diff --git a/sdk/android_sdk/SDK/project.properties b/sdk/android_sdk/SDK/project.properties
index 337e8f37..e61077f7 100644
--- a/sdk/android_sdk/SDK/project.properties
+++ b/sdk/android_sdk/SDK/project.properties
@@ -8,5 +8,5 @@
 # project structure.
 
 # Project target.
-target=android-7
+target=android-17
 android.library=true
diff --git a/sdk/android_sdk/SDK/src/com/wbtech/ums/UmsAgent.java b/sdk/android_sdk/SDK/src/com/wbtech/ums/UmsAgent.java
index 83923ee2..f6dc12e9 100644
--- a/sdk/android_sdk/SDK/src/com/wbtech/ums/UmsAgent.java
+++ b/sdk/android_sdk/SDK/src/com/wbtech/ums/UmsAgent.java
@@ -20,7 +20,6 @@
 import java.util.Iterator;
 import java.util.Locale;
 
-import org.apache.http.util.LangUtils;
 import org.json.JSONArray;
 import org.json.JSONException;
 import org.json.JSONObject;
@@ -654,7 +653,7 @@ private static void uploadAllLog(Context context) {
                     sb.append(new String(s, 0, i));
                 }
                 if (CommonUtil.isNetworkAvailable(context)) {
-                    MyMessage message = NetworkUitlity.post(UmsConstants.preUrl
+                    MyMessage message = NetworkUitlity.postCompressed(UmsConstants.preUrl
                             + UmsConstants.uploadUrl, sb + "");
                     if (message.isFlag()) {
                         File file = new File(Environment.getExternalStorageDirectory()
diff --git a/sdk/android_sdk/SDK/src/com/wbtech/ums/common/CommonUtil.java b/sdk/android_sdk/SDK/src/com/wbtech/ums/common/CommonUtil.java
index 91510d05..660e2003 100644
--- a/sdk/android_sdk/SDK/src/com/wbtech/ums/common/CommonUtil.java
+++ b/sdk/android_sdk/SDK/src/com/wbtech/ums/common/CommonUtil.java
@@ -17,6 +17,10 @@
 import java.util.Date;
 import java.util.List;
 
+import org.json.JSONArray;
+import org.json.JSONException;
+import org.json.JSONObject;
+
 import android.app.ActivityManager;
 import android.content.ComponentName;
 import android.content.Context;
@@ -38,10 +42,6 @@
 import com.wbtech.ums.objects.LatitudeAndLongitude;
 import com.wbtech.ums.objects.SCell;
 
-import org.json.JSONArray;
-import org.json.JSONException;
-import org.json.JSONObject;
-
 public class CommonUtil {
     
     public static void saveInfoToFile(Handler handler,String type, JSONObject info, Context context) {
@@ -471,42 +471,75 @@ public static boolean isHaveGravity(Context context){
    * @return  WIFI or MOBILE
    */
   public static String getNetworkType(Context context){
-      TelephonyManager manager = (TelephonyManager)context.getSystemService(Context.TELEPHONY_SERVICE);
-    int type=  manager.getNetworkType();
-    String typeString="UNKNOWN";
-    if(type==TelephonyManager.NETWORK_TYPE_CDMA){
-    	typeString ="CDMA";
-    }
-    if(type==TelephonyManager.NETWORK_TYPE_EDGE){
-    	typeString ="EDGE";
-    }
-    if(type==TelephonyManager.NETWORK_TYPE_EVDO_0){
-    	typeString ="EVDO_0";
-    }
-    if(type==TelephonyManager.NETWORK_TYPE_EVDO_A){
-    	typeString ="EVDO_A";
-    }
-    if(type==TelephonyManager.NETWORK_TYPE_GPRS){
-    	typeString ="GPRS";
-    }
-    if(type==TelephonyManager.NETWORK_TYPE_HSDPA){
-    	typeString ="HSDPA";
-    }
-    if(type==TelephonyManager.NETWORK_TYPE_HSPA){
-    	typeString ="HSPA";
-    }
-    if(type==TelephonyManager.NETWORK_TYPE_HSUPA){
-    	typeString ="HSUPA";
-    }
-    if(type==TelephonyManager.NETWORK_TYPE_UMTS){
-    	typeString ="UMTS";
-    }
-    if(type==TelephonyManager.NETWORK_TYPE_UNKNOWN){
-    	typeString ="UNKNOWN";
-    }
-   
-	return typeString;
-  }
+		String typeString = "UNKNOWN";
+		// check if wifi or mobile first
+		final ConnectivityManager connectivityManager = (ConnectivityManager) context
+				.getSystemService(Context.CONNECTIVITY_SERVICE);
+		final NetworkInfo mobNetInfoActivity = connectivityManager.getActiveNetworkInfo();
+		if (mobNetInfoActivity == null || !mobNetInfoActivity.isAvailable()) {
+			return typeString;
+		}
+
+		int netType = mobNetInfoActivity.getType();
+		if (netType == ConnectivityManager.TYPE_WIFI) {
+			return "wifi";
+		} else if (netType == ConnectivityManager.TYPE_MOBILE) {
+			// for mobile net
+			TelephonyManager manager = (TelephonyManager) context.getSystemService(Context.TELEPHONY_SERVICE);
+			int type = manager.getNetworkType();
+
+			switch (type) {
+			case TelephonyManager.NETWORK_TYPE_GPRS:
+				typeString = "GPRS";
+				break;
+			case TelephonyManager.NETWORK_TYPE_EDGE:
+				typeString = "EDGE";
+				break;
+			case TelephonyManager.NETWORK_TYPE_UMTS:
+				typeString = "UMTS";
+				break;
+
+			case TelephonyManager.NETWORK_TYPE_CDMA:
+				typeString = "CDMA";
+				break;
+			case TelephonyManager.NETWORK_TYPE_EVDO_0:
+				typeString = "EVDO rev. 0";
+				break;
+			case TelephonyManager.NETWORK_TYPE_EVDO_A:
+				typeString = "EVDO rev. A";
+				break;
+			case TelephonyManager.NETWORK_TYPE_1xRTT:
+				typeString = "1xRTT";
+				break;
+			case TelephonyManager.NETWORK_TYPE_HSDPA:
+				typeString = "HSDPA";
+				break;
+			case TelephonyManager.NETWORK_TYPE_HSUPA:
+				typeString = "HSUPA";
+				break;
+			case TelephonyManager.NETWORK_TYPE_HSPA:
+				typeString = "HSPA";
+				break;
+			case TelephonyManager.NETWORK_TYPE_IDEN:
+				typeString = "iDen";
+				break;
+			case TelephonyManager.NETWORK_TYPE_EVDO_B:
+				typeString = "EVDO rev. B";
+				break;
+			case TelephonyManager.NETWORK_TYPE_LTE:
+				typeString = "LTE";
+				break;
+			case TelephonyManager.NETWORK_TYPE_EHRPD:
+				typeString = "eHRPD";
+				break;
+			case TelephonyManager.NETWORK_TYPE_HSPAP:
+				typeString = "HSPA+";
+				break;
+			}
+
+		}
+		return typeString;
+	}
   /**
    * Determine the current network type  
    * @param context
diff --git a/sdk/android_sdk/SDK/src/com/wbtech/ums/common/NetworkUitlity.java b/sdk/android_sdk/SDK/src/com/wbtech/ums/common/NetworkUitlity.java
index e48401dc..2912fbc6 100644
--- a/sdk/android_sdk/SDK/src/com/wbtech/ums/common/NetworkUitlity.java
+++ b/sdk/android_sdk/SDK/src/com/wbtech/ums/common/NetworkUitlity.java
@@ -1,109 +1,138 @@
-/**
- * Cobub Razor
- *
- * An open source analytics android sdk for mobile applications
- *
- * @package		Cobub Razor
- * @author		WBTECH Dev Team
- * @copyright	Copyright (c) 2011 - 2012, NanJing Western Bridge Co.,Ltd.
- * @license		http://www.cobub.com/products/cobub-razor/license
- * @link		http://www.cobub.com/products/cobub-razor/
- * @since		Version 0.1
- * @filesource
- */
-package com.wbtech.ums.common;
-
-import java.net.URLDecoder;
-
-import org.apache.http.HttpResponse;
-import org.apache.http.client.HttpClient;
-import org.apache.http.client.methods.HttpPost;
-import org.apache.http.entity.StringEntity;
-import org.apache.http.impl.client.DefaultHttpClient;
-import org.apache.http.protocol.HTTP;
-import org.apache.http.util.EntityUtils;
-import org.json.JSONException;
-import org.json.JSONObject;
-
-import android.util.Log;
-
-import com.wbtech.ums.objects.MyMessage;
-public class NetworkUitlity {
-	public static long paramleng = 256L;
-	public static String DEFAULT_CHARSET=" HTTP.UTF_8";
-	public static MyMessage post(String url, String data) {
-		// TODO Auto-generated method stub
-		CommonUtil.printLog("ums",url);
-		String returnContent = "";
-		MyMessage message=new MyMessage();
-		HttpClient httpclient = new DefaultHttpClient();
-		HttpPost httppost = new HttpPost(url);
-		try {
-			StringEntity se = new StringEntity("content="+data, HTTP.UTF_8);
-			CommonUtil.printLog("postdata", "content="+data);
-			se.setContentType("application/x-www-form-urlencoded");
-			httppost.setEntity(se);
-			HttpResponse response = httpclient.execute(httppost);
-			int status = response.getStatusLine().getStatusCode();
-			CommonUtil.printLog("ums",status+"");
-			String returnXML = EntityUtils.toString(response.getEntity());
-			returnContent = URLDecoder.decode(returnXML);
-			switch (status) {
-			case 200:
-				message.setFlag(true);
-				message.setMsg(returnContent);
-				break;
-				
-			default:
-				Log.e("error", status+returnContent);
-				message.setFlag(false);
-				message.setMsg(returnContent);
-				break;
-			}
-		} catch (Exception e) {	
-			JSONObject jsonObject = new JSONObject();
-			
-				try {
-					jsonObject.put("err", e.toString());
-					returnContent = jsonObject.toString();
-					message.setFlag(false);
-					message.setMsg(returnContent);
-				} catch (JSONException e1) {
-					e1.printStackTrace();
-				}
-				
-			
-		}
-		CommonUtil.printLog("UMSAGENT", message.getMsg());
-		return message;
-	}
-	
-	public static String Post(String url, String data) {
-
-        CommonUtil.printLog("ums",url);
-
-
-        HttpClient httpclient = new DefaultHttpClient();
-        HttpPost httppost = new HttpPost(url);
-        try {
-            StringEntity se = new StringEntity("content="+data, HTTP.UTF_8);
-            CommonUtil.printLog("postdata", "content="+data);
-            se.setContentType("application/x-www-form-urlencoded");
-            httppost.setEntity(se);
-            HttpResponse response = httpclient.execute(httppost);
-            int status = response.getStatusLine().getStatusCode();
-            CommonUtil.printLog("ums",status+"");
-            String returnXML = EntityUtils.toString(response.getEntity());
-            Log.d("returnString", URLDecoder.decode(returnXML));
-            return URLDecoder.decode(returnXML);
-            
-        } catch (Exception e) { 
-            CommonUtil.printLog("ums",e.toString());
-        }
-        return null;
-    }
-	
-	
-
-	
-}
+/**
+ * Cobub Razor
+ *
+ * An open source analytics android sdk for mobile applications
+ *
+ * @package		Cobub Razor
+ * @author		WBTECH Dev Team
+ * @copyright	Copyright (c) 2011 - 2012, NanJing Western Bridge Co.,Ltd.
+ * @license		http://www.cobub.com/products/cobub-razor/license
+ * @link		http://www.cobub.com/products/cobub-razor/
+ * @since		Version 0.1
+ * @filesource
+ */
+package com.wbtech.ums.common;
+
+import java.net.HttpURLConnection;
+import java.net.URL;
+import java.net.URLDecoder;
+import java.util.zip.GZIPOutputStream;
+
+import org.apache.http.HttpResponse;
+import org.apache.http.HttpStatus;
+import org.apache.http.client.HttpClient;
+import org.apache.http.client.methods.HttpPost;
+import org.apache.http.entity.StringEntity;
+import org.apache.http.impl.client.DefaultHttpClient;
+import org.apache.http.protocol.HTTP;
+import org.apache.http.util.EntityUtils;
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import android.util.Log;
+
+import com.wbtech.ums.objects.MyMessage;
+
+public class NetworkUitlity {
+	public static long paramleng = 256L;
+	public static String DEFAULT_CHARSET = " HTTP.UTF_8";
+
+	public static MyMessage post(String url, String data) {
+		// TODO Auto-generated method stub
+		CommonUtil.printLog("ums", url);
+		String returnContent = "";
+		MyMessage message = new MyMessage();
+		HttpClient httpclient = new DefaultHttpClient();
+		HttpPost httppost = new HttpPost(url);
+		try {
+			StringEntity se = new StringEntity("content=" + data, HTTP.UTF_8);
+			CommonUtil.printLog("postdata", "content=" + data);
+			se.setContentType("application/x-www-form-urlencoded");
+			httppost.setEntity(se);
+			HttpResponse response = httpclient.execute(httppost);
+			int status = response.getStatusLine().getStatusCode();
+			CommonUtil.printLog("ums", status + "");
+			String returnXML = EntityUtils.toString(response.getEntity());
+			returnContent = URLDecoder.decode(returnXML);
+			switch (status) {
+			case 200:
+				message.setFlag(true);
+				message.setMsg(returnContent);
+				break;
+
+			default:
+				Log.e("error", status + returnContent);
+				message.setFlag(false);
+				message.setMsg(returnContent);
+				break;
+			}
+		} catch (Exception e) {
+			JSONObject jsonObject = new JSONObject();
+
+			try {
+				jsonObject.put("err", e.toString());
+				returnContent = jsonObject.toString();
+				message.setFlag(false);
+				message.setMsg(returnContent);
+			} catch (JSONException e1) {
+				e1.printStackTrace();
+			}
+
+		}
+		CommonUtil.printLog("UMSAGENT", message.getMsg());
+		return message;
+	}
+
+	public static String Post(String url, String data) {
+
+		CommonUtil.printLog("ums", url);
+
+		HttpClient httpclient = new DefaultHttpClient();
+		HttpPost httppost = new HttpPost(url);
+		try {
+			StringEntity se = new StringEntity("content=" + data, HTTP.UTF_8);
+			CommonUtil.printLog("postdata", "content=" + data);
+			se.setContentType("application/x-www-form-urlencoded");
+			httppost.setEntity(se);
+			HttpResponse response = httpclient.execute(httppost);
+			int status = response.getStatusLine().getStatusCode();
+			CommonUtil.printLog("ums", status + "");
+			String returnXML = EntityUtils.toString(response.getEntity());
+			Log.d("returnString", URLDecoder.decode(returnXML));
+			return URLDecoder.decode(returnXML);
+
+		} catch (Exception e) {
+			CommonUtil.printLog("ums", e.toString());
+		}
+		return null;
+	}
+
+	/**
+	 * compress string use gzip to reduce the size
+	 * */
+	public static MyMessage postCompressed(String requestUrl, String data) {
+		MyMessage message = new MyMessage();
+		try {
+			URL url = new URL(requestUrl);
+			HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+			conn.setDoOutput(true);
+			conn.setRequestProperty("Content-encoding", "gzip");
+			conn.setRequestProperty("Content-type", "application/octet-stream");
+			GZIPOutputStream dos1 = new GZIPOutputStream(conn.getOutputStream());
+			dos1.write(data.getBytes("utf-8"));
+			dos1.flush();
+			dos1.close();
+			if (conn.getResponseCode() == HttpStatus.SC_OK) {
+				message.setFlag(true);
+			} else {
+				message.setFlag(false);
+				message.setMsg(conn.getResponseMessage());
+			}
+		} catch (Exception e) {
+			Log.e("dakele", e.getMessage(), e);
+		}
+		message.setFlag(false);
+		return message;
+	}
+
+}
diff --git a/sdk/android_sdk/SDK/src/com/wbtech/ums/controller/EventController.java b/sdk/android_sdk/SDK/src/com/wbtech/ums/controller/EventController.java
index 13753652..d07da863 100644
--- a/sdk/android_sdk/SDK/src/com/wbtech/ums/controller/EventController.java
+++ b/sdk/android_sdk/SDK/src/com/wbtech/ums/controller/EventController.java
@@ -1,6 +1,7 @@
-
 package com.wbtech.ums.controller;
 
+import org.json.JSONObject;
+
 import android.content.Context;
 import android.os.Handler;
 
@@ -12,42 +13,39 @@
 import com.wbtech.ums.objects.MyMessage;
 import com.wbtech.ums.objects.PostObjEvent;
 
-import org.json.JSONObject;
-
 public class EventController {
-    static final String EVENTURL = UmsConstants.preUrl + UmsConstants.eventUrl;
-    public static boolean postEventInfo(Handler handler, Context context, PostObjEvent event) {
-        try {
-            if (!event.verification())
-            {
-                CommonUtil.printLog("UMSAgent", "Illegal value of acc in postEventInfo");
-                return false;
-            }
-
-            JSONObject localJSONObject = AssembJSONObj.getEventJOSNobj( event);
-
-            if (1 == CommonUtil.getReportPolicyMode(context)
-                    && CommonUtil.isNetworkAvailable(context)) {
-                try {
-                    String reslut = NetworkUitlity.Post(EVENTURL, localJSONObject.toString());
-                    MyMessage info = JSONParser.parse(reslut);
-                    if (!info.isFlag()) {
-                        CommonUtil.saveInfoToFile(handler, "eventInfo", localJSONObject, context);
-                        return false;
-                    }
-                } catch (Exception e) {
-                    CommonUtil.printLog("UmsAgent", "fail to post eventContent");
-                }
-            } else {
-
-                CommonUtil.saveInfoToFile(handler, "eventInfo", localJSONObject, context);
-                return false;
-            }
-        } catch (Exception e) {
-            CommonUtil.printLog("UMSAgent", "Exception occurred in postEventInfo()");
-            e.printStackTrace();
-            return false;
-        }
-        return true;
-    }
+	static final String EVENTURL = UmsConstants.preUrl + UmsConstants.eventUrl;
+
+	public static boolean postEventInfo(Handler handler, Context context, PostObjEvent event) {
+		try {
+			if (!event.verification()) {
+				CommonUtil.printLog("UMSAgent", "Illegal value of acc in postEventInfo");
+				return false;
+			}
+
+			JSONObject localJSONObject = AssembJSONObj.getEventJOSNobj(event);
+
+			if (1 == CommonUtil.getReportPolicyMode(context) && CommonUtil.isNetworkAvailable(context)) {
+				try {
+					String reslut = NetworkUitlity.Post(EVENTURL, localJSONObject.toString());
+					MyMessage info = JSONParser.parse(reslut);
+					if (!info.isFlag()) {
+						CommonUtil.saveInfoToFile(handler, "eventInfo", localJSONObject, context);
+						return false;
+					}
+				} catch (Exception e) {
+					CommonUtil.printLog("UmsAgent", "fail to post eventContent");
+				}
+			} else {
+
+				CommonUtil.saveInfoToFile(handler, "eventInfo", localJSONObject, context);
+				return false;
+			}
+		} catch (Exception e) {
+			CommonUtil.printLog("UMSAgent", "Exception occurred in postEventInfo()");
+			e.printStackTrace();
+			return false;
+		}
+		return true;
+	}
 }