Java tutorial
/** * Copyright (C) 2013-2014 ZhiXu Technologies. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * http://www.apache.org/licenses/LICENSE-2.0 * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.zhixu.icu.activity; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.Hashtable; import java.util.List; import java.util.Map; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.Fragment; import android.text.Editable; import android.text.TextWatcher; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.LayoutInflater; import android.view.MenuItem; import android.view.MotionEvent; import android.view.View; import android.view.View.OnClickListener; import android.view.View.OnTouchListener; import android.view.ViewGroup; import android.view.WindowManager; import android.view.inputmethod.InputMethodManager; import android.widget.AdapterView; import android.widget.AdapterView.AdapterContextMenuInfo; import android.widget.AdapterView.OnItemClickListener; import android.widget.EditText; import android.widget.ImageButton; import android.widget.ListView; import android.widget.RelativeLayout; import android.widget.TextView; import android.widget.Toast; import com.easemob.chat.EMChatManager; import com.easemob.chat.EMContact; import com.easemob.chat.EMConversation; import com.easemob.chat.EMGroup; import com.easemob.chat.EMGroupManager; import com.easemob.chat.EMMessage; import com.easemob.chat.GroupChangeListener; import com.zhixu.icu.DemoApplication; import com.zhixu.icu.R; import com.zhixu.icu.adapter.ChatHistoryAdapter; import com.zhixu.icu.db.InviteMessgeDao; import com.zhixu.icu.domain.User; /** * ?Fragment * */ public class ChatHistoryFragment extends Fragment { private InputMethodManager inputMethodManager; private ListView listView; private Map<String, User> contactList; private ChatHistoryAdapter adapter; private EditText query; private ImageButton clearSearch; public RelativeLayout errorItem; public TextView errorText; private boolean hidden; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.fragment_conversation_history, container, false); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); inputMethodManager = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE); errorItem = (RelativeLayout) getView().findViewById(R.id.rl_error_item); errorText = (TextView) errorItem.findViewById(R.id.tv_connect_errormsg); // contact list contactList = DemoApplication.getInstance().getContactList(); listView = (ListView) getView().findViewById(R.id.list); adapter = new ChatHistoryAdapter(getActivity(), 1, loadUsersWithRecentChat()); // adapter listView.setAdapter(adapter); listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { EMContact emContact = adapter.getItem(position); if (adapter.getItem(position).getUsername().equals(DemoApplication.getInstance().getUserName())) Toast.makeText(getActivity(), "??", 0).show(); else { // ?? Intent intent = new Intent(getActivity(), ChatActivity.class); if (emContact instanceof EMGroup) { //it is group chat intent.putExtra("chatType", ChatActivity.CHATTYPE_GROUP); intent.putExtra("groupId", ((EMGroup) emContact).getGroupId()); } else { //it is single chat intent.putExtra("userId", emContact.getUsername()); } startActivity(intent); } } }); // ?? registerForContextMenu(listView); listView.setOnTouchListener(new OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { // ?? if (getActivity().getWindow() .getAttributes().softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN) { if (getActivity().getCurrentFocus() != null) inputMethodManager.hideSoftInputFromWindow(getActivity().getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS); } return false; } }); // ? query = (EditText) getView().findViewById(R.id.query); // ?button clearSearch = (ImageButton) getView().findViewById(R.id.search_clear); query.addTextChangedListener(new TextWatcher() { public void onTextChanged(CharSequence s, int start, int before, int count) { adapter.getFilter().filter(s); if (s.length() > 0) { clearSearch.setVisibility(View.VISIBLE); } else { clearSearch.setVisibility(View.INVISIBLE); } } public void beforeTextChanged(CharSequence s, int start, int count, int after) { } public void afterTextChanged(Editable s) { } }); clearSearch.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { query.getText().clear(); } }); } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, v, menuInfo); // if(((AdapterContextMenuInfo)menuInfo).position > 0){ m, getActivity().getMenuInflater().inflate(R.menu.delete_message, menu); // } } @Override public boolean onContextItemSelected(MenuItem item) { if (item.getItemId() == R.id.delete_message) { EMContact tobeDeleteUser = adapter.getItem(((AdapterContextMenuInfo) item.getMenuInfo()).position); boolean isGroup = false; if (tobeDeleteUser instanceof EMGroup) isGroup = true; // ? EMChatManager.getInstance().deleteConversation(tobeDeleteUser.getUsername(), isGroup); InviteMessgeDao inviteMessgeDao = new InviteMessgeDao(getActivity()); inviteMessgeDao.deleteMessage(tobeDeleteUser.getUsername()); adapter.remove(tobeDeleteUser); adapter.notifyDataSetChanged(); // ? ((MainActivity) getActivity()).updateUnreadLabel(); return true; } return super.onContextItemSelected(item); } /** * ? */ public void refresh() { adapter = new ChatHistoryAdapter(getActivity(), R.layout.row_chat_history, loadUsersWithRecentChat()); listView.setAdapter(adapter); adapter.notifyDataSetChanged(); } /** * ??usersgroups * * @param context * @return */ private List<EMContact> loadUsersWithRecentChat() { List<EMContact> resultList = new ArrayList<EMContact>(); //??users? for (User user : contactList.values()) { EMConversation conversation = EMChatManager.getInstance().getConversation(user.getUsername()); if (conversation.getMsgCount() > 0) { resultList.add(user); } } for (EMGroup group : EMGroupManager.getInstance().getAllGroups()) { EMConversation conversation = EMChatManager.getInstance().getConversation(group.getGroupId()); if (conversation.getMsgCount() > 0) { resultList.add(group); } } // ? sortUserByLastChatTime(resultList); return resultList; } /** * ????? * * @param usernames */ private void sortUserByLastChatTime(List<EMContact> contactList) { Collections.sort(contactList, new Comparator<EMContact>() { @Override public int compare(final EMContact user1, final EMContact user2) { EMConversation conversation1 = EMChatManager.getInstance().getConversation(user1.getUsername()); EMConversation conversation2 = EMChatManager.getInstance().getConversation(user2.getUsername()); EMMessage user2LastMessage = conversation2.getLastMessage(); EMMessage user1LastMessage = conversation1.getLastMessage(); if (user2LastMessage.getMsgTime() == user1LastMessage.getMsgTime()) { return 0; } else if (user2LastMessage.getMsgTime() > user1LastMessage.getMsgTime()) { return 1; } else { return -1; } } }); } @Override public void onHiddenChanged(boolean hidden) { super.onHiddenChanged(hidden); this.hidden = hidden; if (!hidden) { refresh(); } } @Override public void onResume() { super.onResume(); if (!hidden) { refresh(); } } }