匿名通过本文主要向大家介绍了android 微信聊天等相关知识,希望对您有所帮助,也希望大家支持linkedu.com www.linkedu.com
微信聊天现在非常火，是因其界面漂亮吗，哈哈，也许吧。微信每条消息都带有一个气泡，非常迷人，看起来感觉实现起来非常难，其实并不难。下面小编给大家分享实现代码
先给大家展示下实现效果图：
OK，下面我们来看一下整个小项目的主体结构：
下面是Activity的代码：
package com.way.demo;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
/**
* @author way
*/
public class WeixinChatDemoActivity extends Activity 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
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
initView();// 初始化view
initData();// 初始化数据
mListView.setSelection(mAdapter.getCount() - 1);
}
/**
* 初始化view
*/
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);
}
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？", "有毛片吗？", "种子一大堆啊~还怕没片？", "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
/**
* 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());
}
}ListView的代码：
package com.way.demo;
import java.util.List;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
/**
* 消息ListView的Adapter
*
* @author way
*/
public class ChatMsgViewAdapter extends BaseAdapter {
public static interface IMsgViewType {
int IMVT_COM_MSG = 0;// 收到对方的消息
int IMVT_TO_MSG = 1;// 自己发送出去的消息
}
private static final int ITEMCOUNT = 2;// 消息类型的总数
private List<ChatMsgEntity> coll;// 消息对象数组
private LayoutInflater mInflater;
public ChatMsgViewAdapter(Context context, List<ChatMsgEntity> coll) {
this.coll = coll;
mInflater = LayoutInflater.from(context);
}
public int getCount() {
return coll.size();
}
public Object getItem(int position) {
return coll.get(position);
}
public long getItemId(int position) {
return position;
}
/**
* 得到Item的类型，是对方发过来的消息，还是自己发送出去的
*/
public int getItemViewType(int position) {
ChatMsgEntity entity = coll.get(position);
if (entity.getMsgType()) {//收到的消息
return IMsgViewType.IMVT_COM_MSG;
} else {//自己发送的消息
return IMsgViewType.IMVT_TO_MSG;
}
}
/**
* Item类型的总数
*/
public int getViewTypeCount() {
return ITEMCOUNT;
}
public View getView(int position, View convertView, ViewGroup parent) {
ChatMsgEntity entity = coll.get(position);
boolean isComMsg = entity.getMsgType();
ViewHolder viewHolder = null;
if (convertView == null) {
if (isComMsg) {
convertView = mInflater.inflate(
R.layout.chatting_item_msg_text_left, null);
} else {
convertView = mInflater.inflate(
R.layout.chatting_item_msg_text_right, null);
}
viewHolder = new ViewHolder();
viewHolder.tvSendTime = (TextView) convertView
.findViewById(R.id.tv_sendtime);
viewHolder.tvUserName = (TextView) convertView
.findViewById(R.id.tv_username);
viewHolder.tvContent = (TextView) convertView
.findViewById(R.id.tv_chatcontent);
viewHolder.isComMsg = isComMsg;
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
viewHolder.tvSendTime.setText(entity.getDate());
viewHolder.tvUserName.setText(entity.getName());
viewHolder.tvContent.setText(entity.getMessage());
return convertView;
}
static class ViewHolder {
public TextView tvSendTime;
public TextView tvUserName;
public TextView tvContent;
public boolean isComMsg = true;
}
}消息对象的代码：
package com.way.demo;
/**
* 一个消息的JavaBean
*
* @author way
*
*/
public class ChatMsgEntity {
private String name;//消息来自
private String date;//消息日期
private String message;//消息内容
private boolean isComMeg = true;// 是否为收到的消息
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getDate() {
return date;
}
public void setDate(String date) {
this.date = date;
}
public String getMessage() {
return message;
}
public void setMessage