HTTPGET JSONArray Android的進度

Question

我試圖獲取JSON數組我從互聯網上下載一個水平progressbardialog。 這裏是我當前的代碼

protected JSONArray doInBackground(Date... arg0) { 
    try { 
    BufferedReader in = null; 
    String result = null; 

    HttpClient client = new DefaultHttpClient(); 
    HttpConnectionParams.setSoTimeout(client.getParams(), 30000); 
    HttpConnectionParams.setConnectionTimeout(client.getParams(), 
      30000); 

    String getter = arg0[0].getDate(); 

    URI website = new URI("http://10.0.2.2/bmorg/getEvent?day=" + getter); 

    HttpGet request = new HttpGet(); 
    request.setURI(website); 

    HttpResponse response = client.execute(request); 

    in = new BufferedReader(new InputStreamReader(response 
      .getEntity().getContent())); 

    StringBuffer sb = new StringBuffer(""); 
    String l = ""; 
    String nl = System.getProperty("line.seperator"); 
    while ((l = in.readLine()) != null) { 
     sb.append(l + nl); 
    } 

    in.close(); 
    result = sb.toString(); 

    return new JSONArray(result); 
    } catch (Exception e) { 
    _worked = false; 
    e.printStackTrace(); 
    } 
    return null; 
} 

這工作得很好，但我要的是一個下載狀態。我不知道如何從我的HTTP請求和下載的字節獲得大小把這個進度條的onChange方法。

Answer 1

更新你的進步在這裏：

while ((l = in.readLine()) != null) { 
     sb.append(l + nl); 
    } 

您可以使用AsyncTask.publishProgress和AsyncTask.onProgressUpdate方法吧。

Answer 2

獲取size of the http response爲set the progress bar max的值，然後在while循環中獲得update the progress bar progress。