1 package com.example.androidliaotian; 2  3 public class JavaBean { 4     private String neirong; 5     private String time; 6     public String getNeirong() { 7         return neirong; 8     } 9     public void setNeirong(String neirong) {10         this.neirong = neirong;11     }12     public String getTime() {13         return time;14     }15     public void setTime(String time) {16         this.time = time;17     }18     @Override19     public String toString() {20         return "JavaBean [neirong=" + neirong + ", time=" + time + "]";21     }22     23     24 }

 1 package com.example.androidliaotian; 2  3 import java.util.ArrayList; 4 import java.util.List; 5  6  7  8 import android.app.Activity; 9 import android.os.Bundle;10 import android.util.Log;11 import android.view.Menu;12 import android.view.MenuItem;13 import android.view.View;14 import android.view.View.OnClickListener;15 import android.widget.Button;16 import android.widget.EditText;17 import android.widget.ListView;18 19 public class MainActivity extends Activity {20     private ListView listview;//列表21     private EditText neirong;//内容22     private Button fasong;//按钮23     private List<JavaBean> list = new ArrayList<JavaBean>();//填充数据的list集合24     private MainAdapten adapten; //构建数据源25     @Override26     protected void onCreate(Bundle savedInstanceState) {27         setContentView(R.layout.activity_main);28         super.onCreate(savedInstanceState);29         30         listview = (ListView) findViewById(R.id.wo);31         //构建adapten数据源32         adapten = new MainAdapten(list, this);33         listview.setAdapter(adapten);34         neirong = (EditText) findViewById(R.id.neirong);35         fasong = (Button) findViewById(R.id.fasong);36     37         fasong.setOnClickListener(new OnClickListener() {38             39             @Override40             public void onClick(View v) {41                 //String text = ;42                 //实例化Bean文件43                 JavaBean javaBean = new JavaBean();44                 //取当前文本内容并利用set方法赋值45                 javaBean.setNeirong(neirong.getText().toString());46                 javaBean.setTime(System.currentTimeMillis()+"");47                 list.add(javaBean);48                 //更新数据源49                 adapten.setList(list);50                 adapten.notifyDataSetChanged();51                 //列表显示最后一条数据52                 listview.setSelection(list.size()-1);53                 //发送完毕之后要让输入框清空54                  neirong.setText("");55             }56         });57         58         59         60     }61     62 }

 1 package com.example.androidliaotian; 2  3 import java.util.List; 4  5  6  7 import android.content.Context; 8 import android.view.LayoutInflater; 9 import android.view.View;10 import android.view.ViewGroup;11 import android.widget.BaseAdapter;12 import android.widget.ImageView;13 import android.widget.TextView;14 15 public class MainAdapten extends BaseAdapter{16     private List<JavaBean> list;17     private Context context;18     19     public MainAdapten(List<JavaBean> list,Context context){20         this.context = context;21         this.list = list;22     }23     24     public void setList(List<JavaBean> list) {25         this.list = list;26         notifyDataSetChanged();27     }28 29     @Override30     public int getCount() {31         return list.size();32     }33 34     @Override35     public Object getItem(int position) {36         return list.get(position);37     }38 39     @Override40     public long getItemId(int position) {41         return position;42     }43 44     @Override45     public View getView(int position, View convertView, ViewGroup parent) {46         47         final Hui hui;48         if(convertView == null){49             hui = new Hui();50             convertView = LayoutInflater.from(context).inflate(R.layout.item_chatqipao, null);51             hui.chatneirong = (TextView) convertView.findViewById(R.id.tv_chatneirong);52             hui.chattime = (TextView) convertView.findViewById(R.id.tv_chattime);53             hui.tou = (ImageView) convertView.findViewById(R.id.iv_chattou);54         55             convertView.setTag(hui);56         }else{57             hui = (Hui) convertView.getTag();58         }59         JavaBean javaBean  = list.get(position);60         hui.chatneirong.setText("我是"+javaBean.getNeirong());61         hui.chattime.setText(javaBean.getTime());62         //javaBean.setTime(javaBean.getTime());63         64         return convertView;65     }66 67     class Hui{68         ImageView tou,tupian;69         TextView chattime,chatneirong;70     }71 }

 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 2     xmlns:tools="http://schemas.android.com/tools" 3     android:layout_width="match_parent" 4     android:layout_height="match_parent" 5     tools:context="${relativePackage}.${activityClass}" > 6     <!-- 用来显示消息的列表 --> 7     <ListView android:id="@+id/wo" android:layout_width="match_parent" 8         android:layout_height="wrap_content" 9         android:layout_above="@+id/neirong"></ListView>10     <!-- 用来输入文本的 -->11     <EditText android:id="@+id/neirong" android:layout_width="match_parent"12         android:layout_height="wrap_content" android:layout_alignParentBottom="true"13         android:layout_toLeftOf="@+id/fasong" android:text="少时诵诗书" />14     <!-- 用于发送的按钮 -->15     <Button android:id="@+id/fasong" android:layout_width="wrap_content"16         android:layout_height="wrap_content"  android:text="发送"17         android:layout_alignParentBottom="true"  18         android:layout_alignParentRight="true"/>19 20 </RelativeLayout>

 1 <?xml version="1.0" encoding="utf-8"?> 2 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 3     android:layout_width="match_parent" 4     android:layout_height="match_parent" 5     android:orientation="vertical" > 6      7     <!-- 发送时间 --> 8     <TextView android:id="@+id/tv_chattime" android:layout_width="wrap_content" 9         android:layout_height="wrap_content" android:layout_alignParentTop="true"10         android:layout_centerHorizontal="true" android:layout_marginTop="14dp"11         android:padding="3dp"12         android:text="2016年9月13日10:55:58" android:textColor="#FFFFFF"13         android:textSize="12sp" />14     15     <!-- 文字内容 -->16     <TextView android:id="@+id/tv_chatneirong" android:layout_width="wrap_content"17         android:layout_height="wrap_content" android:layout_alignTop="@+id/iv_chattou"18         android:layout_toLeftOf="@+id/iv_chattou" android:background="@drawable/skin_aio_user_bubble_nor"19         android:gravity="center" android:padding="10dp"20         android:text="qw速度速度多少e" android:layout_marginTop="10dp"21          android:textSize="16sp"  android:maxLines="10"22          android:maxEms="10"23          />24 25     <!-- 头像 -->26     <ImageView android:id="@+id/iv_chattou" android:layout_width="40dp"27         android:layout_height="40dp" android:layout_alignParentRight="true"28         android:layout_below="@+id/tv_chattime" android:layout_marginRight="14dp"29         android:src="@drawable/ic_launcher" />30 31  32 33 </RelativeLayout>