diff --git a/jni/Android.mk b/jni/Android.mk
index 1129342..f7d4965 100644
--- a/jni/Android.mk
+++ b/jni/Android.mk
@@ -41,14 +41,20 @@ else
     ARCH := arm
 endif
 
+NDK_WHICH := $(shell test -f $(shell dirname $(shell which ndk-which))/ndk-which && echo yes)
+
 v8basepath := $(LOCAL_PATH)/v8core/v8
 v8libpath := $(v8basepath)/out/android_$(ARCH).release//obj.target/tools/gyp/
 v8libs := $(v8libpath)/libv8_base.a $(v8libpath)/libpreparser_lib.a $(v8libpath)/libv8_nosnapshot.a
 
 $(v8libs): MY_ARCH_ABI := $(TARGET_ARCH_ABI)
-
+	
 $(v8libs):
-	cd $(v8basepath) && TARGET_ARCH=$(MY_ARCH_ABI) ./build.sh
+    ifeq ($(NDK_WHICH), yes)
+	  cd "$(v8basepath)" && TARGET_ARCH="$(MY_ARCH_ABI)" TOOLCHAIN_PATH="$(shell dirname $(shell (ndk-which --abi $(TARGET_ARCH) objdump)))" ./build.sh
+    else 
+	  cd "$(v8basepath)" && TARGET_ARCH="$(MY_ARCH_ABI)" ./build.sh
+    endif
 
 $(TARGET_OUT)/libweexv8.so: $(v8libs)
 
diff --git a/jni/Application.mk b/jni/Application.mk
index 9c1c6c7..f20eba1 100644
--- a/jni/Application.mk
+++ b/jni/Application.mk
@@ -1,4 +1,4 @@
-APP_ABI := armeabi x86
-APP_PLATFORM := android-9
+APP_ABI := armeabi-v7a x86
+APP_PLATFORM := android-16
 #LOCAL_CPP_FEATURES += exceptions
 #APP_CPPFLAGS := -frtti -fexceptions 
diff --git a/jni/v8core/com_taobao_weex_bridge_WXBridge.cpp b/jni/v8core/com_taobao_weex_bridge_WXBridge.cpp
index 08d7df6..bd68a42 100644
--- a/jni/v8core/com_taobao_weex_bridge_WXBridge.cpp
+++ b/jni/v8core/com_taobao_weex_bridge_WXBridge.cpp
@@ -5,6 +5,7 @@
 #include <v8.h>
 #include <assert.h>
 #include <fcntl.h>
+#include <string.h>
 
 
 jclass jBridgeClazz;
diff --git a/jni/v8core/v8/build.sh b/jni/v8core/v8/build.sh
index 2be9e41..8fda2b3 100755
--- a/jni/v8core/v8/build.sh
+++ b/jni/v8core/v8/build.sh
@@ -13,12 +13,18 @@ fi
 # If not defined ANDROID_TOOLCHAIN, it search the ndk directory and find the gcc-4.4.3 to compile v8.
 if [ -z "$ANDROID_TOOLCHAIN" ]; then
     if [ "$TARGET_ARCH" = "x86" ]; then
-        TOOLCHAIN_PATH=`dirname $(find $NDK_ROOT/toolchains $NDK_ROOT/build  -name 'i686*' -name '*-g++' | sort -r | head -n 1)`
+        if [ -z "$TOOLCHAIN_PATH" ]; then
+		    TOOLCHAIN_PATH=`dirname $(find $NDK_ROOT/toolchains $NDK_ROOT/build  -name 'i686*' -name '*-g++' | sort -r | head -n 1)`
+        fi
     elif [ "$TARGET_ARCH" = "armeabi" ]; then
-        TOOLCHAIN_PATH=`dirname $(find $NDK_ROOT/toolchains $NDK_ROOT/build  -name 'arm*' -name '*-g++' | sort  -r| head -n 1)`
+        if [ -z "$TOOLCHAIN_PATH" ]; then
+		    TOOLCHAIN_PATH=`dirname $(find $NDK_ROOT/toolchains $NDK_ROOT/build  -name 'arm*' -name '*-g++' | sort  -r| head -n 1)`
+        fi
         EXTRA_OPTION="armv7=false vfp2=off vfp3=off"
     elif [ "$TARGET_ARCH" = "armeabi-v7a" ]; then
-        TOOLCHAIN_PATH=`dirname $(find $NDK_ROOT/toolchains $NDK_ROOT/build  -name 'arm*' -name '*-g++' | sort  -r| head -n 1)`
+        if [ -z "$TOOLCHAIN_PATH" ]; then		
+            TOOLCHAIN_PATH=`dirname $(find $NDK_ROOT/toolchains $NDK_ROOT/build  -name 'arm*' -name '*-g++' | sort  -r| head -n 1)`
+        fi
         EXTRA_OPTION="armv7=true vfp2=on vfp3=on"
     else
         echo "unsupported platform " "$TARGET_ARCH" 1>&2