The meaning of the signature
1. to ensure that every application developer is legally
2. prevent some malicious tampering by using the same package Name to confuse the replacement of an already installed program.
3. ensure consistency of our release version (e.g. Automatic Updates will not be installed because of inconsistent versions)
Here's a look at the specific steps of signing:
1. Right click on the project to select Export, pop up the following window
2. Select Export Android application, then click Next, select the project that needs to be exported, then in the next step
If there is a signature file select Use exiting KeyStore if no signature file select Create New KeyStore
Then select the location and password of the signature file and determine the password
Then click Next, fill in the corresponding name, password, organization name and other information
Then click Next to select the directory to generate the APK
Finally click Finish.
Signature packaging for Android apps