What I have done, is used the following code to get the signature. I
found the signature by doing a signed release build, with the
System.out.println line on, and copied it from Logcat. Then in actual
production builds I just comment it out.
PackageManager pm = getPackageManager();
try {
PackageInfo info =
pm.getPackageInfo("com.example.app",
PackageManager.GET_SIGNATURES);
Signature[] sig = info.signatures;
String sigstring = new String(sig[0].toChars());
//Do something with signature.
//System.out.println(sigstring);
} catch (NameNotFoundException e) {
e.printStackTrace();
}
On Oct 6, 3:44 pm, DanH <[email protected]> wrote:
> Supposedly PackageInfo.signatures[0] gives you the signature.
> However, there's a Catch22: You can't get the signature until the app
> is packaged, and you can't modify the app to insert the signature
> after it's been packaged.
>
> It would be better if one could get the public key used to sign the
> package, but that's apparently not accessible.
>
> On Oct 6, 5:21 pm, "Raymond C. Rodgers" <[email protected]>
> wrote:
>
>
>
>
>
>
>
> > Until now, I haven't really concerned myself with app piracy; I only
> > have one app under my belt for Android, it's in beta and it's free. I'm
> > about to start development on another app and looking to use ProGuard
> > for obfuscation and LVL as I would like to make it a paid app, and I've
> > been wondering something ever since the news that LVL had been
> > circumvented months ago. Is it possible to check the .apk's signature
> > from within the API? If not currently, perhaps Google might add some
> > code to Android itself or to the API to enable LVL to make sure that the
> > .apk signature matches the signature that Android Market already has on
> > file?
>
> > Just a thought, not even necessarily a feasible one.
> > Raymond
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