It's necessary to register for a Google Developer account in order to upload Android apps. Your Developer account is where you'll submit as well as manage your apps, and it costs a one-time fee of $25 to join the program.
We recommend setting up a second Google account for this purpose, so you can separate it from your other Google services (Gmail, Google+, etc.) if you already have a personal account.
1. Register for an Android Developer account here. You'll need to log into the Google account you'd like to use.
2. You'll be taken through a 4-step registration process now. First, check the agreement box and click "Continue to payment."
3. Next, a pop-up window will prompt you to input your billing info. After you've filled it out, click Accept and continue to confirm.
4. Finally, complete your account info. You should receive a confirmation email after you've finished!