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.fragment; import static com.dwdesign.tweetings.util.HtmlEscapeHelper.unescape; import static com.dwdesign.tweetings.util.Utils.buildActivatedStatsWhereClause; import static com.dwdesign.tweetings.util.Utils.buildFilterWhereClause; import static com.dwdesign.tweetings.util.Utils.getActivatedAccountIds; import static com.dwdesign.tweetings.util.Utils.getLastStatusIdsFromDatabase; import static com.dwdesign.tweetings.util.Utils.getNewestStatusIdsFromDatabase; import static com.dwdesign.tweetings.util.Utils.getTableNameForContentUri; import com.dwdesign.tweetings.activity.HomeActivity; import com.dwdesign.tweetings.adapter.CursorStatusesAdapter; import com.dwdesign.tweetings.provider.TweetStore.Mentions; import com.dwdesign.tweetings.provider.TweetStore.Statuses; import com.dwdesign.tweetings.util.AsyncTask; import com.dwdesign.tweetings.util.OnLinkClickHandler; import com.dwdesign.tweetings.util.TwidereLinkify; import android.content.BroadcastReceiver; import android.content.ContentResolver; import android.content.ContentValues; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.text.Html; import android.text.Spanned; public abstract class CursorStatusesListFragment extends BaseStatusesListFragment<Cursor> { private CursorStatusesAdapter mAdapter; private final BroadcastReceiver mStatusReceiver = new BroadcastReceiver() { @Override public void onReceive(final Context context, final Intent intent) { final String action = intent.getAction(); if (BROADCAST_ACCOUNT_LIST_DATABASE_UPDATED.equals(action) || BROADCAST_FILTERS_UPDATED.equals(action)) { if (isAdded() && !isDetached()) { getLoaderManager().restartLoader(0, null, CursorStatusesListFragment.this); } } else if (BROADCAST_TWITLONGER_EXPANDED.equals(action)) { final String expanded_status_text = intent.getStringExtra(INTENT_KEY_TWITLONGER_EXPANDED_TEXT); final String original_url = intent.getStringExtra(INTENT_KEY_TWITLONGER_ORIGINAL_URL); final String user = intent.getStringExtra(INTENT_KEY_TWITLONGER_USER); final ContentResolver resolver = context.getContentResolver(); final ContentValues values = new ContentValues(); values.put(Statuses.TEXT, expanded_status_text); values.put(Statuses.TEXT_PLAIN, unescape(expanded_status_text)); String where = Statuses.TEXT + " LIKE '%" + original_url.replace("http://", "") + "%' AND " + Statuses.SCREEN_NAME + " = '" + user + "'"; int updated = resolver.update(getContentUri(), values, where, null); if (updated > 0) { getLoaderManager().restartLoader(0, null, CursorStatusesListFragment.this); } } } }; public abstract Uri getContentUri(); public HomeActivity getHomeActivity() { final FragmentActivity activity = getActivity(); if (activity instanceof HomeActivity) return (HomeActivity) activity; return null; } @Override public long[] getLastStatusIds() { return getLastStatusIdsFromDatabase(getActivity(), getContentUri()); } @Override public CursorStatusesAdapter getListAdapter() { return mAdapter; } @Override public void onActivityCreated(final Bundle savedInstanceState) { mAdapter = new CursorStatusesAdapter(getActivity()); super.onActivityCreated(savedInstanceState); } @Override public Loader<Cursor> onCreateLoader(final int id, final Bundle args) { final String[] cols = new String[] { Statuses._ID, Statuses.ACCOUNT_ID, Statuses.STATUS_ID, Statuses.USER_ID, Statuses.STATUS_TIMESTAMP, Statuses.TEXT, Statuses.NAME, Statuses.SCREEN_NAME, Statuses.PROFILE_IMAGE_URL, Statuses.IN_REPLY_TO_SCREEN_NAME, Statuses.IN_REPLY_TO_STATUS_ID, Statuses.LOCATION, Statuses.IS_RETWEET, Statuses.RETWEET_COUNT, Statuses.RETWEET_ID, Statuses.RETWEETED_BY_NAME, Statuses.RETWEETED_BY_SCREEN_NAME, Statuses.IS_FAVORITE, Statuses.IS_PROTECTED, Statuses.IS_VERIFIED, Statuses.IS_GAP, Statuses.IS_POSSIBLY_SENSITIVE }; final Uri uri = getContentUri(); final String sort_by = getSharedPreferences().getBoolean(PREFERENCE_KEY_SORT_TIMELINE_BY_TIME, false) ? Statuses.SORT_ORDER_TIMESTAMP_DESC : Statuses.SORT_ORDER_STATUS_ID_DESC; String where = buildActivatedStatsWhereClause(getActivity(), null); if (getSharedPreferences().getBoolean(PREFERENCE_KEY_ENABLE_FILTER, false)) { final String table = getTableNameForContentUri(uri); where = buildFilterWhereClause(table, where); } return new CursorLoader(getActivity(), uri, cols, where, null, sort_by); } @Override public void onLoaderReset(final Loader<Cursor> loader) { super.onLoaderReset(loader); mAdapter.swapCursor(null); } @Override public void onLoadFinished(final Loader<Cursor> loader, final Cursor data) { super.onLoadFinished(loader, data); mAdapter.swapCursor(data); } @Override public void onPostStart() { if (!isActivityFirstCreated()) { getLoaderManager().restartLoader(0, null, this); } } @Override public void onPullDownToRefresh() { gapStatusId = -1; new AsyncTask<Void, Void, long[][]>() { @Override protected long[][] doInBackground(final Void... params) { final long[][] result = new long[3][]; result[0] = getActivatedAccountIds(getActivity()); result[2] = getNewestStatusIds(); return result; } @Override protected void onPostExecute(final long[][] result) { getStatuses(result[0], result[1], result[2]); } }.execute(); } @Override public void onPullUpToRefresh() { gapStatusId = -1; new AsyncTask<Void, Void, long[][]>() { @Override protected long[][] doInBackground(final Void... params) { final long[][] result = new long[3][]; result[0] = getActivatedAccountIds(getActivity()); result[1] = getLastStatusIds(); return result; } @Override protected void onPostExecute(final long[][] result) { getStatuses(result[0], result[1], result[2]); } }.execute(); } @Override public void onStart() { super.onStart(); final IntentFilter filter = new IntentFilter(BROADCAST_ACCOUNT_LIST_DATABASE_UPDATED); filter.addAction(BROADCAST_FILTERS_UPDATED); filter.addAction(BROADCAST_TWITLONGER_EXPANDED); registerReceiver(mStatusReceiver, filter); } @Override public void onStop() { unregisterReceiver(mStatusReceiver); super.onStop(); } @Override public long[] getNewestStatusIds() { return getNewestStatusIdsFromDatabase(getActivity(), getContentUri()); } @Override public void scrollToStatusId(long statusId) { final CursorStatusesAdapter adapter = getListAdapter(); int index = adapter.findItemPositionByStatusId(statusId); if (index >= 0 && index < adapter.getCount()) { getListView().setSelection(index); } } }