Android 怎样实现同步更新数据库中的表

自己做出来了  把sqlite 文件转成string,然后用web service上传string. private void uploadFile()
  {
  try
    {
        FileInputStream fis = new FileInputStream(srcPath);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        byte[] buffer = new byte[98192];
        int count = 0;   
        while ((count = fis.read(buffer)) >= 0)
        {
            baos.write(buffer, 0, count);
        }
        String image = new String(Base64.encode(baos.toByteArray()));
        fis.close();      
        SoapObject request = new SoapObject(LoginUI.NAMESPACE, LoginUI.METHOD_NAME2);
        request.addProperty("image", image);
        SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(
                SoapEnvelope.VER11);
     envelope.dotNet = true;
        envelope.bodyOut = request;
        HttpTransportSE ht = new HttpTransportSE(LoginUI.URL);
        ht.call(LoginUI.NAMESPACE+LoginUI.METHOD_NAME2, envelope);
        if (envelope.getResponse() != null)
        {
            org.ksoap2.serialization.SoapPrimitive soapPrimitive = (SoapPrimitive) envelope
                    .getResponse();
            boolean result = Boolean.parseBoolean(soapPrimitive.toString());   
            if (result)   
                Toast.makeText(this, "Synchronize Successful.", Toast.LENGTH_LONG).show();   
            else  
                Toast.makeText(this, "Synchronize Fail.", Toast.LENGTH_LONG).show();   
        }
    }
    catch (Exception e)
    {
        Log.d("updateImage_exception", String.valueOf(e));
    }
  }server 端用VS2005建的web service,读取string 再回转成sqlite file 就可以了
public bool UploadFile (string image){
byte[]b =System.Convert.FromBase64String(image);
FileStream f=new FileStream(C:\\msir.db,FileMode.Create);
f.Write(m,0,m.Length);
return ture;
}