Android 智能问答机器人的实现

android:layout_toLeftOf=“@id/id_chat_send”

android:background=“@drawable/login_edit_normal”

android:singleLine=“true”

android:textSize=“18sp” />

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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” >

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;