將多個jpgs保存到SD卡

我正在從parse.com下載圖像。我永遠不知道我將擁有的圖像數量，所以我正在使用計數器來檢索它們。出於某種原因，我的計數器達到5，並下載圖像5次。在我的存儲中，我只有一個圖像。這裏是我的代碼：將多個jpgs保存到SD卡

String root = Environment.getExternalStorageDirectory().toString(); 
int i = 0;

檢索圖像：

ParseQuery<ParseObject> query = ParseQuery.getQuery("fightGallery"); 
    query.findInBackground(new FindCallback<ParseObject>() { 
     @Override 
     public void done(List<ParseObject> parseObjects, com.parse.ParseException e) { 
      if (e == null) { 

       int size = parseObjects.size(); 
       Log.d("query size", "size is " + size + " int i is " + i); 
       while (i < size) { 
        ParseFile fileObject = parseObjects.get(i).getParseFile("image"); 

        fileObject.getDataInBackground(new GetDataCallback() { 
         @Override 
         public void done(byte[] bytes, ParseException e) { 
          if (e == null) { 
           Log.d("Data", "We have data successfully " +i); 

           Bitmap bmp = BitmapFactory.decodeByteArray(bytes, 0, bytes.length); 
           saveImagesInSdCard(bmp, i); 


          } else { 
           Log.d("ERROR: ", "" + e.getMessage()); 
           progressDialog.dismiss(); 
          } 
         } 
        }); 
        i++; 
       } 
      } else { 
       Log.d("ERROR:", "" + e.getMessage()); 
       progressDialog.dismiss(); 
      } 
     } 
    });

這是我saveImagesInSdCard()

private void saveImagesInSdCard(Bitmap bmp, int i) { 


    File myDir = new File(root + "/clash_images"); 
    myDir.mkdirs(); 
    String fname = "Image"; 
    File file = new File(myDir, fname+i+".jpg"); 
    // if (file.exists()) file.delete(); 
    Log.d("IMAGE", "SAVED " +fname + i); 

    try { 
     FileOutputStream out = new FileOutputStream(file); 
     bmp.compress(Bitmap.CompressFormat.PNG, 90, out); 
     out.flush(); 
     out.close(); 

    } catch (FileNotFoundException e1) { 
     e1.printStackTrace(); 
    } catch (IOException e2) { 
     e2.printStackTrace(); 
    } 


}

，這裏是我的logcat顯示所有我Log.d

08-07 12:54:45.586 10403-10403/com.codealchemist.clashmma D/query size: size is 5 int i is 0 
08-07 12:54:46.407 10403-10403/com.codealchemist.clashmma D/Data: We have data successfully 5 
08-07 12:54:46.527 10403-10403/com.codealchemist.clashmma D/IMAGE: SAVED Image5 
08-07 12:54:48.079 10403-10403/com.codealchemist.clashmma I/Choreographer: Skipped 100 frames! The application may be doing too much work on its main thread. 
08-07 12:54:48.089 10403-10403/com.codealchemist.clashmma D/Data: We have data successfully 5 
08-07 12:54:48.199 10403-10405/com.codealchemist.clashmma D/dalvikvm: GC_CONCURRENT freed 8524K, 20% free 38799K/48391K, paused 13ms+4ms, total 60ms 
08-07 12:54:48.199 10403-10403/com.codealchemist.clashmma D/IMAGE: SAVED Image5 
08-07 12:54:50.131 10403-10403/com.codealchemist.clashmma D/Data: We have data successfully 5 
08-07 12:54:50.181 10403-10403/com.codealchemist.clashmma D/IMAGE: SAVED Image5 
08-07 12:54:51.242 10403-10403/com.codealchemist.clashmma D/Data: We have data successfully 5 
08-07 12:54:51.312 10403-10403/com.codealchemist.clashmma D/IMAGE: SAVED Image5 
08-07 12:54:53.494 10403-10403/com.codealchemist.clashmma I/Choreographer: Skipped 323 frames! The application may be doing too much work on its main thread.

正如你所看到的，在我的logcat中，我的i永遠不會從5改變。我如何構造這個來下載所有5個圖像？

來源

2013-08-07 Chad Bingham

我的問題是GetDataCallback花費的時間太長。所以我的計數器i在設置文件名之前已經達到了5。所以我的解決方案只是在我的GetDataCallback中添加了另一個計數器。評論你是否需要看代碼。

來源

2013-08-14 00:18:51

當您的GetDataCallback在文件下載後執行時，循環運行5次，因此i的值每次爲5。

來源

2013-08-07 19:43:37

我可以從我的logcat中看到。但是爲什麼5次不運行我的'GetDataCallback'，所以我可以下載所有5個圖像？ –

我明白我的'getdatacallback'只能在第5個循環中運行。我的問題赫克託，是我如何讓我的數據通話重新運行5次？ –

它正在運行五次，正如您在日誌中看到的那樣。問題在於在執行回調之前使用一個正在變異的變量。 –

將多個jpgs保存到SD卡

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