diff --git a/README.md b/README.md
index 8c02d13..8cf5988 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,14 @@
 # CrosswalkDemo
 A simple project showing how to embed Crosswalk into an Android application.
 
-You can run the project in Android Studio or create an APK with the following command:
+1、首先确认本机已安装Android sdk
+
+2、在项目根目录下创建local.properties文件，在文件中输入sdk的路径，例如：
+```
+sdk.dir = /Users/chenzhipei/Library/Android/sdk/
+```
+
+3、通过以下命令打包成apk：
 
 `./gradlew assembleRelease`
 
@@ -9,4 +16,4 @@ or
 
 `./gradlew assembleDebug
 
-More details here: [https://diego.org/2015/01/07/embedding-crosswalk-in-android-studio/](https://diego.org/2015/01/07/embedding-crosswalk-in-android-studio/)
\ No newline at end of file
+More details here: [https://diego.org/2015/01/07/embedding-crosswalk-in-android-studio/](https://diego.org/2015/01/07/embedding-crosswalk-in-android-studio/)