android-ActionMode使用

private ActionMode.Callback mCallback = new ActionMode.Callback() {

        @Override
        public boolean onActionItemClicked(ActionMode arg0, MenuItem arg1) {
            final ArrayList<GridItem> selectItem = mAdapter.mSelectItem;
            if (arg1.getItemId() == R.id.menu_delete) {
                new AlertDialog.Builder(mContext)
                    .setTitle(mContext.getString(R.string.delete))
                    .setIcon(null)
                    .setMessage(mContext.getResources()
                            .getQuantityString(R.plurals.delete_selection, mAdapter.mSelectItem.size()))
                    .setPositiveButton(mContext.getString(R.string.ok), new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int whichButton) {
                            DeleteImage da = new DeleteImage(selectItem);
                            da.execute();
                        }
                    })
                    .setNegativeButton(mContext.getString(R.string.cancel), new DialogInterface.OnClickListener() {
                        public void onClick(DialogInterface dialog, int whichButton) {
                        }
                    }).show();
            } else if (arg1.getItemId() == R.id.menu_share) {
                Intent intent = computeSharingIntent();
                getActivity().startActivity(Intent.createChooser(intent, getString(R.string.share)));
            } else if (arg1.getItemId() == R.id.menu_select) {
                if (selectItem.size() == mGirdList.size()) {
                    clearGridList();
                } else {
                    selectAllGridList();
                }
                updateSelectNumber();
                mAdapter.notifyDataSetChanged();
            }
            return false;
        }

        @Override
        public boolean onCreateActionMode(ActionMode arg0, Menu arg1) {
            LayoutInflater layoutInflater = (LayoutInflater) getActivity().getSystemService(Context.LAYOUT_INFLATER_SERVICE);//添加普通的布局文件，大多是显示在顶上的----
            View customView = layoutInflater.inflate(R.layout.funui_action_mode, null);//----->注意是LayoutInflater 
            arg0.setCustomView(customView);
            mSelect = (TextView) customView.findViewById(R.id.select);

            MenuInflater inflater = arg0.getMenuInflater();//注意跟上面的区别，这个是用来添加menu的 
            inflater.inflate(R.menu.image_menu, arg1); //这里还可以用来设置里面的元素的状态，使用的方法是mSelectItem = menu.findItem(R.id.select_all);
            return true;
        }

        @Override
        public void onDestroyActionMode(ActionMode arg0) {
            setSelectMode(false);
            mAdapter.notifyDataSetChanged();
        }

        @Override
        public boolean onPrepareActionMode(ActionMode arg0, Menu arg1) {
            return false;
        }
    };

 private void cancelSelect() {    266
            for (Album album : mAlbumlist) {
            album.isSelected = false;    
            }    
            mAdapter.mSelectAlbum.clear();
            }    
                
            private void selectAll() {    
            mAdapter.mSelectAlbum.clear();
            for (Album album : mAlbumlist) {
            album.isSelected = true;
            mAdapter.mSelectAlbum.add(album);
            }    
            }