用于httpconnection的android asynctask

Question

谁能告诉我如何解决这个问题....为什么它不起作用 我试图异步连接到服务器，这样它就可以在单独的线程上

private class SticketFunctionTask extends AsyncTask<String, Void, Void> {

    @Override
    protected Void doInBackground(String... string) {

    try {

//public void  SticketFunction(){
    //HttpClient
    HttpClient SpeedSticket = new DefaultHttpClient();
    //Response handler
    ResponseHandler<String> res = new BasicResponseHandler();

    HttpPost postMethod = new HttpPost("http://www.mysite.php");
    //Log.v("log_tag", "+-+-+-+-+-+-+-+-+- Done: HTTP Post Sending Stickit to Server");
    //Log.v("log_tag", "+-+-+-+-+-+-+-+-+- sTICKET: " + z.getString(1) + " " + z.getString(2) + " " + z.getString(3) + " " + z.getString(4));

    try {
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(5);
        nameValuePairs.add(new BasicNameValuePair("bookName", z.getString(1)+""));
        nameValuePairs.add(new BasicNameValuePair("bookAuth", z.getString(2)+""));
        nameValuePairs.add(new BasicNameValuePair("ISBN", z.getString(3)+""));
        nameValuePairs.add(new BasicNameValuePair("LibNumber", z.getString(4)+""));
        //Encode and set entity
        postMethod.setEntity(new UrlEncodedFormEntity(nameValuePairs, HTTP.UTF_8));
        //Execute 
        String response = SpeedSticket.execute(postMethod, res).replaceAll("<(.|\n)*?>","");
        if (response.equals("Done")){

            //Log.v("log_tag", "!!!!!!!!!!!!!!!!!! SticketFunction got a DONE!");

        }
        else Log.v("log_tag", "!!!!!!!?????????? SticketFunction Bad or no response: " + response);

    } catch (ClientProtocolException e) {  
        // TODO Auto-generated catch block 
        //Log.v("log_tag", "???????????????????? SticketFunction Client Exception");
    } catch (IOException e) {  
        // TODO Auto-generated catch block
        //Log.v("log_tag", "???????????????????? IO Exception");
    } 
}
    }
    }

Answer 1

如果您使用的是 Eclipse，请选择所有代码并转到 Source ->正确的缩进（或按 Ctrl-I）。然后你会看到有两个try块，但是两个catch块属于第二个try。因此，第一次尝试时需要 catch 或 finally 块。

我认为最简单的解决方法是在第二次尝试时删除该行。