import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
/**
 * Updates the CollectionView with the given list of {@code videos}.
 */
private void updateCollectionView(List<VideoLibraryModel.Video> videos) {
    LOGD(TAG, "Updating filtered video library collection view.");
    CollectionView.Inventory inventory = new CollectionView.Inventory();
    int normalColumns = getResources().getInteger(R.integer.video_library_columns);

    // Go through all videos and organize them into groups for each topic. We assume they are
    // already ordered by topics.
    CollectionView.InventoryGroup curGroup = new CollectionView.InventoryGroup(0)
                    .setDataIndexStart(0)
                    .setShowHeader(false)
                    .setDisplayCols(normalColumns);
    for (int dataIndex = 0; dataIndex < videos.size(); ++dataIndex) {
        curGroup.addItemWithTag(videos.get(dataIndex));
    }

    if (curGroup.getRowCount() > 0) {
        inventory.addGroup(curGroup);
    }

    mCollectionView.setCollectionAdapter(this);
    mCollectionView.updateInventory(inventory);

    mEmptyView.setVisibility(videos.isEmpty() ? View.VISIBLE : View.GONE);
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
/**
 * Returns a {@link CollectionView.InventoryGroup} containing {@code numRandomVideos} number of
 * videos randomly selected in the given {@code videos} list.
 */
private CollectionView.InventoryGroup makeRandomCollectionViewInventoryGroup(
        List<VideoLibraryModel.Video> videos, int numRandomVideos, String groupHeaderLabel,
        int groupId) {

    // Get the number of display columns for each groups.
    int normalColumns = getResources().getInteger(R.integer.video_library_columns);

    // Randomly select the requested number of items fro the list.
    videos = new ArrayList<>(videos);
    Collections.shuffle(videos);
    videos = videos.subList(0, Math.min(videos.size(), numRandomVideos));

    // Add these videos to the group.
    CollectionView.InventoryGroup lastYearGroup =
            new CollectionView.InventoryGroup(groupId)
                    .setDataIndexStart(0)
                    .setHeaderLabel(groupHeaderLabel)
                    .setShowHeader(true)
                    .setDisplayCols(normalColumns);
    for (VideoLibraryModel.Video video : videos) {
        lastYearGroup.addItemWithTag(video);
    }
    return lastYearGroup;
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
public CollectionView.Inventory getInventory() {
    CollectionView.Inventory inventory = new CollectionView.Inventory();
    // setup hero hashtag
    inventory.addGroup(new CollectionView.InventoryGroup(HERO_GROUP_ID)
            .setDisplayCols(1)
            .setItemCount(1)
            .setShowHeader(false));

    // setup other hashtags
    inventory.addGroup(new CollectionView.InventoryGroup(HashtagsQuery.TOKEN)
            .setDisplayCols(mContext.getResources().getInteger(R.integer.social_grid_columns))
            .setItemCount(mCursor.getCount() - 1)
            .setDataIndexStart(1)
            .setShowHeader(false));
    return inventory;
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View rootView = inflater.inflate(R.layout.fragment_partners, container, false);
    if (getArguments() != null && !getArguments().getBoolean(ARG_HAS_HEADER, true)) {
        rootView.findViewById(R.id.headerbar).setVisibility(View.GONE);
    }

    rootView.findViewById(R.id.close_button).setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            // TODO: refactor to use fragment callbacks
            getFragmentManager().popBackStack();
        }
    });

    mCollectionView = (CollectionView) rootView.findViewById(R.id.collection_view);
    return rootView;
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
@Override
protected void onPostCreate(Bundle savedInstanceState) {
    super.onPostCreate(savedInstanceState);
    CollectionView collectionView = (CollectionView) findViewById(R.id.sessions_collection_view);
    if (collectionView != null) {
        enableActionBarAutoHide(collectionView);
    }

    mSessionsFrag = (SessionsFragment) getFragmentManager().findFragmentById(
            R.id.sessions_fragment);
    if (mSessionsFrag != null && savedInstanceState == null) {
        Bundle args = intentToFragmentArguments(getIntent());
        mSessionsFrag.reloadFromArguments(args);
    }

    registerHideableHeaderView(findViewById(R.id.headerbar));
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
/**
 * Returns a new instance of {@link CollectionView.Inventory}. It always contains a single
 * {@link CollectionView.InventoryGroup}.
 *
 * @return A new instance of {@link CollectionView.Inventory}.
 */
public CollectionView.Inventory getInventory() {
    CollectionView.Inventory inventory = new CollectionView.Inventory();
    inventory.addGroup(new CollectionView.InventoryGroup(ExploreSessionsQuery.NORMAL_TOKEN)
            .setDisplayCols(mDisplayColumns)
            .setItemCount(getCursor().getCount())
            .setDataIndexStart(0)
            .setShowHeader(false));
    return inventory;
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View root = inflater.inflate(R.layout.explore_io_frag, container, false);
    mCollectionView = (CollectionView) root.findViewById(R.id.explore_collection_view);
    mEmptyView = root.findViewById(android.R.id.empty);
    getActivity().overridePendingTransition(0, 0);

    return root;
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View root = inflater.inflate(R.layout.video_library_frag, container, false);
    mCollectionView = (CollectionView) root.findViewById(R.id.videos_collection_view);
    mEmptyView = root.findViewById(android.R.id.empty);
    getActivity().overridePendingTransition(0, 0);

    return root;
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    View root = inflater.inflate(R.layout.video_library_frag, container, false);
    mCollectionView = (CollectionView) root.findViewById(R.id.videos_collection_view);
    mEmptyView = root.findViewById(android.R.id.empty);
    getActivity().overridePendingTransition(0, 0);

    // Reload the content so that new random Videos are shown.
    fireReloadEvent();

    return root;
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
@Override
public ViewGroup newCollectionGroupView(Context context, int groupId,
                                        CollectionView.InventoryGroup group, ViewGroup parent) {
    LayoutInflater inflater = (LayoutInflater) context.getSystemService(
            Context.LAYOUT_INFLATER_SERVICE);
    return (ViewGroup) inflater.inflate(R.layout.video_lib_card_container, parent, false);
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
@Override
public void onLoaderReset(Loader<Cursor> loader) {
    switch (loader.getId()) {
        case PeopleIveMetQuery.TOKEN: {
            mCollectionView.updateInventory(new CollectionView.Inventory());
            break;
        }
        case PeopleIveMetSubQuery.TOKEN: {
            mPlusIds.clear();
            break;
        }
    }
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
public CollectionView.Inventory getInventory() {
    CollectionView.Inventory inventory = new CollectionView.Inventory();
    inventory.addGroup(new CollectionView.InventoryGroup(PeopleIveMetQuery.TOKEN)
            .setDisplayCols(1)
            .setItemCount(1)
            .setDataIndexStart(0)
            .setShowHeader(true)
            .setHeaderLabel(mContext.getString(R.string.title_people_ive_met)));
    return inventory;
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View root = inflater.inflate(R.layout.fragment_video_library, container, false);
    mCollectionView = (CollectionView) root.findViewById(R.id.videos_collection_view);
    mEmptyView = root.findViewById(android.R.id.empty);
    return root;
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
@Override
public void onLoaderReset(Loader<Cursor> loader) {
    switch (loader.getId()) {
        case ExpertsQuery.TOKEN: {
            mCollectionView.updateInventory(new CollectionView.Inventory());
            break;
        }
    }
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
/**
 * Returns a new instance of {@link CollectionView.Inventory}. It always contains only one
 * {@link CollectionView.InventoryGroup}.
 *
 * @return A new instance of {@link CollectionView.Inventory}
 */
public CollectionView.Inventory getInventory() {
    CollectionView.Inventory inventory = new CollectionView.Inventory();
    inventory.addGroup(new CollectionView.InventoryGroup(ExpertsQuery.TOKEN)
            .setDisplayCols(mDisplayCols)
            .setItemCount(mCursor.getCount())
            .setDataIndexStart(0)
            .setShowHeader(mShowHeader)
            .setHeaderLabel(getString(R.string.title_experts_directory)));
    return inventory;
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    ViewGroup root = (ViewGroup) inflater.inflate(R.layout.fragment_sessions, container, false);
    mCollectionView = (CollectionView) root.findViewById(R.id.sessions_collection_view);
    mPreloader = new Preloader(ROWS_TO_PRELOAD);
    mCollectionView.setOnScrollListener(mPreloader);
    mEmptyView = (TextView) root.findViewById(R.id.empty_text);
    mLoadingView = root.findViewById(R.id.loading);
    return root;
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
private void updateCollectionView() {
    if (mCursor == null || mTagMetadata == null) {
        LOGD(TAG, "updateCollectionView: not ready yet... " + (mCursor == null ? "no cursor." :
                "no tag metadata."));
        // not ready!
        return;
    }
    LOGD(TAG, "SessionsFragment updating CollectionView... " + (mSessionDataIsFullReload ?
            "(FULL RELOAD)" : "(light refresh)"));
    mCursor.moveToPosition(-1);
    int itemCount = mCursor.getCount();

    mMaxDataIndexAnimated = 0;

    CollectionView.Inventory inv;
    if (itemCount == 0) {
        showEmptyView();
        inv = new CollectionView.Inventory();
    } else {
        hideEmptyView();
        inv = prepareInventory();
    }

    Parcelable state = null;
    if (!mSessionDataIsFullReload) {
        // it's not a full reload, so we want to keep scroll position, etc
        state = mCollectionView.onSaveInstanceState();
    }
    LOGD(TAG, "Updating CollectionView with inventory, # groups = " + inv.getGroupCount()
            + " total items = " + inv.getTotalItemCount());
    mCollectionView.setCollectionAdapter(this);
    mCollectionView.updateInventory(inv, mSessionDataIsFullReload);
    if (state != null) {
        mCollectionView.onRestoreInstanceState(state);
    }
    mSessionDataIsFullReload = false;
}
 

import com.google.samples.apps.iosched.ui.widget.CollectionView; //导入依赖的package包/类
/**
 * Returns a new instance of {@link CollectionView.Inventory}. It always contains only one
 * {@link CollectionView.InventoryGroup}.
 *
 * @return A new instance of {@link CollectionView.Inventory}
 */
public CollectionView.Inventory getInventory() {
    CollectionView.Inventory inventory = new CollectionView.Inventory();
    inventory.addGroup(new CollectionView.InventoryGroup(PartnersQuery._TOKEN)
            .setDisplayCols(mDisplayCols)
            .setItemCount(mCursor.getCount())
            .setDataIndexStart(0)
            .setShowHeader(false)
            .setHeaderLabel(getString(R.string.title_experts_directory)));
    return inventory;
}