How to generate a Google Play upload key and keystore for a Flutter app in Android Studio?

To generate a Google Play upload key and keystore for a Flutter app in Android Studio, follow these steps:

1. Open a terminal window and navigate to the root directory of your Flutter project.
2. Run the following command to create a new keystore:

keytool -genkey -v -keystore ~/upload-keystore.jks -keyalg RSA -keysize 2048 -validity 10000 -alias upload

3. Enter a password for the keystore and confirm it.
4. You will be prompted to enter your first and last name, organizational unit, organization, city, state, and country code.
5. Once you have entered all the required information, the keystore will be created.
6. Next, you need to create a key for the keystore.
7. Run the following command to create a new key:

keytool -genkeypair -v -alias upload -keystore ~/upload-keystore.jks -keyalg RSA -keysize 2048 -validity 10000

8. Enter the same password you used to create the keystore.
9. You will be prompted to enter your first and last name, organizational unit, organization, city, state, and country code again.
10. Once you have entered all the required information, the key will be created.
11. Now you need to export the keystore as a base64-encoded string.
12. Run the following command to export the keystore:

keytool -exportcert -rfc -alias upload -keystore ~/upload-keystore.jks | base64

13. Copy the output of the command and save it in a safe place.
14. Finally, you need to upload the keystore to the Google Play Console.
15. Log in to the Google Play Console and go to the "Release management" page.
16. Click on the "App signing" tab and then click on the "Upload keystore" button.
17. Select the keystore file that you created earlier and click on the "Upload" button.
18. Once the keystore has been uploaded, you will be able to use it to sign your app for release.