============问题描述============

小弟初学安卓开发。最近需要做一个图片上传的功能。
我是用java开发安卓，调用C#的WebService。在网上找到一大堆资料，几乎全部是用ksoap2包的。
请注意，我想做的是不用ksoap包的。
我现在的方法是从android端用读取到要上传的图片，用Base64编码成字节流的字符串，通过调用webservice把该字符串作为参数传到服务器端，服务端解码该字符串，最后保存到相应的路径下。整个上传过程的关键就是以字节流的字符串进行数据传递。
功能代码如下：

WebService：

public string uploadImage(string filename, string image){FileStream fs = null;try{string toDir = "E:\\C# Project\\Dev\\GPRSDataIn\\GPRSDataIn\\Images";fs = new FileStream(filename, FileMode.Create);byte[] buffer = Encoding.UTF8.GetBytes(image);fs.Write(buffer, 0, buffer.Length);fs.Flush();fs.Close();return "上传图片成功!" + "图片路径为：" + toDir;}catch (Exception e){}return "上传图片失败！";}

安卓端：调用WebService方法

public class UploadUtil {private static HttpConnSoap Soap = new HttpConnSoap();public static void uploadImage(String filename, String image) {ArrayList<String>arrayList=new ArrayList<String>();ArrayList<String>brrayList=new ArrayList<String>();arrayList.clear();brrayList.clear();arrayList.add("filename");arrayList.add("image");brrayList.add(filename);brrayList.add(image);Soap.GetWebServre("uploadImage", arrayList, brrayList);}}

public class HttpConnSoap {/*** 获取返回的InputStream，为了增强通用性，在方法内不对其进行解析。* * @param methodName*            webservice方法名* @param Parameters*            webservice方法对应的参数名* @param ParValues*            webservice方法中参数对应的值* @return 未解析的InputStream*/public InputStream GetWebServre(String methodName, ArrayList<String> Parameters, ArrayList<String> ParValues) {// 指定URL地址，我这里使用的是常量。String ServerUrl = "http://www.bsri.com.cn:99/ws3/Service1.asmx";// soapAction = 命名空间 + 方法名String soapAction = "http://tempuri.org/" + methodName;// 拼凑requestDataString soap = "<?xml version=\"1.0\" encoding=\"utf-8\"?>"+ "<soap:Envelope xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\" xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\" xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\">"+ "<soap:Body />";String tps,vps,ts;String mreakString = "";mreakString = "<" + methodName + " xmlns=\"http://tempuri.org/\">";for (int i = 0; i < Parameters.size(); i++){tps = Parameters.get (i).toString();//设置该方法的参数为.net webService中的参数名称vps = ParValues.get (i).toString();ts = new String("<" + tps + ">" + vps + "</" + tps + ">");mreakString = mreakString + ts;}mreakString = mreakString + "</" + methodName + ">";String soap2 = "</soap:Envelope>";String requestData = soap + mreakString + soap2;// 其上所有的数据都是在拼凑requestData，即向服务器发送的数据try {URL url = new URL(ServerUrl); // 指定服务器地址HttpURLConnection con = (HttpURLConnection) url.openConnection();// 打开链接byte[] bytes = requestData.getBytes("utf-8"); // 指定编码格式，可以解决中文乱码问题con.setDoInput(true); // 指定该链接是否可以输入con.setDoOutput(true); // 指定该链接是否可以输出con.setUseCaches(false); // 指定该链接是否只用cachescon.setConnectTimeout(6000); // 设置超时时间con.setRequestMethod("POST"); // 指定发送方法名，包括Post和Get。con.setRequestProperty("Content-Type", "text/xml;charset=utf-8"); // 设置（发送的）内容类型con.setRequestProperty("SOAPAction", soapAction); // 指定soapActioncon.setRequestProperty("Content-Length", "" + bytes.length); // 指定内容长度// 发送数据OutputStream outStream = con.getOutputStream();outStream.write(bytes);outStream.flush();outStream.close();// 获取数据// con.connect();BufferedInputStream ois = new BufferedInputStream(con.getInputStream());byte[] revBytes = new byte[20480];ois.read(revBytes);//InputStream inputStream = new ByteArrayInputStream(revBytes);String s = new String(revBytes);String newS = s.replaceAll("&lt;", "<");String newS1 = newS.replaceAll("&gt;", ">");ByteArrayInputStream bais = new ByteArrayInputStream(newS1.getBytes());return bais;} catch (Exception e) {e.printStackTrace();return null;}}}

触发上传方法：

@Overridepublic void onClick(View v) {switch (v.getId()) {case R.id.selectImage:/*** * 这个是调用android内置的intent，来过滤图片文件 ，同时也可以过滤其他的 */Intent intent = new Intent();intent.setType("image/*");intent.setAction(Intent.ACTION_GET_CONTENT);startActivityForResult(intent, 1);break;case R.id.uploadImage:if (picPath == null) {Toast.makeText(Upload.this, "请选择图片！", 1000).show();} else {final File file = new File(picPath);if (file != null) {UploadUtil.uploadImage(imgName, photodata);}}break;default:break;}}@Overrideprotected void onActivityResult(int requestCode, int resultCode, Intent data) {if (resultCode == Activity.RESULT_OK) {/** * 当选择的图片不为空的话，在获取到图片的途径 */Uri uri = data.getData();try {Cursor cursor = getContentResolver().query(uri, null, null,null, null);if (cursor != null) {ContentResolver cr = this.getContentResolver();cursor.moveToFirst();String path = cursor.getString(1); // 图片文件路径imgName = cursor.getString(3); // 图片文件名if (path.endsWith("jpg") || path.endsWith("png")) {picPath = path;Bitmap bitmap = BitmapFactory.decodeStream(cr.openInputStream(uri));imageView.setImageBitmap(bitmap);FileInputStream fis = new FileInputStream(path);ByteArrayOutputStream baos = new ByteArrayOutputStream();byte[] buffer = new byte[20480];int count = 0;while ((count = fis.read(buffer)) >= 0) {baos.write(buffer, 0, count);}byte[] bytes = baos.toByteArray();photodata = Base64.encodeToString(bytes, Base64.DEFAULT);} else {alert();}} else {alert();}} catch (Exception e) {}}super.onActivityResult(requestCode, resultCode, data);}

我感觉理论上是没有什么问题的，但是实际上，执行到调用WebService的时候，拼接请求时， ts = new String("<" + tps + ">" + vps + "</" + tps + ">");这里可能是图片转base64编码的String串长度太长，导致内存溢出。
如何解决，望各位大神指教！或者程序有什么错还请大神们指出，或者教我用合适的方法。小弟分不多，还请见谅。

============解决方案1============

   void submieGson(String users){try {HttpClient httpClient = new DefaultHttpClient();HttpPost httppost = new HttpPost("http://*/jsonws/frank/ftocservice/getUserInfo");List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();nameValuePairs.add(new BasicNameValuePair("users", users));nameValuePairs.add(new BasicNameValuePair("file", getFileString()));httppost.setEntity(new UrlEncodedFormEntity(nameValuePairs,HTTP.UTF_8));HttpResponse response = httpClient.execute(httppost);System.out.println("rescode ="+response.getStatusLine().getStatusCode());if (response.getStatusLine().getStatusCode() == 200) {String str = EntityUtils.toString(response.getEntity(),"utf-8");System.out.println("json ========"+str);Message msg = Message.obtain();msg.obj = str;mHandler.sendMessage(msg);}} catch (Exception e) {e.printStackTrace();}}

String getFileString() {String fileStream = null;FileInputStream fis;try {fis = new FileInputStream(Environment.getExternalStorageDirectory().getPath() + "/QuickCheck/image/temp.png");ByteArrayOutputStream baos = new ByteArrayOutputStream();byte[] buffer = new byte[1024];int count = 0;while ((count = fis.read(buffer)) >= 0) {baos.write(buffer, 0, count);}fis.close();fileStream = new String(Base64.encode(baos.toByteArray(),Base64.DEFAULT)); // 进行Base64编码} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}return fileStream;}

使用post进行提交