diff --git a/src/android/MediaObject.java b/src/android/MediaObject.java
index 054aea0..5e5debd 100644
--- a/src/android/MediaObject.java
+++ b/src/android/MediaObject.java
@@ -7,7 +7,10 @@ import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.Serializable;
+import java.util.Iterator;
 import java.util.LinkedList;
+import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.concurrent.locks.Lock;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.function.Consumer;
@@ -76,7 +79,7 @@ public class MediaObject implements Serializable {
     /**
      * 获取所有分块
      */
-    private LinkedList<MediaPart> mMediaList = new LinkedList<MediaPart>();
+    private List<MediaPart> mMediaList = new CopyOnWriteArrayList<MediaPart>();
 
     private Lock lock = new ReentrantLock();
 
@@ -225,9 +228,10 @@ public class MediaObject implements Serializable {
       if(mMediaList == null){
         return;
       }
-      synchronized (mMediaList){
-        for (MediaPart part : mMediaList) {
-          consumer.accept(part);
+      Iterator<MediaPart>  iterator = mMediaList.iterator();
+      synchronized (iterator){
+        while(iterator.hasNext()){
+          consumer.accept(iterator.next());
         }
       }
     }
@@ -401,7 +405,7 @@ public class MediaObject implements Serializable {
         FileUtils.deleteDir(mOutputDirectory);
     }
 
-    public LinkedList<MediaPart> getMedaParts() {
+    public List<MediaPart> getMedaParts() {
         return mMediaList;
     }