Signing Apk After Repackaging? Mới Update

After repackaging an APK file, you may need to sign it in order to install it on an Android device. Here are the steps to sign an APK after repackaging:

1. Obtain the necessary tools: You will need the Android SDK, which includes the keytool utility, and the jarsigner utility. These tools are included with Android Studio.

2. Generate a new signing key: If you do not already have a signing key, you will need to generate one using the keytool utility. Run the following command in a terminal or command prompt:

   vbnet
   keytool -genkey -v -keystore my-release-key.keystore -alias alias_name -keyalg RSA -keysize 2048 -validity 10000
   

   This command will generate a new keystore file called my-release-key.keystore and a new alias called alias_name. You will be prompted to enter a password and other information.

3. Sign the APK: Once you have a keystore file and alias, you can sign the APK using the jarsigner utility. Run the following command in a terminal or command prompt:

   perl
   jarsigner -verbose -sigalg SHA1withRSA -digestalg SHA1 -keystore my-release-key.keystore my-app.apk alias_name
   

   This command will sign the APK file my-app.apk with the key from the my-release-key.keystore file and the alias_name alias.

4. Verify the signature: After signing the APK, you can verify the signature using the jarsigner utility. Run the following command in a terminal or command prompt:

   perl
   jarsigner -verify -verbose -certs my-app.apk
   

   This command will print out information about the signed APK and verify that the signature is valid.

That’s it! You have now signed the APK file after repackaging. You can now install the APK on an Android device or distribute it to users.