Java tutorial
/** * Copyright (c) 2013, Redsolution LTD. All rights reserved. * * This file is part of Xabber project; you can redistribute it and/or * modify it under the terms of the GNU General Public License, Version 3. * * Xabber 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.xabber.android.ui; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.support.v4.view.ViewPager; import android.view.View; import android.view.WindowManager; import android.view.inputmethod.InputMethodManager; import android.widget.LinearLayout; import com.xabber.android.R; import com.xabber.android.data.ActivityManager; import com.xabber.android.data.Application; import com.xabber.android.data.SettingsManager; import com.xabber.android.data.account.OnAccountChangedListener; import com.xabber.android.data.entity.BaseEntity; import com.xabber.android.data.extension.archive.MessageArchiveManager; import com.xabber.android.data.extension.attention.AttentionManager; import com.xabber.android.data.intent.EntityIntentBuilder; import com.xabber.android.data.message.AbstractChat; import com.xabber.android.data.message.MessageManager; import com.xabber.android.data.message.OnChatChangedListener; import com.xabber.android.data.notification.NotificationManager; import com.xabber.android.data.roster.OnContactChangedListener; import com.xabber.android.ui.adapter.ChatScrollIndicatorAdapter; import com.xabber.android.ui.adapter.ChatViewerAdapter; import com.xabber.android.ui.helper.ManagedActivity; import com.xabber.android.ui.helper.StatusBarPainter; import java.util.Collection; import java.util.HashSet; /** * Chat activity. * <p/> * * @author alexander.ivanov */ public class ChatViewer extends ManagedActivity implements OnChatChangedListener, OnContactChangedListener, OnAccountChangedListener, ViewPager.OnPageChangeListener, ChatViewerAdapter.FinishUpdateListener, RecentChatFragment.RecentChatFragmentInteractionListener, ChatViewerFragment.ChatViewerFragmentListener { /** * Attention request. */ private static final String ACTION_ATTENTION = "com.xabber.android.data.ATTENTION"; private static final String ACTION_RECENT_CHATS = "com.xabber.android.data.RECENT_CHATS"; private static final String ACTION_SPECIFIC_CHAT = "com.xabber.android.data.ACTION_SPECIFIC_CHAT"; private static final String ACTION_SHORTCUT = "com.xabber.android.data.ACTION_SHORTCUT"; private static final String SAVED_INITIAL_ACCOUNT = "com.xabber.android.ui.ChatViewer.SAVED_INITIAL_ACCOUNT"; private static final String SAVED_INITIAL_USER = "com.xabber.android.ui.ChatViewer.SAVED_INITIAL_USER"; private static final String SAVED_IS_RECENT_CHATS_SELECTED = "com.xabber.android.ui.ChatViewer.SAVED_IS_RECENT_CHATS_SELECTED"; private static final String SAVED_SELECTED_ACCOUNT = "com.xabber.android.ui.ChatViewer.SAVED_SELECTED_ACCOUNT"; private static final String SAVED_SELECTED_USER = "com.xabber.android.ui.ChatViewer.SAVED_SELECTED_USER"; private static final String SAVED_EXIT_ON_SEND = "com.xabber.android.ui.ChatViewer.EXIT_ON_SEND"; ChatScrollIndicatorAdapter chatScrollIndicatorAdapter; ChatViewerAdapter chatViewerAdapter; ViewPager viewPager; Collection<ChatViewerFragment> registeredChats = new HashSet<>(); Collection<RecentChatFragment> recentChatFragments = new HashSet<>(); private boolean exitOnSend; private String extraText = null; private BaseEntity initialChat = null; private BaseEntity selectedChat = null; private StatusBarPainter statusBarPainter; private boolean isRecentChatsSelected; private boolean isVisible; public static void hideKeyboard(Activity activity) { // Check if no view has focus: View view = activity.getCurrentFocus(); if (view != null) { InputMethodManager inputManager = (InputMethodManager) activity .getSystemService(Context.INPUT_METHOD_SERVICE); inputManager.hideSoftInputFromWindow(view.getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS); } } private static String getAccount(Intent intent) { String value = EntityIntentBuilder.getAccount(intent); if (value != null) return value; // Backward compatibility. return intent.getStringExtra("com.xabber.android.data.account"); } private static String getUser(Intent intent) { String value = EntityIntentBuilder.getUser(intent); if (value != null) return value; // Backward compatibility. return intent.getStringExtra("com.xabber.android.data.user"); } private static boolean hasAttention(Intent intent) { return ACTION_ATTENTION.equals(intent.getAction()); } public static Intent createSpecificChatIntent(Context context, String account, String user) { Intent intent = new EntityIntentBuilder(context, ChatViewer.class).setAccount(account).setUser(user) .build(); intent.setAction(ACTION_SPECIFIC_CHAT); return intent; } public static Intent createRecentChatsIntent(Context context) { Intent intent = new EntityIntentBuilder(context, ChatViewer.class).build(); intent.setAction(ACTION_RECENT_CHATS); return intent; } public static Intent createClearTopIntent(Context context, String account, String user) { Intent intent = createSpecificChatIntent(context, account, user); intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); return intent; } public static Intent createShortCutIntent(Context context, String account, String user) { Intent intent = createClearTopIntent(context, account, user); intent.setAction(ACTION_SHORTCUT); return intent; } /** * Create intent to send message. * <p/> * Contact list will not be shown on when chat will be closed. * * @param context * @param account * @param user * @param text if <code>null</code> then user will be able to send a number * of messages. Else only one message can be send. * @return */ public static Intent createSendIntent(Context context, String account, String user, String text) { Intent intent = ChatViewer.createSpecificChatIntent(context, account, user); intent.setAction(Intent.ACTION_SEND); intent.putExtra(Intent.EXTRA_TEXT, text); return intent; } public static Intent createAttentionRequestIntent(Context context, String account, String user) { Intent intent = ChatViewer.createClearTopIntent(context, account, user); intent.setAction(ACTION_ATTENTION); return intent; } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (isFinishing()) { return; } setContentView(R.layout.chat_viewer); statusBarPainter = new StatusBarPainter(this); getWindow().setSoftInputMode(WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN); getInitialChatFromIntent(); getSelectedPageDataFromIntent(); if (savedInstanceState != null) { restoreInstanceState(savedInstanceState); } initChats(); } private void initChats() { if (initialChat != null) { chatViewerAdapter = new ChatViewerAdapter(getFragmentManager(), initialChat, this); } else { chatViewerAdapter = new ChatViewerAdapter(getFragmentManager(), this); } viewPager = (ViewPager) findViewById(R.id.pager); viewPager.setAdapter(chatViewerAdapter); viewPager.setOnPageChangeListener(this); if (SettingsManager.chatsShowBackground()) { viewPager.setBackgroundDrawable(getResources().getDrawable(R.drawable.chat_background_repeat)); } chatScrollIndicatorAdapter = new ChatScrollIndicatorAdapter(this, (LinearLayout) findViewById(R.id.chat_scroll_indicator)); chatScrollIndicatorAdapter.update(chatViewerAdapter.getActiveChats()); } private void getInitialChatFromIntent() { Intent intent = getIntent(); String account = getAccount(intent); String user = getUser(intent); if (account != null && user != null) { initialChat = new BaseEntity(account, user); } } private void getSelectedPageDataFromIntent() { Intent intent = getIntent(); if (intent.getAction() == null) { return; } switch (intent.getAction()) { case ACTION_RECENT_CHATS: isRecentChatsSelected = true; selectedChat = null; break; case ACTION_SPECIFIC_CHAT: case ACTION_ATTENTION: case Intent.ACTION_SEND: case ACTION_SHORTCUT: isRecentChatsSelected = false; selectedChat = new BaseEntity(getAccount(intent), getUser(intent)); break; } } @Override protected void onNewIntent(Intent intent) { super.onNewIntent(intent); if (isFinishing()) { return; } setIntent(intent); getSelectedPageDataFromIntent(); if (intent.getAction() != null && intent.getAction().equals(ACTION_SHORTCUT)) { getInitialChatFromIntent(); initChats(); } } private void restoreInstanceState(Bundle savedInstanceState) { isRecentChatsSelected = savedInstanceState.getBoolean(SAVED_IS_RECENT_CHATS_SELECTED); if (isRecentChatsSelected) { selectedChat = null; } else { selectedChat = new BaseEntity(savedInstanceState.getString(SAVED_SELECTED_ACCOUNT), savedInstanceState.getString(SAVED_SELECTED_USER)); } exitOnSend = savedInstanceState.getBoolean(SAVED_EXIT_ON_SEND); String initialAccount = savedInstanceState.getString(SAVED_INITIAL_ACCOUNT); String initialUser = savedInstanceState.getString(SAVED_INITIAL_USER); if (initialAccount != null && initialUser != null) { initialChat = new BaseEntity(initialAccount, initialUser); } } @Override protected void onResume() { super.onResume(); isVisible = true; Application.getInstance().addUIListener(OnChatChangedListener.class, this); Application.getInstance().addUIListener(OnContactChangedListener.class, this); Application.getInstance().addUIListener(OnAccountChangedListener.class, this); chatViewerAdapter.updateChats(); chatScrollIndicatorAdapter.update(chatViewerAdapter.getActiveChats()); selectPage(); Intent intent = getIntent(); if (hasAttention(intent)) { AttentionManager.getInstance().removeAccountNotifications(selectedChat); } if (Intent.ACTION_SEND.equals(intent.getAction())) { extraText = intent.getStringExtra(Intent.EXTRA_TEXT); if (extraText != null) { intent.removeExtra(Intent.EXTRA_TEXT); exitOnSend = true; } } } private void selectPage() { if (isRecentChatsSelected) { selectRecentChatsPage(); } else { selectChatPage(selectedChat, false); } } @Override protected void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); outState.putBoolean(SAVED_IS_RECENT_CHATS_SELECTED, isRecentChatsSelected); if (!isRecentChatsSelected) { outState.putString(SAVED_SELECTED_ACCOUNT, selectedChat.getAccount()); outState.putString(SAVED_SELECTED_USER, selectedChat.getUser()); } outState.putBoolean(SAVED_EXIT_ON_SEND, exitOnSend); outState.putString(SAVED_INITIAL_ACCOUNT, initialChat.getAccount()); outState.putString(SAVED_INITIAL_USER, initialChat.getUser()); } @Override protected void onPause() { super.onPause(); Application.getInstance().removeUIListener(OnChatChangedListener.class, this); Application.getInstance().removeUIListener(OnContactChangedListener.class, this); Application.getInstance().removeUIListener(OnAccountChangedListener.class, this); MessageManager.getInstance().removeVisibleChat(); isVisible = false; } private void selectChatPage(BaseEntity chat, boolean smoothScroll) { selectPage(chatViewerAdapter.getPageNumber(chat), smoothScroll); } private void selectRecentChatsPage() { selectPage(chatViewerAdapter.getPageNumber(null), false); } private void selectPage(int position, boolean smoothScroll) { onPageSelected(position); viewPager.setCurrentItem(position, smoothScroll); } @Override public void onChatChanged(final String account, final String user, final boolean incoming) { if (chatViewerAdapter.updateChats()) { chatScrollIndicatorAdapter.update(chatViewerAdapter.getActiveChats()); selectPage(); } else { for (ChatViewerFragment chat : registeredChats) { if (chat.isEqual(selectedChat)) { chat.updateChat(); if (incoming) { chat.playIncomingAnimation(); } } } updateRegisteredRecentChatsFragments(); updateStatusBar(); } } @Override public void onContactsChanged(Collection<BaseEntity> entities) { for (BaseEntity contact : entities) { for (ChatViewerFragment chat : registeredChats) { if (chat.isEqual(contact)) { chat.updateChat(); } } } updateRegisteredRecentChatsFragments(); updateStatusBar(); } @Override public void onAccountsChanged(Collection<String> accounts) { updateRegisteredChats(); updateRegisteredRecentChatsFragments(); updateStatusBar(); } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { hideKeyboard(this); chatScrollIndicatorAdapter.select(chatViewerAdapter.getRealPagePosition(position)); selectedChat = chatViewerAdapter.getChatByPageNumber(position); isRecentChatsSelected = selectedChat == null; if (isRecentChatsSelected) { MessageManager.getInstance().removeVisibleChat(); } else { if (isVisible) { MessageManager.getInstance().setVisibleChat(selectedChat); } MessageArchiveManager.getInstance().requestHistory(selectedChat.getAccount(), selectedChat.getUser(), 0, MessageManager.getInstance().getChat(selectedChat.getAccount(), selectedChat.getUser()) .getRequiredMessageCount()); NotificationManager.getInstance().removeMessageNotification(selectedChat.getAccount(), selectedChat.getUser()); } updateStatusBar(); } private void updateStatusBar() { if (isRecentChatsSelected) { statusBarPainter.updateWithDefaultColor(); } else { statusBarPainter.updateWithAccountName(selectedChat.getAccount()); } } private void updateRegisteredChats() { for (ChatViewerFragment chat : registeredChats) { chat.updateChat(); } } private void updateRegisteredRecentChatsFragments() { for (RecentChatFragment recentChatFragment : recentChatFragments) { recentChatFragment.updateChats(chatViewerAdapter.getActiveChats()); } } @Override public void onPageScrollStateChanged(int state) { } public void registerRecentChatsList(RecentChatFragment recentChatFragment) { recentChatFragments.add(recentChatFragment); } public void unregisterRecentChatsList(RecentChatFragment recentChatFragment) { recentChatFragments.remove(recentChatFragment); } @Override public void onChatViewAdapterFinishUpdate() { insertExtraText(); } private void insertExtraText() { if (extraText == null) { return; } boolean isExtraTextInserted = false; for (ChatViewerFragment chat : registeredChats) { if (chat.isEqual(selectedChat)) { chat.setInputText(extraText); isExtraTextInserted = true; } } if (isExtraTextInserted) { extraText = null; } } @Override public void onChatSelected(AbstractChat chat) { selectChatPage(chat, true); } public ChatViewerAdapter getChatViewerAdapter() { return chatViewerAdapter; } @Override public void onCloseChat() { close(); } @Override public void onMessageSent() { if (exitOnSend) { close(); } } @Override public void registerChat(ChatViewerFragment chat) { registeredChats.add(chat); } @Override public void unregisterChat(ChatViewerFragment chat) { registeredChats.remove(chat); } private void close() { finish(); if (!Intent.ACTION_SEND.equals(getIntent().getAction())) { ActivityManager.getInstance().clearStack(false); if (!ActivityManager.getInstance().hasContactList(this)) { startActivity(ContactList.createIntent(this)); } } } }