Add Wechat SDK jar libammsdk.jar.
SDK version can be found in Build.class as:
	com.tencent.mm.sdk.constants.Build.SDK_INT = 570490883;
	com.tencent.mm.sdk.constants.Build.SDK_VERSION_NAME = "android 2.1.3";
After add the .jar, the project run successfully as expected.
Add a blank DemoApplication and it works fine.
Mack it multiDex To avoid DEX’s 64k limit. See section <i>Using the official solution</i> in https://medium.com/@mustafa01ali/dexs-64k-limit-is-not-a-problem-anymore-well-almost-2b1faac3508
Then got the error after Run button clicked:
Error:Execution failed for task ':app:shrinkDebugMultiDexComponents'.
> java.io.IOException: Can't read [/Volumes/Disk2/Users/fabin/Documents/workspace-git/WechatSDK-Demo/app/build/intermediates/multi-dex/debug/allclasses.jar] (Can't process class [com/tencent/wxop/stat/al.class] (Unknown verification type [95] in stack map frame))