Example usage for android.location GnssMeasurementsEvent getMeasurements

Introduction

In this page you can find the example usage for android.location GnssMeasurementsEvent getMeasurements.

Prototype

@NonNull
public Collection<GnssMeasurement> getMeasurements() 

Source Link

Document

Gets a read-only collection of measurements associated with the current event.

Usage

From source file:com.google.android.apps.location.gps.gnsslogger.FileLogger.java

@Override
public void onGnssMeasurementsReceived(GnssMeasurementsEvent event) {
    synchronized (mFileLock) {
        if (mFileWriter == null) {
            return;
        }//from  w ww  .  j  av  a  2s .c  o m
        GnssClock gnssClock = event.getClock();
        for (GnssMeasurement measurement : event.getMeasurements()) {
            try {
                writeGnssMeasurementToFile(gnssClock, measurement);
            } catch (IOException e) {
                logException(ERROR_WRITING_FILE, e);
            }
        }
    }
}

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From source file:com.google.android.apps.location.gps.gnsslogger.PlotFragment.java

/**
 *  Updates the CN0 versus Time plot data from a {@link GnssMeasurement}
 */// w w  w .  j  a va2 s. co m
protected void updateCnoTab(GnssMeasurementsEvent event) {
    long timeInSeconds = TimeUnit.NANOSECONDS.toSeconds(event.getClock().getTimeNanos());
    if (mInitialTimeSeconds < 0) {
        mInitialTimeSeconds = timeInSeconds;
    }

    // Building the texts message in analysis text view
    List<GnssMeasurement> measurements = sortByCarrierToNoiseRatio(new ArrayList<>(event.getMeasurements()));
    SpannableStringBuilder builder = new SpannableStringBuilder();
    double currentAverage = 0;
    if (measurements.size() >= NUMBER_OF_STRONGEST_SATELLITES) {
        mAverageCn0 = (mAverageCn0 * mMeasurementCount
                + (measurements.get(0).getCn0DbHz() + measurements.get(1).getCn0DbHz()
                        + measurements.get(2).getCn0DbHz() + measurements.get(3).getCn0DbHz())
                        / NUMBER_OF_STRONGEST_SATELLITES)
                / (++mMeasurementCount);
        currentAverage = (measurements.get(0).getCn0DbHz() + measurements.get(1).getCn0DbHz()
                + measurements.get(2).getCn0DbHz() + measurements.get(3).getCn0DbHz())
                / NUMBER_OF_STRONGEST_SATELLITES;
    }
    builder.append(getString(R.string.history_average_hint, sDataFormat.format(mAverageCn0) + "\n"));
    builder.append(getString(R.string.current_average_hint, sDataFormat.format(currentAverage) + "\n"));
    for (int i = 0; i < NUMBER_OF_STRONGEST_SATELLITES && i < measurements.size(); i++) {
        int start = builder.length();
        builder.append(mDataSetManager.getConstellationPrefix(measurements.get(i).getConstellationType())
                + measurements.get(i).getSvid() + ": " + sDataFormat.format(measurements.get(i).getCn0DbHz())
                + "\n");
        int end = builder.length();
        builder.setSpan(
                new ForegroundColorSpan(mColorMap.getColor(measurements.get(i).getSvid(),
                        measurements.get(i).getConstellationType())),
                start, end, Spannable.SPAN_INCLUSIVE_EXCLUSIVE);
    }
    builder.append(getString(R.string.satellite_number_sum_hint, measurements.size()));
    mAnalysisView.setText(builder);

    // Adding incoming data into Dataset
    mLastTimeReceivedSeconds = timeInSeconds - mInitialTimeSeconds;
    for (GnssMeasurement measurement : measurements) {
        int constellationType = measurement.getConstellationType();
        int svID = measurement.getSvid();
        if (constellationType != GnssStatus.CONSTELLATION_UNKNOWN) {
            mDataSetManager.addValue(CN0_TAB, constellationType, svID, mLastTimeReceivedSeconds,
                    measurement.getCn0DbHz());
        }
    }

    mDataSetManager.fillInDiscontinuity(CN0_TAB, mLastTimeReceivedSeconds);

    // Checks if the plot has reached the end of frame and resize
    if (mLastTimeReceivedSeconds > mCurrentRenderer.getXAxisMax()) {
        mCurrentRenderer.setXAxisMax(mLastTimeReceivedSeconds);
        mCurrentRenderer.setXAxisMin(mLastTimeReceivedSeconds - TIME_INTERVAL_SECONDS);
    }

    mChartView.invalidate();
}

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