The sub-application (or plug-in) mentioned here is also an independent APK, but it cannot exist out of the main application, that is
If you download and install a sub-application, there is no use value, but it only occupies the space of the mobile phone.
1. Although it has its own independent icon, it cannot appear under the Application List
2. After the installation is complete, click open. You need to do the following:
1) check whether the master application is installed
A) Check the version number of the main application if it has been installed, because some plug-ins are added only after a specific version.
- A) if the version is greater than or equal to a specific version, you can open the main page or corresponding page of the main application.
- B) if the version is earlier than a specific version, the user should be guided to download the master application of a newer version.
B) if not installed, instruct the user to download the main application.