我想下载一个文件Jason 我为Jason下载了一个进度条.. 我的问题是进度条没有更新。 正确下载但不更新进度条 问题是什么 ？ java代码：
public class GetJsonTask extends AsyncTask<String, String, String>
{
@Override
protected void onProgressUpdate(String... progress) {
// setting progress percentage
dialog.setProgress(Integer.parseInt(progress[0]));
}
protected void onPreExecute()
{
dialog = new ProgressDialog(MainActivity.this);
dialog.setMessage("Downloading " + " from the server. Please wait.");
dialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
dialog.setCancelable(false);
dialog.setCanceledOnTouchOutside(false);
dialog.show();
}
@Override
protected String doInBackground(String... urls) {
// TODO Auto-generated method stub
try {
InputStream inputStream = null;
DefaultHttpClient defaultHttpClient = new DefaultHttpClient();
HttpPost httpPost = new HttpPost(urls[0]);
HttpResponse httpResponse = defaultHttpClient.execute(httpPost);
HttpEntity httpEntity = httpResponse.getEntity();
inputStream = httpEntity.getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(inputStream, "iso-8859-1"), 8);
StringBuilder sb = new StringBuilder();
String line = null;
while ((line = reader.readLine()) != null) {
sb.append(line + "\n");
}
byte data[] = new byte[1024];
long total = 0;
while ((count = reader.read()) != -1) {
total += count;
// publishing the progress....
// After this onProgressUpdate will be called
publishProgress(""+(int) ((total*100) / 10000) );
}
inputStream.close();
String result = sb.toString();
return result;
} catch (Exception ex) {
Log.e("aa2", "erroor2"+ex.toString());
return null;
}
}
@Override
protected void onPostExecute(String result) {
// TODO Auto-generated method stub
super.onPostExecute(result);
dialog.dismiss();
}
}