【移动应用开发技术】Android中怎么实现一个微信聊天界面

【移动应用开发技术】Android中怎么实现一个微信聊天界面

今天就跟大家聊聊有关Android中怎么实现一个微信聊天界面，可能很多人都不太了解，为了让大家更加了解，在下给大家总结了以下内容，希望大家根据这篇文章可以有所收获。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