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在我的应用程序中,我将图像转换为bas64字符串并将其添加到JSON对象以发送到服务器。问题似乎是字符串太大了?最初我得到了一个内存不足的错误,现在响应只是返回null,并且我调试了它,直到我发现它传递给我的StringEntity对象的字符串太大。我已经阅读了很多其他答案,但都没有工作,或者他们只是不太适用于我需要做的事情。该代码如下JSON字符串对于StringEntity来说太大

@Override 
    protected String doInBackground(JSONArray... params) { 

     JSONObject allPostObj = new JSONObject(); 
     try { 

      allPostObj.put("receiptImgs", params[0]); 

      //Log.e("in obj Try" , allPostObj.toString()); 

      DefaultHttpClient httpClient = new DefaultHttpClient(); 
      // WCF service path 
      HttpPost httpPost = new HttpPost("http://localhost/path"); 
      HttpParams httpParameters = new BasicHttpParams(); 
      // Set the timeout in milliseconds until a connection is established. 
      // The default value is zero, that means the timeout is not used. 
      int timeoutConnection = 10000; 
      HttpConnectionParams.setConnectionTimeout(httpParameters, timeoutConnection); 
      // Set the default socket timeout (SO_TIMEOUT) 
      // in milliseconds which is the timeout for waiting for data. 
      int timeoutSocket = 10000; 
      HttpConnectionParams.setSoTimeout(httpParameters, timeoutSocket); 
      httpPost.setParams(httpParameters); 
      StringEntity se = new StringEntity(allPostObj.toString()); 
      Log.e("DEBUGGING",allPostObj.toString()); 
      se.setContentType("application/json;charset=UTF-8");     
      httpPost.setEntity(se); 

      HttpResponse httpResponse = httpClient.execute(httpPost);   
      HttpEntity httpEntity = httpResponse.getEntity(); 

      BufferedReader reader = new BufferedReader(new InputStreamReader(httpEntity.getContent())); 
      String readLine = reader.readLine(); 
      Log.d("DEBUG RESPONSE",readLine); 
      JSONObject jsonResponse = new JSONObject(readLine); 

      answer = jsonResponse.getString("saveImageResult"); 
      Log.e("returning", answer); 
     } 

和更换线路

StringEntity se = new StringEntity(allPostObj.toString()); 

有了:

StringEntity se = new StringEntity("{\"receiptImgs\":[{\"imgString\":\"\",\"imgPath\":\"test\"}]}"); 

工作得很好

任何想法,将不胜感激

回答

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你寿ld对于大型内容不使用StringEntity,您应该切换到FileEntityInputStreamEntity,这取决于您存储数据的位置。


速战速决,你可以尝试(不编译/测试):

InputStream stream = new ByteArrayInputStream(allPostObj.toString().getBytes("UTF-8")); 
InputStreamEntity entity = new InputStreamEntity(stream , -1); 
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有很好的链接InputStreamEntity? – KBusc

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和任何想法这将如何改变我的后端?有什么我需要在那里改变 – KBusc

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为什么不使用FileEntity?图像可能非常大,在将图像转换为json时,应该以流方式进行,并将结果存储在文件中,不要将所有数据加载到内存中,否则OOM错误会在大多数意想不到的时刻不时出现。 – marcinj

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