android菜鸟 问一个关于socket执行时间的问题

Question

new AsyncTask<String, Void, Void>(){
@Override
protected void onPostExecute(Void result) 
{
// TODO Auto-generated method stub
super.onPostExecute(result);
if(a==1){
Toast.makeText(CalculatorActivity.this,R.string.success,Toast.LENGTH_SHORT).show(); 
rsText.setText("");
a=0;
}
else
{
Toast.makeText(CalculatorActivity.this,R.string.fail,Toast.LENGTH_SHORT).show(); 
rsText.setText("");
}
}
@Override
protected Void doInBackground(String... arg0) {
// TODO Auto-generated method stub
String exp = rsText.getText().toString();
Socket socket;
try {
socket = new Socket(bundle.getString("ip"), 51706);
//InetAddress serverAddr = InetAddress.getByName(bundle.getString("ip")); 
Log.d("TCP", "C: Connecting..."+bundle.getString("ip")); 
Log.d("TCP", "C: Sending: '" + exp + "'"); 
PrintWriter out = new PrintWriter( new BufferedWriter( new OutputStreamWriter(socket.getOutputStream())),true);    
out.println(exp);
socket.close();
a=1;
}
catch(Exception v)
{
Log.e("TCP", "S: Error", v);
}
return null;
}
}.execute(new String[]{});

}

这是安卓客户端的程序，当服务器没有开启时，客户端会卡在try中，现在需要一个方法在try一定时间无果后，跳出toast提示。刚学android，请提点。

Answer 1

socket.connect(remoteAddr, timeout); 不是可以设置超时时间么。超时的话会抛出异常，然后catch处理之