Android Android’s software installation package has a file extension of .apk, and its file format is a standard .zip file, which can be opened directly through compression tools such as WinZIP and WinRAR, or in the .apk file name By adding the .zip suffix to the file, you can view the specific file contents encapsulated in it, including programs, pictures, configuration files, etc.

Different from standard .zip files, Android Android's .apk software installation package also comes with two key identification information: package name and signature. The package name is used to identify the software itself to provide installation replacement and version upgrade prompts; the signature is used to identify the developer to determine whether the software package has been modified.

Android software installation packages downloaded through web pages or forums are sometimes automatically renamed with a .zip extension. In this case, you need to directly rename the Android software installation package with a .zip extension to .apk. , so that it can be installed into the Android device normally.