Java tutorial
/* * Twidere - Twitter client for Android * * 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 org.mariotaku.twidere.fragment; import static org.mariotaku.twidere.util.Utils.getActivatedAccountIds; import static org.mariotaku.twidere.util.Utils.getNewestMessageIdsFromDatabase; import static org.mariotaku.twidere.util.Utils.getOldestMessageIdsFromDatabase; import static org.mariotaku.twidere.util.Utils.openDirectMessagesConversation; import org.mariotaku.twidere.adapter.DirectMessagesEntryAdapter; import org.mariotaku.twidere.app.TwidereApplication; import org.mariotaku.twidere.provider.TweetStore.DirectMessages; import org.mariotaku.twidere.util.ArrayUtils; import org.mariotaku.twidere.util.AsyncTask; import org.mariotaku.twidere.util.AsyncTwitterWrapper; import org.mariotaku.twidere.util.LazyImageLoader; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.content.SharedPreferences; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.os.SystemClock; import android.support.v4.app.LoaderManager.LoaderCallbacks; import android.support.v4.content.CursorLoader; import android.support.v4.content.Loader; import android.view.MenuItem; import android.view.MotionEvent; import android.view.View; import android.view.View.OnTouchListener; import android.widget.AbsListView; import android.widget.AbsListView.OnScrollListener; import android.widget.ListView; import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode; public class DirectMessagesFragment extends PullToRefreshListFragment implements LoaderCallbacks<Cursor>, OnScrollListener, OnTouchListener { private static final long TICKER_DURATION = 5000L; private TwidereApplication mApplication; private AsyncTwitterWrapper mTwitterWrapper; private SharedPreferences mPreferences; private Handler mHandler; private Runnable mTicker; private ListView mListView; private volatile boolean mBusy, mTickerStopped, mReachedBottom, mNotReachedBottomBefore = true; private DirectMessagesEntryAdapter 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)) { if (isAdded() && !isDetached()) { getLoaderManager().restartLoader(0, null, DirectMessagesFragment.this); } } else if (BROADCAST_RECEIVED_DIRECT_MESSAGES_DATABASE_UPDATED.equals(action) || BROADCAST_SENT_DIRECT_MESSAGES_DATABASE_UPDATED.equals(action)) { getLoaderManager().restartLoader(0, null, DirectMessagesFragment.this); onRefreshComplete(); } else if (BROADCAST_RECEIVED_DIRECT_MESSAGES_REFRESHED.equals(action) || BROADCAST_SENT_DIRECT_MESSAGES_REFRESHED.equals(action)) { getLoaderManager().restartLoader(0, null, DirectMessagesFragment.this); onRefreshComplete(); } else if (BROADCAST_TASK_STATE_CHANGED.equals(action)) { if (mTwitterWrapper.isReceivedDirectMessagesRefreshing() || mTwitterWrapper.isSentDirectMessagesRefreshing()) { setRefreshing(false); } else { onRefreshComplete(); } } } }; @Override public void onActivityCreated(final Bundle savedInstanceState) { mPreferences = getSharedPreferences(SHARED_PREFERENCES_NAME, Context.MODE_PRIVATE); mTwitterWrapper = getTwitterWrapper(); super.onActivityCreated(savedInstanceState); mApplication = getApplication(); mTwitterWrapper.clearNotification(NOTIFICATION_ID_DIRECT_MESSAGES); final LazyImageLoader imageloader = getApplication().getProfileImageLoader(); mAdapter = new DirectMessagesEntryAdapter(getActivity(), imageloader); setListAdapter(mAdapter); mListView = getListView(); mListView.setOnTouchListener(this); mListView.setOnScrollListener(this); setMode(Mode.BOTH); getLoaderManager().initLoader(0, null, this); setListShown(false); } @Override public Loader<Cursor> onCreateLoader(final int id, final Bundle args) { final Uri uri = DirectMessages.ConversationsEntry.CONTENT_URI; final String where = DirectMessages.ACCOUNT_ID + " IN (" + ArrayUtils.toString(getActivatedAccountIds(getActivity()), ',', false) + ")"; return new CursorLoader(getActivity(), uri, null, where, null, null); } @Override public void onListItemClick(final ListView l, final View v, final int position, final long id) { if (mApplication.isMultiSelectActive()) return; final long conversation_id = mAdapter.getConversationId(position - l.getHeaderViewsCount()); final long account_id = mAdapter.getAccountId(position - l.getHeaderViewsCount()); if (conversation_id > 0 && account_id > 0) { openDirectMessagesConversation(getActivity(), account_id, conversation_id); } } @Override public void onLoaderReset(final Loader<Cursor> loader) { mAdapter.changeCursor(null); } @Override public void onLoadFinished(final Loader<Cursor> loader, final Cursor cursor) { if (getActivity() == null) return; mAdapter.changeCursor(cursor); mAdapter.setShowAccountColor(getActivatedAccountIds(getActivity()).length > 1); setListShown(true); } @Override public boolean onOptionsItemSelected(final MenuItem item) { switch (item.getItemId()) { case MENU_COMPOSE: { openDirectMessagesConversation(getActivity(), -1, -1); break; } } return super.onOptionsItemSelected(item); } @Override public void onPostStart() { if (!isActivityFirstCreated()) { getLoaderManager().restartLoader(0, null, this); } } @Override public void onPullDownToRefresh() { if (mTwitterWrapper == null) return; new AsyncTask<Void, Void, long[][]>() { @Override protected long[][] doInBackground(final Void... params) { final long[][] result = new long[2][]; result[0] = getActivatedAccountIds(getActivity()); result[1] = getNewestMessageIdsFromDatabase(getActivity(), DirectMessages.Inbox.CONTENT_URI); return result; } @Override protected void onPostExecute(final long[][] result) { mTwitterWrapper.getReceivedDirectMessages(result[0], null, result[1]); mTwitterWrapper.getSentDirectMessages(result[0], null, null); } }.execute(); } @Override public void onPullUpToRefresh() { if (mTwitterWrapper == null) return; new AsyncTask<Void, Void, long[][]>() { @Override protected long[][] doInBackground(final Void... params) { final long[][] result = new long[3][]; result[0] = getActivatedAccountIds(getActivity()); result[1] = getOldestMessageIdsFromDatabase(getActivity(), DirectMessages.Inbox.CONTENT_URI); result[2] = getOldestMessageIdsFromDatabase(getActivity(), DirectMessages.Outbox.CONTENT_URI); return result; } @Override protected void onPostExecute(final long[][] result) { mTwitterWrapper.getReceivedDirectMessages(result[0], result[1], null); mTwitterWrapper.getSentDirectMessages(result[0], result[2], null); } }.execute(); } @Override public void onResume() { super.onResume(); mListView.setFastScrollEnabled(mPreferences.getBoolean(PREFERENCE_KEY_FAST_SCROLL_THUMB, false)); final float text_size = mPreferences.getInt(PREFERENCE_KEY_TEXT_SIZE, PREFERENCE_DEFAULT_TEXT_SIZE); final boolean display_profile_image = mPreferences.getBoolean(PREFERENCE_KEY_DISPLAY_PROFILE_IMAGE, true); final boolean show_absolute_time = mPreferences.getBoolean(PREFERENCE_KEY_SHOW_ABSOLUTE_TIME, false); final String name_display_option = mPreferences.getString(PREFERENCE_KEY_NAME_DISPLAY_OPTION, NAME_DISPLAY_OPTION_BOTH); mAdapter.setDisplayProfileImage(display_profile_image); mAdapter.setTextSize(text_size); mAdapter.setShowAbsoluteTime(show_absolute_time); mAdapter.setNameDisplayOption(name_display_option); } @Override public void onScroll(final AbsListView view, final int firstVisibleItem, final int visibleItemCount, final int totalItemCount) { final boolean reached = firstVisibleItem + visibleItemCount >= totalItemCount && totalItemCount >= visibleItemCount; if (mReachedBottom != reached) { mReachedBottom = reached; if (mReachedBottom && mNotReachedBottomBefore) { mNotReachedBottomBefore = false; return; } } } @Override public void onScrollStateChanged(final AbsListView view, final int scrollState) { switch (scrollState) { case SCROLL_STATE_FLING: case SCROLL_STATE_TOUCH_SCROLL: mBusy = true; break; case SCROLL_STATE_IDLE: mBusy = false; break; } } @Override public void onStart() { super.onStart(); mTickerStopped = false; mHandler = new Handler(); mTicker = new Runnable() { @Override public void run() { if (mTickerStopped) return; if (mListView != null && !mBusy) { mAdapter.notifyDataSetChanged(); } final long now = SystemClock.uptimeMillis(); final long next = now + TICKER_DURATION - now % TICKER_DURATION; mHandler.postAtTime(mTicker, next); } }; mTicker.run(); final IntentFilter filter = new IntentFilter(); filter.addAction(BROADCAST_ACCOUNT_LIST_DATABASE_UPDATED); filter.addAction(BROADCAST_RECEIVED_DIRECT_MESSAGES_DATABASE_UPDATED); filter.addAction(BROADCAST_SENT_DIRECT_MESSAGES_DATABASE_UPDATED); filter.addAction(BROADCAST_RECEIVED_DIRECT_MESSAGES_REFRESHED); filter.addAction(BROADCAST_SENT_DIRECT_MESSAGES_REFRESHED); filter.addAction(BROADCAST_TASK_STATE_CHANGED); registerReceiver(mStatusReceiver, filter); if (mTwitterWrapper.isReceivedDirectMessagesRefreshing() || mTwitterWrapper.isSentDirectMessagesRefreshing()) { setRefreshing(false); } else { onRefreshComplete(); } } @Override public void onStop() { unregisterReceiver(mStatusReceiver); mTickerStopped = true; super.onStop(); } @Override public boolean onTouch(final View view, final MotionEvent ev) { switch (ev.getAction()) { case MotionEvent.ACTION_DOWN: { mTwitterWrapper.clearNotification(NOTIFICATION_ID_DIRECT_MESSAGES); break; } } return false; } }