RobotFragmentActivity.java

package com.ustc.dystu.dandelion;

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

import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v4.app.FragmentActivity;
import android.text.TextUtils;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Window;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ListView;
import android.widget.Toast;

import com.ustc.dystu.dandelion.adapter.ChatMessageAdapter;
import com.ustc.dystu.dandelion.bean.ChatMessage;
import com.ustc.dystu.dandelion.bean.ChatMessage.Type;
import com.ustc.dystu.dandelion.utils.HttpUtils;

public class RobotFragmentActivity extends FragmentActivity {

	private ListView mMsgs;

	private ChatMessageAdapter mAdapter;

	private List<ChatMessage> mDatas;

	private EditText mInputMsg;

	private Button mSendMsg;

	private Handler mHandler = new Handler() {

		public void handleMessage(android.os.Message msg) {

			// 等待接收，子线程完成数据的返回
			ChatMessage fromMessge = (ChatMessage) msg.obj;
			mDatas.add(fromMessge);
			mAdapter.notifyDataSetChanged();
			mMsgs.setSelection(mDatas.size() - 1);

		};

	};

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		setContentView(R.layout.activity_fragment_robot);
		initView();
		initDatas();
		// 初始化事件
		initListener();
	}

	private void initListener() {
		mSendMsg.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				final String toMsg = mInputMsg.getText().toString();
				if (TextUtils.isEmpty(toMsg)) {
					Toast.makeText(RobotFragmentActivity.this, "发送消息不能为空！",
							Toast.LENGTH_SHORT).show();
					return;
				}

				ChatMessage toMessage = new ChatMessage();
				toMessage.setDate(new Date());
				toMessage.setMsg(toMsg);
				toMessage.setType(Type.OUTCOMING);
				mDatas.add(toMessage);
				mAdapter.notifyDataSetChanged();
				mMsgs.setSelection(mDatas.size()-1);
				
				mInputMsg.setText("");
				
				
				new Thread() {
					public void run() {
						ChatMessage fromMessage = HttpUtils.sendMessage(toMsg);
						Message m = Message.obtain();
						m.obj = fromMessage;
						mHandler.sendMessage(m);
					};
				}.start();

			}
		});

	}

	private void initDatas() {
		mDatas = new ArrayList<ChatMessage>();
		mDatas.add(new ChatMessage("您好,我是机器人友友,我可以查公交,查天气,讲笑话,讲故事等等,让我来陪你吧.", Type.INCOMING, new Date()));
		mAdapter = new ChatMessageAdapter(this, mDatas);
		mMsgs.setAdapter(mAdapter);
	}

	private void initView() {
		mMsgs = (ListView) findViewById(R.id.id_listview_msgs);
		mInputMsg = (EditText) findViewById(R.id.id_input_msg);
		mSendMsg = (Button) findViewById(R.id.id_send_msg);
	}
}