Fix the bug of ImageBrowserActivity not return the result

Author: fishwjy

filepicker/src/main/java/com/vincent/filepicker/activity/ImagePickActivity.java

@@ -113,6 +113,7 @@ protected void onActivityResult(int requestCode, int resultCode, Intent data) {
                     mCurrentNumber = data.getIntExtra(IMAGE_BROWSER_SELECTED_NUMBER, 0);
                     mAdapter.setCurrentNumber(mCurrentNumber);
                     mTbImagePick.setTitle(mCurrentNumber + "/" + mMaxNumber);
+                    refreshSelectedList(list);
                     mAdapter.refresh(list);
                 }
                 break;
@@ -139,6 +140,14 @@ public void onResult(List<Directory<ImageFile>> directories) {
         });
     }
 
+    private void refreshSelectedList(List<ImageFile> list) {
+        for (ImageFile file : list) {
+            if(file.isSelected() && !mSelectedList.contains(file)) {
+                mSelectedList.add(file);
+            }
+        }
+    }
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         getMenuInflater().inflate(R.menu.menu_image_pick, menu);