Android仿微信气泡聊天界面设计

微信的气泡聊天是仿iPhone自带短信而设计出来的，不过感觉还不错可以尝试一下仿着微信的气泡聊天做一个Demo，给大家分享一下！效果图如下：

气泡聊天最终要的是素材，要用到9.png文件的素材，这样气泡会随着聊天内容的多少而改变气泡的大小且不失真。为了方便，我就直接在微信里面提取出来啦。

聊天的内容是用ListView来显示的，将聊天的内容封装成一个ChatMsgEntity类的对象里面，然后交给自定义的ListView适配器将聊天内容显示出来。

ChatMsgEntity.java比较简单，只是聊天的内容存储、设置和获取。

package com.example.school;

public class ChatMsgEntity {
    private static final String TAG = ChatMsgEntity.class.getSimpleName();
    //名字
    private String name;
    //日期
    private String date;
    //聊天内容
    private String text;
    //是否为对方发来的信息
    private boolean isComMeg = true;

    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 getText() {
        return text;
    }

    public void setText(String text) {
        this.text = text;
    }

    public boolean getMsgType() {
        return isComMeg;
    }

    public void setMsgType(boolean isComMsg) {
    	isComMeg = isComMsg;
    }

    public ChatMsgEntity() {
    }

    public ChatMsgEntity(String name, String date, String text, boolean isComMsg) {
        this.name = name;
        this.date = date;
        this.text = text;
        this.isComMeg = isComMsg;
    }
}

显示ListView的适配器ChatMsgViewAdpater.java:

package com.example.school;

import android.R.integer;
import android.content.Context;
import android.database.DataSetObserver;

import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnLongClickListener;
import android.view.ViewGroup;

import android.widget.BaseAdapter;
import android.widget.CheckBox;
import android.widget.LinearLayout;
import android.widget.TextView;

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

public class ChatMsgViewAdapter extends BaseAdapter {

	//ListView视图的内容由IMsgViewType决定
	public static interface IMsgViewType
	{
		//对方发来的信息
		int IMVT_COM_MSG = 0;
		//自己发出的信息
		int IMVT_TO_MSG = 1;
	}

    private static final String TAG = ChatMsgViewAdapter.class.getSimpleName();
    private List<ChatMsgEntity> data;
    private Context context;
    private LayoutInflater mInflater;

    public ChatMsgViewAdapter(Context context, List<ChatMsgEntity> data) {
        this.context = context;
        this.data = data;
        mInflater = LayoutInflater.from(context);
    }

    //获取ListView的项个数
    public int getCount() {
        return data.size();
    }

    //获取项
    public Object getItem(int position) {
        return data.get(position);
    }

    //获取项的ID
    public long getItemId(int position) {
        return position;
    }

    //获取项的类型
	public int getItemViewType(int position) {
		// TODO Auto-generated method stub
	 	ChatMsgEntity entity = data.get(position);

	 	if (entity.getMsgType())
	 	{
	 		return IMsgViewType.IMVT_COM_MSG;
	 	}else{
	 		return IMsgViewType.IMVT_TO_MSG;
	 	}

	}

	//获取项的类型数
	public int getViewTypeCount() {
		// TODO Auto-generated method stub
		return 2;
	}

	//获取View
    public View getView(int position, View convertView, ViewGroup parent) {

    	ChatMsgEntity entity = data.get(position);
    	boolean isComMsg = entity.getMsgType();

    	ViewHolder viewHolder = null;
	    if (convertView == null)
	    {
	    	  if (isComMsg)
			  {
	    		  //如果是对方发来的消息，则显示的是左气泡
				  convertView = mInflater.inflate(R.layout.chatting_item_msg_text_left, null);
			  }else{
				  //如果是自己发出的消息，则显示的是右气泡
				  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.getText());

	    return convertView;
    }

    //通过ViewHolder显示项的内容
    static class ViewHolder {
        public TextView tvSendTime;
        public TextView tvUserName;
        public TextView tvContent;
        public boolean isComMsg = true;
    }

}

对方发来消息的显示布局chatting_item_msg_text_left.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"
	    android:orientation="vertical"
	    android:padding="6dp">
	    <LinearLayout
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content"
	        android:orientation="vertical"
	        android:gravity="center_horizontal">
	        <TextView
	            android:id="@+id/tv_sendtime"
	            android:layout_width="wrap_content"
	            android:layout_height="wrap_content"
	           	style="@style/chat_text_date_style"/>
	    </LinearLayout>
	    <RelativeLayout
	        android:layout_width="fill_parent"
	        android:layout_height="wrap_content"
	        android:layout_marginTop="5dp" >
	         	<ImageView
		           android:id="@+id/iv_userhead"
		           android:layout_width="wrap_content"
		           android:layout_height="wrap_content"
		           android:focusable="false"
		           android:layout_alignParentLeft="true"
                   android:layout_alignParentTop="true"
		           android:background="@drawable/mini_avatar_shadow"/>
 				<TextView
	            android:id="@+id/tv_chatcontent"
	            android:layout_toRightOf="@id/iv_userhead"
	            android:layout_marginLeft="10dp"
	            android:layout_width="wrap_content"
	            android:layout_height="wrap_content"
	            android:background="@drawable/chatfrom_bg"
	          	style="@style/chat_content_date_style"/>
	            <TextView
	            android:id="@+id/tv_username"
	            android:layout_width="wrap_content"
	            android:layout_height="wrap_content"
	            android:layout_below="@id/iv_userhead"
	            android:layout_alignParentLeft="true"
	            android:layout_toLeftOf="@id/tv_chatcontent"
	            style="@style/chat_text_name_style"/>
	    </RelativeLayout>
</LinearLayout>

chatting_item_msg_text_right.xml和上面差不多，只是气泡和头像的方向在右边，就不贴代码了。

主界面的布局chat.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:background="#f0f0e0" >
    <RelativeLayout
	    android:id="@+id/rl_layout"
	    android:layout_width="fill_parent"
	    android:layout_height="wrap_content"
	    android:background="@drawable/title" >
	    <Button
            android:id="@+id/btn_back"
            android:gravity="center_vertical"
            android:layout_marginLeft="5dp"
            android:paddingLeft="18dp"
            android:textSize="18.0sp"
            android:textColor="#ffffff"
            android:background="@drawable/selector_btn_back"
            android:layout_width="70dp"
            android:layout_height="wrap_content"
            android:text="@string/back" />
	    <TextView
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:text="@string/school_title_name"
	        android:layout_centerInParent="true"
	        style="@style/my_txt"/>
	    <ImageView
	        android:layout_width="wrap_content"
	        android:layout_height="wrap_content"
	        android:background="@drawable/campus_info"
	        android:layout_centerVertical="true"
	        android:layout_alignParentRight="true"
	        android:layout_marginRight="15dp"/>
	    </RelativeLayout>
    <RelativeLayout
        android:id="@+id/rl_bottom"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:background="@drawable/layout_bg1" >
        <Button
        	android:id="@+id/btn_send"
        	android:layout_width="60dp"
        	android:layout_height="40dp"
        	android:layout_alignParentRight="true"
        	android:layout_marginRight="10dp"
        	android:layout_centerVertical="true"
        	android:text="@string/send" />
        <EditText
	        android:id="@+id/et_sendmessage"
    	    android:layout_width="fill_parent"
        	android:layout_height="40dp"
        	android:layout_toLeftOf="@id/btn_send"
        	android:layout_marginLeft="10dp"
        	android:layout_marginRight="10dp"
        	android:background="@drawable/edittext1"
        	android:layout_centerVertical="true"
        	android:singleLine="true"
        	android:textSize="18sp"/>
    </RelativeLayout>
    <ListView
    	android:id="@+id/listview"
    	android:layout_below="@id/rl_layout"
    	android:layout_above="@id/rl_bottom"
    	android:layout_width="fill_parent"
    	android:layout_height="fill_parent"
    	android:layout_marginLeft="10.0dip"
		android:layout_marginTop="10.0dip"
		android:layout_marginRight="10.0dip"
    	android:divider="@null"
    	android:dividerHeight="5dp"
    	android:scrollbars="none"
    	android:cacheColorHint="#00000000"/>
</RelativeLayout>

ChatActivity.java

package com.example.chat;

import java.util.ArrayList;
import java.util.Calendar;
import java.util.List;

import com.example.school.R;

import android.os.Bundle;
import android.app.Activity;
import android.content.Intent;
import android.view.KeyEvent;
import android.view.Menu;
import android.view.View;
import android.view.Window;
import android.view.View.OnClickListener;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.TextView;

public class ChatActivity extends Activity implements OnClickListener {
	private Button mBtnSend;
	private Button mBtnBack;
	private EditText mEditTextContent;
	//聊天内容的适配器
	private ChatMsgViewAdapter mAdapter;
	private ListView mListView;
	//聊天的内容
	private List<ChatMsgEntity> mDataArrays = new ArrayList<ChatMsgEntity>();

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);// 去掉标题栏
		setContentView(R.layout.chat);
		initView();
		initData();
	}

	//初始化视图
	private void initView() {
		mListView = (ListView) findViewById(R.id.listview);
		mBtnBack = (Button) findViewById(R.id.btn_back);
		mBtnBack.setOnClickListener(this);
		mBtnSend = (Button) findViewById(R.id.btn_send);
		mBtnSend.setOnClickListener(this);
		mEditTextContent = (EditText) findViewById(R.id.et_sendmessage);
	}

	private String[] msgArray = new String[]{"  孩子们，要好好学习，天天向上！要好好听课，不要翘课！不要挂科，多拿奖学金！三等奖学金的争取拿二等，二等的争取拿一等，一等的争取拿励志！",
			"姚妈妈还有什么吩咐...",
			"还有，明天早上记得跑操啊，不来的就扣德育分！",
			"德育分是什么？扣了会怎么样？",
			"德育分会影响奖学金评比，严重的话，会影响毕业",
			"哇！学院那么不人道？",
			"你要是你不听话，我当场让你不能毕业！",
			"姚妈妈，我知错了(- -我错在哪了...)"};

	private String[]dataArray = new String[]{"2012-09-01 18:00", "2012-09-01 18:10",
			"2012-09-01 18:11", "2012-09-01 18:20",
			"2012-09-01 18:30", "2012-09-01 18:35",
			"2012-09-01 18:40", "2012-09-01 18:50"};
	private final static int COUNT = 8;

	//初始化要显示的数据
	private void initData() {
		for(int i = 0; i < COUNT; i++) {
			ChatMsgEntity entity = new ChatMsgEntity();
    		entity.setDate(dataArray[i]);
    		if (i % 2 == 0)
    		{
    			entity.setName("姚妈妈");
    			entity.setMsgType(true);
    		}else{
    			entity.setName("Shamoo");
    			entity.setMsgType(false);
    		}

    		entity.setText(msgArray[i]);
    		mDataArrays.add(entity);
		}
		mAdapter = new ChatMsgViewAdapter(this, mDataArrays);
		mListView.setAdapter(mAdapter);
	}

	public void onClick(View view) {
		// TODO Auto-generated method stub
		switch(view.getId()) {
		case R.id.btn_back:
			back();
			break;
		case R.id.btn_send:
			send();
			break;
		}
	}

	private void send()
	{
		String contString = mEditTextContent.getText().toString();
		if (contString.length() > 0)
		{
			ChatMsgEntity entity = new ChatMsgEntity();
			entity.setDate(getDate());
			entity.setName("");
			entity.setMsgType(false);
			entity.setText(contString);
			mDataArrays.add(entity);
			mAdapter.notifyDataSetChanged();
			mEditTextContent.setText("");
			mListView.setSelection(mListView.getCount() - 1);
		}
	}

	//获取日期
	private String getDate() {
        Calendar c = Calendar.getInstance();
        String year = String.valueOf(c.get(Calendar.YEAR));
        String month = String.valueOf(c.get(Calendar.MONTH));
        String day = String.valueOf(c.get(Calendar.DAY_OF_MONTH) + 1);
        String hour = String.valueOf(c.get(Calendar.HOUR_OF_DAY));
        String mins = String.valueOf(c.get(Calendar.MINUTE));
        StringBuffer sbBuffer = new StringBuffer();
        sbBuffer.append(year + "-" + month + "-" + day + " " + hour + ":" + mins);
        return sbBuffer.toString();
    }
	public boolean onKeyDown(int keyCode, KeyEvent event) {
		back();
		return true;
	}

	private void back() {
		finish();
	}
}

代码比较多，不过Demo的实现还是比较简单的，有需要的可以留邮箱。