LibraryFragment.java 文件源码

/**
 * Show the view options dialog when the FAB is clicked.
 */
@OnClick(R.id.fab)
void onFabClick() {
    // Inflate dialog view and get views.
    @SuppressLint("InflateParams")
    View view = LayoutInflater.from(getContext()).inflate(R.layout.library_view_opts, null);
    final RadioGroup rgSortType = ButterKnife.findById(view, R.id.rg_sort_type);
    final RadioGroup rgSortDir = ButterKnife.findById(view, R.id.rg_sort_dir);
    final RadioGroup rgCardType = ButterKnife.findById(view, R.id.rg_card_type);

    // Set up views.
    rgSortType.check(sortType.getResId());
    rgSortDir.check(sortDir.getResId());
    rgCardType.check(cardType.getResId());

    // Construct material dialog.
    new MaterialDialog.Builder(getContext())
            .title(R.string.action_view_opts)
            .titleGravity(GravityEnum.CENTER)
            .customView(view, true)
            .contentGravity(GravityEnum.CENTER)
            .positiveText(R.string.ok)
            .negativeText(R.string.cancel)
            .onPositive((dialog, which) -> {
                // Figure out which options are different.
                boolean sortTypeChanged = rgSortType.getCheckedRadioButtonId() != sortType.getResId();
                boolean sortDirChanged = rgSortDir.getCheckedRadioButtonId() != sortDir.getResId();
                boolean cardTypeChanged = rgCardType.getCheckedRadioButtonId() != cardType.getResId();

                // Save new options locally if different, then persist them all to preferences.
                if (sortTypeChanged) sortType = SortType.fromResId(rgSortType.getCheckedRadioButtonId());
                if (sortDirChanged) sortDir = SortDir.fromResId(rgSortDir.getCheckedRadioButtonId());
                if (cardTypeChanged) cardType = BookCardType.fromResId(rgCardType.getCheckedRadioButtonId());
                Minerva.prefs().putLibraryViewOpts(sortType, sortDir, cardType);

                // Re-sort data if necessary.
                if (sortTypeChanged || sortDirChanged) sortRealmResults();

                // Switching the card type means switching the recycler view adapter, we certainly don't want to
                // do that if we haven't changed it.
                if (cardTypeChanged) changeCardType();

                // We only need to explicitly tell the recycler view to redraw its items if we changed our sort
                // options and didn't change our card type (swapping adapters to change card types would force a
                // redraw anyway).
                if ((sortTypeChanged || sortDirChanged) && !cardTypeChanged) //noinspection unchecked
                    adapter.updateRealmResults(books);
            })
            .show();
}