我的这个程序在没有Button监听的时候没有出错 可是加上了一个Button监听就不能运行了是为什么啊?

Question

问题在b1上 去掉b1的监听就能运行，可是加上监听就不能运行了。。谁能帮我看看~
public static final String host = "10.10.9.132";
public static final int SERVERPORT = 10000;
Thread th = null;
Socket s = null;
BufferedReader br = null;
PrintWriter pw = null;
private EditText et1 = null;
private EditText et2 = null;
String str1 = "";
private Button b1 = null;
private Button b2 = null;
private Button b3 = null;
private Button b4 = null;
//private Runnable mRunnable;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    b1 = (Button)findViewById(R.id.button1);
    b2 = (Button)findViewById(R.id.button2);
    b3 = (Button)findViewById(R.id.button3);
    b4 = (Button)findViewById(R.id.button4);
    et1 = (EditText)findViewById(R.id.editText1);
    et2 = (EditText)findViewById(R.id.editText2);

b1.setOnClickListener(new Button.OnClickListener(){
public void onClick(View v){

try {
s= new Socket(host,SERVERPORT);
pw = new PrintWriter(s.getOutputStream(),true);
br = new BufferedReader(new InputStreamReader(s.getInputStream()));

    } catch (UnknownHostException e) {
        e.printStackTrace();
    } catch (IOException e) {

        e.printStackTrace();
    }
                    } 
    });
    //发送消息。。
    b2.setOnClickListener(new OnClickListener(){
        public void onClick(View v){
            try{
            //取得编辑框中输入的消息。。
            String str = et2.getText().toString() +"/n";
            et2.setText("");
            //发送给服务器。。
            pw.print(str);
            pw.flush();
        }catch (Exception e){
            Log.e(DEBUG_TAG,e.toString());
        }   
    }
    });
    b3.setOnClickListener(new OnClickListener(){

        public void onClick(View v) {
            // TODO Auto-generated methd stub
        String ss = "button33333";
        pw.print(ss);
        pw.flush();
        }

    });


     th = new Thread(mRunnable);
    th.start();
}
//监听服务器发来的消息。。
private Runnable mRunnable = new Runnable()
{
    public void run() 
    {
        while (true){

            try {
                if ((str1 = br.readLine()) != null)
                {//消息换行。。
            str1 += "/n";
            mHandler.sendMessage(mHandler.obtainMessage());
                }//发送消息。。
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
    }
};
Handler mHandler =new Handler(){
    public void handleMessage(Message msg){
        //刷新
        super.handleMessage(msg);
        try
        {
            //将聊天记录添加进来
            et1.append(str1);
        }catch(Exception e){
            Log.e(DEBUG_TAG,e.toString());
        }
    }
};

Answer 1

[quote]想把if ((str1 = br.readLine()) != null)拿出来放到b1里;[/quote]
我想这个不是放在哪的问题，你的br是全局的变量，无论放到哪个方法中就是可以的。
但这不是原因所在，原因还在流上。
[code="java"]
s= new Socket(host,SERVERPORT);
pw = new PrintWriter(s.getOutputStream(),true);
br = new BufferedReader(new InputStreamReader(s.getInputStream()));[/code]