Question

在显示进度对话框时，我有以下代码要执行（向数据库添加一行）：

StrictMode.ThreadPolicy policy = new StrictMode.ThreadPolicy.Builder().permitAll().build();
StrictMode.setThreadPolicy(policy);
httpclient = new DefaultHttpClient();
httppost = new HttpPost("http://192.168.1.38/hu/Addpost.php?username="+username+"&fname="+firstname+"&lname="+lastname+"&dop="+now+"&content="+post3+"&type="+post_type2+"");

                try
                {

                    nameValuePairs = new ArrayList<NameValuePair>();
                    nameValuePairs.add(new BasicNameValuePair("FirstN",firstname));
                    nameValuePairs.add(new BasicNameValuePair("LastN",lastname));
                    nameValuePairs.add(new BasicNameValuePair("Content",post1));
                    nameValuePairs.add(new BasicNameValuePair("type",post_type));
                    nameValuePairs.add(new BasicNameValuePair("Dateofp",now));
                    nameValuePairs.add(new BasicNameValuePair("username",username));
                    httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs));
                    response = httpclient.execute(httppost);

                    if(response.getStatusLine().getStatusCode()==200)
                    {
                    entity=response.getEntity();
                    if(entity !=null)
                    {
                        Toast.makeText(getBaseContext(),"POST SUCCESFULLY ADDED",Toast.LENGTH_LONG).show(); 
                    }

                    }
                    else
                    {
                        Toast.makeText(getBaseContext(),"ERROR RERTY OR CHECK YOUR CONNECTION",Toast.LENGTH_LONG).show();
                    }





                    wholepost.setText("");





                }
                catch(Exception ex)
                {Toast.makeText(getBaseContext(),"CONNECTION ERROR",Toast.LENGTH_LONG).show();}

我已经尝试过AsyncTask和线程，但没有任何效果，有时它可以工作但是在添加帖子后显示了进度对话框，请问有什么帮助吗？

Answer 1

要做到这一点，你需要使用AyncTask，因为Mounzer说。要进行progressBar，您将不得不上传数据，返回并更新progressBar，加载更多数据等。

幸运的是，AsyncTask使这很容易。这个非常简单的例子计为1000 并在每次迭代时使用TextView发布结果。您可以轻松地将其更改为progressBar并将您的http post代码放在doInBVackground（）

中

protected class InitTask extends AsyncTask<Integer, String, Void> {


        // add the thread ID and count to the list
        @Override
        protected void  onProgressUpdate(String... values) {
            super.onProgressUpdate(values);
            TextView tv = new TextView(mContext);
            mThreadOutput.addView(tv);
            tv.setText(values[0]);

        }

        // do the thread work. at each iteration, set the progress to be
        // updated by the UI thread
        protected Void doInBackground(Integer... params ) {

            for (int i = 0; i < 1000; i++) {
                String s = "Thread " + params[0] + ": " + i; 
                publishProgress( s );
            }
            return null;


        }

}

添加帖子后显示进度对话框

1 个答案: