AsyncTask Android無法更新進度環

Question

我寫了一個asynctask來處理json，json結果很長（需要40-70秒才能在2G上處理）。函數僅在獲取並處理json之後執行（在postexecute（）之前）。我如何更新每一秒。

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我refered：Android, java - Unable to update variable from asynctask

Instance variable of Activity not being set in onPostExecute of AsyncTask or how to return data from AsyncTask to main UI thread

Answer 1

使用AsyncHttpClient與您.gradle文件進度

過程中添加compile 'com.loopj.android:android-async-http:1.4.6'

現在創建一個服務類，並聲明它你的androidmanifest.xml

下一頁在onStartCommand在服務類：

@Override 
public int onStartCommand(Intent intent, int flags, int startId) { 
    Log.e(TAG, "onStartCommand"); 

    try { 

     AsyncHttpClient client = new AsyncHttpClient(); 
     client.setURLEncodingEnabled(true); 

     client.post(this, url, params, new AsyncHttpResponseHandler() { 
      @Override 
      public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) { 

        // you code here after the work is done      

       stopService(); 
      } 

      @Override 
      public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) { 

       //your code here 
       stopService(); 

      } 

      @Override 
      public void onProgress(int bytesWritten, int totalSize) { 
       super.onProgress(bytesWritten, totalSize); 
       Log.e("Progess", "" + (bytesWritten/totalSize) * 100 + "%"); 

      } 
     }); 


    } catch (FileNotFoundException e) { 
     e.printStackTrace(); 
    } 

    return super.onStartCommand(intent, flags, startId); 
} 

，並從活動通話

startService(serviceIntent); 

Answer 2

使用publishProgress從doInBackground()像

protected Void doInBackground(Integer... params) 
{ 
    publishProgress("Loading Questions... Please wait..."+per); 
    ... 
}