X-Git-Url: http://git.linex4red.de/pub/Android/ownCloud.git/blobdiff_plain/5a22c7e79f1a53ccdbae04327e6ac500f3676a67..c3ca5b5a4fda44999f215a3559921a4781f310f8:/src/com/owncloud/android/operations/DownloadFileOperation.java

diff --git a/src/com/owncloud/android/operations/DownloadFileOperation.java b/src/com/owncloud/android/operations/DownloadFileOperation.java
index e84345ca..0aa9d1e6 100644
--- a/src/com/owncloud/android/operations/DownloadFileOperation.java
+++ b/src/com/owncloud/android/operations/DownloadFileOperation.java
@@ -124,9 +124,17 @@ public class DownloadFileOperation extends RemoteOperation {
     
     
     public void addDatatransferProgressListener (OnDatatransferProgressListener listener) {
-        mDataTransferListeners.add(listener);
+        synchronized (mDataTransferListeners) {
+            mDataTransferListeners.add(listener);
+        }
     }
     
+    public void removeDatatransferProgressListener(OnDatatransferProgressListener listener) {
+        synchronized (mDataTransferListeners) {
+            mDataTransferListeners.remove(listener);
+        }
+    }
+
     @Override
     protected RemoteOperationResult run(WebdavClient client) {
         RemoteOperationResult result = null;
@@ -191,9 +199,11 @@ public class DownloadFileOperation extends RemoteOperation {
                     }
                     fos.write(bytes, 0, readResult);
                     transferred += readResult;
-                    it = mDataTransferListeners.iterator();
-                    while (it.hasNext()) {
-                        it.next().onTransferProgress(readResult, transferred, mFile.getFileLength(), targetFile.getName());
+                    synchronized (mDataTransferListeners) {
+                        it = mDataTransferListeners.iterator();
+                        while (it.hasNext()) {
+                            it.next().onTransferProgress(readResult, transferred, mFile.getFileLength(), targetFile.getName());
+                        }
                     }
                 }
                 savedFile = true;
@@ -222,4 +232,5 @@ public class DownloadFileOperation extends RemoteOperation {
         mCancellationRequested.set(true);   // atomic set; there is no need of synchronizing it
     }
 
+
 }