+ public void addDatatransferProgressListener (OnDatatransferProgressListener listener) {
+ synchronized (mDataTransferListeners) {
+ mDataTransferListeners.add(listener);
+ }
+ }
+
+ public void removeDatatransferProgressListener(OnDatatransferProgressListener listener) {
+ synchronized (mDataTransferListeners) {
+ mDataTransferListeners.remove(listener);
+ }
+ }
+