Java tutorial
/** * spaRSS * <p/> * Copyright (c) 2015-2016 Arnaud Renaud-Goud * Copyright (c) 2012-2015 Frederic Julian * <p/> * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * <p/> * This program 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 General Public License for more details. * <p/> * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ package social.news.inrss.adapter; import android.content.Context; import android.database.Cursor; import android.graphics.Bitmap; import android.support.v4.content.ContextCompat; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ImageView; import android.widget.TextView; import social.news.inrss.MainApplication; import social.news.inrss.R; import social.news.inrss.provider.FeedData; import social.news.inrss.provider.FeedData.EntryColumns; import social.news.inrss.utils.PrefUtils; import social.news.inrss.utils.StringUtils; import social.news.inrss.utils.UiUtils; import java.util.LinkedHashMap; import java.util.Map; public class DrawerAdapter extends BaseAdapter { private static final int POS_ID = 0; private static final int POS_URL = 1; private static final int POS_NAME = 2; private static final int POS_IS_GROUP = 3; private static final int POS_ICON = 4; private static final int POS_LAST_UPDATE = 5; private static final int POS_ERROR = 6; private static final int POS_UNREAD = 7; private static final String COLON = MainApplication.getContext().getString(R.string.colon); private static final int CACHE_MAX_ENTRIES = 100; private final Map<Long, String> mFormattedDateCache = new LinkedHashMap<Long, String>(CACHE_MAX_ENTRIES + 1, .75F, true) { @Override public boolean removeEldestEntry(Map.Entry<Long, String> eldest) { return size() > CACHE_MAX_ENTRIES; } }; private int mSelectedItem; private final Context mContext; private Cursor mFeedsCursor; private int mAllUnreadNumber, mFavoritesNumber; public DrawerAdapter(Context context, Cursor feedCursor) { mContext = context; mFeedsCursor = feedCursor; updateNumbers(); } public void setSelectedItem(int selectedItem) { mSelectedItem = selectedItem; } public void setCursor(Cursor feedCursor) { mFeedsCursor = feedCursor; updateNumbers(); notifyDataSetChanged(); } @Override public View getView(int position, View convertView, ViewGroup parent) { if (convertView == null) { LayoutInflater inflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflater.inflate(R.layout.item_drawer_list, parent, false); ViewHolder holder = new ViewHolder(); holder.iconView = (ImageView) convertView.findViewById(android.R.id.icon); holder.titleTxt = (TextView) convertView.findViewById(android.R.id.text1); holder.stateTxt = (TextView) convertView.findViewById(android.R.id.text2); holder.unreadTxt = (TextView) convertView.findViewById(R.id.unread_count); holder.separator = convertView.findViewById(R.id.separator); holder.separator.setBackgroundColor(ContextCompat.getColor(mContext, PrefUtils.getBoolean(PrefUtils.LIGHT_THEME, true) ? R.color.light_dividers : R.color.dark_dividers)); convertView.setTag(R.id.holder, holder); } ViewHolder holder = (ViewHolder) convertView.getTag(R.id.holder); if (holder != null) { if (position == mSelectedItem) { holder.titleTxt.setTextColor(ContextCompat.getColor(mContext, PrefUtils.getBoolean(PrefUtils.LIGHT_THEME, true) ? R.color.light_primary_color : R.color.dark_primary_color)); } else { holder.titleTxt.setTextColor(ContextCompat.getColor(mContext, PrefUtils.getBoolean(PrefUtils.LIGHT_THEME, true) ? R.color.light_base_text : R.color.dark_base_text)); } // default init holder.iconView.setImageDrawable(null); holder.titleTxt.setText(""); holder.titleTxt.setAllCaps(false); holder.stateTxt.setVisibility(View.GONE); holder.unreadTxt.setText(""); convertView.setPadding(0, 0, 0, 0); holder.separator.setVisibility(View.GONE); if (position == 0 || position == 1) { holder.titleTxt.setText(position == 0 ? R.string.all : R.string.favorites); holder.iconView.setImageResource(position == 0 ? R.drawable.ic_statusbar_rss : R.drawable.ic_star); if (position == mSelectedItem) { holder.iconView.setColorFilter(ContextCompat.getColor(mContext, PrefUtils.getBoolean(PrefUtils.LIGHT_THEME, true) ? R.color.light_primary_color : R.color.dark_primary_color)); } else { holder.iconView.setColorFilter(ContextCompat.getColor(mContext, PrefUtils.getBoolean(PrefUtils.LIGHT_THEME, true) ? R.color.light_base_text : R.color.dark_base_text)); } int unread = position == 0 ? mAllUnreadNumber : mFavoritesNumber; if (unread != 0) { holder.unreadTxt.setText(String.valueOf(unread)); } } if (mFeedsCursor != null && mFeedsCursor.moveToPosition(position - 2)) { holder.titleTxt.setText((mFeedsCursor.isNull(POS_NAME) ? mFeedsCursor.getString(POS_URL) : mFeedsCursor.getString(POS_NAME))); if (mFeedsCursor.getInt(POS_IS_GROUP) == 1) { holder.titleTxt.setAllCaps(true); holder.separator.setVisibility(View.VISIBLE); holder.iconView.setImageResource(R.drawable.ic_folder); if (position == mSelectedItem) { holder.iconView.setColorFilter(ContextCompat.getColor(mContext, PrefUtils.getBoolean(PrefUtils.LIGHT_THEME, true) ? R.color.light_primary_color : R.color.dark_primary_color)); } else { holder.iconView.setColorFilter(ContextCompat.getColor(mContext, PrefUtils.getBoolean(PrefUtils.LIGHT_THEME, true) ? R.color.light_base_text : R.color.dark_base_text)); } } else { holder.stateTxt.setVisibility(View.VISIBLE); if (mFeedsCursor.isNull(POS_ERROR)) { long timestamp = mFeedsCursor.getLong(POS_LAST_UPDATE); // Date formatting is expensive, look at the cache String formattedDate = mFormattedDateCache.get(timestamp); if (formattedDate == null) { formattedDate = mContext.getString(R.string.update) + COLON; if (timestamp == 0) { formattedDate += mContext.getString(R.string.never); } else { formattedDate += StringUtils.getDateTimeString(timestamp); } mFormattedDateCache.put(timestamp, formattedDate); } holder.stateTxt.setText(formattedDate); } else { holder.stateTxt.setText(new StringBuilder(mContext.getString(R.string.error)).append(COLON) .append(mFeedsCursor.getString(POS_ERROR))); } final long feedId = mFeedsCursor.getLong(POS_ID); Bitmap bitmap = UiUtils.getFaviconBitmap(feedId, mFeedsCursor, POS_ICON); if (bitmap != null) { holder.iconView.setImageBitmap(bitmap); } else { holder.iconView.setImageResource(R.mipmap.ic_launcher); } int unread = mFeedsCursor.getInt(POS_UNREAD); if (unread != 0) { holder.unreadTxt.setText(String.valueOf(unread)); } } if ((mFeedsCursor.isNull(POS_NAME) ? mFeedsCursor.getString(POS_URL) : mFeedsCursor.getString(POS_NAME)).startsWith("ERROR:")) { LayoutInflater inflater = (LayoutInflater) mContext .getSystemService(Context.LAYOUT_INFLATER_SERVICE); convertView = inflater.inflate(R.layout.item_drawer_null, parent, false); return convertView; } } } return convertView; } @Override public int getCount() { if (mFeedsCursor != null) { return mFeedsCursor.getCount() + 2; } return 0; } @Override public Object getItem(int position) { return null; } @Override public long getItemId(int position) { if (mFeedsCursor != null && mFeedsCursor.moveToPosition(position - 2)) { return mFeedsCursor.getLong(POS_ID); } return -1; } public byte[] getItemIcon(int position) { if (mFeedsCursor != null && mFeedsCursor.moveToPosition(position - 2)) { return mFeedsCursor.getBlob(POS_ICON); } return null; } public String getItemName(int position) { if (mFeedsCursor != null && mFeedsCursor.moveToPosition(position - 2)) { return mFeedsCursor.isNull(POS_NAME) ? mFeedsCursor.getString(POS_URL) : mFeedsCursor.getString(POS_NAME); } return null; } public boolean isItemAGroup(int position) { return mFeedsCursor != null && mFeedsCursor.moveToPosition(position - 2) && mFeedsCursor.getInt(POS_IS_GROUP) == 1; } private void updateNumbers() { mAllUnreadNumber = mFavoritesNumber = 0; // Gets the numbers of entries (should be in a thread, but it's way easier like this and it shouldn't be so slow) Cursor numbers = mContext.getContentResolver().query(EntryColumns.CONTENT_URI, new String[] { FeedData.ALL_UNREAD_NUMBER, FeedData.FAVORITES_NUMBER }, null, null, null); if (numbers != null) { if (numbers.moveToFirst()) { mAllUnreadNumber = numbers.getInt(0); mFavoritesNumber = numbers.getInt(1); } numbers.close(); } } private static class ViewHolder { public ImageView iconView; public TextView titleTxt; public TextView stateTxt; public TextView unreadTxt; public View separator; } }