Android 智能问答机器人的实现

转载请标明出处：http://blog.csdn.net/lmj623565791/article/details/38498353 ，本文出自：【张鸿洋的博客】

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版本号的机器人，没什么技术含量，可是挺好玩的~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。还支持自己主动学习噢 ~

以下開始代码了~

2、布局文件

主界面消息的显示是一个ListView，只是这个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和以下的消息框和消息button了~没撒好说的

3、HttpUtils

封装了一个用于訪问API的工具类，事实上就一个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("server连接错误！
");
			}

		} catch (Exception e)
		{
			e.printStackTrace();
			throw new CommonException("server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。非常easy~

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<ChatMessage> mDatas = new ArrayList<ChatMessage>();
	/**
	 * 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。非常高兴为您服务"));
	}

	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())
		{
			// 假设开启
			imm.toggleSoftInput(InputMethodManager.SHOW_IMPLICIT,
					InputMethodManager.HIDE_NOT_ALWAYS);
			// 关闭软键盘。开启方法同样，这种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, "server挂了呢...");
				}
				Message message = Message.obtain();
				message.obj = from;
				mHandler.sendMessage(message);
			};
		}.start();

	}

}

为ListView设置数据。一開始就设置了第一句话“我是小貅貅。非常高兴为您服务”。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<ChatMessage> mDatas;

	public ChatMessageAdapter(Context context, List<ChatMessage> 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;
	}

}

唯一须要注意的是，由于我们的ListView的Item有两种显示风格，所以比平时我们须要多重写两个方法：

/**
	 * 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依据当然Item的position决定返回不同的整型变量。然后在getView中，依据消息的类型去载入不同的Item布局就可以。

基本上也就完工了，没啥技术含量，纯属娱乐。各位程序员兄，没事能够花点时间写下玩一玩~劳逸结合下~

源代码点击下载