android.view.ViewRoot$CalledFromWrong 这个异常怎么解决。。

这个冬天有点冷灬 2013-12-09 09:06:13

就是用socket编程，已经能和服务端连上了，主要是服务端发来消息后要在TextView上显示，一开始单独写个类把activity传进去直接改里面的TextView，发现不行，就出现上面的异常，百度后说要用handler，就照上面用了handler,可是发现还是不行，别人说不能传activity，应该把操作都放在activity里面，好吧，接着改(其实也没啥就是挪个地方)，后来发现还是不行，还是这个异常，我下面贴代码，大家给看看啊。。

package com.example.chatphone;



import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.Socket;

import java.net.UnknownHostException;



import android.os.Bundle;

import android.os.Handler;

import android.os.Message;

import android.app.Activity;

import android.view.Menu;

import android.view.View;

import android.view.View.OnClickListener;

import android.widget.Button;

import android.widget.EditText;

import android.widget.TextView;



public class MainActivity extends Activity {

	private TextView disText = null;

	private EditText input = null;

	private Button btnSend = null;

	private MyHandler myHandler = null;



	private BufferedReader BR = null;

	private PrintWriter PW = null;

	private Socket s = null;

	private boolean isConnectioned = false;

	private Thread thRecv = null;



	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		myHandler = new MyHandler();

		disText = (TextView) findViewById(R.id.disText);

		input = (EditText) findViewById(R.id.input);

		btnSend = (Button) findViewById(R.id.btnSend);

		connection();

		btnSend.setOnClickListener(new OnClickListener() {



			@Override

			public void onClick(View v) {

				send("hello");

			}

		});

	}



	@Override

	public boolean onCreateOptionsMenu(Menu menu) {

		getMenuInflater().inflate(R.menu.main, menu);

		return true;

	}



	/**

	 * 定义handle提醒ui更新

	 */

	class MyHandler extends Handler {



		@Override

		public void handleMessage(Message msg) {

			super.handleMessage(msg);

			Bundle b = msg.getData();

			String msgStr = b.getString("msg");

			disText.setText(msgStr);

		}

	}



	private class Recv implements Runnable {



		@Override

		public void run() {

			while (true) {

				try {

					System.out.println("run");

					String msgStr = BR.readLine();

					Message msg = new Message();

					Bundle b = new Bundle();

					b.putString("msg", msgStr);

					msg.setData(b);

					System.out.println(msg + "->>");

					MainActivity.this.myHandler.handleMessage(msg);

				} catch (IOException e) {

					e.printStackTrace();

				}

			}

		}

	}



	private void connection() {

		try {

			isConnectioned = true;

			s = new Socket("169.254.66.14", 8888);

			BR = new BufferedReader(new InputStreamReader(s.getInputStream()));

			PW = new PrintWriter(s.getOutputStream());

			thRecv = new Thread(new Recv());

			thRecv.start();

		} catch (UnknownHostException e) {

			e.printStackTrace();

		} catch (IOException e) {

			e.printStackTrace();

		}

	}



	/**

	 * 像服务器发送消息

	 * 

	 * @param msg

	 *            要发送的消息

	 */

	private void send(String msg) {

		PW.println(msg);

		PW.flush();

	}

}