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perf(scanner): stop redoing everything on every advertisement, plus map point events

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Yes, the scanner was duplicating. refreshCategoryOptions(),
updateRadar() and pairedAdapter.notifyDataSetChanged() ran from
acceptSignal on every advertisement AND from pruneTask once a second
- the same three calls either way.

Worse, the whole persist path ran per advertisement, and ScanCallback
is delivered on the main looper: a hex dump of the advertisement,
lookupCompany(), get(), lookupOui(), then telemetry(),
setDetectedCategory(), recordObservation() and setVendor(). Eight
database operations on the UI thread per beacon, at
SCAN_MODE_LOW_LATENCY, times every transmitter in range. The radar
sweep re-posts itself every 33ms and was competing for that thread,
which is why it dragged.

A device already on the radar now only gets its RSSI and last-seen
stamp refreshed until PERSIST_INTERVAL_MS (3s) is up. A device's
first sighting still takes the full path and refreshes at once.

The radar view also allocated per frame at 30fps: a six-stop
RadialGradient plus two arrays, and a fresh ArrayList and Comparator
for the target sort. Both reused now. setTargets no longer
invalidates while scanning, since onDraw already re-posts itself.
Left setLayerType(SOFTWARE) alone - setShadowLayer only works on text
under hardware acceleration, so removing it would drop the ring glow.

Separately, history points now say why they exist. location_history
had no event column, so schema 16 adds one; connected() and
disconnected() stamp it and a plain position refresh leaves it null.
The popup shows a linked or broken-link line for the two states and
stays quiet for older rows that predate the column.

History points also render as the device's own marker at half size
rather than a plain circle, sharing one divIcon per device so a long
trail does not build a DOM node per point.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
This commit is contained in:
n0tst3v3
2026-08-19 10:27:15 -06:00
co-authored by Claude Opus 5
parent 0f01b836c6
commit f16efce66e
5 changed files with 170 additions and 50 deletions
Download Patch File Download Diff File Expand all files Collapse all files
app/src/main/java/com/wytehat/btlogger/BluetoothRadarView.java
+30 -12
View File
@@ -39,6 +39,18 @@ public class BluetoothRadarView extends View {
private float zoom = 1.0f;
private boolean suppressTap;
private double sweepAngle = -90.0;
/* Draw-time scratch, reused every frame -- see onDraw. */
private android.graphics.RadialGradient glow;
private float glowCx = -1f, glowCy = -1f, glowR = -1f;
private final ArrayList<Target> ordered = new ArrayList<Target>();
private final Comparator<Target> byAngle = new Comparator<Target>() {
public int compare(Target first, Target second) {
float a = angleFor(first.address);
float b = angleFor(second.address);
return a < b ? -1 : (a > b ? 1 : 0);
}
};
public BluetoothRadarView(Context context) {
super(context);
scaleDetector = new ScaleGestureDetector(context, new ScaleGestureDetector.SimpleOnScaleGestureListener() {
@@ -68,7 +80,10 @@ public class BluetoothRadarView extends View {
if (!targetAngles.containsKey(target.address))
targetAngles.put(target.address, Float.valueOf(findOpenAngle(target.address)));
}
targets.clear(); targets.addAll(values); invalidate();
targets.clear(); targets.addAll(values);
// While scanning, onDraw already re-posts itself every 33ms; an
// extra invalidate per update just forces redundant frames.
if (!scanning) invalidate();
}
protected synchronized void onDraw(Canvas canvas) {
@@ -81,9 +96,15 @@ public class BluetoothRadarView extends View {
float glowRadius = radius + 34f;
float edgeStop = radius / glowRadius;
paint.setStyle(Paint.Style.FILL);
paint.setShader(new android.graphics.RadialGradient(cx, cy, glowRadius,
new int[] { Color.TRANSPARENT, Color.argb(5, 35, 180, 110), Color.argb(24, 45, 225, 140), Color.argb(48, 55, 235, 150), Color.argb(18, 35, 190, 120), Color.TRANSPARENT },
new float[] { 0f, 0.55f, edgeStop - 0.05f, edgeStop, edgeStop + 0.10f, 1f }, android.graphics.Shader.TileMode.CLAMP));
// Rebuilt only when the geometry moves. This used to allocate a
// six-stop gradient and two arrays on every frame of a 30fps sweep.
if (glow == null || glowCx != cx || glowCy != cy || glowR != glowRadius) {
glow = new android.graphics.RadialGradient(cx, cy, glowRadius,
new int[] { Color.TRANSPARENT, Color.argb(5, 35, 180, 110), Color.argb(24, 45, 225, 140), Color.argb(48, 55, 235, 150), Color.argb(18, 35, 190, 120), Color.TRANSPARENT },
new float[] { 0f, 0.55f, edgeStop - 0.05f, edgeStop, edgeStop + 0.10f, 1f }, android.graphics.Shader.TileMode.CLAMP);
glowCx = cx; glowCy = cy; glowR = glowRadius;
}
paint.setShader(glow);
canvas.drawCircle(cx, cy, glowRadius, paint);
paint.setShader(null);
paint.setStyle(Paint.Style.STROKE);
@@ -123,14 +144,11 @@ public class BluetoothRadarView extends View {
paint.setTextAlign(Paint.Align.CENTER);
paint.setTextSize(12 * getResources().getDisplayMetrics().scaledDensity);
canvas.drawText("YOU", cx, cy + 24, paint);
ArrayList<Target> ordered = new ArrayList<Target>(targets);
Collections.sort(ordered, new Comparator<Target>() {
public int compare(Target first, Target second) {
float a = angleFor(first.address);
float b = angleFor(second.address);
return a < b ? -1 : (a > b ? 1 : 0);
}
});
// Reused across frames; a fresh list and comparator per frame is
// pure garbage at 30fps.
ordered.clear();
ordered.addAll(targets);
Collections.sort(ordered, byAngle);
float density = getResources().getDisplayMetrics().scaledDensity;
for (int i = 0; i < ordered.size(); i++) {
Target target = ordered.get(i);