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.easemob.qixin.activity; import java.util.ArrayList; import java.util.Collections; import java.util.Comparator; import java.util.Hashtable; import java.util.List; import android.content.Context; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.support.v4.app.Fragment; import android.text.Editable; import android.text.TextWatcher; import android.util.Pair; 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 com.easemob.chat.EMChatManager; import com.easemob.chat.EMConversation; import com.easemob.qixin.Constant; import com.easemob.qixin.DemoApplication; import com.easemob.qixin.R; import com.easemob.qixin.adapter.ContactAdapter; import com.easemob.qixin.parse.QXUser; import com.easemob.qixin.widget.Sidebar; /** * ? * */ public class ContactlistFragment extends Fragment implements OnClickListener { public static final String TAG = "ContactlistFragment"; private ContactAdapter adapter; private ListView listView; private boolean hidden; private Sidebar sidebar; private InputMethodManager inputMethodManager; ImageButton clearSearch; EditText query; Handler handler = new Handler(); private List<QXUser> list; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { return inflater.inflate(R.layout.fragment_contact_list, container, false); } @Override public void onActivityCreated(Bundle savedInstanceState) { super.onActivityCreated(savedInstanceState); // T??home???appcrash if (savedInstanceState != null && savedInstanceState.getBoolean("isConflict", false)) return; inputMethodManager = (InputMethodManager) getActivity().getSystemService(Context.INPUT_METHOD_SERVICE); listView = (ListView) getView().findViewById(R.id.list); sidebar = (Sidebar) getView().findViewById(R.id.sidebar); sidebar.setListView(listView); View huanxinView = getView().findViewById(R.id.huanxin_contact_list); View groupView = getView().findViewById(R.id.group_contact_list); huanxinView.setOnClickListener(this); groupView.setOnClickListener(this); // ? query = (EditText) getView().findViewById(R.id.query); query.setHint(R.string.search); 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(); hideSoftKeyboard(); } }); list = new ArrayList<QXUser>(); // adapter adapter = new ContactAdapter(getActivity(), R.layout.row_contact, loadConversationsWithRecentChat()); listView.setAdapter(adapter); listView.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> parent, View view, int position, long id) { startActivity(new Intent(getActivity(), PersonalInfoActivity.class).putExtra("userId", adapter.getItem(position).getHXid())); } }); 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; } }); registerForContextMenu(listView); } @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { super.onCreateContextMenu(menu, v, menuInfo); } @Override public boolean onContextItemSelected(MenuItem item) { 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(); } } // ui public void refresh() { try { // ?? getActivity().runOnUiThread(new Runnable() { public void run() { loadConversationsWithRecentChat(); adapter.notifyDataSetChanged(); } }); } catch (Exception e) { e.printStackTrace(); } } void hideSoftKeyboard() { if (getActivity().getWindow() .getAttributes().softInputMode != WindowManager.LayoutParams.SOFT_INPUT_STATE_HIDDEN) { if (getActivity().getCurrentFocus() != null) inputMethodManager.hideSoftInputFromWindow(getActivity().getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS); } } @Override public void onSaveInstanceState(Bundle outState) { super.onSaveInstanceState(outState); if (((MainActivity) getActivity()).isConflict) { outState.putBoolean("isConflict", true); } else if (((MainActivity) getActivity()).getCurrentAccountRemoved()) { outState.putBoolean(Constant.ACCOUNT_REMOVED, true); } } @Override public void onClick(View v) { switch (v.getId()) { case R.id.huanxin_contact_list: getActivity().startActivity(new Intent(getActivity(), ContactsActivity.class)); break; case R.id.group_contact_list: getActivity().startActivity(new Intent(getActivity(), GroupsActivity.class)); break; default: break; } } /** * ?? * * @param context * @return + */ private List<QXUser> loadConversationsWithRecentChat() { Hashtable<String, EMConversation> conversations = EMChatManager.getInstance().getAllConversations(); // messages size0conversation /** * ??lastMsgTime?? ??Collection.sort * ??ConversationSort????? ??? */ List<Pair<Long, String>> sortList = new ArrayList<Pair<Long, String>>(); synchronized (conversations) { for (EMConversation conversation : conversations.values()) { if (conversation.getAllMessages().size() != 0) { sortList.add(new Pair<Long, String>(conversation.getLastMessage().getMsgTime(), conversation.getUserName())); } } } try { // Internal is TimSort algorithm, has bug sortConversationByLastChatTime(sortList); } catch (Exception e) { e.printStackTrace(); } list.clear(); for (Pair<Long, String> sortItem : sortList) { for (QXUser user : DemoApplication.getInstance().getAllUsers()) { if (user.getHXid().equals(sortItem.second)) { list.add(user); } } } return list; } /** * ????? * * @param usernames */ private void sortConversationByLastChatTime(List<Pair<Long, String>> conversationList) { Collections.sort(conversationList, new Comparator<Pair<Long, String>>() { @Override public int compare(final Pair<Long, String> con1, final Pair<Long, String> con2) { if (con1.first == con2.first) { return 0; } else if (con2.first > con1.first) { return 1; } else { return -1; } } }); } }