(1. For the course of signature in Android - "Android Android Security (3) - four components of signature permission servicecontentproviderpolicyroot principle", please download all the contents of this video tutorial in the topic. Many other courses such as mass software development, function optimization, network development, etc. are updated by yourself. You can click my user name to check various resources I published. This material includes the following attachments:
1. Signature in Android - Android Security (3) - four components of signature permission servicecontentproviderpolicyroot principle - Geek Academy course - Geek Academy. mp4)