Java to obtain the signature summary of APK installed on the mobile phone

When publishing APK to the app store or accessing the SDK of a third party, you sometimes need to provide APK signature summary information. You can obtain the signature summary through the summary algorithm MD5 or SHA-1. In addition to obtaining your own APK signature, you can also obtain other installed APK signatures on the mobile phone. You only need to pass in the package name of other apks.

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