IssueTracker

When the user is in touch mode, and they hit Tab/Shift+Tab/Up/Down/Left/Right, The framework always calls requestFocus(null, FOCUS_DOWN).

Instead of DOWN, it should use the appropriate direction:
FOCUS_FORWARD/FOCUS_BACKWARD/FOCUS_UP/FOCUS_DOWN/FOCUS_LEFT/FOCUS_RIGHT


Sample:

class MainActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(
            CustomView(this).apply{
                isFocusable = true
                isFocusableInTouchMode = false
                addView(
                    TextView(this@MainActivity).apply {
                        text = """
                            Press Tab/Shift+Tab/Up/Down/Left/Right to request focus
                            Click anywhere to release focus
                        """.trimIndent()
                    }
                )
            }
        )
    }
}

class CustomView(context: Context) : LinearLayout(context) {
    override fun requestFocus(direction: Int, previouslyFocusedRect: Rect?): Boolean {
        val focusDirection = when(direction) {
            FOCUS_FORWARD -> "Focus Forward"
            FOCUS_BACKWARD -> "Focus Backward"
            FOCUS_UP -> "Focus Up"
            FOCUS_DOWN -> "Focus Down"
            FOCUS_LEFT -> "Focus Left"
            FOCUS_RIGHT -> "Focus Right"
            else -> "Unknown"
        }
        println("request focus called with $focusDirection")
        return super.requestFocus(direction, previouslyFocusedRect)
    }
}