昨天写了个界面，实现了Android泡泡聊天界面。运行结果如下，点击发送按钮，屏幕就显示Text的内容。

我也是在网上的一份源码的基础上更改的，整个泡泡界面的实现要点：

（1）主界面其实就是一个List View 

       （2）文字显示界面其实就使用了android:background="@drawable/incoming"这个东西。背景图片的格式是xxx.9.png，专门用来缩放的，不然显示效果非常差。

        （3）自定义了一个adapter,当然是继承android.widget.BaseAdapter，重写了getView的方法。

整个工程分布如下：

主activity: ChatActivity如下：

package com.tencent;import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;import java.util.ArrayList;
import java.util.Calendar;public class ChatActivity extends Activity {private static final String TAG = ChatActivity.class.getSimpleName();;private ListView talkView;private Button messageButton;private EditText messageText;// private ChatMsgViewAdapter myAdapter;private ArrayList<ChatMsgEntity> list = new ArrayList<ChatMsgEntity>();public void onCreate(Bundle savedInstanceState) {Log.v(TAG, "onCreate >>>>>>");super.onCreate(savedInstanceState);setContentView(R.layout.main);talkView = (ListView) findViewById(R.id.list);messageButton = (Button) findViewById(R.id.MessageButton);messageText = (EditText) findViewById(R.id.MessageText);OnClickListener messageButtonListener = new OnClickListener() {@Overridepublic void onClick(View arg0) {// TODO Auto-generated method stubLog.v(TAG, "onclick >>>>>>>>");String name = getName();String date = getDate();String msgText = getText();int RId = R.layout.list_say_he_item;ChatMsgEntity newMessage = new ChatMsgEntity(name, date, msgText, RId);list.add(newMessage);// list.add(d0);talkView.setAdapter(new ChatMsgViewAdapter(ChatActivity.this, list));messageText.setText("");// myAdapter.notifyDataSetChanged();}};messageButton.setOnClickListener(messageButtonListener);}// shuold be redefine in the futureprivate String getName() {return getResources().getString(R.string.myDisplayName);}// shuold be redefine in the futureprivate String getDate() {Calendar c = Calendar.getInstance();String date = String.valueOf(c.get(Calendar.YEAR)) + "-"+ String.valueOf(c.get(Calendar.MONTH)) + "-" + c.get(c.get(Calendar.DAY_OF_MONTH));return date;}// shuold be redefine in the futureprivate String getText() {return messageText.getText().toString();}public void onDestroy() {Log.v(TAG, "onDestroy>>>>>>");// list = null;super.onDestroy();}
}

显示消息体的定义

package com.tencent;public class ChatMsgEntity {private static final String TAG = ChatMsgEntity.class.getSimpleName();private String name;private String date;private String text;private int layoutID;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 int getLayoutID() {return layoutID;}public void setLayoutID(int layoutID) {this.layoutID = layoutID;}public ChatMsgEntity() {}public ChatMsgEntity(String name, String date, String text, int layoutID) {super();this.name = name;this.date = date;this.text = text;this.layoutID = layoutID;}}

ChatMsgViewAdapter定义如下：

package com.tencent;import android.content.Context;
import android.database.DataSetObserver;import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;import android.widget.BaseAdapter;
import android.widget.LinearLayout;
import android.widget.TextView;import java.util.ArrayList;public class ChatMsgViewAdapter extends BaseAdapter {private static final String TAG = ChatMsgViewAdapter.class.getSimpleName();private ArrayList<ChatMsgEntity> coll;private Context ctx;public ChatMsgViewAdapter(Context context, ArrayList<ChatMsgEntity> coll) {ctx = context;this.coll = coll;}public boolean areAllItemsEnabled() {return false;}public boolean isEnabled(int arg0) {return false;}public int getCount() {return coll.size();}public Object getItem(int position) {return coll.get(position);}public long getItemId(int position) {return position;}public int getItemViewType(int position) {return position;}public View getView(int position, View convertView, ViewGroup parent) {Log.v(TAG, "getView>>>>>>>");ChatMsgEntity entity = coll.get(position);int itemLayout = entity.getLayoutID();LinearLayout layout = new LinearLayout(ctx);LayoutInflater vi = (LayoutInflater) ctx.getSystemService(Context.LAYOUT_INFLATER_SERVICE);vi.inflate(itemLayout, layout, true);TextView tvName = (TextView) layout.findViewById(R.id.messagedetail_row_name);tvName.setText(entity.getName());TextView tvDate = (TextView) layout.findViewById(R.id.messagedetail_row_date);tvDate.setText(entity.getDate());TextView tvText = (TextView) layout.findViewById(R.id.messagedetail_row_text);tvText.setText(entity.getText());return layout;}public int getViewTypeCount() {return coll.size();}public boolean hasStableIds() {return false;}public boolean isEmpty() {return false;}public void registerDataSetObserver(DataSetObserver observer) {}public void unregisterDataSetObserver(DataSetObserver observer) {}
}

布局文件看得我比较痛苦，这个布局文件不好搞啊，呵呵

整个工程资源文件，我已经上传到资源共享里面了。

请大家这里下载：

http://download.csdn.net/user/randyjiawenjie