Android application development is the process of creating mobile applications that run on the Android operating system. The process typically involves several stages, including:

Planning: This is where you define the goals and requirements for the app, as well as its intended target audience. You may also conduct market research to identify potential competitors or opportunities.

Design: In this stage, you will create wireframes, mockups, and prototypes to visualize the user interface and user experience of the app. You will also design the app's visual elements, such as icons, images, and color schemes.

Development: This is the stage where the actual coding and programming take place. You'll need to choose a programming language, such as Java or Kotlin, and develop the app's logic and functionality. You may also need to integrate third-party libraries, APIs, and SDKs.

Testing: In this stage, you'll test the app to make sure it is working as intended and is free from bugs, errors, and crashes. You may conduct manual or automated testing, as well as usability testing with real users.