REAndroid
diff --git a/‎src/main/java/com/reandroid/utils/collection/ArrayCollection.java‎
Lines changed: 4 additions & 0 deletions b/‎src/main/java/com/reandroid/utils/collection/ArrayCollection.java‎
Lines changed: 4 additions & 0 deletions
@@ -905,6 +905,9 @@ public void add(int i, T item){
         }
         boolean locked = mLocked;
         this.mLocked = true;
+        if (availableCapacity() == 0) {
+            ensureCapacity(calculateGrow());
+        }
         slideRight(i, 1);
         this.mElements[i] = item;
         notifyAdd(i, item);
@@ -976,6 +979,7 @@ public boolean addAll(int index, Collection<? extends T> collection){
         }
         boolean locked = mLocked;
         this.mLocked = true;
+        ensureCapacity(length);
         slideRight(index, length);
         Object[] elements = this.mElements;
         int i = index;