Java Code Examples for android.net.wifi.rtt.RangingResult

The following examples show how to use android.net.wifi.rtt.RangingResult. These examples are extracted from open source projects. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source Project: WiFi-RTT-Trilateration   Source File: LocationRangingService.java    License: MIT License 6 votes vote down vote up
@Override
public void onCreate() {
    super.onCreate();
    mWifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE);
    mWifiScanReceiver = new WifiScanReceiver();
    mWifiRttManager = (WifiRttManager) getSystemService(Context.WIFI_RTT_RANGING_SERVICE);
    mRttRangingResultCallback = new RttRangingResultCallback();
    configuration = new Configuration(Configuration.CONFIGURATION_TYPE.TESTING_3);
    //configuration = new Configuration(Configuration.CONFIGURATION_TYPE.TWO_DIMENSIONAL_2);
    buildingMap = configuration.getConfiguration();
    Collections.sort(buildingMap);
    historicalDistances = new HashMap<String, ArrayList<RangingResult>>();
    for (int i = 0; i < buildingMap.size(); i++)
    {
        historicalDistances.put(buildingMap.get(i).getBssid().toString(), new ArrayList<RangingResult>());
    }
}
 
Example 2
public Single<List<RangingResult>> startRanging(
        @NonNull final ScanResult scanResult) {
    return Single.create(emitter -> {
        final RangingRequest request = new RangingRequest.Builder()
                .addAccessPoint(scanResult)
                .build();
        final RangingResultCallback callback = new RangingResultCallback() {
            @Override
            public void onRangingFailure(final int i) {
                emitter.onError(new RuntimeException("The WiFi-Ranging failed with error code: " + i));
            }

            @Override
            public void onRangingResults(final List<RangingResult> list) {
                emitter.onSuccess(list);
            }
        };
        rttManager.startRanging(request, mainExecutor, callback);
    });
}
 
Example 3
Source Project: WiFi-RTT-Trilateration   Source File: LocationRangingService.java    License: MIT License 5 votes vote down vote up
private double weighted_average(List<RangingResult> rangingResults) {
    //  https://en.wikipedia.org/wiki/Weighted_arithmetic_mean#Variance_weights
    double weighted_numerator = 0.0;
    double weighted_demoninator = 0.0;
    for (int i = 0; i < rangingResults.size(); i++)
    {
        weighted_numerator += (rangingResults.get(i).getDistanceMm() * (1.0 / (rangingResults.get(i).getDistanceStdDevMm() ^ 2)));
        weighted_demoninator += (1.0 / (rangingResults.get(i).getDistanceStdDevMm() ^ 2));
    }
    return weighted_numerator / weighted_demoninator;
}
 
Example 4
private String buildLogString(final RangingResult result) {
    String resultString = getString(R.string.log, result.getRangingTimestampMillis(), result.getRssi(), result
            .getDistanceMm(), logView.getText()
            .toString());
    if (resultString.length() > 5000) {
        return resultString.substring(0, 5000);
    }
    return resultString;
}
 
Example 5
private void writeOutput(@NonNull final List<RangingResult> result) {
    if (result.isEmpty()) {
        Timber.d("EMPTY ranging result received.");
        return;
    }
    for (RangingResult res : result) {
        logView.setText(buildLogString(res));
        Timber.d("Result: %d RSSI: %d Distance: %d mm", res.getRangingTimestampMillis(), res.getRssi(), res
                .getDistanceMm());
    }
}
 
Example 6
@Override
public void onRangingResults(@NonNull List<RangingResult> list) {
    Log.d(TAG, "onRangingResults(): " + list);

    // Because we are only requesting RangingResult for one access point (not multiple
    // access points), this will only ever be one. (Use loops when requesting RangingResults
    // for multiple access points.)
    if (list.size() == 1) {

        RangingResult rangingResult = list.get(0);

        if (mMAC.equals(rangingResult.getMacAddress().toString())) {

            if (rangingResult.getStatus() == RangingResult.STATUS_SUCCESS) {

                mNumberOfSuccessfulRangeRequests++;

                mRangeTextView.setText((rangingResult.getDistanceMm() / 1000f) + "");
                addDistanceToHistory(rangingResult.getDistanceMm());
                mRangeMeanTextView.setText((getDistanceMean() / 1000f) + "");

                mRangeSDTextView.setText(
                        (rangingResult.getDistanceStdDevMm() / 1000f) + "");
                addStandardDeviationOfDistanceToHistory(
                        rangingResult.getDistanceStdDevMm());
                mRangeSDMeanTextView.setText(
                        (getStandardDeviationOfDistanceMean() / 1000f) + "");

                mRssiTextView.setText(rangingResult.getRssi() + "");
                mSuccessesInBurstTextView.setText(
                        rangingResult.getNumSuccessfulMeasurements()
                                + "/"
                                + rangingResult.getNumAttemptedMeasurements());

                float successRatio =
                        ((float) mNumberOfSuccessfulRangeRequests
                                        / (float) mNumberOfRangeRequests)
                                * 100;
                mSuccessRatioTextView.setText(successRatio + "%");

                mNumberOfRequestsTextView.setText(mNumberOfRangeRequests + "");

            } else if (rangingResult.getStatus()
                    == RangingResult.STATUS_RESPONDER_DOES_NOT_SUPPORT_IEEE80211MC) {
                Log.d(TAG, "RangingResult failed (AP doesn't support IEEE80211 MC.");

            } else {
                Log.d(TAG, "RangingResult failed.");
            }

        } else {
            Toast.makeText(
                            getApplicationContext(),
                            R.string
                                    .mac_mismatch_message_activity_access_point_ranging_results,
                            Toast.LENGTH_LONG)
                    .show();
        }
    }

    queueNextRangingRequest();
}
 
Example 7
Source Project: WiFi-RTT-Trilateration   Source File: LocationRangingService.java    License: MIT License 4 votes vote down vote up
@Override
public void onRangingResults(@NonNull List<RangingResult> rangingResultsList) {
    Log.d(TAG, "onRangingResults(): " + rangingResultsList);

    //  Ensure we have more APs in the list of ranging results than were present in the configuration
    if (rangingResultsList.size() >= configuration.getConfiguration().size()) {

        //  Sort the received ranging results by MAC address
        //  (order needs to match the order in the config, previously sorted by MAC address)
        Collections.sort(rangingResultsList, new Comparator<RangingResult>() {
            @Override
            public int compare(RangingResult o1, RangingResult o2) {
                return o1.getMacAddress().toString().compareTo(o2.getMacAddress().toString());
            }
        });

        //  Check that the received ranging results are valid and appropriate
        List<RangingResult> rangingResultsOfInterest = new ArrayList<>();
        rangingResultsOfInterest.clear();
        for (int i = 0; i < rangingResultsList.size(); i++) {
            RangingResult rangingResult = rangingResultsList.get(i);
            if (!configuration.getMacAddresses().contains(rangingResult.getMacAddress().toString())) {
                //  The Mac address found is not in our configuration
                showMessage("Unrecognised MAC address: " + rangingResult.getMacAddress().toString() + ", ignoring");
            } else {
                if (rangingResult.getStatus() == RangingResult.STATUS_SUCCESS) {
                    rangingResultsOfInterest.add(rangingResult);
                    if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.Q) {
                        ResponderLocation responderLocation = rangingResultsList.get(0).getUnverifiedResponderLocation();
                        if (responderLocation == null)
                            Log.d(TAG, "ResponderLocation is null (not supported)");
                        else
                            Log.d(TAG, "ResponderLocation is " + responderLocation.toString());
                    }
                } else if (rangingResult.getStatus() == RangingResult.STATUS_RESPONDER_DOES_NOT_SUPPORT_IEEE80211MC) {
                    showMessage("RangingResult failed (AP doesn't support IEEE80211 MC.");
                } else {
                    showMessage("RangingResult failed. (" + rangingResult.getMacAddress().toString() + ")");
                }
            }
        }
        //  rangingResultsOfInterest now contains the list of APs from whom we have received valid ranging results

        //  Check that every AP in our configuration returned a valid ranging result
        //  Potential enhancement: could remove any APs from the building map that we couldn't range to (need at least 2)
        if (rangingResultsOfInterest.size() != configuration.getConfiguration().size())
        {
            showMessage("Could not find all the APs defined in the configuration to range off of");
            if (!bStop)
                queueNextRangingRequest();
            return;
        }

        for (int i = 0; i < rangingResultsOfInterest.size(); i++)
        {
            ArrayList temp = historicalDistances.get(rangingResultsOfInterest.get(i).getMacAddress().toString());
            temp.add(rangingResultsOfInterest.get(i));
            if (temp.size() == Configuration.NUM_HISTORICAL_POINTS + 1)
                temp.remove(0);
            showMessage("Distance to " + rangingResultsOfInterest.get(i).getMacAddress().toString() +
                    " [Ave]: " + (int)weighted_average(historicalDistances.get(rangingResultsOfInterest.get(i).getMacAddress().toString())) + "mm");
            showMessage("Distance to " + rangingResultsOfInterest.get(i).getMacAddress().toString() +
                    " : " + rangingResultsOfInterest.get(i).getMacAddress().toString() + "mm");
        }

        //  historicalDistances now contains an arraylist of historic distances for each AP
        //  because of an earlier check, we know that every AP in the building map has an associated
        //  entry in the history of observed ranging results
        //  Create the positions and distances arrays required by the multilateration algorithm
        double[][] positions = new double[buildingMap.size()][3]; //  3 dimensions
        double[] distances = new double[buildingMap.size()];
        for (int i = 0; i < buildingMap.size(); i++)
        {
            positions[i] = buildingMap.get(i).getPosition();
            distances[i] = weighted_average(historicalDistances.get(rangingResultsOfInterest.get(i).getMacAddress().toString()));
        }

        try {
            NonLinearLeastSquaresSolver solver = new NonLinearLeastSquaresSolver(new TrilaterationFunction(positions, distances), new LevenbergMarquardtOptimizer());
            LeastSquaresOptimizer.Optimum optimum = solver.solve();
            double[] centroid = optimum.getPoint().toArray();
            Intent centroidIntent = new Intent(Constants.SERVICE_COMMS.LOCATION_COORDS);
            centroidIntent.putExtra(Constants.SERVICE_COMMS.LOCATION_COORDS, centroid);
            sendBroadcast(centroidIntent);
        }
        catch (Exception e)
        {
            showMessage("Error during trilateration: " + e.getMessage());
        }

    }
    else
    {
        showMessage("Could not find enough Ranging Results");
    }
    if (!bStop)
        queueNextRangingRequest();
}
 
Example 8
@Override
public void onRangingResults(@NonNull List<RangingResult> list) {
    Log.d(TAG, "onRangingResults(): " + list);

    // Because we are only requesting RangingResult for one access point (not multiple
    // access points), this will only ever be one. (Use loops when requesting RangingResults
    // for multiple access points.)
    if (list.size() == 1) {

        RangingResult rangingResult = list.get(0);

        if (mMAC.equals(rangingResult.getMacAddress().toString())) {

            if (rangingResult.getStatus() == RangingResult.STATUS_SUCCESS) {

                mNumberOfSuccessfulRangeRequests++;

                mRangeTextView.setText((rangingResult.getDistanceMm() / 1000f) + "");
                addDistanceToHistory(rangingResult.getDistanceMm());
                mRangeMeanTextView.setText((getDistanceMean() / 1000f) + "");

                mRangeSDTextView.setText(
                        (rangingResult.getDistanceStdDevMm() / 1000f) + "");
                addStandardDeviationOfDistanceToHistory(
                        rangingResult.getDistanceStdDevMm());
                mRangeSDMeanTextView.setText(
                        (getStandardDeviationOfDistanceMean() / 1000f) + "");

                mRssiTextView.setText(rangingResult.getRssi() + "");
                mSuccessesInBurstTextView.setText(
                        rangingResult.getNumSuccessfulMeasurements()
                                + "/"
                                + rangingResult.getNumAttemptedMeasurements());

                float successRatio =
                        ((float) mNumberOfSuccessfulRangeRequests
                                        / (float) mNumberOfRangeRequests)
                                * 100;
                mSuccessRatioTextView.setText(successRatio + "%");

                mNumberOfRequestsTextView.setText(mNumberOfRangeRequests + "");

            } else if (rangingResult.getStatus()
                    == RangingResult.STATUS_RESPONDER_DOES_NOT_SUPPORT_IEEE80211MC) {
                Log.d(TAG, "RangingResult failed (AP doesn't support IEEE80211 MC.");

            } else {
                Log.d(TAG, "RangingResult failed.");
            }

        } else {
            Toast.makeText(
                            getApplicationContext(),
                            R.string
                                    .mac_mismatch_message_activity_access_point_ranging_results,
                            Toast.LENGTH_LONG)
                    .show();
        }
    }

    queueNextRangingRequest();
}