Android图灵机器人的实现(一)

    前二天，看了Android 智能问答机器人的实现的博文，我们可以进入图灵机器人主页，根据平台接入的介绍，我们知道，主是要在客户端按一定的格式(key 必须 + userid get 非必须，上下文功能必须 +info get 必须，请求内容 + loc get 非必须，位置信息 + lon get 非必须，经度 + lat get 非必须，纬度，)，发送一个消息请求(请求方式： http get)，数据返回（JSON格式）,所以， 我只要解析返回的json格式的数据，并根据返回的数据返回码(code),来分类解析对应种类的数据，并把他们显示出来就OK了。

  上一篇博文是api接入，是自己写的一个http get方法，在这个例子中，本来我打算采用官方的java平台接入，发现官方给的api有问题，我就参照网上的资料，自己写了一个api接入方法，有兴趣的，可以看看。

1.效果图：

2.MainActivity.java----主界面类

这个界面，主要是一个listview--显示用户和机器人的对话信息，还有一个就是edittext和发送button.

package com.example.smartrobot;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import com.example.smartrobot.ChatMessage.Type;
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;

//http://blog.csdn.net/lmj623565791/article/details/38498353
//http://www.tuling123.com/openapi/cloud/access_api.jsp
//http://tech.ddvip.com/2013-08/1375807684200390.html

public class MainActivity extends Activity
{

	private ListView mChatView;
	private EditText mMsg;
	private List mDatas = new ArrayList();
	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, "hello,I'm very glad to serve you"));
	}

	public void sendMessage(View view)
	{
		final String msg = mMsg.getText().toString();
		if (TextUtils.isEmpty(msg))
		{
			Toast.makeText(this, "You do not have to fill in the information", 
					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("");

		new Thread()
		{
			public void run()
			{
				ChatMessage from = null;
				try
				{
					//from = HttpUtils.sendMsg(msg);
					from = HttpUtils.sendMessageByExample(msg);
				} catch (Exception e)
				{
					from = new ChatMessage(Type.INPUT, "Server hang...");
				}
				Message message = Message.obtain();
				message.obj = from;
				mHandler.sendMessage(message);
			};
		}.start();
	}
}

3.HttpUtils.java-----消息接受和解析类

其中方法sendMsg和sendMessageByExample是验证可用的方法，但是参考官方文档的java接入api:  sendMessageByExample02测试通不过。

package com.example.smartrobot;

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 org.apache.http.HttpResponse;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.util.EntityUtils;

import android.util.Log;

import com.example.smartrobot.ChatMessage.Type;
import com.google.gson.Gson;

public class HttpUtils
{
	public static final String TAG = "HttpUtils";
	
	public static String API_KEY = "534dc342ad15885dffc10d7b5f813451";	
	public static final String api_key_my = "5c21eaa5c118d25065c3e1f058942581";	
	public static String URL = "http://www.tuling123.com/openapi/api";

	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);
		String text = null;
		if (result.getCode() > 400000 || result.getText() == null|| result.getText().trim().equals(""))
		{
			text = "The function waiting for the development ...";
		}else
		{
			text = result.getText();
		}
		message.setMsg(text);
		message.setType(Type.INPUT);
		message.setDate(new Date());		
		return message;
	}

	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;
	}

	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("The server connection error");
			}
		} catch (Exception e)
		{
			e.printStackTrace();
			throw new CommonException("The server connection error");
		} 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();
		}
	}
		
	public static ChatMessage sendMessageByExample(String msg){
		
		ChatMessage message = new ChatMessage();		
	    String requesturl = setParams(msg);	  	    
	    String res = doGetByExample(requesturl);
	    message.setMsg(res);
		message.setType(Type.INPUT);
		message.setDate(new Date());		
		return message;
	}

	
	private static String doGetByExample(String requesturl) {
		// TODO Auto-generated method stub	
		HttpGet request = new HttpGet(requesturl); 
	    HttpResponse response = null;
		try {		
		    HttpClient httpClient = new DefaultHttpClient();    
		    response = httpClient.execute(request);   
		    Log.i(TAG, "response.toString():"+response.toString());
		} catch (ClientProtocolException e) {
			// TODO Auto-generated catch block
			Log.i(TAG, "e--2:"+e.toString());
			e.printStackTrace();
			return null;
		} catch (IOException e) {
			// TODO Auto-generated catch block
			Log.i(TAG, "e--3:"+e.toString());
			e.printStackTrace();
			return null;
		} 		
		
	    //200 is right return codes
	    if(response.getStatusLine().getStatusCode() == 200){ 
	    	try {
				String res = EntityUtils.toString(response.getEntity());
				Log.i(TAG, "res:"+res);
				Gson gson = new Gson();
				Result result = gson.fromJson(res, Result.class);
				Log.i(TAG, "result.toString():"+result.toString());
				if (result.getCode() > 400000 || result.getText() == null|| result.getText().trim().equals(""))
				{
					return "The function waiting for the development ...";
				}else
				{
					Log.i(TAG, "result.getText():"+result.getText());
					return result.getText();					
				}			
			} catch (ParseException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				return null;
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
				return null;
			}
	    }else{
	    	return null;
	    }
		
	}


	public static ChatMessage sendMessageByExample02(String msg){

		ChatMessage message = new ChatMessage();	    
	    String requesturl = setParams(msg);	 	    
	    HttpGet request = new HttpGet(requesturl); 
	    HttpResponse response = null;
		try {
			response = HttpClients.createDefault().execute(request);
		} catch (ClientProtocolException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		} 
		String result = null;
	    //200 is right return codes
	    if(response.getStatusLine().getStatusCode() == 200){ 	        
			try {
				result = EntityUtils.toString(response.getEntity());
			} catch (ParseException e) {
				// TODO Auto-generated catch block
				Log.i(TAG, "e--4:"+e.toString());
				e.printStackTrace();
			} catch (IOException e) {
				// TODO Auto-generated catch block
				Log.i(TAG, "e--5:"+e.toString());
				e.printStackTrace();
			} 
	    }else
		{
	    	result = "The function waiting for the development ...";
		} 	    
	    message.setMsg(result);
		message.setType(Type.INPUT);
		message.setDate(new Date());		
		return message;
	}	
}

4.ChatMessage----消息类的对象

package com.example.smartrobot;

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

public class ChatMessage
{
	private Type type ;
	private String msg;
	private Date date;
	private String dateStr;
	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 E");
		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;
	}

}

5.ChatMessageAdapter.java----listview的适配器

package com.example.smartrobot;

import java.util.List;
import com.example.smartrobot.ChatMessage.Type;
import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

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;
	}

	@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;
	}
}

6.Result----解析返回的json数据

package com.example.smartrobot;

public class Result
{
	private int code;
	private String text;

	public Result()
	{
	}
	
	public Result(int resultCode, String msg)
	{
		this.code = resultCode;
		this.text = msg;
	}

	public Result(int resultCode)
	{
		this.code = resultCode;
	}

	public int getCode()
	{
		return code;
	}

	public void setCode(int code)
	{
		this.code = code;
	}

	public String getText()
	{
		return text;
	}

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

}

7.不足和待完善的地方：

   (1)返回的数据解析：

    从官方api来看，返回的数据json格式分为许多种类，我们应该针对各个种类来分别解析，并且很友好的在界面显示出来。而我们只是把json的code和text解析出来了，后面的其它数据，是没有解析的。当然了， 这个数据解析不是怎么特别难，参考样例，我们分类解析就OK了。

  （2）解析完数据，我们应该采用什么方式来管理返回的数据，解析返回的数据，并把这些数据显示在界面中呢？当然，有一个笨的方法，就是采用一个一个针对功能的方法来实现，但是，编程经验告诉我们，我们应该采用针对接口的方法来实现这一部分。我可能采用的方案是观察者模式来管理，过滤和实时显示数据，这部分，有时间再来做吧。

  

8.源码下载地址：

http://download.csdn.net/download/hfreeman2008/8211255

9.参考资料：

(1)Android 智能问答机器人的实现

http://blog.csdn.net/lmj623565791/article/details/38498353

(2)图灵机器人平台接入

http://www.tuling123.com/openapi/cloud/access_api.jsp

(3)Android 网络操作常用的两个类

http://tech.ddvip.com/2013-08/1375807684200390.html