Set item offset in Postfragment when using StaggeredGridLayoutManager. Minor UI tweaks.

app/src/main/java/ml/docilealligator/infinityforreddit/PostFragment.java

@@ -7,11 +7,11 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.res.Configuration;
 import android.content.res.Resources;
+import android.graphics.Rect;
 import android.os.Build;
 import android.os.Bundle;
 import android.os.CountDownTimer;
 import android.os.Handler;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -22,6 +22,7 @@ import android.widget.LinearLayout;
 import android.widget.TextView;
 import android.widget.Toast;
 
+import androidx.annotation.DimenRes;
 import androidx.annotation.NonNull;
 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 import androidx.fragment.app.Fragment;
@@ -159,6 +160,9 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
         } else {
             mStaggeredGridLayoutManager = new StaggeredGridLayoutManager(2, StaggeredGridLayoutManager.VERTICAL);
             mPostRecyclerView.setLayoutManager(mStaggeredGridLayoutManager);
+            StaggeredGridLayoutManagerItemOffsetDecoration itemDecoration =
+                    new StaggeredGridLayoutManagerItemOffsetDecoration(activity, R.dimen.staggeredLayoutManagerItemOffset);
+            mPostRecyclerView.addItemDecoration(itemDecoration);
         }
 
         mGlide = Glide.with(activity);
@@ -583,4 +587,35 @@ public class PostFragment extends Fragment implements FragmentCommunicator {
             currentPosition = -1;
         }
     }
+
+    private static class StaggeredGridLayoutManagerItemOffsetDecoration extends RecyclerView.ItemDecoration {
+
+        private int mItemOffset;
+
+        StaggeredGridLayoutManagerItemOffsetDecoration(int itemOffset) {
+            mItemOffset = itemOffset;
+        }
+
+        StaggeredGridLayoutManagerItemOffsetDecoration(@NonNull Context context, @DimenRes int itemOffsetId) {
+            this(context.getResources().getDimensionPixelSize(itemOffsetId));
+        }
+
+        @Override
+        public void getItemOffsets(@NonNull Rect outRect, @NonNull View view, @NonNull RecyclerView parent,
+                                   @NonNull RecyclerView.State state) {
+            super.getItemOffsets(outRect, view, parent, state);
+
+            StaggeredGridLayoutManager.LayoutParams layoutParams = (StaggeredGridLayoutManager.LayoutParams) view.getLayoutParams();
+
+            int spanIndex = layoutParams.getSpanIndex();
+
+            int halfOffset = mItemOffset / 2;
+
+            if(spanIndex == 0) {
+                outRect.set(0, 0, halfOffset, 0);
+            } else {
+                outRect.set(halfOffset, 0, 0, 0);
+            }
+        }
+    }
 }

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

@@ -28,6 +28,7 @@
         android:id="@+id/fetch_comments_info_linear_layout_comments_listing_fragment"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
+        android:layout_marginBottom="48dp"
         android:gravity="center"
         android:orientation="vertical"
         android:visibility="gone">

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

@@ -15,6 +15,7 @@
         android:id="@+id/no_subscriptions_linear_layout_followed_users_listing_fragment"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        android:layout_marginBottom="48dp"
         android:gravity="center"
         android:orientation="vertical"
         android:visibility="gone">

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

@@ -26,6 +26,7 @@
         android:id="@+id/fetch_post_info_linear_layout_post_fragment"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        android:layout_marginBottom="48dp"
         android:gravity="center"
         android:orientation="vertical"
         android:visibility="gone">

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

@@ -28,6 +28,7 @@
         android:id="@+id/fetch_subreddit_listing_info_linear_layout_subreddit_listing_fragment"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        android:layout_marginBottom="48dp"
         android:gravity="center"
         android:orientation="vertical"
         android:visibility="gone">

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

@@ -15,6 +15,7 @@
         android:id="@+id/no_subscriptions_linear_layout_subreddits_listing_fragment"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        android:layout_marginBottom="48dp"
         android:gravity="center"
         android:orientation="vertical"
         android:visibility="gone">

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

@@ -28,6 +28,7 @@
         android:id="@+id/fetch_user_listing_info_linear_layout_user_listing_fragment"
         android:layout_width="match_parent"
         android:layout_height="match_parent"
+        android:layout_marginBottom="48dp"
         android:gravity="center"
         android:orientation="vertical"
         android:visibility="gone">

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

@@ -2,7 +2,7 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
-    android:layout_margin="36dp"
+    android:layout_margin="48dp"
     android:orientation="vertical">
 
     <ImageView

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

@@ -9,4 +9,5 @@
     <dimen name="text_margin">16dp</dimen>
     <dimen name="roundedBottomSheetCornerRadiusLeftPadding">0dp</dimen>
     <dimen name="roundedBottomSheetCornerRadiusRightPadding">0dp</dimen>
+    <dimen name="staggeredLayoutManagerItemOffset">16dp</dimen>
 </resources>