Recommendation

• For a modern, flexible, and future-proof keyboard:

  • Choose Jetpack Compose. Be prepared to invest time in learning Compose and addressing the lifecycle management challenges.

• For a simpler, more straightforward implementation:

  • Choose Kotlin XML. This is a good option if you're new to custom keyboards or prefer a more traditional approach.

  • If you have a very short deadline, then XML will likely be faster to implement.

Key Considerations

• Complexity of your keyboard: If you're planning a complex keyboard with dynamic layouts and animations, Compose is the better choice.

• Your experience: If you're comfortable with Compose, use it. If you're more familiar with XML, start with that.

• Long-term maintenance: Compose will be easier to maintain in the long run.

Ultimately, the best choice depends on your specific needs and preferences.