@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (!active) {
return;
}
DownloadService downloadService = DownloadServiceImpl.getInstance();
if (downloadService != null && downloadService.getPlayerState() != PlayerState.STARTED) {
return;
}
if (data == null) {
return;
}
if (points == null || points.length < data.length * 4) {
points = new float[data.length * 4];
}
int w = getWidth();
int h = getHeight();
for (int i = 0; i < data.length - 1; i++) {
points[i * 4] = w * i / (data.length - 1);
points[i * 4 + 1] = h / 2 + ((byte) (data[i] + 128)) * (h / 2) / 128;
points[i * 4 + 2] = w * (i + 1) / (data.length - 1);
points[i * 4 + 3] = h / 2 + ((byte) (data[i + 1] + 128)) * (h / 2) / 128;
}
canvas.drawLines(points, paint);
}
private Visualizer getVizualiser() {
DownloadService downloadService = DownloadServiceImpl.getInstance();
VisualizerController visualizerController =
downloadService == null ? null : downloadService.getVisualizerController();
return visualizerController == null ? null : visualizerController.getVisualizer();
}