diff --git a/android/build.gradle b/android/build.gradle
index 32fa2ed..46295de 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -9,13 +9,12 @@ android {
         targetSdkVersion 23
         versionCode 1
         versionName "1.0"
-
-        ndk {
-            moduleName "rnupdate"
-            ldLibs "log"
-            abiFilters "armeabi-v7a", "x86"
+    }
+    sourceSets {
+        main {
+            // let gradle pack the shared library into apk
+            jniLibs.srcDirs = ['./lib']
         }
-
     }
 }
 
diff --git a/android/src/main/jni/DownloadTask.c b/android/jni/DownloadTask.c
similarity index 100%
rename from android/src/main/jni/DownloadTask.c
rename to android/jni/DownloadTask.c
diff --git a/android/src/main/jni/blocksort.c b/android/jni/blocksort.c
similarity index 100%
rename from android/src/main/jni/blocksort.c
rename to android/jni/blocksort.c
diff --git a/android/src/main/jni/bspatch.c b/android/jni/bspatch.c
similarity index 100%
rename from android/src/main/jni/bspatch.c
rename to android/jni/bspatch.c
diff --git a/android/src/main/jni/bspatch.h b/android/jni/bspatch.h
similarity index 100%
rename from android/src/main/jni/bspatch.h
rename to android/jni/bspatch.h
diff --git a/android/src/main/jni/bzlib.c b/android/jni/bzlib.c
similarity index 100%
rename from android/src/main/jni/bzlib.c
rename to android/jni/bzlib.c
diff --git a/android/src/main/jni/bzlib.h b/android/jni/bzlib.h
similarity index 100%
rename from android/src/main/jni/bzlib.h
rename to android/jni/bzlib.h
diff --git a/android/src/main/jni/bzlib_private.h b/android/jni/bzlib_private.h
similarity index 100%
rename from android/src/main/jni/bzlib_private.h
rename to android/jni/bzlib_private.h
diff --git a/android/src/main/jni/cn_reactnative_modules_update_DownloadTask.h b/android/jni/cn_reactnative_modules_update_DownloadTask.h
similarity index 100%
rename from android/src/main/jni/cn_reactnative_modules_update_DownloadTask.h
rename to android/jni/cn_reactnative_modules_update_DownloadTask.h
diff --git a/android/src/main/jni/compress.c b/android/jni/compress.c
similarity index 100%
rename from android/src/main/jni/compress.c
rename to android/jni/compress.c
diff --git a/android/src/main/jni/crctable.c b/android/jni/crctable.c
similarity index 100%
rename from android/src/main/jni/crctable.c
rename to android/jni/crctable.c
diff --git a/android/src/main/jni/decompress.c b/android/jni/decompress.c
similarity index 100%
rename from android/src/main/jni/decompress.c
rename to android/jni/decompress.c
diff --git a/android/src/main/jni/huffman.c b/android/jni/huffman.c
similarity index 100%
rename from android/src/main/jni/huffman.c
rename to android/jni/huffman.c
diff --git a/android/src/main/jni/randtable.c b/android/jni/randtable.c
similarity index 100%
rename from android/src/main/jni/randtable.c
rename to android/jni/randtable.c
diff --git a/android/lib/armeabi-v7a/librnupdate.so b/android/lib/armeabi-v7a/librnupdate.so
new file mode 100755
index 0000000..a423fbe
Binary files /dev/null and b/android/lib/armeabi-v7a/librnupdate.so differ
diff --git a/android/lib/x86/librnupdate.so b/android/lib/x86/librnupdate.so
new file mode 100755
index 0000000..5c683c4
Binary files /dev/null and b/android/lib/x86/librnupdate.so differ
diff --git a/docs/guide.md b/docs/guide.md
index b51f512..7c24a37 100644
--- a/docs/guide.md
+++ b/docs/guide.md
@@ -6,7 +6,7 @@
 
 所以我们也假设你已经拥有了开发React Native应用的一切环境，包括`Node.js`、`npm`、`XCode`、`Android SDK`等等。
 
-如果你之前没安装过，你还必须安装[Android NDK](http://androiddevtools.cn)，版本最好选用r10e，并设置环境变量`ANDROID_NDK_HOME`，指向你的NDK根目录(例如`/Users/tdzl2003/Downloads/android-ndk-r10e`)。
+如果React Native的版本是0.45以下，并且你之前没安装过，你还必须安装[Android NDK](http://androiddevtools.cn)，版本最好选用r10e，并设置环境变量`ANDROID_NDK_HOME`，指向你的NDK根目录(例如`/Users/tdzl2003/Downloads/android-ndk-r10e`)。0.46以上的React Native不需要这一步。
 
 ## 安装