您需要修改清单文件，这两个应用程序，添加相同的机器人：sharedUserId元素，既体现节点。

You need to modify manifest files for both apps, add the same 'android:sharedUserId' element to both manifest nodes.

例如。

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
  android:sharedUserId="com.mycompany.myapp" .... />

如果这两个应用程序具有相同的sharedUserId，他们可以互相访问的数据文件夹。

If both apps have the same sharedUserId, they can access each other's data folders.

忘了补充：很明显，你需要登录这两个应用程序与相同的别名相同的私钥

Forgot to add: obviously you need to sign both apps with the same private key with the same alias.