Install Android Studio
Install the Android SDK
Create a new project
Choose an app template
Set the app name
Set the package name
Select the language
Select the minimum SDK version
Design the user interface
Add app logic
Create activities or fragments
Define app navigation
Add required permissions
Test the app on an emulator
Test the app on a physical device
Fix errors and bugs
Optimize the app
Generate a signed APK or AAB
Publish the app on Google Play Store