ChatActivity.java

package com.way.chat.activity;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

import com.way.Constants;
import com.way.chat.common.bean.ChatMsgEntity;
import com.way.chat.common.bean.TextMessage;
import com.way.chat.common.bean.User;
import com.way.chat.common.tran.bean.TranObject;
import com.way.chat.common.tran.bean.TranObjectType;
import com.way.client.ClientOutputThread;
import com.way.util.MessageDB;
import com.way.util.MyDate;
import com.way.util.SharePreferenceUtil;

import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;

/**
 * 聊天Activity
 * 
 * @author way
 */
public class ChatActivity extends SuperView implements OnClickListener {
	private Button mBtnSend;// 发送btn
	private Button mBtnBack;// 返回btn
	private EditText mEditTextContent;
	private TextView mFriendName;
	private ListView mListView;
	private ChatMsgViewAdapter mAdapter;// 消息视图的Adapter
	private List<ChatMsgEntity> mDataArrays = new ArrayList<ChatMsgEntity>();// 消息对象数组
	private SharePreferenceUtil util;
	private User user;
	private MessageDB messageDB;

	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉标题栏
		setContentView(R.layout.chat);
		messageDB = new MessageDB(this);
		user = (User) getIntent().getSerializableExtra("user");
		util = new SharePreferenceUtil(this, Constants.SAVE_USER);
		initView();// 初始化view
		initData();// 初始化数据
	}

	/**
	 * 初始化view
	 */
	public void initView() {
		mListView = (ListView) findViewById(R.id.listview);
		mBtnSend = (Button) findViewById(R.id.chat_send);
		mBtnSend.setOnClickListener(this);
		mBtnBack = (Button) findViewById(R.id.chat_back);
		mBtnBack.setOnClickListener(this);
		mFriendName = (TextView) findViewById(R.id.chat_name);
		mFriendName.setText(util.getName());
		mEditTextContent = (EditText) findViewById(R.id.chat_editmessage);
	}

	/**
	 * 加载消息历史，从数据库中读出
	 */
	public void initData() {
		List<ChatMsgEntity> list = messageDB.getMsg(user.getId());
		if (list.size() > 0) {
			for (ChatMsgEntity entity : list) {
				if (entity.getName().equals("")) {
					entity.setName(user.getName());
				}
				if (entity.getImg() < 0) {
					entity.setImg(user.getImg());
				}
				mDataArrays.add(entity);
			}
			Collections.reverse(mDataArrays);
		}
		mAdapter = new ChatMsgViewAdapter(this, mDataArrays);
		mListView.setAdapter(mAdapter);
		mListView.setSelection(mAdapter.getCount() - 1);
	}

	@Override
	protected void onDestroy() {
		super.onDestroy();
		messageDB.close();
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.chat_send:// 发送按钮点击事件
			send();
			break;
		case R.id.chat_back:// 返回按钮点击事件
			finish();// 结束,实际开发中，可以返回主界面
			break;
		}
	}

	/**
	 * 发送消息
	 */
	private void send() {
		String contString = mEditTextContent.getText().toString();
		if (contString.length() > 0) {
			ChatMsgEntity entity = new ChatMsgEntity();
			entity.setName(util.getName());
			entity.setDate(MyDate.getDateEN());
			entity.setMessage(contString);
			entity.setImg(util.getImg());// 自己的头像图片暂未处理
			entity.setMsgType(false);

			messageDB.saveMsg(user.getId(), entity);

			mDataArrays.add(entity);
			mAdapter.notifyDataSetChanged();// 通知ListView，数据已发生改变
			mEditTextContent.setText("");// 清空编辑框数据
			mListView.setSelection(mListView.getCount() - 1);// 发送一条消息时，ListView显示选择最后一项
			ClientOutputThread out = GetMsgService.client
					.getClientOutputThread();
			if (out != null) {
				TranObject<TextMessage> o = new TranObject<TextMessage>(
						TranObjectType.MESSAGE);
				TextMessage message = new TextMessage();
				message.setMessage(contString);
				o.setObject(message);
				o.setFromUser(Integer.parseInt(util.getId()));
				o.setToUser(user.getId());
				out.setMsg(o);
			}
		}
	}

	@Override
	public void getMessage(TranObject msg) {
		// TODO Auto-generated method stub
		switch (msg.getType()) {
		case MESSAGE:
			TextMessage tm = (TextMessage) msg.getObject();
			String message = tm.getMessage();
			ChatMsgEntity entity = new ChatMsgEntity(user.getName(),
					MyDate.getDateEN(), message, user.getImg(), true);// 收到的消息
			if (msg.getFromUser() == user.getId() || msg.getFromUser() == 0) {// 如果是正在聊天的好友的消息，或者是服务器的消息

				messageDB.saveMsg(user.getId(), entity);

				mDataArrays.add(entity);
				mAdapter.notifyDataSetChanged();
				mListView.setSelection(mListView.getCount() - 1);
			} else {
				messageDB.saveMsg(msg.getFromUser(), entity);// 保存到数据库
				Toast.makeText(ChatActivity.this,
						"您有新的消息来自：" + msg.getFromUser() + ":" + message, 0)
						.show();// 其他好友的消息，就先提示，并保存到数据库
			}
			break;
		case LOGIN:
			User loginUser = (User) msg.getObject();
			Toast.makeText(ChatActivity.this, loginUser.getId() + "上线了", 0)
					.show();
			break;
		case LOGOUT:
			User logoutUser = (User) msg.getObject();
			Toast.makeText(ChatActivity.this, logoutUser.getId() + "下线了", 0)
					.show();
			break;
		default:
			break;
		}
	}
}