@Override
    public void onClick(View v) {
        int id = v.getId();
        if (id == R.id.choose_ok_btn) {
            onFinish(mMediaAdapter.getSelectedMedias());
        } else if (id == R.id.choose_preview_btn) {
            if (!mIsPreview) {
                mIsPreview = true;
                ArrayList<BaseMedia> medias = (ArrayList<BaseMedia>) mMediaAdapter.getSelectedMedias();
                Boxing.get().withIntent(getActivity(), BoxingViewActivity.class, medias)
                        .start(this, BoxingViewFragment.IMAGE_PREVIEW_REQUEST_CODE, BoxingConfig.ViewMode.PRE_EDIT);

            }
        }

    }
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