private void showProgressDialog() {
        if (mDialog == null) {
            mDialog = new ProgressDialog(getActivity());
            mDialog.setIndeterminate(true);
            mDialog.setMessage(getString(R.string.boxing_handling));
        }
       if (!mDialog.isShowing()) {
           mDialog.show();
       }
    }
A full implement for {@link com.bilibili.boxing.presenter.PickerContract.View} supporting all the mode
in {@link BoxingConfig.Mode}.
use this to pick the picture.

@author ChenSL
boxing-impl/src/main/java/com/bilibili/boxing_impl/ui/BoxingViewFragment.java