WeixinChatDemoActivity.java

package com.duguang.baseanimation.ui.imitate.weixin;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;

import com.duguang.baseanimation.R;
import com.duguang.baseanimation.ui.base.BaseActivity;

/**
 * 仿微信主页面
 * 
 */
public class WeixinChatDemoActivity extends BaseActivity implements OnClickListener {

	private Button mBtnSend;// 发送btn
	private Button mBtnBack;// 返回btn
	private EditText mEditTextContent;
	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 String[] msgArray = new String[] { "有大吗", "有！你呢？", "我也有", "那上吧",
			"打啊！你放大啊！", "你TM咋不放大呢？留大抢人头啊？CAO！你个菜B", "2B不解释", "尼滚...",
			"今晚去网吧包夜吧？", "有**吗？", "你说呢？", "OK,搞起！！" };

	private String[] dataArray = new String[] { "2012-09-22 18:00:02",
			"2012-09-22 18:10:22", "2012-09-22 18:11:24",
			"2012-09-22 18:20:23", "2012-09-22 18:30:31",
			"2012-09-22 18:35:37", "2012-09-22 18:40:13",
			"2012-09-22 18:50:26", "2012-09-22 18:52:57",
			"2012-09-22 18:55:11", "2012-09-22 18:56:45",
			"2012-09-22 18:57:33", };
	private final static int COUNT = 12;// 初始化数组总数

	
	@Override
	public void setView() {
		setContentView(R.layout.activity_imitate_weixin_main);
		
	}
	
	@Override
	public void initView() {
		mListView = (ListView) findViewById(R.id.listview);
		mBtnSend = (Button) findViewById(R.id.btn_send);
		mBtnSend.setOnClickListener(this);
		mBtnBack = (Button) findViewById(R.id.btn_back);
		mBtnBack.setOnClickListener(this);
		mEditTextContent = (EditText) findViewById(R.id.et_sendmessage);
		initData();// 初始化数据
		mListView.setSelection(mAdapter.getCount() - 1);
	}

	@Override
	public void setListener() {
		// TODO Auto-generated method stub
		
	}
	
	/**
	 * 模拟加载消息历史，实际开发可以从数据库中读出
	 */
	public void initData() {
		for (int i = 0; i < COUNT; i++) {
			ChatMsgEntity entity = new ChatMsgEntity();
			entity.setDate(dataArray[i]);
			if (i % 2 == 0) {
				entity.setName("肖B");
				entity.setMsgType(true);// 收到的消息
			} else {
				entity.setName("必败");
				entity.setMsgType(false);// 自己发送的消息
			}
			entity.setMessage(msgArray[i]);
			mDataArrays.add(entity);
		}

		mAdapter = new ChatMsgViewAdapter(this, mDataArrays);
		mListView.setAdapter(mAdapter);
	}

	@Override
	public void onClick(View v) {
		switch (v.getId()) {
		case R.id.btn_send:// 发送按钮点击事件
			send();
			break;
		case R.id.btn_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("必败");
			entity.setDate(getDate());
			entity.setMessage(contString);
			entity.setMsgType(false);

			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
		}
	}

	/**
	 * 发送消息时，获取当前事件
	 * 
	 * @return 当前时间
	 */
	private String getDate() {
		SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
		return format.format(new Date());
	}

	
}