Java tutorial
/** * Copyright (C) 2013-2014 EaseMob 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.runye.express.chat.activity; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.Iterator; import java.util.List; import java.util.Map; import java.util.Map.Entry; import android.app.ProgressDialog; import android.content.Intent; import android.os.Bundle; import android.support.v4.app.Fragment; import android.view.ContextMenu; import android.view.ContextMenu.ContextMenuInfo; import android.view.LayoutInflater; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.ViewGroup; import android.widget.AdapterView; import android.widget.AdapterView.AdapterContextMenuInfo; import android.widget.AdapterView.OnItemClickListener; import android.widget.ImageView; import android.widget.ListView; import android.widget.Toast; import com.easemob.chat.EMContactManager; import com.runye.express.activity.app.MyApplication; import com.runye.express.android.R; import com.runye.express.chat.adapter.ContactAdapter; import com.runye.express.chat.db.InviteMessgeDao; import com.runye.express.chat.db.UserDao; import com.runye.express.chat.domain.User; import com.runye.express.utils.Constant; import com.runye.express.widget.Sidebar; /** * ? * */ public class ContactlistFragment extends Fragment { private ContactAdapter adapter; private List<User> contactList; private ListView listView; private boolean hidden; private Sidebar sidebar; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.chat_fragment_contact_list, container, false); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); listView = (ListView) getView().findViewById(R.id.list); sidebar = (Sidebar) getView().findViewById(R.id.sidebar); sidebar.setListView(listView); contactList = new ArrayList<User>(); // ?contactlist getContactList(); // adapter adapter = new ContactAdapter(getActivity(), R.layout.chat_row_contact, contactList, sidebar); listView.setAdapter(adapter); listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { String username = adapter.getItem(position).getUsername(); if (Constant.NEW_FRIENDS_USERNAME.equals(username)) { // ? User user = MyApplication.getInstance().getContactList().get(Constant.NEW_FRIENDS_USERNAME); user.setUnreadMsgCount(0); startActivity(new Intent(getActivity(), NewFriendsMsgActivity.class)); } else if (Constant.GROUP_USERNAME.equals(username)) { // ?? startActivity(new Intent(getActivity(), GroupsActivity.class)); } else { // demo?? startActivity(new Intent(getActivity(), ChatActivity.class).putExtra("userId", adapter.getItem(position).getUsername())); } } }); ImageView addContactView = (ImageView) getView().findViewById(R.id.iv_new_contact); // ? addContactView.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { startActivity(new Intent(getActivity(), AddContactActivity.class)); } }); registerForContextMenu(listView); } @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_contact, menu); // } } @Override public boolean onContextItemSelected(MenuItem item) { if (item.getItemId() == R.id.delete_contact) { User tobeDeleteUser = adapter.getItem(((AdapterContextMenuInfo) item.getMenuInfo()).position); // ? deleteContact(tobeDeleteUser); // ? InviteMessgeDao dao = new InviteMessgeDao(getActivity()); dao.deleteMessage(tobeDeleteUser.getUsername()); return true; } return super.onContextItemSelected(item); } @Override public void onHiddenChanged(boolean hidden) { super.onHiddenChanged(hidden); this.hidden = hidden; if (!hidden) { refresh(); } } @Override public void onResume() { super.onResume(); if (!hidden) { refresh(); } } /** * ? * * @param toDeleteUser */ public void deleteContact(final User tobeDeleteUser) { final ProgressDialog pd = new ProgressDialog(getActivity()); pd.setMessage("..."); pd.setCanceledOnTouchOutside(false); pd.show(); new Thread(new Runnable() { @Override public void run() { try { EMContactManager.getInstance().deleteContact(tobeDeleteUser.getUsername()); // db? UserDao dao = new UserDao(getActivity()); dao.deleteContact(tobeDeleteUser.getUsername()); MyApplication.getInstance().getContactList().remove(tobeDeleteUser.getUsername()); getActivity().runOnUiThread(new Runnable() { @Override public void run() { pd.dismiss(); adapter.remove(tobeDeleteUser); adapter.notifyDataSetChanged(); } }); } catch (final Exception e) { getActivity().runOnUiThread(new Runnable() { @Override public void run() { pd.dismiss(); Toast.makeText(getActivity(), ": " + e.getMessage(), 1).show(); } }); } } }).start(); } // ui public void refresh() { try { // ?? getActivity().runOnUiThread(new Runnable() { @Override public void run() { getContactList(); adapter.notifyDataSetChanged(); } }); } catch (Exception e) { e.printStackTrace(); } } private void getContactList() { contactList.clear(); Map<String, User> users = MyApplication.getInstance().getContactList(); Iterator<Entry<String, User>> iterator = users.entrySet().iterator(); while (iterator.hasNext()) { Entry<String, User> entry = iterator.next(); if (!entry.getKey().equals(Constant.NEW_FRIENDS_USERNAME) && !entry.getKey().equals(Constant.GROUP_USERNAME)) contactList.add(entry.getValue()); } // ? Collections.sort(contactList, new Comparator<User>() { @Override public int compare(User lhs, User rhs) { return lhs.getUsername().compareTo(rhs.getUsername()); } }); // """?" contactList.add(0, users.get(Constant.GROUP_USERNAME)); // ""? contactList.add(0, users.get(Constant.NEW_FRIENDS_USERNAME)); } }