update RecyclerView utils

lib_base/src/main/java/com/android/base/widget/recyclerview/DividerItemDecoration.java

@@ -174,4 +174,5 @@ public class DividerItemDecoration extends RecyclerView.ItemDecoration {
             outRect.set(0, 0, mDivider.getIntrinsicWidth(), 0);
         }
     }
+
 }

lib_base/src/main/java/com/android/base/widget/recyclerview/MarginDecoration.java

@@ -1,40 +0,0 @@
-package com.android.base.widget.recyclerview;
-
-import android.graphics.Rect;
-import android.view.View;
-
-import androidx.annotation.NonNull;
-import androidx.recyclerview.widget.RecyclerView;
-
-
-public class MarginDecoration extends RecyclerView.ItemDecoration {
-
-    private int mTop;
-    private int mLeft;
-    private int mRight;
-    private int mBottom;
-
-    public MarginDecoration(int left, int top, int right, int bottom) {
-        mTop = top;
-        mBottom = bottom;
-        mRight = right;
-        mLeft = left;
-    }
-
-    public MarginDecoration(int margin) {
-        mTop = margin;
-        mBottom = margin;
-        mRight = margin;
-        mLeft = margin;
-    }
-
-    @Override
-    public void getItemOffsets(@NonNull Rect outRect, @NonNull View view, @NonNull RecyclerView parent, @NonNull RecyclerView.State state) {
-        super.getItemOffsets(outRect, view, parent, state);
-        outRect.top = mTop;
-        outRect.bottom = mBottom;
-        outRect.left = mLeft;
-        outRect.right = mRight;
-    }
-
-}

lib_base/src/main/java/com/android/base/widget/recyclerview/MarginDecoration.kt

@@ -0,0 +1,33 @@
+package com.android.base.widget.recyclerview
+
+import android.graphics.Rect
+import android.view.View
+import androidx.recyclerview.widget.RecyclerView
+import androidx.recyclerview.widget.RecyclerView.ItemDecoration
+import androidx.recyclerview.widget.RecyclerView.State
+
+class MarginDecoration : ItemDecoration {
+
+    private var top: Int
+    private var left: Int
+    private var right: Int
+    private var bottom: Int
+
+    constructor(left: Int = 0, top: Int = 0, right: Int = 0, bottom: Int = 0) {
+        this.top = top
+        this.bottom = bottom
+        this.right = right
+        this.left = left
+    }
+
+    constructor(margin: Int) : this(margin, margin, margin, margin)
+
+    override fun getItemOffsets(outRect: Rect, view: View, parent: RecyclerView, state: State) {
+        super.getItemOffsets(outRect, view, parent, state)
+        outRect.top = top
+        outRect.bottom = bottom
+        outRect.left = left
+        outRect.right = right
+    }
+
+}

lib_base/src/main/java/com/android/base/widget/recyclerview/OnRecyclerViewScrollBottomListener.java

@@ -85,16 +85,13 @@ public abstract class OnRecyclerViewScrollBottomListener extends RecyclerView.On
         return max;
     }
 
-
     @Override
     public void onScrollStateChanged(RecyclerView recyclerView, int newState) {
         super.onScrollStateChanged(recyclerView, newState);
     }
 
-
     protected abstract void onBottom();
 
     protected abstract void onLeaveBottom();
 
-
 }