Get APK basic info in Android

A packagemanager can get all the packet node information:
1, base class for all nodes: Packageiteminfo;
2,packageinfo:package's comprehensive information, consistent with all information in the Androidmanifest.xml;
3,applicationinfo: Associated application-specific information, consistent with the application node in the manifest;
4,activityinfo: Information associated with activity or receiver, consistent with the nodes in the list;
5,serviceinfo: The information associated with the service, consistent with the service node in the list;
6,providerinfo: Preservation of contentprovider information;
7,resolveinfo: Consistent with the intent node in the manifest, it can be used to obtain the component information on the intent layer.

Two get basic information about the apps installed on your phone:
1, obtained PackageInfo:pm.getInstalledPackages (packagemanager.get_uninstalled_packages);
2, Get package name: Packageinfo.packagename;
3, get version number: Packageinfo.versioncode;
4, obtain ApplicationInfo:packageInfo.applicationInfo;
5, get APK installation path: Applicationinfo.publicsourcedir;

Three get the APK signature file:
After obtaining the APK path, the ZipFile and ZipEntry APIs are available to get the APK's three signature files, and the names of the three files are: Meta-inf/manifest. MF, Meta-inf/cert. SF and Meta-inf/cert. Rsa.

Get APK basic info in Android