如何在內部類片段中添加進度對話框

Question

我想在片段中創建progressdialog，但不斷顯示錯誤是泄露了最初在此處添加的窗口com.android.internal.policy.impl.phonewindow。請幫助這個我的代碼

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

    @Override 
    protected void onPreExecute() { 
     progressDialog = new ProgressDialog(getActivity()); 
     progressDialog.setMessage("retrieving..."); 
     progressDialog.setIndeterminate(false); 
     progressDialog.setCancelable(false); 
    } 

    @Override 
    protected String doInBackground(String... params) { 
     try { 
      modelPost.setDataVouchers(); 
     } catch (JSONException e) { 
      e.printStackTrace(); 
     } 
     String result = modelPost.resultString; 
     if (result.length() != 0) { 
      progressDialog.dismiss(); 
     } 
     return null; 
    } 

    @Override 
    protected void onPostExecute(String result) { 
     progressDialog.dismiss(); 
     getActivity().runOnUiThread(new Runnable() { 
      @Override 
      public void run() { 
       fillDaftarHarga(); 
      } 
     }); 
    } 
} 

Answer 1

leaked window com.android.internal.policy.impl.phonewindow that was originally added here. 

上述錯誤顯示，因爲你是在doInBackground調用progressDialog.dismiss();。

Answer 2

檢查進度對話框顯示或不 ，你不能觸摸UI線程在doInBackground

@Override 
    protected void onPreExecute() { 
     progressDialog = new ProgressDialog(getActivity()); 
     progressDialog.setMessage("retrieving..."); 
     progressDialog.setIndeterminate(false); 
     progressDialog.setCancelable(false); 
     progressDialog.show(); 
    } 

    @Override 
    protected String doInBackground(String... params) { 
     try { 
      modelPost.setDataVouchers(); 
     } catch (JSONException e) { 
      e.printStackTrace(); 
     } 
     String result = modelPost.resultString; 
     return null; 
    } 

    @Override 
    protected void onPostExecute(String result) { 
     if (null != progressDialog && progressDialog.isShowing()) { 
      progressDialog.dismiss(); 
     } 
     getActivity().runOnUiThread(new Runnable() { 
      @Override 
      public void run() { 
       fillDaftarHarga(); 
      } 
     }); 
    } 
}