Make release v0.4.10.

example/src/main/java/com/tonicartos/superslimexample/CountryNamesAdapter.java

@@ -86,8 +86,7 @@ public void onBindViewHolder(CountryViewHolder holder, int position) {
 
         holder.bindItem(item.text);
 
-        final GridSLM.LayoutParams lp = new GridSLM.LayoutParams(
-                itemView.getLayoutParams());
+        final GridSLM.LayoutParams lp = GridSLM.LayoutParams.from(itemView.getLayoutParams());
         // Overrides xml attrs, could use different layouts too.
         if (item.isHeader) {
             lp.headerDisplay = mHeaderDisplay;

gradle.properties

@@ -17,8 +17,8 @@
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
 
-VERSION_NAME=0.4.9.1
-VERSION_CODE=22
+VERSION_NAME=0.4.10
+VERSION_CODE=24
 GROUP=com.tonicartos
 
 POM_GENERATE_UNIQUE_SNAPSHOTS=false

library/src/main/java/com/tonicartos/superslim/GridSLM.java

@@ -2,6 +2,7 @@
 
 import android.content.Context;
 import android.content.res.TypedArray;
+import android.support.annotation.NonNull;
 import android.support.v7.widget.RecyclerView;
 import android.util.AttributeSet;
 import android.util.Log;
@@ -39,6 +40,8 @@ public GridSLM(LayoutManager layoutManager, Context context) {
 
     @Override
     public int computeHeaderOffset(int firstVisiblePosition, SectionData sd, LayoutState state) {
+        final int itemCount = state.recyclerState.getItemCount();
+
         /*
          * Work from an assumed overlap and add heights from the start until the overlap is zero or
          * less, or the current position (or max items) is reached.
@@ -49,7 +52,7 @@ public int computeHeaderOffset(int firstVisiblePosition, SectionData sd, LayoutS
                 position += mNumColumns) {
             // Look to see if the header overlaps with the displayed area of the mSection.
             int rowHeight = 0;
-            for (int col = 0; col < mNumColumns; col++) {
+            for (int col = 0; col < mNumColumns && position + col < itemCount; col++) {
                 LayoutState.View child = state.getView(position + col);
                 measureChild(child, sd);
                 rowHeight =
@@ -260,7 +263,7 @@ public int finishFillToStart(int leadingEdge, View anchor, SectionData sd, Layou
 
     @Override
     public LayoutManager.LayoutParams generateLayoutParams(LayoutManager.LayoutParams params) {
-        return new LayoutParams(params);
+        return LayoutParams.from(params);
     }
 
     @Override
@@ -475,16 +478,49 @@ public LayoutParams(Context c, AttributeSet attrs) {
             a.recycle();
         }
 
+        /**
+         * <em>This constructor will be protected in version 0.5.</em>
+         * <p>
+         * Use {@link #from} instead.
+         * </p>
+         *
+         * @param other Source layout params.
+         */
+        @Deprecated
         public LayoutParams(ViewGroup.MarginLayoutParams other) {
             super(other);
             init(other);
         }
 
+        /**
+         * <em>This constructor will be protected in version 0.5.</em>
+         * <p>
+         * Use {@link #from} instead as this constructor will not copy the margin params from the
+         * source layout.
+         * </p>
+         *
+         * @param other Source layout params.
+         */
+        @Deprecated
         public LayoutParams(ViewGroup.LayoutParams other) {
             super(other);
             init(other);
         }
 
+        /**
+         * Creates a new instance of {@link LayoutParams}.
+         *
+         * @param other Source layout params.
+         * @return New grid layout params.
+         */
+        public static LayoutParams from(@NonNull ViewGroup.LayoutParams other) {
+            if (other instanceof ViewGroup.MarginLayoutParams) {
+                return new LayoutParams((ViewGroup.MarginLayoutParams) other);
+            } else {
+                return new LayoutParams(other);
+            }
+        }
+
         public int getColumnWidth() {
             return mColumnWidth;
         }

library/src/main/java/com/tonicartos/superslim/LayoutManager.java

@@ -8,6 +8,7 @@
 import android.os.Build;
 import android.os.Parcel;
 import android.os.Parcelable;
+import android.support.annotation.NonNull;
 import android.support.v7.widget.LinearSmoothScroller;
 import android.support.v7.widget.RecyclerView;
 import android.text.TextUtils;
@@ -265,14 +266,27 @@ public void onLayoutChildren(RecyclerView.Recycler recycler, RecyclerView.State
         fixOverscroll(bottomLine, layoutState);
     }
 
+
+    @Override
+    public void onItemsChanged(RecyclerView recyclerView) {
+        View view = getAnchorChild();
+        if (view == null) {
+            mRequestPosition = NO_POSITION_REQUEST;
+            mRequestPositionOffset = 0;
+        } else {
+            mRequestPosition = getPosition(view);
+            mRequestPositionOffset = getDecoratedTop(view);
+        }
+    }
+
     @Override
     public RecyclerView.LayoutParams generateDefaultLayoutParams() {
         return new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
     }
 
     @Override
     public LayoutParams generateLayoutParams(ViewGroup.LayoutParams lp) {
-        LayoutParams params = new LayoutParams(lp);
+        LayoutParams params = LayoutParams.from(lp);
         params.width = LayoutParams.MATCH_PARENT;
         params.height = LayoutParams.MATCH_PARENT;
 
@@ -1273,14 +1287,9 @@ private boolean isOverscrolled(LayoutState state) {
             return false;
         }
 
-        View lastVisibleView = findLastCompletelyVisibleItem();
-        if (lastVisibleView == null) {
-            lastVisibleView = getChildAt(getChildCount() - 1);
-        }
-
-        boolean reachedBottom = getPosition(lastVisibleView) == itemCount - 1;
-        if (!reachedBottom ||
-                getDecoratedBottom(lastVisibleView) >= getHeight() - getPaddingBottom()) {
+        View lastVisibleView = findLastVisibleItem();
+        if (getPosition(lastVisibleView) == itemCount - 1
+                && getDecoratedBottom(lastVisibleView) >= getHeight() - getPaddingBottom()) {
             return false;
         }
 
@@ -1544,7 +1553,8 @@ private void trimStart(LayoutState state) {
     }
 
     /**
-     * Trim all content wholly beyond the direction edge. If the direction is START, then update the
+     * Trim all content wholly beyond the direction edge. If the direction is START, then update
+     * the
      * header of the section intersecting the top edge.
      *
      * @param direction Direction of edge to trim against.
@@ -1781,16 +1791,49 @@ public LayoutParams(Context c, AttributeSet attrs) {
 
         int sectionManagerKind = SECTION_MANAGER_LINEAR;
 
+        /**
+         * <em>This constructor will be removed in version 0.5.</em>
+         * <p>
+         * Use {@link #from} instead.
+         * </p>
+         *
+         * @param other Source layout params.
+         */
+        @Deprecated
         public LayoutParams(ViewGroup.MarginLayoutParams other) {
             super(other);
             init(other);
         }
 
+        /**
+         * <em>This constructor will be removed in version 0.5.</em>
+         * <p>
+         * Use {@link #from} instead as this constructor will not copy the margin params from the
+         * source layout.
+         * </p>
+         *
+         * @param other Source layout params.
+         */
+        @Deprecated
         public LayoutParams(ViewGroup.LayoutParams other) {
             super(other);
             init(other);
         }
 
+        /**
+         * Creates a new instance of {@link LayoutParams}.
+         *
+         * @param other Source layout params.
+         * @return New layout params.
+         */
+        public static LayoutParams from(@NonNull ViewGroup.LayoutParams other) {
+            if (other instanceof ViewGroup.MarginLayoutParams) {
+                return new LayoutParams((ViewGroup.MarginLayoutParams) other);
+            } else {
+                return new LayoutParams(other);
+            }
+        }
+
         public boolean areHeaderFlagsSet(int flags) {
             return (headerDisplay & flags) == flags;
         }