Android Question error private sign key


Licensed User
I'm new member of this forum, i've the same problem, i can't release with obfuscated my app.
I have jdk 1.8.0_161 and my error is:
B4A Versione: 7.80
Analisi del Codice. (0.02s)
Compilazione del codice. (0.15s)

File ObsucastorMap.txt creato nella cartella Objects.
Compilazione del codice di layouts (0.04s)
Organizzazione Librerie. (0.00s)
Generazione file R. (0.50s)
Compilazione del codice Java prodotto. (2.15s)
Conversione byte code - ottimizzazione dex. (0.78s)
Packaging files. (1.18s)
Copia risorse delle librerie (0.00s)
Firmo il package file ( chiave privata ). Error
jarsigner error: The security strength of SHA-1 digest algorithm is not sufficient for this key size
i try to release with obfuscated my app with debug key, and release it
p.s. Sorry for my english.

Thank you


Licensed User
Longtime User
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Licensed User
i switch to ver. 8 and i create my app, i solved it..
thank you soo much

p.s. why i needed a android simulator or phone to release a app with b4a??
Last edited:
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