diff --git a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/build.gradle b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/build.gradle
index 05222f84..0176cd4f 100644
--- a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/build.gradle
+++ b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/build.gradle
@@ -3,7 +3,7 @@ apply plugin: 'com.android.library'
 apply plugin: 'com.github.dcendents.android-maven'
 apply plugin: 'com.jfrog.bintray'
 
-version = "1.6.19"
+version = "1.6.20"
 
 android {
     compileSdkVersion 21
diff --git a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/SensorsDataAPI.java b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/SensorsDataAPI.java
index b0de1661..a6a758c3 100644
--- a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/SensorsDataAPI.java
+++ b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/SensorsDataAPI.java
@@ -429,6 +429,7 @@ public void enableAutoTrack() {
      * @param isSupportJellyBean 是否支持API level 16及以下的版本。
      * 因为API level 16及以下的版本, addJavascriptInterface有安全漏洞,请谨慎使用
      */
+    @Deprecated
     @SuppressLint(value = {"SetJavaScriptEnabled", "addJavascriptInterface"})
     public void showUpWebView(WebView webView, boolean isSupportJellyBean) {
         showUpWebView(webView, isSupportJellyBean, null);
@@ -1254,18 +1255,17 @@ public void onActivityStopped(Activity activity) {
             synchronized (startedActivityCount) {
                 startedActivityCount = startedActivityCount - 1;
 
-                if (mAutoTrack) {
-                    if (startedActivityCount == 0) {
+                if (startedActivityCount == 0) {
+                    if (mAutoTrack) {
                         try {
                             track("$AppEnd");
                         } catch (Exception e) {
                             Log.w(LOGTAG, e);
                         }
                     }
+                    mMessages.flush();
                 }
             }
-
-            mMessages.flush();
         }
 
         @Override
@@ -1404,7 +1404,7 @@ private static void mergeJSONObject(final JSONObject source, JSONObject dest)
     static final int VTRACK_SUPPORTED_MIN_API = 16;
 
     // SDK版本
-    static final String VERSION = "1.6.19";
+    static final String VERSION = "1.6.20";
 
     static Boolean ENABLE_LOG = false;
 
diff --git a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/util/SensorsDataUtils.java b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/util/SensorsDataUtils.java
index 790c9d88..db06b483 100644
--- a/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/util/SensorsDataUtils.java
+++ b/SensorsAnalyticsSDK/SensorsAnalyticsSDK/src/main/java/com/sensorsdata/analytics/android/sdk/util/SensorsDataUtils.java
@@ -73,6 +73,8 @@ public static String networkType(Context context) {
             case TelephonyManager.NETWORK_TYPE_GPRS:
             case TelephonyManager.NETWORK_TYPE_EDGE:
             case TelephonyManager.NETWORK_TYPE_CDMA:
+            case TelephonyManager.NETWORK_TYPE_1xRTT:
+            case TelephonyManager.NETWORK_TYPE_IDEN:
                 return "2G";
             case TelephonyManager.NETWORK_TYPE_UMTS:
             case TelephonyManager.NETWORK_TYPE_EVDO_0: