For help developing Android apps, visit the Android Developers site to find technical documentation, the Android SDK (software development kit), and tips for distributing your apps.
If you're a game developer, visit the Google Developers site for Google Play games services documentation.
Downloading apps and using Google Play
If you or your users are having problems downloading apps on Google Play, visit the Google Play Help Center to find troubleshooting information or contact customer support.
You can also read these helpful links:
Go to theDeveloper resources
Below are essential guides that every developer should be familiar with:
Design Develop Distribute