New option: Settings->Interface->Comment->Comment Divider Type.

app/src/main/java/ml/docilealligator/infinityforreddit/adapters/CommentsRecyclerViewAdapter.java

@@ -74,6 +74,9 @@ import ml.docilealligator.infinityforreddit.utils.Utils;
 import retrofit2.Retrofit;
 
 public class CommentsRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
+    public static final int DIVIDER_NORMAL = 0;
+    public static final int DIVIDER_PARENT = 1;
+
     private static final int VIEW_TYPE_FIRST_LOADING = 9;
     private static final int VIEW_TYPE_FIRST_LOADING_FAILED = 10;
     private static final int VIEW_TYPE_NO_COMMENT_PLACEHOLDER = 11;
@@ -107,6 +110,7 @@ public class CommentsRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVi
     private boolean mCommentToolbarHideOnClick;
     private boolean mSwapTapAndLong;
     private boolean mShowCommentDivider;
+    private int mDividerType;
     private boolean mShowAbsoluteNumberOfVotes;
     private boolean mFullyCollapseComment;
     private boolean mShowOnlyOneCommentLevelIndicator;
@@ -221,6 +225,7 @@ public class CommentsRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVi
         mCommentToolbarHideOnClick = sharedPreferences.getBoolean(SharedPreferencesUtils.COMMENT_TOOLBAR_HIDE_ON_CLICK, true);
         mSwapTapAndLong = sharedPreferences.getBoolean(SharedPreferencesUtils.SWAP_TAP_AND_LONG_COMMENTS, false);
         mShowCommentDivider = sharedPreferences.getBoolean(SharedPreferencesUtils.SHOW_COMMENT_DIVIDER, false);
+        mDividerType = Integer.parseInt(sharedPreferences.getString(SharedPreferencesUtils.COMMENT_DIVIDER_TYPE, "0"));
         mShowAbsoluteNumberOfVotes = sharedPreferences.getBoolean(SharedPreferencesUtils.SHOW_ABSOLUTE_NUMBER_OF_VOTES, true);
         mFullyCollapseComment = sharedPreferences.getBoolean(SharedPreferencesUtils.FULLY_COLLAPSE_COMMENT, false);
         mShowOnlyOneCommentLevelIndicator = sharedPreferences.getBoolean(SharedPreferencesUtils.SHOW_ONLY_ONE_COMMENT_LEVEL_INDICATOR, false);
@@ -525,6 +530,13 @@ public class CommentsRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVi
                 if (position == mSearchCommentIndex) {
                     holder.itemView.setBackgroundColor(Color.parseColor("#03A9F4"));
                 }
+
+                if (mShowCommentDivider) {
+                    if (mDividerType == DIVIDER_PARENT && comment.getDepth() == 0) {
+                        RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) holder.itemView.getLayoutParams();
+                        params.setMargins(0, (int) Utils.convertDpToPixel(16, mActivity), 0, 0);
+                    }
+                }
             }
         } else if (holder instanceof CommentFullyCollapsedViewHolder) {
             Comment comment = getCurrentComment(position);
@@ -574,6 +586,13 @@ public class CommentsRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVi
                 }
                 ((CommentFullyCollapsedViewHolder) holder).commentIndentationView.setShowOnlyOneDivider(mShowOnlyOneCommentLevelIndicator);
                 ((CommentFullyCollapsedViewHolder) holder).commentIndentationView.setLevelAndColors(comment.getDepth(), verticalBlockColors);
+
+                if (mShowCommentDivider) {
+                    if (mDividerType == DIVIDER_PARENT && comment.getDepth() == 0) {
+                        RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) holder.itemView.getLayoutParams();
+                        params.setMargins(0, (int) Utils.convertDpToPixel(16, mActivity), 0, 0);
+                    }
+                }
             }
         } else if (holder instanceof LoadMoreChildCommentsViewHolder) {
             Comment placeholder;
@@ -1128,6 +1147,8 @@ public class CommentsRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVi
             ((CommentViewHolder) holder).downvoteButton.setColorFilter(mCommentIconAndInfoColor, PorterDuff.Mode.SRC_IN);
             ((CommentViewHolder) holder).expandButton.setText("");
             ((CommentViewHolder) holder).replyButton.setColorFilter(mCommentIconAndInfoColor, PorterDuff.Mode.SRC_IN);
+            RecyclerView.LayoutParams params = (RecyclerView.LayoutParams) holder.itemView.getLayoutParams();
+            params.setMargins(0, 0, 0, 0);
         }
     }
 
@@ -1246,8 +1267,10 @@ public class CommentsRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVi
             }
 
             if (mShowCommentDivider) {
-                commentDivider.setBackgroundColor(mDividerColor);
+                if (mDividerType == DIVIDER_NORMAL) {
-                commentDivider.setVisibility(View.VISIBLE);
+                    commentDivider.setBackgroundColor(mDividerColor);
+                    commentDivider.setVisibility(View.VISIBLE);
+                }
             }
 
             if (mActivity.typeface != null) {
@@ -1749,8 +1772,10 @@ public class CommentsRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVi
             commentTimeTextView.setTextColor(mSecondaryTextColor);
 
             if (mShowCommentDivider) {
-                commentDivider.setBackgroundColor(mDividerColor);
+                if (mDividerType == DIVIDER_NORMAL) {
-                commentDivider.setVisibility(View.VISIBLE);
+                    commentDivider.setBackgroundColor(mDividerColor);
+                    commentDivider.setVisibility(View.VISIBLE);
+                }
             }
 
             if (mShowAuthorAvatar) {
@@ -1801,7 +1826,10 @@ public class CommentsRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVi
             ButterKnife.bind(this, itemView);
 
             if (mShowCommentDivider) {
-                commentDivider.setVisibility(View.VISIBLE);
+                if (mDividerType == DIVIDER_NORMAL) {
+                    commentDivider.setBackgroundColor(mDividerColor);
+                    commentDivider.setVisibility(View.VISIBLE);
+                }
             }
 
             if (mActivity.typeface != null) {
@@ -1809,7 +1837,6 @@ public class CommentsRecyclerViewAdapter extends RecyclerView.Adapter<RecyclerVi
             }
             itemView.setBackgroundColor(mCommentBackgroundColor);
             placeholderTextView.setTextColor(mPrimaryTextColor);
-            commentDivider.setBackgroundColor(mDividerColor);
         }
     }
 

app/src/main/java/ml/docilealligator/infinityforreddit/settings/CommentPreferenceFragment.java

@@ -3,7 +3,9 @@ package ml.docilealligator.infinityforreddit.settings;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 
+import androidx.preference.ListPreference;
 import androidx.preference.SeekBarPreference;
+import androidx.preference.SwitchPreference;
 
 import javax.inject.Inject;
 import javax.inject.Named;
@@ -25,8 +27,18 @@ public class CommentPreferenceFragment extends CustomFontPreferenceFragmentCompa
 
         ((Infinity) activity.getApplication()).getAppComponent().inject(this);
 
+        SwitchPreference showCommentDividerSwitchPreference = findPreference(SharedPreferencesUtils.SHOW_COMMENT_DIVIDER);
+        ListPreference commentDividerTypeListPreference = findPreference(SharedPreferencesUtils.COMMENT_DIVIDER_TYPE);
         SeekBarPreference showFewerToolbarOptionsThresholdSeekBarPreference = findPreference(SharedPreferencesUtils.SHOW_FEWER_TOOLBAR_OPTIONS_THRESHOLD);
 
+        if (showCommentDividerSwitchPreference != null && commentDividerTypeListPreference != null) {
+            commentDividerTypeListPreference.setVisible(sharedPreferences.getBoolean(SharedPreferencesUtils.SHOW_COMMENT_DIVIDER, false));
+            showCommentDividerSwitchPreference.setOnPreferenceChangeListener((preference, newValue) -> {
+                commentDividerTypeListPreference.setVisible((Boolean) newValue);
+                return true;
+            });
+        }
+
         if (showFewerToolbarOptionsThresholdSeekBarPreference != null) {
             showFewerToolbarOptionsThresholdSeekBarPreference.setSummary(getString(R.string.settings_show_fewer_toolbar_options_threshold_summary, sharedPreferences.getInt(SharedPreferencesUtils.SHOW_FEWER_TOOLBAR_OPTIONS_THRESHOLD, 5)));
 

app/src/main/java/ml/docilealligator/infinityforreddit/utils/SharedPreferencesUtils.java

@@ -215,6 +215,7 @@ public class SharedPreferencesUtils {
     public static final String REDDIT_VIDEO_DEFAULT_RESOLUTION = "reddit_video_default_resolution";
     public static final String EASIER_TO_WATCH_IN_FULL_SCREEN = "easier_to_watch_in_full_screen";
     public static final String HIDE_THE_NUMBER_OF_VOTES_IN_COMMENTS = "hide_the_number_of_votes_in_comments";
+    public static final String COMMENT_DIVIDER_TYPE = "comment_divider_type";
 
     public static final String DEFAULT_PREFERENCES_FILE = "ml.docilealligator.infinityforreddit_preferences";
     public static final String MAIN_PAGE_TABS_SHARED_PREFERENCES_FILE = "ml.docilealligator.infinityforreddit.main_page_tabs";

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

@@ -669,4 +669,14 @@
         <item>144</item>
     </string-array>
 
+    <string-array name="settings_comment_divider_type">
+        <item>Normal</item>
+        <item>Only on top-level comments</item>
+    </string-array>
+
+    <string-array name="settings_comment_divider_type_values">
+        <item>0</item>
+        <item>1</item>
+    </string-array>
+
 </resources>

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

@@ -647,6 +647,7 @@
     <string name="settings_reddit_video_default_resolution">Reddit Video Default Resolution</string>
     <string name="settings_easier_to_watch_in_full_screen_title">Easier to Watch in Full Screen</string>
     <string name="settings_hide_fab_in_post_feed">Hide FAB in Post Feed</string>
+    <string name="settings_comment_divider_type">Comment Divider Type</string>
 
     <string name="no_link_available">Cannot get the link</string>
 

app/src/main/res/xml/comment_preferences.xml

@@ -12,6 +12,15 @@
         app:key="show_comment_divider"
         app:title="@string/settings_show_comment_divider_title" />
 
+    <ml.docilealligator.infinityforreddit.customviews.CustomFontListPreference
+        app:defaultValue="0"
+        app:key="comment_divider_type"
+        android:title="@string/settings_comment_divider_type"
+        app:entries="@array/settings_comment_divider_type"
+        app:entryValues="@array/settings_comment_divider_type_values"
+        app:useSimpleSummaryProvider="true"
+        app:isPreferenceVisible="false" />
+
     <ml.docilealligator.infinityforreddit.customviews.CustomFontSwitchPreference
         app:defaultValue="false"
         app:key="show_only_one_comment_level_indicator"