Android compose kotlin solid Algorithm jetpack compose ViewModel Livedata Fragment Room Sorting Property GEMINI Reflection Java Recomposition OGP PointerInput tensorflow lite SharedFlow companion object coroutineScope CameraX Hilt Configuration change datastore single responsibility Primitive BACKING TextView dynamic programming Jetpack DIP SRP greedy Divide and Conquer LSP zoom annotation View JNI paging Backtracking Field OCP key Gesture error isp