Java tutorial
/* * Tweetings - Twitter client for Android * * Copyright (C) 2012-2013 RBD Solutions Limited <apps@tweetings.net> * Copyright (C) 2012 Mariotaku Lee <mariotaku.lee@gmail.com> * * 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. * * 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. * * 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 com.dwdesign.tweetings.loader; import static com.dwdesign.tweetings.util.Utils.getInlineImagePreviewDisplayOptionInt; import static com.dwdesign.tweetings.util.Utils.isFiltered; import java.util.ArrayList; import java.util.Collections; import java.util.List; import com.dwdesign.tweetings.app.TweetingsApplication; import com.dwdesign.tweetings.model.ParcelableStatus; import com.dwdesign.tweetings.util.SynchronizedStateSavedList; import twitter4j.Paging; import twitter4j.Status; import twitter4j.TwitterException; import android.content.Context; import android.content.SharedPreferences; import android.database.sqlite.SQLiteDatabase; import android.util.Log; import java.util.ConcurrentModificationException; public abstract class Twitter4JStatusLoader extends ParcelableStatusesLoader { private final long mMaxId, mSinceId; private final int mInlineImagePreviewDisplayOption; public Twitter4JStatusLoader(final Context context, final long account_id, final long max_id, final long since_id, final List<ParcelableStatus> data, final String class_name, final boolean is_home_tab) { super(context, account_id, data, class_name, is_home_tab); mMaxId = max_id; mSinceId = since_id; final String inline_image_preview_display_option = context .getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE) .getString(PREFERENCE_KEY_INLINE_IMAGE_PREVIEW_DISPLAY_OPTION, INLINE_IMAGE_PREVIEW_DISPLAY_OPTION_SMALL); mInlineImagePreviewDisplayOption = getInlineImagePreviewDisplayOptionInt( inline_image_preview_display_option); } public abstract List<Status> getStatuses(Paging paging) throws TwitterException; @SuppressWarnings("unchecked") @Override public SynchronizedStateSavedList<ParcelableStatus, Long> loadInBackground() { final SynchronizedStateSavedList<ParcelableStatus, Long> data = getData(); List<Status> statuses = null; final Context context = getContext(); final SharedPreferences prefs = context.getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE); final int load_item_limit = prefs.getInt(PREFERENCE_KEY_LOAD_ITEM_LIMIT, PREFERENCE_DEFAULT_LOAD_ITEM_LIMIT); try { final Paging paging = new Paging(); paging.setCount(load_item_limit); if (mMaxId > 0) { paging.setMaxId(mMaxId); } if (mSinceId > 0) { paging.setSinceId(mSinceId); } statuses = getStatuses(paging); } catch (final TwitterException e) { e.printStackTrace(); } if (statuses != null) { final boolean insert_gap = load_item_limit == statuses.size() && data.size() > 0; final Status min_status = statuses.size() > 0 ? Collections.min(statuses) : null; final long min_status_id = min_status != null ? min_status.getId() : -1; for (final Status status : statuses) { final long id = status.getId(); deleteStatus(id); data.add(new ParcelableStatus(status, mAccountId, min_status_id > 0 && min_status_id == id && insert_gap, mInlineImagePreviewDisplayOption == INLINE_IMAGE_PREVIEW_DISPLAY_OPTION_CODE_LARGE_HIGH)); } } try { final List<ParcelableStatus> statuses_to_remove = new ArrayList<ParcelableStatus>(); for (final ParcelableStatus status : data) { if (isFiltered(context, status.screen_name, status.source, status.text_plain) && !status.is_gap) { statuses_to_remove.add(status); } } data.removeAll(statuses_to_remove); Collections.sort(data); } catch (final ConcurrentModificationException e) { Log.w(LOGTAG, e); } return data; } }