The first step is to open the Android Studio we downloaded and installed.

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Then we have chosen the project to publish, and choose Build.

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Then select the APK that generated the signature.

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You can then choose to create or select an existing key. I chose a previously created key file.

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Then enter the password and other information, and click Next.

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Then click finish and select the release version.

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We can see the generated apk file, and then we can publish the application to various platforms for download.