Is there a way to retrieve the signature of the key used to sign an APK? I signed my APK with my key from my keystore. How can I retrieve it programmatically?
All applications must be signed. The system will not install an application on an emulator or a device if it is not signed. To test and debug your application, the build tools sign your application with a special debug key that is created by the Android SDK build tools.
You can access the APK's signing signature like this using the PackageManager class http://developer.android.com/reference/android/content/pm/PackageManager.html
Signature[] sigs = context.getPackageManager().getPackageInfo(context.getPackageName(), PackageManager.GET_SIGNATURES).signatures; for (Signature sig : sigs) { Trace.i("MyApp", "Signature hashcode : " + sig.hashCode()); }
I've used this to compare with the hashcode for my debug key, as a way to identify whether the APK is a debug APK or a release APK.
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