Optionaly go back to folder list

app/src/main/java/eu/faircode/email/ActivityView.java

@@ -1829,6 +1829,17 @@ public class ActivityView extends ActivityBilling implements FragmentManager.OnB
         if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.STARTED))
             getSupportFragmentManager().popBackStack("messages", FragmentManager.POP_BACK_STACK_INCLUSIVE);
 
+        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
+        boolean foldernav = prefs.getBoolean("foldernav", false);
+        if (foldernav) {
+            long account = intent.getLongExtra("account", -1);
+            if (account > 0) {
+                if (getLifecycle().getCurrentState().isAtLeast(Lifecycle.State.STARTED))
+                    getSupportFragmentManager().popBackStack("unified", 0);
+                onMenuFolders(account);
+            }
+        }
+
         Bundle args = new Bundle();
         args.putString("type", intent.getStringExtra("type"));
         args.putLong("account", intent.getLongExtra("account", -1));

app/src/main/java/eu/faircode/email/FragmentOptionsBehavior.java

@@ -69,6 +69,7 @@ public class FragmentOptionsBehavior extends FragmentBase implements SharedPrefe
     private SwitchCompat swQuickScroll;
     private Button btnSwipes;
     private SeekBar sbSwipeSensitivity;
+    private SwitchCompat swFolderNav;
     private SwitchCompat swDoubleTap;
     private SwitchCompat swSwipeNav;
     private SwitchCompat swVolumeNav;
@@ -100,7 +101,7 @@ public class FragmentOptionsBehavior extends FragmentBase implements SharedPrefe
     private final static String[] RESET_OPTIONS = new String[]{
             "sync_on_launch", "double_back", "conversation_actions", "conversation_actions_replies", "language_detection",
             "default_snooze",
-            "pull", "autoscroll", "quick_filter", "quick_scroll", "swipe_sensitivity",
+            "pull", "autoscroll", "quick_filter", "quick_scroll", "swipe_sensitivity", "foldernav",
             "doubletap", "swipenav", "volumenav", "reversed", "swipe_close", "swipe_move",
             "autoexpand", "expand_first", "expand_all", "expand_one", "collapse_multiple",
             "autoclose", "onclose", "autoclose_unseen", "collapse_marked",
@@ -131,6 +132,7 @@ public class FragmentOptionsBehavior extends FragmentBase implements SharedPrefe
         swQuickScroll = view.findViewById(R.id.swQuickScroll);
         btnSwipes = view.findViewById(R.id.btnSwipes);
         sbSwipeSensitivity = view.findViewById(R.id.sbSwipeSensitivity);
+        swFolderNav = view.findViewById(R.id.swFolderNav);
         swDoubleTap = view.findViewById(R.id.swDoubleTap);
         swSwipeNav = view.findViewById(R.id.swSwipeNav);
         swVolumeNav = view.findViewById(R.id.swVolumeNav);
@@ -279,6 +281,13 @@ public class FragmentOptionsBehavior extends FragmentBase implements SharedPrefe
             }
         });
 
+        swFolderNav.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+            @Override
+            public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
+                prefs.edit().putBoolean("foldernav", checked).apply();
+            }
+        });
+
         swDoubleTap.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
             @Override
             public void onCheckedChanged(CompoundButton compoundButton, boolean checked) {
@@ -522,6 +531,8 @@ public class FragmentOptionsBehavior extends FragmentBase implements SharedPrefe
         int swipe_sensitivity = prefs.getInt("swipe_sensitivity", DEFAULT_SWIPE_SENSITIVITY);
         sbSwipeSensitivity.setProgress(swipe_sensitivity);
 
+        swFolderNav.setChecked(prefs.getBoolean("foldernav", false));
+
         swDoubleTap.setChecked(prefs.getBoolean("doubletap", true));
         swSwipeNav.setChecked(prefs.getBoolean("swipenav", true));
         swVolumeNav.setChecked(prefs.getBoolean("volumenav", false));

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

@@ -294,6 +294,17 @@
                     app:layout_constraintEnd_toEndOf="parent"
                     app:layout_constraintStart_toStartOf="parent"
                     app:layout_constraintTop_toBottomOf="@id/tvSwipeSensitivity" />
+
+                <androidx.appcompat.widget.SwitchCompat
+                    android:id="@+id/swFolderNav"
+                    android:layout_width="0dp"
+                    android:layout_height="wrap_content"
+                    android:layout_marginTop="12dp"
+                    android:text="@string/title_advanced_folder_nav"
+                    app:layout_constraintEnd_toEndOf="parent"
+                    app:layout_constraintStart_toStartOf="parent"
+                    app:layout_constraintTop_toBottomOf="@id/sbSwipeSensitivity"
+                    app:switchPadding="12dp" />
             </androidx.constraintlayout.widget.ConstraintLayout>
         </androidx.cardview.widget.CardView>
 

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

@@ -559,6 +559,7 @@
     <string name="title_advanced_undo">Undo timeout</string>
     <string name="title_advanced_quick_filter">Show non-obtrusive quick filter icons</string>
     <string name="title_advanced_quick_scroll">Show non-obtrusive quick scroll up/down icons</string>
+    <string name="title_advanced_folder_nav">Always go back to the folder list from a message list</string>
     <string name="title_advanced_autoread">Automatically mark messages read on moving messages</string>
     <string name="title_advanced_star_snoozed">Automatically add star on snoozing messages</string>
     <string name="title_advanced_autounstar">Automatically remove stars from messages on moving messages</string>