diff --git a/docs/material-chips-input-sample-v1.0.4_4.apk b/docs/material-chips-input-sample-v1.0.4_4.apk
new file mode 100644
index 00000000..289008a3
Binary files /dev/null and b/docs/material-chips-input-sample-v1.0.4_4.apk differ
diff --git a/library/src/main/java/com/pchmn/materialchips/adapter/FilterableAdapter.java b/library/src/main/java/com/pchmn/materialchips/adapter/FilterableAdapter.java
index 50b83cdb..68b91519 100644
--- a/library/src/main/java/com/pchmn/materialchips/adapter/FilterableAdapter.java
+++ b/library/src/main/java/com/pchmn/materialchips/adapter/FilterableAdapter.java
@@ -49,6 +49,9 @@ public class FilterableAdapter extends RecyclerView.Adapter<RecyclerView.ViewHol
     private ColorStateList mTextColor;
     // recycler
     private RecyclerView mRecyclerView;
+    // sort
+    private Comparator<ChipInterface> mComparator;
+    private Collator mCollator;
 
 
     public FilterableAdapter(Context context,
@@ -59,23 +62,18 @@ public FilterableAdapter(Context context,
                              ColorStateList textColor) {
         mContext = context;
         mRecyclerView = recyclerView;
-        if(chipList == null) {
-            Log.e(TAG, "The filterable list is null");
-            Toast.makeText(context, "The filterable list is null", Toast.LENGTH_LONG).show();
-        }
-        else {
-            Collections.sort(chipList, new Comparator<ChipInterface>() {
-                @Override
-                public int compare(ChipInterface o1, ChipInterface o2) {
-                    Collator collator = Collator.getInstance(Locale.getDefault());
-                    collator.setStrength(Collator.PRIMARY);
-                    return collator.compare(o1.getLabel(), o2.getLabel());
-                }
-            });
-            mOriginalList.addAll(chipList);
-            mChipList.addAll(chipList);
-            mFilteredList.addAll(chipList);
-        }
+        mCollator = Collator.getInstance(Locale.getDefault());
+        mCollator.setStrength(Collator.PRIMARY);
+        mComparator = new Comparator<ChipInterface>() {
+            @Override
+            public int compare(ChipInterface o1, ChipInterface o2) {
+                return mCollator.compare(o1.getLabel(), o2.getLabel());
+            }
+        };
+        sortList(chipList);
+        mOriginalList.addAll(chipList);
+        mChipList.addAll(chipList);
+        mFilteredList.addAll(chipList);
         mLetterTileProvider = new LetterTileProvider(mContext);
         mBackgroundColor = backgroundColor;
         mTextColor = textColor;
@@ -248,23 +246,9 @@ private void addChip(ChipInterface chip) {
             mChipList.add(chip);
             mFilteredList.add(chip);
             // sort original list
-            Collections.sort(mChipList, new Comparator<ChipInterface>() {
-                @Override
-                public int compare(ChipInterface o1, ChipInterface o2) {
-                    Collator collator = Collator.getInstance(Locale.getDefault());
-                    collator.setStrength(Collator.PRIMARY);
-                    return collator.compare(o1.getLabel(), o2.getLabel());
-                }
-            });
+            sortList(mChipList);
             // sort filtered list
-            Collections.sort(mFilteredList, new Comparator<ChipInterface>() {
-                @Override
-                public int compare(ChipInterface o1, ChipInterface o2) {
-                    Collator collator = Collator.getInstance(Locale.getDefault());
-                    collator.setStrength(Collator.PRIMARY);
-                    return collator.compare(o1.getLabel(), o2.getLabel());
-                }
-            });
+            sortList(mFilteredList);
 
             notifyDataSetChanged();
         }
@@ -278,5 +262,7 @@ private boolean contains(ChipInterface chip) {
         return false;
     }
 
-
+    private void sortList(List<? extends ChipInterface> list) {
+        Collections.sort(list, mComparator);
+    }
 }