Java tutorial
/** * Android ownCloud News * * @author David Luhmer * @copyright 2013 David Luhmer david-dev@live.de * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE * License as published by the Free Software Foundation; either * version 3 of the License, or any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU AFFERO GENERAL PUBLIC LICENSE for more details. * * You should have received a copy of the GNU Affero General Public * License along with this library. If not, see <http://www.gnu.org/licenses/>. * */ package com.quarterfull.newsAndroid.ListView; import android.annotation.SuppressLint; import android.content.Context; import android.content.SharedPreferences; import android.os.AsyncTask; import android.preference.PreferenceManager; import android.support.v4.content.ContextCompat; import android.support.v7.widget.ViewUtils; import android.util.Log; import android.util.SparseArray; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.BaseExpandableListAdapter; import android.widget.ExpandableListView; import android.widget.ImageButton; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.ListView; import android.widget.TextView; import org.apache.commons.lang3.time.StopWatch; import java.util.ArrayList; import java.util.List; import butterknife.Bind; import butterknife.ButterKnife; import com.quarterfull.newsAndroid.R; import com.quarterfull.newsAndroid.SettingsActivity; import com.quarterfull.newsAndroid.database.DatabaseConnectionOrm; import com.quarterfull.newsAndroid.database.model.Feed; import com.quarterfull.newsAndroid.database.model.Folder; import com.quarterfull.newsAndroid.helper.FavIconHandler; import com.quarterfull.newsAndroid.helper.ThemeChooser; import com.quarterfull.newsAndroid.interfaces.ExpListTextClicked; import com.quarterfull.newsAndroid.model.AbstractItem; import com.quarterfull.newsAndroid.model.ConcreteFeedItem; import com.quarterfull.newsAndroid.model.FolderSubscribtionItem; import com.quarterfull.newsAndroid.model.Tuple; import static com.quarterfull.newsAndroid.ListView.SubscriptionExpandableListAdapter.SPECIAL_FOLDERS.ALL_STARRED_ITEMS; import static com.quarterfull.newsAndroid.ListView.SubscriptionExpandableListAdapter.SPECIAL_FOLDERS.ALL_UNREAD_ITEMS; import static com.quarterfull.newsAndroid.ListView.SubscriptionExpandableListAdapter.SPECIAL_FOLDERS.ITEMS_WITHOUT_FOLDER; public class SubscriptionExpandableListAdapter extends BaseExpandableListAdapter { private final String TAG = getClass().getCanonicalName(); private Context mContext; private DatabaseConnectionOrm dbConn; ListView listView; ExpListTextClicked eListTextClickHandler; private ArrayList<AbstractItem> mCategoriesArrayList; private SparseArray<ArrayList<ConcreteFeedItem>> mItemsArrayList; private boolean showOnlyUnread = false; public enum SPECIAL_FOLDERS { ALL_UNREAD_ITEMS(-10), ALL_STARRED_ITEMS(-11), ALL_ITEMS(-12), ITEMS_WITHOUT_FOLDER(-22); private int id; SPECIAL_FOLDERS(int id) { this.id = id; } public int getValue() { return id; } public String getValueString() { return String.valueOf(id); } @Override public String toString() { return getValueString(); } } private int mTextColorLightTheme; private FavIconHandler favIconHandler; LayoutInflater inflater; public SubscriptionExpandableListAdapter(Context mContext, DatabaseConnectionOrm dbConn, ListView listView) { favIconHandler = new FavIconHandler(mContext); this.inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); this.mContext = mContext; this.dbConn = dbConn; mTextColorLightTheme = ContextCompat.getColor(mContext, R.color.slider_listview_text_color_light_theme); unreadCountFeeds = new SparseArray<>(); unreadCountFolders = new SparseArray<>(); starredCountFeeds = new SparseArray<>(); mCategoriesArrayList = new ArrayList<>(); mItemsArrayList = new SparseArray<>(); this.listView = listView; } @Override public Object getChild(int groupPosition, int childPosition) { int parent_id = (int) getGroupId(groupPosition); return mItemsArrayList.get(parent_id).get(childPosition); } @Override public long getChildId(int groupPosition, int childPosition) { return ((ConcreteFeedItem) (getChild(groupPosition, childPosition))).id_database; } @Override public View getChildView(int groupPosition, int childPosition, boolean isLastChild, View convertView, ViewGroup parent) { final ConcreteFeedItem item = (ConcreteFeedItem) getChild(groupPosition, childPosition); final ChildHolder viewHolder; if (convertView != null) { viewHolder = (ChildHolder) convertView.getTag(); } else { LinearLayout view = new LinearLayout(mContext); convertView = inflater.inflate(R.layout.subscription_list_sub_item, view, true); viewHolder = new ChildHolder(convertView); convertView.setTag(viewHolder); } if (item != null) { String headerText = (item.header != null) ? item.header : ""; viewHolder.tV_HeaderText.setText(headerText); String unreadCount; if (item.idFolder == ALL_STARRED_ITEMS.getValue()) { unreadCount = starredCountFeeds.get((int) item.id_database); } else { unreadCount = unreadCountFeeds.get((int) item.id_database); } if (unreadCount != null) viewHolder.tV_UnreadCount.setText(unreadCount); else viewHolder.tV_UnreadCount.setText(""); favIconHandler.loadFavIconForFeed(item.favIcon, viewHolder.imgView_FavIcon); } else { viewHolder.tV_HeaderText.setText(mContext.getString(R.string.login_dialog_text_something_went_wrong)); viewHolder.tV_UnreadCount.setText(""); viewHolder.imgView_FavIcon.setImageDrawable(null); } return convertView; } static class ChildHolder { @Bind(R.id.list_item_layout) View listItemLayout; @Bind(R.id.summary) TextView tV_HeaderText; @Bind(R.id.tv_unreadCount) TextView tV_UnreadCount; @Bind(R.id.iVFavicon) ImageView imgView_FavIcon; public ChildHolder(View view) { ButterKnife.bind(this, view); } } @Override public int getChildrenCount(int groupPosition) { int parent_id = (int) getGroupId(groupPosition); return (mItemsArrayList.get(parent_id) != null) ? mItemsArrayList.get(parent_id).size() : 0; } @Override public Object getGroup(int groupPosition) { return mCategoriesArrayList.get(groupPosition); } @Override public int getGroupCount() { return mCategoriesArrayList.size(); } @Override public long getGroupId(int groupPosition) { return ((AbstractItem) getGroup(groupPosition)).id_database; } private enum GroupViewType { FOLDER, FEED } @Override public int getGroupType(int groupPosition) { AbstractItem ai = mCategoriesArrayList.get(groupPosition); if (ai instanceof FolderSubscribtionItem) return GroupViewType.FOLDER.ordinal(); else return GroupViewType.FEED.ordinal(); } @Override public int getGroupTypeCount() { return GroupViewType.values().length; } @Override public View getGroupView(final int groupPosition, final boolean isExpanded, View convertView, ViewGroup parent) { GroupHolder viewHolder; final AbstractItem group = (AbstractItem) getGroup(groupPosition); if (convertView == null) { LinearLayout view = new LinearLayout(mContext); convertView = inflater.inflate(R.layout.subscription_list_item, view, true); viewHolder = new GroupHolder(convertView); view.setTag(viewHolder); } else { viewHolder = (GroupHolder) convertView.getTag(); } viewHolder.txt_Summary.setText(group.header); viewHolder.listItemLayout.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { long idFeed = group.id_database; boolean skipFireEvent = false; if (group instanceof ConcreteFeedItem) { fireListTextClicked(idFeed, false, (long) ITEMS_WITHOUT_FOLDER.getValue()); skipFireEvent = true; } if (!skipFireEvent) fireListTextClicked(idFeed, true, ((FolderSubscribtionItem) group).idFolder); } }); viewHolder.listItemLayout.setOnLongClickListener(new View.OnLongClickListener() { @Override public boolean onLongClick(View v) { long idFeed = group.id_database; if (group instanceof ConcreteFeedItem) { fireListTextLongClicked(idFeed, false, (long) ITEMS_WITHOUT_FOLDER.getValue()); } else { fireListTextLongClicked(idFeed, true, ((FolderSubscribtionItem) group).idFolder); } return true; //consume event } }); viewHolder.txt_UnreadCount.setText(""); boolean skipGetUnread = false; if (group.idFolder != null && group.idFolder == ITEMS_WITHOUT_FOLDER.getValue()) { String unreadCount = unreadCountFeeds.get((int) group.id_database); if (unreadCount != null) { viewHolder.txt_UnreadCount.setText(unreadCount); } skipGetUnread = true; } if (!skipGetUnread) { String unreadCount = unreadCountFolders.get((int) group.id_database); if (unreadCount != null) viewHolder.txt_UnreadCount.setText(unreadCount); } int rotation = 0; int contentDescriptionId = R.string.content_desc_none; if (group.idFolder != null) { viewHolder.imgView.setVisibility(View.GONE); if (group.idFolder == ITEMS_WITHOUT_FOLDER.getValue()) { ConcreteFeedItem concreteFeedItem = ((ConcreteFeedItem) group); favIconHandler.loadFavIconForFeed(concreteFeedItem.favIcon, viewHolder.faviconView); } } else { if (group.id_database == ALL_STARRED_ITEMS.getValue()) { viewHolder.imgView.setVisibility(View.GONE); viewHolder.faviconView.setVisibility(View.VISIBLE); rotation = 0; viewHolder.faviconView.setImageResource(getBtn_rating_star_off_normal_holo_light()); } else if (getChildrenCount(groupPosition) == 0) { viewHolder.imgView.setVisibility(View.GONE); viewHolder.faviconView.setVisibility(View.INVISIBLE); } else { viewHolder.imgView.setVisibility(View.VISIBLE); viewHolder.faviconView.setVisibility(View.INVISIBLE); viewHolder.imgView.setImageResource(R.drawable.ic_action_expand_less); if (isExpanded) { rotation = 180; contentDescriptionId = R.string.content_desc_collapse; } else { if (ViewUtils.isLayoutRtl(listView)) { rotation = -90; // mirror for rtl layout } else { rotation = 90; } contentDescriptionId = R.string.content_desc_expand; } viewHolder.imgView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (isExpanded) ((ExpandableListView) listView).collapseGroup(groupPosition); else ((ExpandableListView) listView).expandGroup(groupPosition); } }); } } viewHolder.imgView.setRotation(rotation); viewHolder.imgView.setContentDescription(viewHolder.imgView.getContext().getString(contentDescriptionId)); return convertView; } private Integer btn_rating_star_off_normal_holo_light; private int getBtn_rating_star_off_normal_holo_light() { if (btn_rating_star_off_normal_holo_light == null) { if (ThemeChooser.isDarkTheme(mContext)) { btn_rating_star_off_normal_holo_light = R.drawable.ic_action_star_border_dark; } else { btn_rating_star_off_normal_holo_light = R.drawable.ic_action_star_border_light; } } return btn_rating_star_off_normal_holo_light; } static class GroupHolder { @Bind(R.id.list_item_layout) View listItemLayout; @Bind(R.id.summary) TextView txt_Summary; @Bind(R.id.tV_feedsCount) TextView txt_UnreadCount; @Bind(R.id.img_View_expandable_indicator) ImageButton imgView; @Bind(R.id.img_view_favicon) ImageView faviconView; public GroupHolder(View view) { ButterKnife.bind(this, view); } } @Override public boolean hasStableIds() { return false; } @Override public boolean isChildSelectable(int groupPosition, int childPosition) { return true; } SparseArray<String> starredCountFeeds; SparseArray<String> unreadCountFolders; SparseArray<String> unreadCountFeeds; SparseArray<String> urlsToFavIcons; public void NotifyDataSetChangedAsync() { new NotifyDataSetChangedAsyncTask().execute((Void) null); } private class NotifyDataSetChangedAsyncTask extends AsyncTask<Void, Void, Void> { SparseArray<String> starredCountFeedsTemp; SparseArray<String> unreadCountFoldersTemp; SparseArray<String> unreadCountFeedsTemp; SparseArray<String> urlsToFavIconsTemp; @Override protected Void doInBackground(Void... voids) { StopWatch stopwatch = new StopWatch(); stopwatch.start(); SparseArray<String>[] temp = dbConn.getUnreadItemCountFeedFolder(); unreadCountFoldersTemp = temp[0];// dbConn.getUnreadItemCountForFolder(); unreadCountFeedsTemp = temp[1]; // dbConn.getUnreadItemCountForFeed(); starredCountFeedsTemp = dbConn.getStarredItemCount(); urlsToFavIconsTemp = dbConn.getUrlsToFavIcons(); stopwatch.stop(); Log.v(TAG, "Fetched folder/feed counts in " + stopwatch.toString()); return null; } @Override protected void onPostExecute(Void aVoid) { if (showOnlyUnread) { for (int i = 0; i < mCategoriesArrayList.size(); i++) { AbstractItem item = mCategoriesArrayList.get(i); if (item instanceof FolderSubscribtionItem && unreadCountFoldersTemp.get(((Long) item.id_database).intValue()) == null) { Log.v(TAG, "Remove folder item!!!"); mCategoriesArrayList.remove(i); i--; } else if (item instanceof ConcreteFeedItem && unreadCountFeedsTemp.get(((Long) item.id_database).intValue()) == null) { Log.v(TAG, "Remove feed item!!!"); mCategoriesArrayList.remove(i); i--; } else { //Log.v(TAG, "Keep.. " + unreadCountFoldersTemp.get(((Long) item.id_database).intValue())); } } for (int i = 0; i < mItemsArrayList.size(); i++) { ArrayList<ConcreteFeedItem> item = mItemsArrayList.valueAt(i); for (int x = 0; x < item.size(); x++) { if (unreadCountFeedsTemp.get((int) item.get(x).id_database) == null) { item.remove(x); x--; Log.v(TAG, "Remove sub feed!!"); } } } } notifyCountDataSetChanged(unreadCountFoldersTemp, unreadCountFeedsTemp, urlsToFavIconsTemp, starredCountFeedsTemp); super.onPostExecute(aVoid); } } public void ReloadAdapterAsync() { new ReloadAdapterAsyncTask().execute((Void) null); } private class ReloadAdapterAsyncTask extends AsyncTask<Void, Void, Tuple<ArrayList<AbstractItem>, SparseArray<ArrayList<ConcreteFeedItem>>>> { public ReloadAdapterAsyncTask() { } @Override protected Tuple<ArrayList<AbstractItem>, SparseArray<ArrayList<ConcreteFeedItem>>> doInBackground( Void... voids) { StopWatch stopWatch = new StopWatch(); stopWatch.start(); Tuple<ArrayList<AbstractItem>, SparseArray<ArrayList<ConcreteFeedItem>>> ad = ReloadAdapter(); //return ReloadAdapter(); stopWatch.stop(); Log.v(TAG, "Reload Adapter - time taken: " + stopWatch.toString()); return ad; } @Override protected void onPostExecute( Tuple<ArrayList<AbstractItem>, SparseArray<ArrayList<ConcreteFeedItem>>> arrayListSparseArrayTuple) { mCategoriesArrayList = arrayListSparseArrayTuple.key; mItemsArrayList = arrayListSparseArrayTuple.value; notifyDataSetChanged(); NotifyDataSetChangedAsync(); super.onPostExecute(arrayListSparseArrayTuple); } } public Tuple<ArrayList<AbstractItem>, SparseArray<ArrayList<ConcreteFeedItem>>> ReloadAdapter() { SharedPreferences mPrefs = PreferenceManager.getDefaultSharedPreferences(mContext); showOnlyUnread = mPrefs.getBoolean(SettingsActivity.CB_SHOWONLYUNREAD_STRING, false); ArrayList<AbstractItem> mCategoriesArrayListAsync = new ArrayList<>(); mCategoriesArrayListAsync.add(new FolderSubscribtionItem(mContext.getString(R.string.allUnreadFeeds), null, ALL_UNREAD_ITEMS.getValue())); mCategoriesArrayListAsync.add(new FolderSubscribtionItem(mContext.getString(R.string.starredFeeds), null, ALL_STARRED_ITEMS.getValue())); StopWatch sw = new StopWatch(); sw.start(); List<Folder> folderList; //if(showOnlyUnread) { // folderList = dbConn.getListOfFoldersWithUnreadItems(); //} else { folderList = dbConn.getListOfFolders(); //} sw.stop(); Log.v(TAG, "Time needed (fetch folder list): " + sw.toString()); for (Folder folder : folderList) { mCategoriesArrayListAsync.add(new FolderSubscribtionItem(folder.getLabel(), null, folder.getId())); } for (Feed feed : dbConn.getListOfFeedsWithoutFolders(showOnlyUnread)) { mCategoriesArrayListAsync.add(new ConcreteFeedItem(feed.getFeedTitle(), (long) ITEMS_WITHOUT_FOLDER.getValue(), feed.getId(), feed.getFaviconUrl(), feed.getId())); } SparseArray<ArrayList<ConcreteFeedItem>> mItemsArrayListAsync = new SparseArray<>(); for (int groupPosition = 0; groupPosition < mCategoriesArrayListAsync.size(); groupPosition++) { //int parent_id = (int)getGroupId(groupPosition); int parent_id = (int) mCategoriesArrayListAsync.get(groupPosition).id_database; mItemsArrayListAsync.append(parent_id, new ArrayList<ConcreteFeedItem>()); List<Feed> feedItemList = null; if (parent_id == ALL_UNREAD_ITEMS.getValue()) { feedItemList = dbConn.getAllFeedsWithUnreadRssItems(); } else if (parent_id == ALL_STARRED_ITEMS.getValue()) { feedItemList = dbConn.getAllFeedsWithStarredRssItems(); } else { for (Folder folder : folderList) {//Find the current selected folder if (folder.getId() == parent_id) {//Current item feedItemList = dbConn.getAllFeedsWithUnreadRssItemsForFolder(folder.getId()); break; } } } if (feedItemList != null) { for (Feed feed : feedItemList) { ConcreteFeedItem newItem = new ConcreteFeedItem(feed.getFeedTitle(), (long) parent_id, feed.getId(), feed.getFaviconUrl(), feed.getId()); mItemsArrayListAsync.get(parent_id).add(newItem); } } } return new Tuple<>(mCategoriesArrayListAsync, mItemsArrayListAsync); } @SuppressLint("NewApi") // wrongly reports setSelectionFromTop is only available in lollipop public void notifyCountDataSetChanged(SparseArray<String> unreadCountFolders, SparseArray<String> unreadCountFeeds, SparseArray<String> urlsToFavIcons, SparseArray<String> starredCountFeeds) { this.unreadCountFolders = unreadCountFolders; this.unreadCountFeeds = unreadCountFeeds; this.urlsToFavIcons = urlsToFavIcons; this.starredCountFeeds = starredCountFeeds; BlockingExpandableListView bView = (BlockingExpandableListView) listView; int firstVisPos = bView.getFirstVisiblePosition(); View firstVisView = bView.getChildAt(0); int top = firstVisView != null ? firstVisView.getTop() : 0; // Number of items added before the first visible item int itemsAddedBeforeFirstVisible = 0; bView.setBlockLayoutChildren(true); notifyDataSetChanged(); bView.setBlockLayoutChildren(false); // Call setSelectionFromTop to change the ListView position if (bView.getCount() >= firstVisPos + itemsAddedBeforeFirstVisible) bView.setSelectionFromTop(firstVisPos + itemsAddedBeforeFirstVisible, top); } public void setHandlerListener(ExpListTextClicked listener) { eListTextClickHandler = listener; } protected void fireListTextClicked(long idFeed, boolean isFolder, Long optional_folder_id) { if (eListTextClickHandler != null) eListTextClickHandler.onTextClicked(idFeed, isFolder, optional_folder_id); } protected void fireListTextLongClicked(long idFeed, boolean isFolder, Long optional_folder_id) { if (eListTextClickHandler != null) eListTextClickHandler.onTextLongClicked(idFeed, isFolder, optional_folder_id); } }