud/notes/android/activity/NotesListViewActivity.java

@@ -106,7 +106,9 @@ public class NotesListViewActivity extends LockedActivity implements ItemAdapter
 
     private ActionBarDrawerToggle drawerToggle;
     private NavigationAdapter adapterCategories;
-    private NavigationItem itemRecent, itemFavorites, itemUncategorized;
+    private NavigationItem itemRecent;
+    private NavigationItem itemFavorites;
+    private NavigationItem itemUncategorized;
     private Category navigationSelection = new Category(null, null);
     private String navigationOpen = "";
     private ActionMode mActionMode;
@@ -412,7 +414,9 @@ public class NotesListViewActivity extends LockedActivity implements ItemAdapter
             }
 
             Map<String, Integer> favorites = db.getFavoritesCount(localAccount.getId());
+            //noinspection ConstantConditions
             int numFavorites = favorites.containsKey("1") ? favorites.get("1") : 0;
+            //noinspection ConstantConditions
             int numNonFavorites = favorites.containsKey("0") ? favorites.get("0") : 0;
             itemFavorites.count = numFavorites;
             itemRecent.count = numFavorites + numNonFavorites;
@@ -420,7 +424,8 @@ public class NotesListViewActivity extends LockedActivity implements ItemAdapter
             ArrayList<NavigationItem> items = new ArrayList<>();
             items.add(itemRecent);
             items.add(itemFavorites);
-            NavigationItem lastPrimaryCategory = null, lastSecondaryCategory = null;
+            NavigationItem lastPrimaryCategory = null;
+            NavigationItem lastSecondaryCategory = null;
             for (NavigationItem item : categories) {
                 int slashIndex = item.label.indexOf('/');
                 String currentPrimaryCategory = slashIndex < 0 ? item.label : item.label.substring(0, slashIndex);

app/src/main/java/it/niedermann/owncloud/notes/android/appwidget/NoteListWidget.java

@@ -154,8 +154,8 @@ public class NoteListWidget extends AppWidgetProvider {
                 } else {
                     return category;
                 }
-        }
+            default:
-
                 return null;
         }
+    }
 }

app/src/main/java/it/niedermann/owncloud/notes/android/appwidget/NoteListWidgetFactory.java

@@ -64,7 +64,7 @@ public class NoteListWidgetFactory implements RemoteViewsService.RemoteViewsFact
 
     @Override
     public void onDestroy() {
-
+        //NoOp
     }
 
     /**

app/src/main/java/it/niedermann/owncloud/notes/android/appwidget/SingleNoteWidgetFactory.java

@@ -70,7 +70,7 @@ public class SingleNoteWidgetFactory implements RemoteViewsService.RemoteViewsFa
 
     @Override
     public void onDestroy() {
-
+        //NoOp
     }
 
     /**

app/src/main/java/it/niedermann/owncloud/notes/android/fragment/BaseNoteFragment.java

@@ -61,7 +61,7 @@ public abstract class BaseNoteFragment extends Fragment implements CategoryDialo
     protected NotesDatabase db;
     private NoteFragmentListener listener;
 
-    boolean isNew = true;
+    protected boolean isNew = true;
 
     @Override
     public void onCreate(@Nullable Bundle savedInstanceState) {
@@ -146,7 +146,7 @@ public abstract class BaseNoteFragment extends Fragment implements CategoryDialo
     public void onCreateOptionsMenu(@NonNull Menu menu, MenuInflater inflater) {
         inflater.inflate(R.menu.menu_note_fragment, menu);
 
-        if (isRequestPinShortcutSupported(requireActivity()) && android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+        if (isRequestPinShortcutSupported(requireActivity()) && Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             menu.add(Menu.NONE, MENU_ID_PIN, 110, R.string.pin_to_homescreen);
         }
     }
@@ -198,8 +198,8 @@ public abstract class BaseNoteFragment extends Fragment implements CategoryDialo
                 Intent shareIntent = new Intent();
                 shareIntent.setAction(Intent.ACTION_SEND);
                 shareIntent.setType("text/plain");
-                shareIntent.putExtra(android.content.Intent.EXTRA_SUBJECT, note.getTitle());
+                shareIntent.putExtra(Intent.EXTRA_SUBJECT, note.getTitle());
-                shareIntent.putExtra(android.content.Intent.EXTRA_TEXT, note.getContent());
+                shareIntent.putExtra(Intent.EXTRA_TEXT, note.getContent());
 
 
                 if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
@@ -211,7 +211,7 @@ public abstract class BaseNoteFragment extends Fragment implements CategoryDialo
 
                 return false;
             case MENU_ID_PIN:
-                if (android.os.Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
                     ShortcutManager shortcutManager = requireActivity().getSystemService(ShortcutManager.class);
 
                     if (shortcutManager != null) {
@@ -274,7 +274,8 @@ public abstract class BaseNoteFragment extends Fragment implements CategoryDialo
         }
     }
 
-    float getFontSizeFromPreferences(SharedPreferences sp) {
+    @SuppressWarnings("WeakerAccess") //PMD...
+    protected float getFontSizeFromPreferences(SharedPreferences sp) {
         final String prefValueSmall = getString(R.string.pref_value_font_size_small);
         final String prefValueMedium = getString(R.string.pref_value_font_size_medium);
         // final String prefValueLarge = getString(R.string.pref_value_font_size_large);

app/src/main/java/it/niedermann/owncloud/notes/android/fragment/CategoryAdapter.java

@@ -48,25 +48,23 @@ public class CategoryAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolde
         CategoryViewHolder categoryViewHolder = (CategoryViewHolder) holder;
 
         switch (category.id) {
-            case addItemId: {
+            case addItemId:
                 Drawable wrapDrawable = DrawableCompat.wrap(context.getResources().getDrawable(category.icon));
                 DrawableCompat.setTint(wrapDrawable, context.getResources().getColor(R.color.icon_color_default));
                 categoryViewHolder.getIcon().setImageDrawable(wrapDrawable);
                 categoryViewHolder.getCategoryWrapper().setOnClickListener((v) -> listener.onCategoryAdded());
                 break;
-            }
+            case clearItemId:
-            case clearItemId: {
                 categoryViewHolder.getIcon().setImageDrawable(context.getResources().getDrawable(category.icon));
                 categoryViewHolder.getCategoryWrapper().setOnClickListener((v) -> listener.onCategoryCleared());
                 break;
-            }
+            default:
-            default: {
                 categoryViewHolder.getIcon().setImageDrawable(context.getResources().getDrawable(category.icon));
                 categoryViewHolder.getCategoryWrapper().setOnClickListener((v) -> listener.onCategoryChosen(category.label));
-            }
+                break;
         }
         categoryViewHolder.getCategory().setText(NoteUtil.extendCategory(category.label));
-        if (category.count > 0) {
+        if (category.count != null && category.count > 0) {
             categoryViewHolder.getCount().setText(String.valueOf(category.count));
         } else {
             categoryViewHolder.getCount().setVisibility(View.GONE);

app/src/main/java/it/niedermann/owncloud/notes/android/fragment/CategoryDialogFragment.java

@@ -61,7 +61,7 @@ public class CategoryDialogFragment extends AppCompatDialogFragment {
     @Override
     public void onAttach(@NonNull Context context) {
         super.onAttach(context);
-        if (requireArguments() != null && requireArguments().containsKey(PARAM_ACCOUNT_ID)) {
+        if (getArguments() != null && requireArguments().containsKey(PARAM_ACCOUNT_ID)) {
             accountId = requireArguments().getLong(PARAM_ACCOUNT_ID);
         } else {
             throw new IllegalArgumentException("Provide at least \"" + PARAM_ACCOUNT_ID + "\"");
@@ -151,7 +151,7 @@ public class CategoryDialogFragment extends AppCompatDialogFragment {
         super.onActivityCreated(savedInstanceState);
         if (editCategory.getText() == null || editCategory.getText().length() == 0) {
             editCategory.requestFocus();
-            if (getDialog().getWindow() != null) {
+            if (getDialog() != null && getDialog().getWindow() != null) {
                 getDialog().getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_VISIBLE);
             } else {
                 Log.w(TAG, "can not set SOFT_INPUT_STATE_ALWAYAS_VISIBLE because getWindow() == null");

app/src/main/java/it/niedermann/owncloud/notes/android/fragment/NoteEditFragment.java

@@ -51,7 +51,8 @@ public class NoteEditFragment extends SearchableBaseNoteFragment {
     private FragmentNoteEditBinding binding;
 
     private Handler handler;
-    private boolean saveActive, unsavedEdit;
+    private boolean saveActive;
+    private boolean unsavedEdit;
     private final Runnable runAutoSave = new Runnable() {
         @Override
         public void run() {

app/src/main/java/it/niedermann/owncloud/notes/android/fragment/NotePreviewFragment.java

@@ -94,7 +94,7 @@ public class NotePreviewFragment extends SearchableBaseNoteFragment implements O
 
     @Nullable
     @Override
-    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup
             container, @Nullable Bundle savedInstanceState) {
         binding = FragmentNotePreviewBinding.inflate(inflater, container, false);
         return binding.getRoot();

app/src/main/java/it/niedermann/owncloud/notes/android/fragment/NoteReadonlyFragment.java

@@ -87,7 +87,7 @@ public class NoteReadonlyFragment extends SearchableBaseNoteFragment {
 
     @Nullable
     @Override
-    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup
+    public View onCreateView(@NonNull LayoutInflater inflater, @Nullable ViewGroup
             container, @Nullable Bundle savedInstanceState) {
         binding = FragmentNotePreviewBinding.inflate(inflater, container, false);
         return binding.getRoot();

app/src/main/java/it/niedermann/owncloud/notes/android/fragment/PreferencesFragment.java

@@ -42,8 +42,8 @@ public class PreferencesFragment extends PreferenceFragmentCompat {
         assert themePref != null;
         themePref.setOnPreferenceChangeListener((preference, newValue) -> {
             Notes.setAppTheme(DarkModeSetting.valueOf((String) newValue));
-            getActivity().setResult(Activity.RESULT_OK);
+            requireActivity().setResult(Activity.RESULT_OK);
-            getActivity().recreate();
+            requireActivity().recreate();
             return true;
         });
 
@@ -58,7 +58,7 @@ public class PreferencesFragment extends PreferenceFragmentCompat {
         assert syncPref != null;
         syncPref.setOnPreferenceChangeListener((preference, newValue) -> {
             Log.v(TAG, "syncPref: " + preference + " - newValue: " + newValue);
-            SyncWorker.update(getContext(), newValue.toString());
+            SyncWorker.update(requireContext(), newValue.toString());
             return true;
         });
     }

app/src/main/java/it/niedermann/owncloud/notes/android/fragment/SearchableBaseNoteFragment.java

@@ -172,22 +172,13 @@ public abstract class SearchableBaseNoteFragment extends BaseNoteFragment {
         Layout layout = getLayout();
         if (layout == null) {
             Log.w(TAG, "getLayout() is null");
-            return;
+        } else if (getContent() == null || getContent().isEmpty()) {
-        }
+            Log.w(TAG, "getContent is null or empty");
-        if (getContent() == null || getContent().isEmpty()) {
+        } else if (currentOccurrence < 1) {
-            Log.w(TAG, "getContent() returned " + getContent());
-            return;
-        }
-        if (searchQuery == null || searchQuery.isEmpty()) {
-            // No search term
-            return;
-        }
-        if (currentOccurrence < 1) {
             // if currentOccurrence is lower than 1, jump to last occurrence
             currentOccurrence = occurrenceCount;
             jumpToOccurrence();
-            return;
+        } else if (searchQuery != null && !searchQuery.isEmpty()) {
-        }
             String currentContent = getContent().toLowerCase();
             int indexOfNewText = indexOfNth(currentContent, searchQuery.toLowerCase(), 0, currentOccurrence);
             if (indexOfNewText <= 0) {
@@ -206,6 +197,7 @@ public abstract class SearchableBaseNoteFragment extends BaseNoteFragment {
                 getScrollView().smoothScrollTo(0, layout.getLineTop(numberLine));
             }
         }
+    }
 
     private static int indexOfNth(String input, String value, int startIndex, int nth) {
         if (nth < 1)
@@ -215,20 +207,18 @@ public abstract class SearchableBaseNoteFragment extends BaseNoteFragment {
         int idx = input.indexOf(value, startIndex);
         if (idx == -1)
             return -1;
-        return indexOfNth(input, value, idx + 1, --nth);
+        return indexOfNth(input, value, idx + 1, nth - 1);
     }
 
     private static int countOccurrences(String haystack, String needle) {
         if (haystack == null || haystack.isEmpty() || needle == null || needle.isEmpty()) {
             return 0;
         }
-        haystack = haystack.toLowerCase();
-        needle = needle.toLowerCase();
         int lastIndex = 0;
         int count = 0;
 
         while (lastIndex != -1) {
-            lastIndex = haystack.indexOf(needle, lastIndex);
+            lastIndex = haystack.toLowerCase().indexOf(needle.toLowerCase(), lastIndex);
             if (lastIndex != -1) {
                 count++;
                 lastIndex += needle.length();

app/src/main/java/it/niedermann/owncloud/notes/android/fragment/about/AboutFragmentLicenseTab.java

@@ -16,7 +16,7 @@ import it.niedermann.owncloud.notes.util.SupportUtil;
 
 public class AboutFragmentLicenseTab extends Fragment {
 
-    void openLicense() {
+    private void openLicense() {
         startActivity(new Intent(Intent.ACTION_VIEW, Uri.parse(getString(R.string.url_license))));
     }
 

app/src/main/java/it/niedermann/owncloud/notes/model/CloudNote.java

@@ -14,9 +14,9 @@ import it.niedermann.owncloud.notes.util.NoteUtil;
  * It can be directly generated from the JSON answer from the server.
  */
 public class CloudNote implements Serializable {
-    private long remoteId = 0;
+    private long remoteId;
     private String title = "";
-    private Calendar modified = null;
+    private Calendar modified;
     private String content = "";
     private boolean favorite = false;
     private String category = "";
@@ -51,7 +51,6 @@ public class CloudNote implements Serializable {
         this.title = NoteUtil.removeMarkDown(title);
     }
 
-    @SuppressWarnings("WeakerAccess")
     public Calendar getModified() {
         return modified;
     }

app/src/main/java/it/niedermann/owncloud/notes/model/NavigationAdapter.java

@@ -57,9 +57,6 @@ public class NavigationAdapter extends RecyclerView.Adapter<NavigationAdapter.Vi
         @NonNull
         private final View view;
 
-        @NonNull
-        private final ItemNavigationBinding binding;
-
         @NonNull
         private final TextView name;
         @NonNull
@@ -72,7 +69,7 @@ public class NavigationAdapter extends RecyclerView.Adapter<NavigationAdapter.Vi
         ViewHolder(@NonNull View itemView, @NonNull final ClickListener clickListener) {
             super(itemView);
             view = itemView;
-            binding = ItemNavigationBinding.bind(view);
+            ItemNavigationBinding binding = ItemNavigationBinding.bind(view);
             this.name = binding.navigationItemLabel;
             this.count = binding.navigationItemCount;
             this.icon = binding.navigationItemIcon;
@@ -80,7 +77,7 @@ public class NavigationAdapter extends RecyclerView.Adapter<NavigationAdapter.Vi
             itemView.setOnClickListener(view -> clickListener.onItemClick(currentItem));
         }
 
-        void assignItem(@NonNull NavigationItem item) {
+        private void assignItem(@NonNull NavigationItem item) {
             currentItem = item;
             boolean isSelected = item.id.equals(selectedItem);
             name.setText(NoteUtil.extendCategory(item.label));

app/src/main/java/it/niedermann/owncloud/notes/persistence/AbstractNotesDatabase.java

@@ -32,6 +32,7 @@ abstract class AbstractNotesDatabase extends SQLiteOpenHelper {
     private static final String TAG = AbstractNotesDatabase.class.getSimpleName();
 
     private static final int database_version = 11;
+    @NonNull
     private final Context context;
 
     protected static final String database_name = "OWNCLOUD_NOTES";
@@ -55,12 +56,13 @@ abstract class AbstractNotesDatabase extends SQLiteOpenHelper {
     protected static final String key_category = "CATEGORY";
     protected static final String key_etag = "ETAG";
 
-    protected AbstractNotesDatabase(@Nullable Context context, @Nullable String name, @Nullable SQLiteDatabase.CursorFactory factory) {
+    protected AbstractNotesDatabase(@NonNull Context context, @Nullable String name, @Nullable SQLiteDatabase.CursorFactory factory) {
         super(context, name, factory, database_version);
         this.context = context;
     }
 
 
+    @NonNull
     public Context getContext() {
         return context;
     }

app/src/main/java/it/niedermann/owncloud/notes/persistence/LoadNotesListTask.java

@@ -103,7 +103,7 @@ public class LoadNotesListTask extends AsyncTask<Void, Void, List<Item>> {
         for (int i = 0; i < noteList.size(); i++) {
             DBNote currentNote = noteList.get(i);
             String timeslot = timeslotter.getTimeslot(currentNote);
-            if(i > 0 && !timeslot.equals(lastTimeslot)) {
+            if (i > 0 && !timeslot.equals(lastTimeslot)) {
                 itemList.add(new SectionItem(timeslot));
             }
             itemList.add(colorTheNote(currentNote));
@@ -132,16 +132,16 @@ public class LoadNotesListTask extends AsyncTask<Void, Void, List<Item>> {
             int day = now.get(Calendar.DAY_OF_MONTH);
             int offsetWeekStart = (now.get(Calendar.DAY_OF_WEEK) - now.getFirstDayOfWeek() + 7) % 7;
             timeslots.add(new Timeslot(context.getResources().getString(R.string.listview_updated_today), month, day));
-            timeslots.add(new Timeslot(context.getResources().getString(R.string.listview_updated_yesterday), month,day - 1));
+            timeslots.add(new Timeslot(context.getResources().getString(R.string.listview_updated_yesterday), month, day - 1));
-            timeslots.add(new Timeslot(context.getResources().getString(R.string.listview_updated_this_week), month,day - offsetWeekStart));
+            timeslots.add(new Timeslot(context.getResources().getString(R.string.listview_updated_this_week), month, day - offsetWeekStart));
-            timeslots.add(new Timeslot(context.getResources().getString(R.string.listview_updated_last_week), month,day - offsetWeekStart - 7));
+            timeslots.add(new Timeslot(context.getResources().getString(R.string.listview_updated_last_week), month, day - offsetWeekStart - 7));
-            timeslots.add(new Timeslot(context.getResources().getString(R.string.listview_updated_this_month), month,1));
+            timeslots.add(new Timeslot(context.getResources().getString(R.string.listview_updated_this_month), month, 1));
             timeslots.add(new Timeslot(context.getResources().getString(R.string.listview_updated_last_month), month - 1, 1));
             lastYear = Calendar.getInstance();
             lastYear.set(now.get(Calendar.YEAR) - 1, 0, 1, 0, 0, 0);
         }
 
-        String getTimeslot(DBNote note) {
+        private String getTimeslot(DBNote note) {
             if (note.isFavorite()) {
                 return "";
             }
@@ -160,8 +160,8 @@ public class LoadNotesListTask extends AsyncTask<Void, Void, List<Item>> {
         }
 
         private class Timeslot {
-            final String label;
+            private final String label;
-            final Calendar time;
+            private final Calendar time;
 
             Timeslot(String label, int month, int day) {
                 this.label = label;

app/src/main/java/it/niedermann/owncloud/notes/persistence/NoteServerSyncHelper.java

@@ -295,7 +295,7 @@ public class NoteServerSyncHelper {
             this.onlyLocalChanges = onlyLocalChanges;
         }
 
-        void addCallbacks(SingleSignOnAccount ssoAccount, List<ISyncCallback> callbacks) {
+        private void addCallbacks(SingleSignOnAccount ssoAccount, List<ISyncCallback> callbacks) {
             this.callbacks.put(ssoAccount.name, callbacks);
         }
 

app/src/main/java/it/niedermann/owncloud/notes/persistence/NotesDatabase.java

@@ -59,7 +59,7 @@ public class NotesDatabase extends AbstractNotesDatabase {
 
     private final NoteServerSyncHelper serverSyncHelper;
 
-    private NotesDatabase(Context context) {
+    private NotesDatabase(@NonNull Context context) {
         super(context, database_name, null);
         serverSyncHelper = NoteServerSyncHelper.getInstance(this);
     }
@@ -128,7 +128,7 @@ public class NotesDatabase extends AbstractNotesDatabase {
         deleteNoteAndSync(ssoAccount, note.getId());
 
         notifyNotesChanged();
-        getNoteServerSyncHelper().scheduleSync(ssoAccount,true);
+        getNoteServerSyncHelper().scheduleSync(ssoAccount, true);
     }
 
     /**
@@ -389,7 +389,7 @@ public class NotesDatabase extends AbstractNotesDatabase {
                 table_notes,
                 new String[]{key_category, "COUNT(*)"},
                 key_status + " != ? AND " + key_account_id + " = ? AND " + key_category + " LIKE ? AND " + key_category + " != \"\"",
-                new String[]{DBStatus.LOCAL_DELETED.getTitle(), String.valueOf(accountId), "%" + (search == null ? search : search.trim()) + "%"},
+                new String[]{DBStatus.LOCAL_DELETED.getTitle(), String.valueOf(accountId), "%" + (search == null ? null : search.trim()) + "%"},
                 key_category,
                 null,
                 key_category);
@@ -436,7 +436,7 @@ public class NotesDatabase extends AbstractNotesDatabase {
         if (callback != null) {
             serverSyncHelper.addCallbackPush(ssoAccount, callback);
         }
-        serverSyncHelper.scheduleSync(ssoAccount,true);
+        serverSyncHelper.scheduleSync(ssoAccount, true);
     }
 
     /**
@@ -538,7 +538,7 @@ public class NotesDatabase extends AbstractNotesDatabase {
         SQLiteDatabase db = this.getWritableDatabase();
         ContentValues values = new ContentValues();
         values.put(key_status, DBStatus.LOCAL_DELETED.getTitle());
-        int i = db.update(table_notes,
+        db.update(table_notes,
                 values,
                 key_id + " = ?",
                 new String[]{String.valueOf(id)});

app/src/main/java/it/niedermann/owncloud/notes/persistence/SyncWorker.java

@@ -16,6 +16,7 @@ import com.nextcloud.android.sso.AccountImporter;
 import com.nextcloud.android.sso.exceptions.NextcloudFilesAppAccountNotFoundException;
 import com.nextcloud.android.sso.model.SingleSignOnAccount;
 
+import java.util.Objects;
 import java.util.concurrent.TimeUnit;
 
 import it.niedermann.owncloud.notes.R;
@@ -23,7 +24,7 @@ import it.niedermann.owncloud.notes.model.LocalAccount;
 
 public class SyncWorker extends Worker {
 
-    private static final String TAG = SyncWorker.class.getCanonicalName();
+    private static final String TAG = Objects.requireNonNull(SyncWorker.class.getCanonicalName());
     private static final String WORKER_TAG = "background_synchronization";
 
     private static final Constraints constraints = new Constraints.Builder()

app/src/main/java/it/niedermann/owncloud/notes/util/ClipboardUtil.java

@@ -26,7 +26,7 @@ public class ClipboardUtil {
             try {
                 clipboardURL = new URL(clipboardData.getItemAt(0).getText().toString()).toString();
             } catch (MalformedURLException e) {
-                Log.d(TAG, "Clipboard does not contain a valid URL: " + clipboardURL);
+                Log.d(TAG, "Clipboard does not contain a valid URL: " + clipboardData.getItemAt(0).getText().toString());
             }
         }
         return clipboardURL;

app/src/main/java/it/niedermann/owncloud/notes/util/NoteUtil.java

@@ -37,13 +37,14 @@ public class NoteUtil {
     public static String removeMarkDown(@Nullable String s) {
         if (s == null)
             return "";
-        s = pLists.matcher(s).replaceAll("");
+        String result = s;
-        s = pHeadings.matcher(s).replaceAll("$1");
+        result = pLists.matcher(result).replaceAll("");
-        s = pHeadingLine.matcher(s).replaceAll("");
+        result = pHeadings.matcher(result).replaceAll("$1");
-        s = pEmphasis.matcher(s).replaceAll("$2");
+        result = pHeadingLine.matcher(result).replaceAll("");
-        s = pSpace1.matcher(s).replaceAll("");
+        result = pEmphasis.matcher(result).replaceAll("$2");
-        s = pSpace2.matcher(s).replaceAll("");
+        result = pSpace1.matcher(result).replaceAll("");
-        return s;
+        result = pSpace2.matcher(result).replaceAll("");
+        return result;
     }
 
     /**

app/src/main/java/it/niedermann/owncloud/notes/util/NotesTextWatcher.java

@@ -79,23 +79,17 @@ public abstract class NotesTextWatcher implements TextWatcher {
         // Find start of line
         int startOfLine = MarkDownUtil.getStartOfLine(s, start);
         String line = s.subSequence(startOfLine, start).toString();
-        if (line.startsWith(codeBlock)) {
         // "start" is the direct sibling of the codeBlock
-            if (start - startOfLine == codeBlock.length()) {
+        if (line.startsWith(codeBlock) && start - startOfLine == codeBlock.length() && !resetSelection) {
-                if (!resetSelection) {
             resetSelectionTo = editText.getSelectionEnd();
             resetSelection = true;
             Log.v(TAG, "Entered a character directly behind a codeBlock - prepare selection reset to " + resetSelectionTo);
-                }
+        } else if (s.subSequence(startOfLine, start + count).toString().startsWith(codeBlock) && !resetSelection) {
-            }
-        } else if (s.subSequence(startOfLine, start + count).toString().startsWith(codeBlock)) {
-            if (!resetSelection) {
             resetSelectionTo = editText.getSelectionEnd();
             resetSelection = true;
             Log.v(TAG, "One completed a ``-codeBlock with the third `-character - prepare selection reset to " + resetSelectionTo);
         }
     }
-    }
 
     private void setNewText(@NonNull StringBuilder newText, int selection) {
         editText.setText(newText);

app/src/main/java/it/niedermann/owncloud/notes/util/format/ContextBasedFormattingCallback.java

@@ -59,17 +59,16 @@ public class ContextBasedFormattingCallback implements ActionMode.Callback {
     @Override
     public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
         switch (item.getItemId()) {
-            case R.id.checkbox: {
+            case R.id.checkbox:
                 insertCheckbox();
                 return true;
-            }
+            case R.id.link:
-            case R.id.link: {
                 insertLink();
                 return true;
-            }
+            default:
-        }
                 return false;
         }
+    }
 
     private void insertCheckbox() {
         CharSequence text = editText.getText();

app/src/main/java/it/niedermann/owncloud/notes/util/format/ContextBasedRangeFormattingCallback.java

@@ -62,7 +62,7 @@ public class ContextBasedRangeFormattingCallback implements ActionMode.Callback
 
 
         switch (item.getItemId()) {
-            case R.id.bold: {
+            case R.id.bold:
                 markdown = "**";
                 if (hasAlreadyMarkdown(start, end, markdown)) {
                     this.removeMarkdown(ssb, start, end, markdown);
@@ -72,8 +72,7 @@ public class ContextBasedRangeFormattingCallback implements ActionMode.Callback
                 editText.setText(ssb);
                 editText.setSelection(end + markdown.length() * 2);
                 return true;
-            }
+            case R.id.italic:
-            case R.id.italic: {
                 markdown = "*";
                 if (hasAlreadyMarkdown(start, end, markdown)) {
                     this.removeMarkdown(ssb, start, end, markdown);
@@ -83,8 +82,7 @@ public class ContextBasedRangeFormattingCallback implements ActionMode.Callback
                 editText.setText(ssb);
                 editText.setSelection(end + markdown.length() * 2);
                 return true;
-            }
+            case R.id.link:
-            case R.id.link: {
                 boolean textToFormatIsLink = TextUtils.indexOf(editText.getText().subSequence(start, end), "http") == 0;
                 if (textToFormatIsLink) {
                     ssb.insert(end, ")");
@@ -108,8 +106,7 @@ public class ContextBasedRangeFormattingCallback implements ActionMode.Callback
                     editText.setSelection(end + 2); // after <end>](
                 }
                 return true;
-            }
+            case android.R.id.cut:
-            case android.R.id.cut: {
                 // https://github.com/stefan-niedermann/nextcloud-notes/issues/604
                 // https://github.com/stefan-niedermann/nextcloud-notes/issues/477
                 try {
@@ -121,10 +118,10 @@ public class ContextBasedRangeFormattingCallback implements ActionMode.Callback
                     editText.clearFocus();
                     return true;
                 }
-            }
+            default:
-        }
                 return false;
         }
+    }
 
     @Override
     public void onDestroyActionMode(ActionMode mode) {
@@ -148,7 +145,6 @@ public class ContextBasedRangeFormattingCallback implements ActionMode.Callback
         ssb.insert(start, markdown);
         editText.getText().charAt(start);
         editText.getText().charAt(start + 1);
-        end += markdown.length() * 2;
+        ssb.setSpan(new StyleSpan(typeface), start, end + markdown.length() * 2, 1);
-        ssb.setSpan(new StyleSpan(typeface), start, end, 1);
     }
 }