[Android] Manifest File Info: PackageManager

1. Docs
   
   • http://developer.android.com/guide/topics/manifest/manifest-intro.html
   • http://developer.android.com/reference/android/content/pm/package-summary.html
     
2. Summary
   Access information about an application package, including information about its activities, permissions, services, signatures, and providers. Most of the information about an application package is defined by its manifest file. For more information, see the AndroidManifest.xml File documentation.
3. Important classes
   
   • PackageInfo
   • ApplicationInfo
     
     • nativeLibraryDir
     • processName
     • uid
   • InstrumentationInfo
   • ActivityInfo
   • ServiceInfo
   • ProviderInfo
   • FeatureInfo
   • PermissionInfo
   • PermissionGroupInfo
   • ResolveInfo: Determine the best component for a given Intent.
        resolveService/resolveActivity
   • Common info, such as
     
     • dataDir/publicSourceDir/sourceDir
     • removePermission/addPermission/addPermissionAsync/checkPermission
     • getNameForUid/getPackagesForUid
     • checkSignatures
   • xxx
     
4. xxx