Android 智能问答机器人的实现

原文转自：http://blog.csdn.net/lmj623565791/article/details/38498353

今天看到一个ios写的图灵机器人，直接去官网（http://www.tuling123.com/openapi/）看了下API接入，太简单了，就一个get请求~于是乎，写了一个Android版本的机器人，没什么技术含量，但是挺好玩的~刚好昨晚看了自己喜欢的秦时明月，嘿嘿，小貔貅，就是我的机器人宠物啦~

1、效果图

先看看效果图：

当然不仅是闲聊，还有更强大的，见下图：

好了，效果图就先这样了，有兴趣的自己去研究下，还支持自动学习噢 ~

下面开始代码了~

2、布局文件

主界面消息的显示是一个ListView，不过这个listView中的Item有两种风格，一个是左边的绿色消息，一个是右边的白色消息

左边的消息布局文件：

 xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:orientation="vertical" >

     <TextView
         android:id="@+id/chat_from_createDate"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:text="2012-09-01 18:30:20"
         style="@style/chat_date_style"
        />

     <LinearLayout
         android:layout_width="fill_parent"
         android:layout_height="wrap_content"
         android:orientation="horizontal" >

         <LinearLayout
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:layout_marginLeft="10dp"
             android:orientation="vertical" >

             <ImageView
                 android:id="@+id/chat_from_icon"
                 android:layout_width="49dp"
                 android:layout_height="49dp"
                 android:src="@drawable/icon" />

             <TextView
                 android:id="@+id/chat_from_name"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
                 android:layout_gravity="center"
                 android:text="小貅貅"
                 android:textSize="18sp" />
         LinearLayout>

         <TextView
             android:id="@+id/chat_from_content"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:minHeight="50dp"
             android:background="@drawable/chat_from_msg"
             android:text="有大吗。。。"
             android:textSize="18sp"
             android:textColor="#000"
             android:gravity="center_vertical"
             android:focusable="true"
             android:clickable="true"
             android:lineSpacingExtra="2dp"
             />
     LinearLayout>

 LinearLayout>

右边的和左边基本一致，就不贴了，最后会给出代码。

主布局文件：

 xml version="1.0" encoding="utf-8"?>
 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:background="@drawable/chat_bg_default"
     android:orientation="vertical" >

     <RelativeLayout
         android:id="@+id/ly_chat_title"
         android:layout_width="fill_parent"
         android:layout_height="45dp"
         android:background="@drawable/title_bar" >

         <TextView
             android:layout_width="fill_parent"
             android:layout_height="fill_parent"
             android:gravity="center"
             android:text="小貔貅"
             android:textColor="#fff"
             android:textSize="20sp"
             android:textStyle="bold" />
     RelativeLayout>

     <RelativeLayout
         android:id="@+id/ly_chat_bottom"
         android:layout_width="fill_parent"
         android:layout_height="55dp"
         android:layout_alignParentBottom="true"
         android:background="@drawable/bottom_bar" >

         <Button
             android:id="@+id/id_chat_send"
             android:layout_width="60dp"
             android:layout_height="40dp"
             android:layout_alignParentRight="true"
             android:layout_centerVertical="true"
             android:layout_marginRight="10dp"
             android:background="@drawable/chat_send_btn"
             android:onClick="sendMessage"
             android:text="发送" />

         <EditText
             android:id="@+id/id_chat_msg"
             android:layout_width="fill_parent"
             android:layout_height="40dp"
             android:layout_centerVertical="true"
             android:layout_marginLeft="10dp"
             android:layout_marginRight="10dp"
             android:layout_toLeftOf="@id/id_chat_send"
             android:background="@drawable/login_edit_normal"
             android:singleLine="true"
             android:textSize="18sp" />
     RelativeLayout>

     <ListView
         android:id="@+id/id_chat_listView"
         android:layout_width="fill_parent"
         android:layout_height="fill_parent"
         android:layout_above="@id/ly_chat_bottom"
         android:layout_below="@id/ly_chat_title"
         android:cacheColorHint="#0000"
         android:divider="@null"
         android:dividerHeight="5dp"
         android:scrollbarStyle="outsideOverlay" >
     ListView>

 RelativeLayout>

就是ListView和下面的消息框和消息按钮了~没撒好说的

3、HttpUtils

封装了一个用于访问API的工具类，其实就一个Get请求：

 package com.zhy.utils;

 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
 import java.net.HttpURLConnection;
 import java.net.URL;
 import java.net.URLEncoder;
 import java.util.Date;

 import com.example.android_robot_01.bean.ChatMessage;
 import com.example.android_robot_01.bean.ChatMessage.Type;
 import com.example.android_robot_01.bean.CommonException;
 import com.example.android_robot_01.bean.Result;
 import com.google.gson.Gson;

 public class HttpUtils
 {
     private static String API_KEY = "534dc342ad15885dffc10d7b5f813451";
     private static String URL = "http://www.tuling123.com/openapi/api";

     /**
      * 发送一个消息，并得到返回的消息
      * @param msg
      * @return
      */
     public static ChatMessage sendMsg(String msg)
     {
         ChatMessage message = new ChatMessage();
         String url = setParams(msg);
         String res = doGet(url);
         Gson gson = new Gson();
         Result result = gson.fromJson(res, Result.class);

         if (result.getCode() > 400000 || result.getText() == null
                 || result.getText().trim().equals(""))
         {
             message.setMsg("该功能等待开发...");
         }else
         {
             message.setMsg(result.getText());
         }
         message.setType(Type.INPUT);
         message.setDate(new Date());

         return message;
     }

     /**
      * 拼接Url
      * @param msg
      * @return
      */
     private static String setParams(String msg)
     {
         try
         {
             msg = URLEncoder.encode(msg, "UTF-8");
         } catch (UnsupportedEncodingException e)
         {
             e.printStackTrace();
         }
         return URL + "?key=" + API_KEY + "&info=" + msg;
     }

     /**
      * Get请求，获得返回数据
      * @param urlStr
      * @return
      */
     private static String doGet(String urlStr)
     {
         URL url = null;
         HttpURLConnection conn = null;
         InputStream is = null;
         ByteArrayOutputStream baos = null;
         try
         {
             url = new URL(urlStr);
             conn = (HttpURLConnection) url.openConnection();
             conn.setReadTimeout(5 * 1000);
             conn.setConnectTimeout(5 * 1000);
             conn.setRequestMethod("GET");
             if (conn.getResponseCode() == 200)
             {
                 is = conn.getInputStream();
                 baos = new ByteArrayOutputStream();
                 int len = -1;
                 byte[] buf = new byte[128];

                 while ((len = is.read(buf)) != -1)
                 {
                     baos.write(buf, 0, len);
                 }
                 baos.flush();
                 return baos.toString();
             } else
             {
                 throw new CommonException("服务器连接错误！");
             }

         } catch (Exception e)
         {
             e.printStackTrace();
             throw new CommonException("服务器连接错误！");
         } finally
         {
             try
             {
                 if (is != null)
                     is.close();
             } catch (IOException e)
             {
                 e.printStackTrace();
             }

             try
             {
                 if (baos != null)
                     baos.close();
             } catch (IOException e)
             {
                 e.printStackTrace();
             }
             conn.disconnect();
         }

     }

 }

暴露出去的，就是sendMsg这个静态方法，当然将返回的数据也直接封装成了ChatMessage

4、ChatMessage

 package com.example.android_robot_01.bean;

 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
 import java.util.Date;

 public class ChatMessage
 {

     /**
      * 消息类型
      */
     private Type type ;
     /**
      * 消息内容
      */
     private String msg;
     /**
      * 日期
      */
     private Date date;
     /**
      * 日期的字符串格式
      */
     private String dateStr;
     /**
      * 发送人
      */
     private String name;

     public enum Type
     {
         INPUT, OUTPUT
     }

     public ChatMessage()
     {
     }

     public ChatMessage(Type type, String msg)
     {
         super();
         this.type = type;
         this.msg = msg;
         setDate(new Date());
     }

     public String getDateStr()
     {
         return dateStr;
     }

     public Date getDate()
     {
         return date;
     }

     public void setDate(Date date)
     {
         this.date = date;
         DateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
         this.dateStr = df.format(date);

     }

     public String getName()
     {
         return name;
     }

     public void setName(String name)
     {
         this.name = name;
     }

     public Type getType()
     {
         return type;
     }

     public void setType(Type type)
     {
         this.type = type;
     }

     public String getMsg()
     {
         return msg;
     }

     public void setMsg(String msg)
     {
         this.msg = msg;
     }

 }

都没撒好说的，很简单~

5、主Activity

 package com.example.android_robot_01;

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

 import android.app.Activity;
 import android.content.Context;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.text.TextUtils;
 import android.view.View;
 import android.view.Window;
 import android.view.inputmethod.InputMethodManager;
 import android.widget.EditText;
 import android.widget.ListView;
 import android.widget.Toast;

 import com.example.android_robot_01.bean.ChatMessage;
 import com.example.android_robot_01.bean.ChatMessage.Type;
 import com.zhy.utils.HttpUtils;

 public class MainActivity extends Activity
 {
     /**
      * 展示消息的listview
      */
     private ListView mChatView;
     /**
      * 文本域
      */
     private EditText mMsg;
     /**
      * 存储聊天消息
      */
     private List mDatas = new ArrayList();
     /**
      * 适配器
      */
     private ChatMessageAdapter mAdapter;

     private Handler mHandler = new Handler()
     {
         public void handleMessage(android.os.Message msg)
         {
             ChatMessage from = (ChatMessage) msg.obj;
             mDatas.add(from);
             mAdapter.notifyDataSetChanged();
             mChatView.setSelection(mDatas.size() - 1);
         };
     };

     @Override
     protected void onCreate(Bundle savedInstanceState)
     {
         super.onCreate(savedInstanceState);
         requestWindowFeature(Window.FEATURE_NO_TITLE);
         setContentView(R.layout.main_chatting);

         initView();

         mAdapter = new ChatMessageAdapter(this, mDatas);
         mChatView.setAdapter(mAdapter);

     }

     private void initView()
     {
         mChatView = (ListView) findViewById(R.id.id_chat_listView);
         mMsg = (EditText) findViewById(R.id.id_chat_msg);
         mDatas.add(new ChatMessage(Type.INPUT, "我是小貅貅，很高兴为您服务"));
     }

     public void sendMessage(View view)
     {
         final String msg = mMsg.getText().toString();
         if (TextUtils.isEmpty(msg))
         {
             Toast.makeText(this, "您还没有填写信息呢...", Toast.LENGTH_SHORT).show();
             return;
         }

         ChatMessage to = new ChatMessage(Type.OUTPUT, msg);
         to.setDate(new Date());
         mDatas.add(to);

         mAdapter.notifyDataSetChanged();
         mChatView.setSelection(mDatas.size() - 1);

         mMsg.setText("");

         // 关闭软键盘
         InputMethodManager imm = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
         // 得到InputMethodManager的实例
         if (imm.isActive())
         {
             // 如果开启
             imm.toggleSoftInput(InputMethodManager.SHOW_IMPLICIT,
                     InputMethodManager.HIDE_NOT_ALWAYS);
             // 关闭软键盘，开启方法相同，这个方法是切换开启与关闭状态的
         }

         new Thread()
         {
             public void run()
             {
                 ChatMessage from = null;
                 try
                 {
                     from = HttpUtils.sendMsg(msg);
                 } catch (Exception e)
                 {
                     from = new ChatMessage(Type.INPUT, "服务器挂了呢...");
                 }
                 Message message = Message.obtain();
                 message.obj = from;
                 mHandler.sendMessage(message);
             };
         }.start();

     }

 }

为ListView设置数据，一开始就设置了第一句话“我是小貅貅，很高兴为您服务”；还有就是sendButton的事件处理。

6、适配器

 package com.example.android_robot_01;

 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;

 import com.example.android_robot_01.bean.ChatMessage;
 import com.example.android_robot_01.bean.ChatMessage.Type;

 public class ChatMessageAdapter extends BaseAdapter
 {
     private LayoutInflater mInflater;
     private List mDatas;

     public ChatMessageAdapter(Context context, List datas)
     {
         mInflater = LayoutInflater.from(context);
         mDatas = datas;
     }

     @Override
     public int getCount()
     {
         return mDatas.size();
     }

     @Override
     public Object getItem(int position)
     {
         return mDatas.get(position);
     }

     @Override
     public long getItemId(int position)
     {
         return position;
     }

     /**
      * 接受到消息为1，发送消息为0
      */
     @Override
     public int getItemViewType(int position)
     {
         ChatMessage msg = mDatas.get(position);
         return msg.getType() == Type.INPUT ? 1 : 0;
     }

     @Override
     public int getViewTypeCount()
     {
         return 2;
     }

     @Override
     public View getView(int position, View convertView, ViewGroup parent)
     {
         ChatMessage chatMessage = mDatas.get(position);

         ViewHolder viewHolder = null;

         if (convertView == null)
         {
             viewHolder = new ViewHolder();
             if (chatMessage.getType() == Type.INPUT)
             {
                 convertView = mInflater.inflate(R.layout.main_chat_from_msg,
                         parent, false);
                 viewHolder.createDate = (TextView) convertView
                         .findViewById(R.id.chat_from_createDate);
                 viewHolder.content = (TextView) convertView
                         .findViewById(R.id.chat_from_content);
                 convertView.setTag(viewHolder);
             } else
             {
                 convertView = mInflater.inflate(R.layout.main_chat_send_msg,
                         null);

                 viewHolder.createDate = (TextView) convertView
                         .findViewById(R.id.chat_send_createDate);
                 viewHolder.content = (TextView) convertView
                         .findViewById(R.id.chat_send_content);
                 convertView.setTag(viewHolder);
             }

         } else
         {
             viewHolder = (ViewHolder) convertView.getTag();
         }

         viewHolder.content.setText(chatMessage.getMsg());
         viewHolder.createDate.setText(chatMessage.getDateStr());

         return convertView;
     }

     private class ViewHolder
     {
         public TextView createDate;
         public TextView name;
         public TextView content;
     }

 }

唯一需要注意的是，因为我们的ListView的Item有两种显示风格，所以比平时我们需要多重写两个方法：

 /**
      * 接受到消息为1，发送消息为0
      */
     @Override
     public int getItemViewType(int position)
     {
         ChatMessage msg = mDatas.get(position);
         return msg.getType() == Type.INPUT ? 1 : 0;
     }

     @Override
     public int getViewTypeCount()
     {
         return 2;
     }

getViewTypeCount返回的就是种类数目了；getItemViewType根据当然Item的position决定返回不同的整型变量。然后在getView中，根据消息的类型去加载不同的Item布局即可。

基本上也就完工了，没啥技术含量，纯属娱乐，各位程序猿兄，没事可以花点时间写下玩一玩~劳逸结合下~

源码点击下载