An Android developer is responsible for:

Mainly developing applications for devices supplied by the Android operating system. Ensuring that an application is nonconflicting with multiple Android versions and devices. Designing and creating refined applications compatible to the Android channel. Collaborating with a team of Android developers in designing and innovating prospect features. Working within outside data sources and API’s. Generate unit-test which would ensure the over-all reliability and usage of codes. Make use of improvement methods like bug fixing for the betterment of the application performance. Constantly evaluating, maintaining, improving, and adapting new technologies available to ensure maximum use of applications.