added gitingore

android/ConductorsWatch/app/build.gradle

@@ -28,12 +28,16 @@ android {
         }
     }
 
+    compileOptions {
+        targetCompatibility 1.8
+        sourceCompatibility 1.8
+    }
 }
 
 dependencies {
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation 'com.google.android.support:wearable:2.1.0'
-    implementation 'com.google.android.gms:play-services-wearable:11.6.0'
+    implementation 'com.google.android.gms:play-services-wearable:11.8.0'
     implementation 'com.android.support:percent:26.1.0'
     implementation 'com.android.support:animated-vector-drawable:26.1.0'
     implementation 'com.android.support:appcompat-v7:26.1.0'

android/ConductorsWatch/app/src/main/AndroidManifest.xml

@@ -19,10 +19,13 @@
         <!--
                Set to true if your app is Standalone, that is, it does not require the handheld
                app to run.
-        -->
         <meta-data
             android:name="com.google.android.wearable.standalone"
             android:value="true" />
+        -->
+
+        <meta-data android:name="com.google.android.gms.version"
+            android:value="@integer/google_play_services_version" />
 
         <activity
             android:name=".MainActivity"

android/ConductorsWatch/app/src/main/java/de/tonifetzer/conductorswatch/Croller.java

@@ -399,7 +399,7 @@ public class Croller extends View {
     @Override
     public boolean onTouchEvent(MotionEvent e) {
 
-        float distancePointToMiddle = Utils.getDistance(e.getX(), e.getY(), midx, midy);
+        double distancePointToMiddle = Utils.getDistance(e.getX(), e.getY(), midx, midy);
         if ((distancePointToMiddle > touchCircleRadiusMax || distancePointToMiddle < touchCircleRadiusMin)) {
             if (startEventSent && mCrollerChangeListener != null) {
                 mCrollerChangeListener.onStopTrackingTouch(this);

android/ConductorsWatch/app/src/main/java/de/tonifetzer/conductorswatch/Estimator.java

@@ -9,6 +9,9 @@ import android.os.Handler;
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
 
+import de.tonifetzer.conductorswatch.bpmEstimation.AccelerometerData;
+import de.tonifetzer.conductorswatch.bpmEstimation.AccelerometerWindowBuffer;
+import de.tonifetzer.conductorswatch.bpmEstimation.BpmEstimator;
 import de.tonifetzer.conductorswatch.utilities.Utils;
 
 /**
@@ -21,7 +24,8 @@ public class Estimator implements SensorEventListener {
     private SensorManager mSensorManager;
     private Sensor mAccelerometer;
     private Context mContext;
-    private Utils.AccelerometerWindowBuffer mAccelerometerWindowBuffer;
+    private AccelerometerWindowBuffer mAccelerometerWindowBuffer;
+    private BpmEstimator mBpmEstimator;
 
     private Handler mHandler;
     private int mUpdaterate_ms = 100;
@@ -34,13 +38,10 @@ public class Estimator implements SensorEventListener {
 
             if(mAccelerometerWindowBuffer.isNextWindowReady()){
 
-                //TODO: calculate average samplerate using the window - interpolation of sensordata would be better i think
-
-                //int randomNum = ThreadLocalRandom.current().nextInt(0, 240 + 1);
-                long diff = mAccelerometerWindowBuffer.getYongest().ts - mAccelerometerWindowBuffer.getOldest().ts;
+                double bpm = mBpmEstimator.estimate();
 
                 for (OnBpmEstimatorListener listener:listeners) {
-                    listener.onNewDataAvailable((float) diff);
+                    listener.onNewDataAvailable(bpm);
                 }
             }
 
@@ -61,7 +62,8 @@ public class Estimator implements SensorEventListener {
         mAccelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_LINEAR_ACCELERATION);
         mSensorManager.registerListener(this, mAccelerometer, SensorManager.SENSOR_DELAY_FASTEST);
 
-        mAccelerometerWindowBuffer = new Utils.AccelerometerWindowBuffer(4096, 256);
+        mAccelerometerWindowBuffer = new AccelerometerWindowBuffer(1024, 256);
+        mBpmEstimator = new BpmEstimator(mAccelerometerWindowBuffer, 0, 5000);
 
         mHandler = new Handler();
         mHandler.post(mProcessSensors); //start runnable
@@ -81,7 +83,7 @@ public class Estimator implements SensorEventListener {
 
         //ca 200hz, every 5 to 6 ms we have an update
             if (se.sensor.getType() == Sensor.TYPE_LINEAR_ACCELERATION) {
-                mAccelerometerWindowBuffer.add(new Utils.AccelerometerData(System.currentTimeMillis(), se.values[0], se.values[1], se.values[2]));
+                mAccelerometerWindowBuffer.add(new AccelerometerData(System.currentTimeMillis(), se.values[0], se.values[1], se.values[2]));
             }
 
            // mSensorUpdateFlag = false;
@@ -98,7 +100,7 @@ public class Estimator implements SensorEventListener {
      * Interface for callback calculated bpm
      */
     public interface OnBpmEstimatorListener {
-        void onNewDataAvailable(float bpm);
+        void onNewDataAvailable(double bpm);
     }
 
     private List<OnBpmEstimatorListener> listeners = new CopyOnWriteArrayList<OnBpmEstimatorListener>();

android/ConductorsWatch/app/src/main/java/de/tonifetzer/conductorswatch/MainActivity.java

@@ -7,18 +7,31 @@ import android.graphics.Point;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Vibrator;
+import android.support.annotation.NonNull;
+import android.support.annotation.Nullable;
 import android.support.wearable.activity.WearableActivity;
 import android.util.Log;
 import android.view.GestureDetector;
 import android.view.MotionEvent;
 import android.widget.TextView;
 
+import com.google.android.gms.common.ConnectionResult;
+import com.google.android.gms.common.api.GoogleApiClient;
+import com.google.android.gms.common.api.ResultCallback;
+import com.google.android.gms.wearable.MessageApi;
+import com.google.android.gms.wearable.Node;
+import com.google.android.gms.wearable.NodeApi;
+import com.google.android.gms.wearable.Wearable;
+
 import java.sql.Time;
+import java.util.List;
 import java.util.Vector;
+import java.util.concurrent.TimeUnit;
 
 import de.tonifetzer.conductorswatch.utilities.Utils;
 
-public class MainActivity extends WearableActivity implements WorkerFragment.OnFragmentInteractionListener, TapBpm.OnTapBpmListener{
+public class MainActivity extends WearableActivity implements WorkerFragment.OnFragmentInteractionListener, TapBpm.OnTapBpmListener, GoogleApiClient.ConnectionCallbacks,
+        GoogleApiClient.OnConnectionFailedListener{
 
     // member
     private TextView mTextView;
@@ -26,6 +39,13 @@ public class MainActivity extends WearableActivity implements WorkerFragment.OnF
     private GestureDetector mDetector;
     private boolean mModeRecord;
 
+    // connection to phone stuff
+    private static final String START_ACTIVITY_PATH = "/start-activity";
+    public static final String TAG = "DataLayerListenerService";
+    private GoogleApiClient mGoogleApiClient;
+    private Node mNode;
+    private boolean mResolvingError = false;
+
     // display center
     private int mDisplayWidth;
     private int mDisplayHeight;
@@ -47,6 +67,7 @@ public class MainActivity extends WearableActivity implements WorkerFragment.OnF
     private int mLongPressDelay = 1200; // in Milliseconds
     private boolean mLongPressHandlerActivated = false;
     private final Handler mHandler = new Handler();
+
     private Runnable mLongPressed = new Runnable() {
         public void run() {
             Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
@@ -91,7 +112,7 @@ public class MainActivity extends WearableActivity implements WorkerFragment.OnF
         Point currentPoint = new Point((int)ev.getX(), (int)ev.getY());
 
         //make sure the longPress only works within the maincircle of the scroller
-        float distancePointToMiddle = Utils.getDistance(currentPoint.x, currentPoint.y, (float) (mDisplayWidth / 2.0f), (float) (mDisplayHeight / 2.0f));
+        double distancePointToMiddle = Utils.getDistance(currentPoint.x, currentPoint.y, (mDisplayWidth / 2.0f), (mDisplayHeight / 2.0f));
         if ((distancePointToMiddle > mCroller.getMainCircleRadius())){
             mHandler.removeCallbacks(mLongPressed);
             return false;
@@ -134,7 +155,7 @@ public class MainActivity extends WearableActivity implements WorkerFragment.OnF
         Point currentPoint = new Point((int)ev.getX(), (int)ev.getY());
 
         //only works within the maincircle of the scroller
-        float distancePointToMiddle = Utils.getDistance(currentPoint.x, currentPoint.y, mDisplayCenter.x, mDisplayCenter.y);
+        double distancePointToMiddle = Utils.getDistance(currentPoint.x, currentPoint.y, mDisplayCenter.x, mDisplayCenter.y);
         if ((distancePointToMiddle > mCroller.getMainCircleRadius())){
 
             //if we are outside the area of interest and the animation is already running, we need to reset
@@ -170,7 +191,7 @@ public class MainActivity extends WearableActivity implements WorkerFragment.OnF
         Point currentPoint = new Point((int)ev.getX(), (int)ev.getY());
 
         //only works within the maincircle of the scroller
-        float distancePointToMiddle = Utils.getDistance(currentPoint.x, currentPoint.y, mDisplayCenter.x, mDisplayCenter.y);
+        double distancePointToMiddle = Utils.getDistance(currentPoint.x, currentPoint.y, mDisplayCenter.x, mDisplayCenter.y);
         if ((distancePointToMiddle > mCroller.getMainCircleRadius())){
 
             mCroller.setProgress(mCroller.getProgress());
@@ -204,6 +225,14 @@ public class MainActivity extends WearableActivity implements WorkerFragment.OnF
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_main);
 
+        //init GoogleApiClient and get nodeid (phone)
+        mGoogleApiClient = new GoogleApiClient.Builder(this)
+                .addApi(Wearable.API)
+                .addConnectionCallbacks(this)
+                .addOnConnectionFailedListener(this)
+                .build();
+
+        //get display infos
         mDisplayWidth= this.getResources().getDisplayMetrics().widthPixels;
         mDisplayHeight= this.getResources().getDisplayMetrics().heightPixels;
         mDisplayCenter = new Point((mDisplayWidth / 2), (mDisplayHeight / 2));
@@ -224,6 +253,7 @@ public class MainActivity extends WearableActivity implements WorkerFragment.OnF
             public void onProgressChanged(int progress) {
                 // use the progress
                 mTextView.setText(String.valueOf(progress));
+                sendMessage(Integer.toString(progress));
             }
         });
 
@@ -242,6 +272,29 @@ public class MainActivity extends WearableActivity implements WorkerFragment.OnF
         setAmbientEnabled();
     }
 
+    private void sendMessage(String Key) {
+
+        if (mNode != null && mGoogleApiClient!= null && mGoogleApiClient.isConnected()) {
+            Log.d(TAG, "-- " + mGoogleApiClient.isConnected());
+            Wearable.MessageApi.sendMessage(
+                    mGoogleApiClient, mNode.getId(), Key, new byte[0]).setResultCallback(
+
+                    new ResultCallback<MessageApi.SendMessageResult>() {
+                        @Override
+                        public void onResult(MessageApi.SendMessageResult sendMessageResult) {
+
+                            Log.d(TAG, "--- " + sendMessageResult.getStatus().getStatusCode());
+                            if (!sendMessageResult.getStatus().isSuccess()) {
+                                Log.e(TAG, "Failed to send message with status code: "
+                                        + sendMessageResult.getStatus().getStatusCode());
+                            }
+                        }
+                    }
+            );
+        }
+
+    }
+
     @Override
     public boolean dispatchTouchEvent(MotionEvent ev) {
 
@@ -265,14 +318,33 @@ public class MainActivity extends WearableActivity implements WorkerFragment.OnF
 
 
     @Override
-    public void onFragmentStopped(Vector<Float> bpmList) {
+    public void onFragmentStopped(Vector<Double> bpmList) {
 
         //TODO: save the bpmList into a file
 
+        //TODO: send bpmList and all other data to phone
 
         Log.d("FragmentListener", "Received bpmList");
     }
 
+    @Override
+    protected void onStart() {
+        super.onStart();
+        if (!mResolvingError) {
+            mGoogleApiClient.connect();
+        }
+
+
+        //start app on phone
+        //TODO: bissle cleverer machen. starten und auf antwort warten. falls er sagt "bin schon an" nicht mehr senden
+        // ansonsten nochmal versuchen.bzw. auch von anderen stellen (bei click etc) aufrufen.
+
+
+
+
+        //TODO: disconnect or own class for this stuff
+    }
+
     @Override
     public void onNewEstimation(int bpm) {
         mTapBpmEstimation = bpm;
@@ -310,4 +382,45 @@ public class MainActivity extends WearableActivity implements WorkerFragment.OnF
             e.printStackTrace();
         }
     }
+
+    @Override
+    public void onConnected(@Nullable Bundle bundle) {
+        resolveNode();
+
+
+        new Thread(new Runnable() {
+            @Override
+            public void run() {
+
+                while(mNode == null){
+
+                }
+                sendMessage(START_ACTIVITY_PATH);
+            }
+        }).start();
+
+    }
+
+    @Override
+    public void onConnectionSuspended(int i) {
+
+    }
+
+    @Override
+    public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
+
+    }
+
+    private void resolveNode() {
+
+        Wearable.NodeApi.getConnectedNodes(mGoogleApiClient)
+                .setResultCallback(new ResultCallback<NodeApi.GetConnectedNodesResult>() {
+                    @Override
+                    public void onResult(NodeApi.GetConnectedNodesResult nodes) {
+                        for (Node node : nodes.getNodes()) {
+                            mNode = node;
+                        }
+                    }
+                });
+    }
 }

android/ConductorsWatch/app/src/main/java/de/tonifetzer/conductorswatch/WorkerFragment.java

@@ -22,7 +22,7 @@ import java.util.Vector;
 public class WorkerFragment extends Fragment implements Metronome.OnMetronomeListener, Estimator.OnBpmEstimatorListener{
 
     private OnFragmentInteractionListener mListener;
-    private Vector<Float> mBpmList; //TODO save to file.
+    private Vector<Double> mBpmList; //TODO save to file.
 
     private Estimator mEstimator;
     private Metronome mMetronome;
@@ -59,7 +59,7 @@ public class WorkerFragment extends Fragment implements Metronome.OnMetronomeLis
         mEstimator = new Estimator(getContext());
         mEstimator.add(this);
         //mBpmThread = new Thread(mEstimator, "estThread");
-        mBpmList = new Vector<Float>();
+        mBpmList = new Vector<Double>();
 
 
         // init metronome and listener
@@ -138,17 +138,22 @@ public class WorkerFragment extends Fragment implements Metronome.OnMetronomeLis
      */
     @Override
     public void onNewClick() {
-        mVibrator.vibrate(10);
+        //mVibrator.vibrate(10);
     }
 
     /**
      * Callback function for Bpm estimation update
      */
     @Override
-    public void onNewDataAvailable(float bpm) {
+    public void onNewDataAvailable(double bpm) {
 
         //TODO: what if multiple threads access mBpmList? put into synchronized? @frank fragen :D
         //TODO: send this to smartphone
+
+        if(bpm == -1){
+            //to stuff with UI. Write Text or make XX or something like that
+        }
+
         mBpmList.add(bpm);
 
         // we need this here, since ui elements can only be changed within activity thread and
@@ -160,7 +165,7 @@ public class WorkerFragment extends Fragment implements Metronome.OnMetronomeLis
                 public void run() {
 
                     mTextView.setText(String.valueOf(mBpmList.lastElement()));
-                    mCroller.setProgress((Math.round(mBpmList.lastElement())));
+                    mCroller.setProgress((int)(Math.round(mBpmList.lastElement())));
                 }
             });
         }
@@ -170,7 +175,7 @@ public class WorkerFragment extends Fragment implements Metronome.OnMetronomeLis
      * Interface for connecting to WorkerFragment
      */
     public interface OnFragmentInteractionListener {
-        void onFragmentStopped(Vector<Float> bpmList);
+        void onFragmentStopped(Vector<Double> bpmList);
     }
 
 }

android/ConductorsWatch/app/src/main/java/de/tonifetzer/conductorswatch/utilities/Utils.java

@@ -3,14 +3,162 @@ package de.tonifetzer.conductorswatch.utilities;
 import android.content.Context;
 import android.content.res.Resources;
 import android.util.DisplayMetrics;
-import org.jtransforms.fft.FloatFFT_1D;
-import java.util.ArrayList;
-import java.util.Arrays;
 
+import java.util.Comparator;
+import java.util.LinkedList;
 
+//TODO: change from double to generic type
 public class Utils {
-    public static float getDistance(float x1, float y1, float x2, float y2) {
-        return (float) Math.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
+    public static double getDistance(double x1, double y1, double x2, double y2) {
+        return (double) Math.sqrt((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
+    }
+
+    public static double sqr(double x) {
+        return x * x;
+    }
+
+    public static int nextPow2(int a){
+        return a == 0 ? 0 : 32 - Integer.numberOfLeadingZeros(a - 1);
+    }
+
+    public static double sum(double[] data){
+        double sum = 0;
+        for (int i = 0; i < data.length; i++) {
+            sum += data[i];
+        }
+        return sum;
+    }
+
+    public static long sum(long[] data){
+        long sum = 0;
+        for (int i = 0; i < data.length; i++) {
+            sum += data[i];
+        }
+        return sum;
+    }
+
+    public static double sum (LinkedList<Double> data){
+        double sum = 0;
+        for (int i = 0; i < data.size(); i++) {
+            sum += data.get(i).doubleValue();
+        }
+        return sum;
+    }
+
+    //TODO: Could be slow.. faster method?
+    public static double rms(double[] nums) {
+        double sum = 0.0f;
+        for (double num : nums)
+            sum += num * num;
+        return Math.sqrt(sum / nums.length);
+    }
+
+    public static double[] diff(double[] data){
+        double[] diff = new double[data.length - 1];
+        int i=0;
+        for(int j = 1; j < data.length; ++j){
+            diff[i] = data[j] - data[i];
+            ++i;
+        }
+        return diff;
+    }
+
+    public static long[] diff(long[] data){
+        long[] diff = new long[data.length - 1];
+        int i=0;
+        for(int j = 1; j < data.length; ++j){
+            diff[i] = data[j] - data[i];
+            ++i;
+        }
+        return diff;
+    }
+
+    public static double mean(double[] data){
+        return sum(data) / data.length;
+    }
+
+    public static double mean(long[] data){
+        return (double) sum(data) / (double) data.length;
+    }
+
+    public static double mean(LinkedList<Double> data){
+        return sum(data) / data.size();
+    }
+
+    public static double median(LinkedList<Double> data){
+        data.sort(Comparator.naturalOrder());
+
+        double median;
+        if (data.size() % 2 == 0)
+            median = (data.get(data.size()/2) + data.get(data.size()/2 - 1))/2;
+        else
+            median = data.get(data.size()/2);
+
+        return median;
+    }
+
+    //TODO: Could be slow.. faster method?
+    public static double geometricMean(double[] data) {
+        double sum = data[0];
+        for (int i = 1; i < data.length; i++) {
+            sum *= data[i];
+        }
+        return Math.pow(sum, 1.0 / data.length);
+    }
+
+    public static int intersectionNumber(double[] signal, double border){
+        int cnt = 0;
+        boolean isSmallerValue = false;
+        boolean isBiggerValue = false;
+
+        for(double value : signal){
+            if(value < border){
+                if(isBiggerValue){
+                    cnt++;
+                }
+
+                isSmallerValue = true;
+                isBiggerValue = false;
+            }
+            else {
+                if(isSmallerValue){
+                    cnt++;
+                }
+
+                isSmallerValue = false;
+                isBiggerValue = true;
+            }
+        }
+
+        return cnt;
+    }
+
+    public static double[] removeZero(double[] array){
+        int j = 0;
+        for( int i=0;  i<array.length;  i++ )
+        {
+            if (array[i] != 0){
+                array[j++] = array[i];
+            }
+        }
+        double[] newArray = new double[j];
+        System.arraycopy( array, 0, newArray, 0, j );
+
+        return newArray;
+    }
+
+    public static double[] greaterZero(double[] array){
+        int j = 0;
+        for( int i=0;  i < array.length;  i++ )
+        {
+            if (array[i] > 0){
+                array[j++] = array[i];
+            }
+        }
+        double[] newArray = new double[j];
+        System.arraycopy( array, 0, newArray, 0, j );
+
+        return newArray;
     }
 
     public static float convertDpToPixel(float dp, Context context) {
@@ -25,174 +173,4 @@ public class Utils {
         return px / ((float) metrics.densityDpi / DisplayMetrics.DENSITY_DEFAULT);
     }
 
-    public static class AccelerometerData {
-
-        public float x,y,z;
-        public long ts;
-
-        public AccelerometerData(long ts, float x, float y, float z){
-            this.ts = ts;
-            this.x = x;
-            this.y = y;
-            this.z = z;
-        }
-    }
-
-    public static class AccelerometerWindowBuffer extends ArrayList<AccelerometerData> {
-
-        private int mWindowSize;
-        private int mOverlapSize;
-        private int mOverlapCounter;
-        private float[] mX;
-        private float[] mY;
-        private float[] mZ;
-        private long[] mTs;
-
-        public AccelerometerWindowBuffer(int windowSize, int overlap){
-            this.mWindowSize = windowSize;
-            this.mOverlapSize = overlap;
-            mOverlapCounter = 1;
-
-            mX = new float[this.mWindowSize];
-            mY = new float[this.mWindowSize];
-            mZ = new float[this.mWindowSize];
-            mTs = new long[this.mWindowSize];
-        }
-
-        public boolean add(AccelerometerData ad){
-            boolean r = super.add(ad);
-            if (size() > mWindowSize){
-                removeRange(0, size() - mWindowSize);
-            }
-
-            //update the double arrays.
-            for (int i = 0; i < size(); ++i) {
-                mX[i] = get(i).x;
-                mY[i] = get(i).y;
-                mZ[i] = get(i).z;
-                mTs[i] = get(i).ts;
-            }
-
-            ++mOverlapCounter;
-            return r;
-        }
-
-        public boolean isNextWindowReady(){
-            if(size() == mWindowSize && mOverlapCounter > mOverlapSize){
-                mOverlapCounter = 1;
-                return true;
-            }
-            return false;
-        }
-
-        public AccelerometerData getYongest() {
-            return get(size() - 1);
-        }
-
-        public AccelerometerData getOldest() {
-            return get(0);
-        }
-
-        public float[] getX(){
-            return mX;
-        }
-
-        public float[] getY(){
-            return mY;
-        }
-
-        public float[] getZ(){
-            return mZ;
-        }
-
-        public long[] getTs(){
-            return mTs;
-        }
-    }
-
-
-    public static float sqr(float x) {
-        return x * x;
-    }
-
-    public static int nextPow2(int a){
-        return a == 0 ? 0 : 32 - Integer.numberOfLeadingZeros(a - 1);
-    }
-
-    public static float mean(float[] data){
-        float sum = 0;
-        for (int i = 0; i < data.length; i++) {
-            sum += data[i];
-        }
-        return sum / data.length;
-    }
-
-    public static float[] removeZero(float[] array){
-        int j = 0;
-        for( int i=0;  i<array.length;  i++ )
-        {
-            if (array[i] != 0)
-                array[j++] = array[i];
-        }
-        float[] newArray = new float[j];
-        System.arraycopy( array, 0, newArray, 0, j );
-
-        return newArray;
-    }
-
-    //TODO: errorhandling maxLag = 0;
-    //TODO: größeren Testcase schreiben
-    public static float[] fftAutoCorrelation(float[] data, int maxLag) {
-
-        int n = data.length;
-        float[] x = Arrays.copyOf(data, n);
-        int mxl = Math.min(maxLag, n - 1);
-        int ceilLog2 = nextPow2(2*n -1);
-        int n2 = (int) Math.pow(2,ceilLog2);
-
-        // x - mean(x) (pointwise)
-        float x_mean = mean(x);
-        for(int i = 0; i < x.length; ++i){
-            x[i] -= x_mean;
-        }
-
-        // double the size of x and fill up with zeros. if x is not even, add additional 0
-        float[] x2 = new float[n2 * 2]; //need double the size for fft.realForwardFull (look into method description)
-        Arrays.fill(x2, 0);
-        System.arraycopy(x,0, x2, 0, x.length);
-
-        // x_fft calculate fft 1D
-        FloatFFT_1D fft = new FloatFFT_1D(n2);
-        fft.realForwardFull(x2);
-
-        // Cr = abs(x_fft).^2 (absolute with complex numbers is (r^2) + (i^2)
-        float[] Cr = new float[n2 * 2];
-        int j = 0;
-        for(int i = 0; i < x2.length; ++i){
-            Cr[j++] = sqr(x2[i]) + sqr(x2[i+1]);
-            ++i;  //skip the complex part
-        }
-
-        // ifft(Cr,[],1)
-        FloatFFT_1D ifft = new FloatFFT_1D(n2);
-        ifft.realInverseFull(Cr, true);
-
-        // remove complex part and scale/normalize
-        float[] c1 = new float[n2];
-        j = 0;
-        for(int i = 0; i < Cr.length; ++i){
-            c1[j++] = Cr[i] / Cr[0];
-            ++i;  //skip the complex part
-        }
-
-        // Keep only the lags we want and move negative lags before positive lags.
-        float[] c = new float[(mxl * 2) + 1];
-        System.arraycopy(c1, 0, c, mxl, mxl + 1); // +1 to place the 1.0 in the middle of correlation
-        System.arraycopy(c1, n2 - mxl, c, 0, mxl);
-
-        return c;
-    }
-
-    //TODO: findPeaks
-
 }

android/ConductorsWatch/app/src/main/res/values/strings.xml

@@ -1,11 +1,3 @@
 <resources>
     <string name="app_name">Conductor\'s Watch</string>
-    <!--
-    This string is used for square devices and overridden by hello_world in
-    values-round/strings.xml for round devices.
-    -->
-    <string name="hello_world">Hello Square World!</string>
-
-    <!-- TODO: Remove or change this placeholder text -->
-    <string name="hello_blank_fragment">Hello blank fragment</string>
 </resources>