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Add live final-position feedback and fix step detection accuracy

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Shows a live banner as each step of the approach is counted, ending in
"FINAL POSITION - RELEASE!" once the 5th footfall lands. Also fixes
LiveStepDetector's peak-prominence check, which compared a candidate
footfall only to its immediate neighboring frame and silently dropped
real steps that landed across several closely-spaced frames; it now
tracks the true rise/fall trough on each side instead. Switches
PoseAnalyzer to ML Kit's faster base pose model (the accurate model was
starving the peak detector of frames on unaccelerated hardware), and
makes LiveStepDetector's stillness-based reset toggleable, currently
off for easier testing against recorded reference clips.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
midnight-masala
2026-09-07 20:58:03 +08:00
co-authored by Claude Sonnet 5
parent afb9d800ff
commit 2bb7c6ca7b
10 changed files with 212 additions and 42 deletions
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app/src/main/java/com/example/jnicpp/bowling/BowlingCameraActivity.kt
+37
View File
@@ -14,6 +14,7 @@ import androidx.activity.result.contract.ActivityResultContracts
import androidx.activity.viewModels
import androidx.appcompat.app.AppCompatActivity
import androidx.camera.core.CameraSelector
import androidx.core.content.ContextCompat
import androidx.lifecycle.Lifecycle
import androidx.lifecycle.lifecycleScope
import androidx.lifecycle.repeatOnLifecycle
@@ -42,6 +43,14 @@ class BowlingCameraActivity : AppCompatActivity(), CameraXController.Callback {
companion object {
private const val TAG = "BowlingCameraActivity"
// This app is built around a 5-step approach: the bowler is in
// their "final position" (planted/sliding, about to swing through
// and release) the moment the 5th foot-plant of the current attempt
// is detected. Step counting itself is LiveStepDetector's job (via
// CameraViewModel.stepEvents) -- this just interprets that count for
// the live banner below.
private const val FINAL_STEP_COUNT = 5
}
private lateinit var binding: ActivityBowlingCameraBinding
@@ -182,6 +191,34 @@ class BowlingCameraActivity : AppCompatActivity(), CameraXController.Callback {
if (events.isNotEmpty()) {
Log.d(TAG, "Step ${events.size}: ${events.last()}")
}
// stepEvents is cleared back to empty on every reset
// (new recording, or LiveStepDetector seeing the
// bowler return to a stationary stance -- see
// CameraViewModel.onPoseFrameUpdated), so this banner
// naturally clears itself for the next attempt too.
//
// Shows every step as it's counted (not just the
// final one) so it's obvious on screen whether
// detection is actually seeing each footfall while
// testing/tuning it, rather than only finding out at
// step 5 that earlier steps were silently missed.
if (events.isEmpty()) {
binding.textFinalPosition.visibility = View.GONE
} else {
val reachedFinal = events.size >= FINAL_STEP_COUNT
binding.textFinalPosition.visibility = View.VISIBLE
binding.textFinalPosition.text = if (reachedFinal) {
getString(R.string.final_position_reached)
} else {
getString(R.string.step_reached_format, events.size)
}
binding.textFinalPosition.setTextColor(
ContextCompat.getColor(
this@BowlingCameraActivity,
if (reachedFinal) R.color.final_position_highlight else R.color.white
)
)
}
}
}
}