Created foreground service

.idea/assetWizardSettings.xml

@@ -0,0 +1,102 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="WizardSettings">
+    <option name="children">
+      <map>
+        <entry key="imageWizard">
+          <value>
+            <PersistentState>
+              <option name="children">
+                <map>
+                  <entry key="imageAssetPanel">
+                    <value>
+                      <PersistentState>
+                        <option name="children">
+                          <map>
+                            <entry key="launcher">
+                              <value>
+                                <PersistentState>
+                                  <option name="children">
+                                    <map>
+                                      <entry key="foregroundImage">
+                                        <value>
+                                          <PersistentState>
+                                            <option name="values">
+                                              <map>
+                                                <entry key="scalingPercent" value="146" />
+                                                <entry key="trimmed" value="true" />
+                                              </map>
+                                            </option>
+                                          </PersistentState>
+                                        </value>
+                                      </entry>
+                                    </map>
+                                  </option>
+                                  <option name="values">
+                                    <map>
+                                      <entry key="foregroundImage" value="$PROJECT_DIR$/../Heart_Rate_Monitor_Flat_Icon_Vector.svg" />
+                                      <entry key="showSafeZone" value="false" />
+                                    </map>
+                                  </option>
+                                </PersistentState>
+                              </value>
+                            </entry>
+                            <entry key="notification">
+                              <value>
+                                <PersistentState>
+                                  <option name="children">
+                                    <map>
+                                      <entry key="clipArt">
+                                        <value>
+                                          <PersistentState>
+                                            <option name="values">
+                                              <map>
+                                                <entry key="trimmed" value="true" />
+                                              </map>
+                                            </option>
+                                          </PersistentState>
+                                        </value>
+                                      </entry>
+                                      <entry key="image">
+                                        <value>
+                                          <PersistentState>
+                                            <option name="values">
+                                              <map>
+                                                <entry key="paddingPercent" value="5" />
+                                                <entry key="trimmed" value="true" />
+                                              </map>
+                                            </option>
+                                          </PersistentState>
+                                        </value>
+                                      </entry>
+                                    </map>
+                                  </option>
+                                  <option name="values">
+                                    <map>
+                                      <entry key="assetType" value="IMAGE" />
+                                      <entry key="imageAsset" value="$PROJECT_DIR$/../icon_notif.png" />
+                                      <entry key="outputName" value="ic_notification" />
+                                    </map>
+                                  </option>
+                                </PersistentState>
+                              </value>
+                            </entry>
+                          </map>
+                        </option>
+                        <option name="values">
+                          <map>
+                            <entry key="outputIconType" value="NOTIFICATION" />
+                          </map>
+                        </option>
+                      </PersistentState>
+                    </value>
+                  </entry>
+                </map>
+              </option>
+            </PersistentState>
+          </value>
+        </entry>
+      </map>
+    </option>
+  </component>
+</project>

README.md

@@ -0,0 +1 @@
+Icon by [VideoPlasty](https://videoplasty.com/) Creative Commons BY-SA, trough [WikiMedia](https://commons.wikimedia.org/wiki/File:Heart_Rate_Monitor_Flat_Icon_Vector.svg)

app/src/main/java/com/rubenvandeven/heartbeatstreamer/MainActivity.java

@@ -8,6 +8,7 @@ import android.content.IntentFilter;
 import android.support.v7.app.AppCompatActivity;
 import android.os.Bundle;
 import android.util.Log;
+import android.view.View;
 import android.widget.TextView;
 import android.widget.Toast;
 
@@ -28,6 +29,8 @@ public class MainActivity extends AppCompatActivity {
     private final String TAG = MainActivity.class.getSimpleName();
 
     private TextView statusLabel;
+    private TextView serviceButton;
+    private TextView beatStatus;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -35,6 +38,21 @@ public class MainActivity extends AppCompatActivity {
         setContentView(R.layout.activity_main);
 
         statusLabel = findViewById(R.id.status_msg);
+        serviceButton = findViewById(R.id.service_button);
+        beatStatus = findViewById(R.id.beat_status);
+
+//        View.OnClickListener listener = new On;
+        serviceButton.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                serviceButton.setEnabled(false);
+                if(HeartRateService.isRunning()) {
+                    startHeartRateMonitor();
+                } else {
+                    stopHeartRateMonitor();
+                }
+            }
+        });
 
         setup();
 
@@ -53,8 +71,10 @@ public class MainActivity extends AppCompatActivity {
     public void setup() {
         if (HeartRateService.isRunning()) {
             statusLabel.setText("Running");
+            updateServiceButton(true);
         } else {
             statusLabel.setText("Stopped");
+            updateServiceButton(false);
         }
         registerBroadcastReceiver();
     }
@@ -64,14 +84,25 @@ public class MainActivity extends AppCompatActivity {
             Toast.makeText(this, "Already running", Toast.LENGTH_LONG);
         } else {
             Intent intent = new Intent(MainActivity.this, HeartRateService.class);
+            intent.setAction(HeartRateService.ACTION_START);
             startService(intent);
         }
     }
 
+    public void updateServiceButton(boolean running) {
+        if(running) {
+            serviceButton.setText(R.string.service_stop);
+        } else {
+            serviceButton.setText(R.string.service_start);
+        }
+        serviceButton.setEnabled(true);
+    }
+
     public void stopHeartRateMonitor() {
         // stop tracking
         Intent intent = new Intent(MainActivity.this, HeartRateService.class);
-        stopService(intent);
+        intent.setAction(HeartRateService.ACTION_STOP);
+        startService(intent);
     }
 
     /**
@@ -86,6 +117,11 @@ public class MainActivity extends AppCompatActivity {
         filter.addAction(HeartRateService.BROADCAST_MONITOR_UPDATE);
         filter.addAction(HeartRateService.BROADCAST_MONITOR_UNKNOWN);
         filter.addAction(HeartRateService.BROADCAST_SOCKET_SENT);
+        filter.addAction(HeartRateService.BROADCAST_SERVICE_START);
+        filter.addAction(HeartRateService.BROADCAST_SERVICE_STOPPED);
+        filter.addAction(HeartRateService.BROADCAST_BEAT);
+        filter.addAction(HeartRateService.BROADCAST_MONITOR_CONNECT_ATTEMPT);
+        filter.addAction(HeartRateService.BROADCAST_MONITOR_CONNECT_RESULT);
         registerReceiver(mBroadcastReceiver, filter);
     }
 
@@ -112,53 +148,50 @@ public class MainActivity extends AppCompatActivity {
                 return;
             }
             switch (intent.getAction()) {
+                case HeartRateService.BROADCAST_SERVICE_START:
+                    statusLabel.setText("Started");
+                    updateServiceButton(true);
+                    break;
+                case HeartRateService.BROADCAST_SERVICE_STOPPED:
+                    statusLabel.setText("Service Stopped");
+                    updateServiceButton(false);
+                    break;
                 case HeartRateService.BROADCAST_MONITOR_CONNECTED:
-                    statusLabel.setText("Running");
+                    statusLabel.setText("Connected");
                     break;
                 case HeartRateService.BROADCAST_MONITOR_DISCONNECTED:
-                    statusLabel.setText("Stopped");
+                    statusLabel.setText("Disconnected");
                     break;
                 case HeartRateService.BROADCAST_MONITOR_UPDATE:
                     SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMdd_HHmmss");
                     String currentDateandTime = sdf.format(new Date());
                     statusLabel.setText("Last update: %s".format(currentDateandTime));
                     break;
-
                 case HeartRateService.BROADCAST_SOCKET_SENT:
                     String msg = intent.getStringExtra("msg");
                     statusLabel.setText("Last msg: %s".format(msg));
                     break;
+                case HeartRateService.BROADCAST_MONITOR_UNKNOWN:
+                    int status = intent.getIntExtra("status", -1);
+                    statusLabel.setText("Unknown state: %s".format(String.valueOf(status)));
+                    break;
+                case HeartRateService.BROADCAST_BEAT:
+                    String rate = intent.getStringExtra("rate");
+                    String count = intent.getStringExtra("count");
+                    String time = intent.getStringExtra("time");
+                    Log.d(TAG, "Beat: " + rate);
+                    beatStatus.setText(rate + " bpm / " + count + " beats / "+time + " s");
+                    break;
+                case HeartRateService.BROADCAST_MONITOR_CONNECT_ATTEMPT:
+                    beatStatus.setText("Attempting connection to monitor");
+                    break;
+                case HeartRateService.BROADCAST_MONITOR_CONNECT_RESULT:
+                    String connectMsg = intent.getStringExtra("msg");
+                    beatStatus.setText("Connection: %s".format(connectMsg ));
+                    break;
             }
         }
     };
 
-    /**
-     * Get the token for use with the syncing.
-     * @return
-     */
-    public String getToken() {
-        String json = null;
-        String token = null;
-
-        try {
-            InputStream is = getAssets().open("token.json");
-            int size = is.available();
-            byte[] buffer = new byte[size];
-            is.read(buffer);
-            is.close();
-            json = new String(buffer, "UTF-8");
-        } catch (IOException ex) {
-            ex.printStackTrace();
-            return null;
-        }
-        try {
-            JSONObject jsonObject = new JSONObject(json);
-            token = jsonObject.getString("token'");
-        } catch (JSONException e) {
-            e.printStackTrace();
-            return null;
-        }
-        return token;
-    }
 
 }

app/src/main/java/com/rubenvandeven/heartbeatstreamer/heartrate/HeartRateService.java

@@ -1,6 +1,8 @@
 package com.rubenvandeven.heartbeatstreamer.heartrate;
 
 import android.app.AlertDialog;
+import android.app.NotificationManager;
+import android.app.PendingIntent;
 import android.app.Service;
 import android.content.DialogInterface;
 import android.content.Intent;
@@ -9,6 +11,7 @@ import android.os.Handler;
 import android.os.HandlerThread;
 import android.os.IBinder;
 import android.os.Looper;
+import android.support.v4.app.NotificationCompat;
 import android.util.Log;
 import android.view.View;
 import android.widget.Toast;
@@ -23,11 +26,19 @@ import com.dsi.ant.plugins.antplus.pccbase.PccReleaseHandle;
 import com.koushikdutta.async.future.Future;
 import com.koushikdutta.async.http.AsyncHttpClient;
 import com.koushikdutta.async.http.WebSocket;
+import com.rubenvandeven.heartbeatstreamer.MainActivity;
 import com.rubenvandeven.heartbeatstreamer.R;
 
+import org.json.JSONException;
+import org.json.JSONObject;
+
+import java.io.IOException;
+import java.io.InputStream;
 import java.math.BigDecimal;
+import java.text.DateFormat;
 import java.text.DecimalFormat;
 import java.text.DecimalFormatSymbols;
+import java.util.Date;
 import java.util.EnumSet;
 
 public class HeartRateService extends Service {
@@ -37,22 +48,51 @@ public class HeartRateService extends Service {
     public static final String BROADCAST_MONITOR_DISCONNECTED = "com.rubenvandeven.heartbeat.broadcast.monitor_stopped";
     public static final String BROADCAST_MONITOR_UNKNOWN = "com.rubenvandeven.heartbeat.broadcast.monitor_unknown";
     public static final String BROADCAST_MONITOR_UPDATE = "com.rubenvandeven.heartbeat.broadcast.monitor_update";
+    public static final String BROADCAST_MONITOR_CONNECT_ATTEMPT = "com.rubenvandeven.heartbeat.broadcast.connect_attempt";
+    public static final String BROADCAST_MONITOR_CONNECT_RESULT = "com.rubenvandeven.heartbeat.broadcast.connect_reslt";
     public static final String BROADCAST_SOCKET_SENT = "com.rubenvandeven.heartbeat.broadcast.socket_sent";
+    public static final String BROADCAST_SERVICE_START = "com.rubenvandeven.heartbeat.broadcast.service_start";
+    public static final String BROADCAST_SERVICE_STOPPED = "com.rubenvandeven.heartbeat.broadcast.service_stopped";
+    public static final String BROADCAST_BEAT = "com.rubenvandeven.heartbeat.broadcast.beat";
+    public static final String ACTION_START = "com.rubenvandeven.heartbeat.service_start";
+    public static final String ACTION_STOP = "com.rubenvandeven.heartbeat.service_stop";
+    public static final int NOTIFICATION_ID = 101;
 
     AsyncScanController<AntPlusHeartRatePcc> hrScanCtrl;
 
     AntPlusHeartRatePcc hrPcc;
     PccReleaseHandle<AntPlusHeartRatePcc> releaseHandle;
-    String lastMsg = "";
+    JSONObject lastMsg = null;
 
     public static boolean isRunning = false;
 
+    NotificationCompat.Builder builder;
+    NotificationManager notificationManager;
+
     @Override
     public void onCreate() {
-        isRunning = true;
+        notificationManager =
+                (NotificationManager) getSystemService(Service.NOTIFICATION_SERVICE);
+
+        setRunning(true);
+
         requestAccessToPcc();
     }
 
+    public void setRunning(boolean running) {
+        if(running == isRunning) {
+            return;
+        }
+        isRunning = running;
+        Intent i;
+        if(running) {
+            i = new Intent(BROADCAST_SERVICE_START);
+        } else {
+            i = new Intent(BROADCAST_SERVICE_STOPPED);
+        }
+        sendBroadcast(i);
+    }
+
     /**
      * Start main thread, request location updates, start synchronization.
      *
@@ -63,7 +103,32 @@ public class HeartRateService extends Service {
      */
     @Override
     public int onStartCommand(Intent intent, int flags, int startId) {
+        if (intent.getAction().equals(ACTION_START)) {
             Log.i(TAG, "Received start id " + startId + ": " + intent);
+            Intent notificationIntent = new Intent(this, MainActivity.class);
+            notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK
+                    | Intent.FLAG_ACTIVITY_CLEAR_TASK);
+            PendingIntent pendingIntent = PendingIntent.getActivity(this, 0,
+                    notificationIntent, 0);
+
+            builder = new NotificationCompat.Builder(this)
+                    .setContentText("Starting")
+                    .setContentTitle("Heartbeat Streamer")
+                    .setSmallIcon(R.drawable.ic_notification)
+                    .setAutoCancel(false)
+                    .setOngoing(true)
+                    .setOnlyAlertOnce(false)
+                    .setContentIntent(pendingIntent)
+                    ;
+
+            startForeground(NOTIFICATION_ID,
+                    builder.build());
+
+        } else if (intent.getAction().equals(ACTION_STOP)) {
+            Log.i(TAG, "Received stop id " + startId + ": " + intent);
+            stopForeground(true);
+            stopSelf();
+        }
         return START_STICKY;
     }
 
@@ -93,24 +158,31 @@ public class HeartRateService extends Service {
                 public void onResultReceived(AntPlusHeartRatePcc result, RequestAccessResult resultCode,
                                              DeviceState initialDeviceState) {
 //                    showDataDisplay("Connecting...");
+                    Intent i = new Intent(BROADCAST_MONITOR_CONNECT_RESULT);
                     switch (resultCode) {
                         case SUCCESS:
+                            i.putExtra("msg", "Success");
                             connectHr(result);
                             break;
                         case CHANNEL_NOT_AVAILABLE:
                             showNotification("Channel Not Available");
+                            i.putExtra("msg", "Channel Not Available");
                             break;
                         case OTHER_FAILURE:
                             showNotification("RequestAccess failed. See logcat for details.");
+                            i.putExtra("msg", "RequestAccess failed. See logcat for details.");
                             break;
                         case USER_CANCELLED:
                             showNotification("Cancelled. Do reset.");
+                            i.putExtra("msg", "Cancelled. Do reset.");
                             break;
                         case UNRECOGNIZED:
                         default:
                             showNotification("Unknown error. Do reset.");
+                            i.putExtra("msg", "unknown error. Do reset.");
                             break;
                     }
+                    sendBroadcast(i);
                 }
             };
 
@@ -138,30 +210,86 @@ public class HeartRateService extends Service {
                 final String textHeartBeatEventTime = df.format(heartBeatEventTime)
                         + ((AntPlusHeartRatePcc.DataState.INITIAL_VALUE.equals(dataState)) ? "*" : "");
 
-                final String msg = String.format("{\"rate\":\"%s\", \"count\":\"%s\", \"time\":\"%s\"}", textHeartRate, textHeartBeatCount, textHeartBeatEventTime);
+                Intent intent = new Intent(BROADCAST_BEAT);
+                intent.putExtra("rate", textHeartRate);
+                intent.putExtra("count", textHeartBeatCount);
+                intent.putExtra("time", textHeartBeatEventTime);
+                sendBroadcast(intent);
 
-                if(msg.contentEquals(lastMsg)) {
+                builder.setContentText(textHeartRate + " bpm");
+                notificationManager.notify(NOTIFICATION_ID, builder.build());
+
+                JSONObject jObjectData = new JSONObject();
+                //                final String msg = String.format("{\"rate\":\"%s\", \"count\":\"%s\", \"time\":\"%s\"}", textHeartRate, textHeartBeatCount, textHeartBeatEventTime);
+                final String msg;
+                try {
+                    jObjectData.put("rate", textHeartRate);
+                    jObjectData.put("count", textHeartBeatCount);
+                    jObjectData.put("time", textHeartBeatEventTime);
+                    jObjectData.put("timestamp", DateFormat.getDateTimeInstance().format(new Date()));
+                    jObjectData.put("token", getToken());
+
+                    msg = jObjectData.toString();
+
+
+                    if(lastMsg != null && lastMsg.getString("time").equals(jObjectData.getString("time"))) {
                         Log.i(TAG, "Skip duplicate");
                         return;
                     }
-                lastMsg = msg;
+                    lastMsg = jObjectData;
 
-                sendResult(msg);
+                    sendResult(jObjectData.toString());
+
+                } catch (JSONException e) {
+                    e.printStackTrace();
+                }
             }
         });
 
     }
 
 
-    private void sendResult(String msg) {
+    String token = null;
-        Log.d(TAG, "Send: " + msg);
+    /**
-        final String m = msg;
+     * Get the token for use with the syncing.
+     * @return
+     */
+    public String getToken() {
+        if(token != null) {
+            return token;
+        }
+
+        String json = null;
+        try {
+            InputStream is = getAssets().open("token.json");
+            int size = is.available();
+            byte[] buffer = new byte[size];
+            is.read(buffer);
+            is.close();
+            json = new String(buffer, "UTF-8");
+        } catch (IOException ex) {
+            ex.printStackTrace();
+            return null;
+        }
+        try {
+            JSONObject jsonObject = new JSONObject(json);
+            token = jsonObject.getString("token'");
+        } catch (JSONException e) {
+            e.printStackTrace();
+            return null;
+        }
+        return token;
+    }
+
+
+    private void sendResult(final String m) {
+        Log.d(TAG, "Send: " + m);
         Future<WebSocket> fws = AsyncHttpClient.getDefaultInstance().websocket("ws://heartbeat.rubenvandeven.com:8888/ws", "my-protocol", new AsyncHttpClient.WebSocketConnectCallback() {
             @Override
             public void onCompleted(Exception ex, final WebSocket webSocket) {
                 if (ex != null) {
                     ex.printStackTrace();
-                    // TODO: retry in 30s - ie. after internet loss
+                    // TODO: store for later sync
                     return;
                 }
                 webSocket.send(m);
@@ -188,10 +316,21 @@ public class HeartRateService extends Service {
      * wait to reconnect to dead HR-monitor
      */
     protected void waitAndReconnect() {
-        //TODO:
         Log.d(TAG, "Wait & reconnect");
+
+        if(hrPcc != null) {
+            hrPcc.subscribeHeartRateDataEvent(null);
+        }
+
+        new android.os.Handler().postDelayed(
+            new Runnable() {
+                public void run() {
+                    Log.i(TAG, "Attempt reconnect");
                     requestAccessToPcc();
                 }
+            },
+        20000); // 20 sec delay for connection
+    }
 
     /**
      * Requests the ANT+ device
@@ -201,6 +340,7 @@ public class HeartRateService extends Service {
         if(hrPcc != null) {
             hrPcc.subscribeHeartRateDataEvent(null);
         }
+        sendBroadcast( new Intent(BROADCAST_MONITOR_CONNECT_ATTEMPT) );
         releaseHandle = AntPlusHeartRatePcc.requestAccess(this, 4818, 0, resultReceiver, stateChangeReceiver);
     }
 
@@ -216,7 +356,7 @@ public class HeartRateService extends Service {
         {
             releaseHandle.close();
         }
-        isRunning = false;
+        setRunning(false);
         super.onDestroy();
     }
 

app/src/main/res/drawable/ic_launcher_foreground.xml

@@ -0,0 +1,83 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="108dp"
+        android:height="108dp"
+        android:viewportWidth="757.16064"
+        android:viewportHeight="757.16064">
+    <group android:translateX="-101.41968"
+            android:translateY="-101.41968">
+      <path
+          android:pathData="M733.8,717.5h-507c-5.7,0 -10.4,-4.7 -10.4,-10.4v-31.3c0,-5.7 4.7,-10.4 10.4,-10.4h507c5.7,0 10.4,4.7 10.4,10.4v31.3C744.2,712.9 739.6,717.5 733.8,717.5z"
+          android:fillColor="#E6E6E6"/>
+      <path
+          android:pathData="M786.3,681H173.7c-13.5,0 -24.5,-10.9 -24.5,-24.5V266.9c0,-13.5 10.9,-24.5 24.5,-24.5h612.6c13.5,0 24.5,10.9 24.5,24.5v389.6C810.7,670 799.8,681 786.3,681z"
+          android:fillColor="#FFFFFF"/>
+      <path
+          android:pathData="M203,289.3h554v304h-554z"
+          android:fillColor="#4B535C"/>
+      <path
+          android:pathData="M223.4,309.7l533.6,0l0,-20.4l-554,0l0,304l20.4,0z"
+          android:fillColor="#333333"/>
+      <path
+          android:pathData="M206.4,620.7h83.9v23.3h-83.9z"
+          android:fillColor="#333333"/>
+      <path
+          android:pathData="M313.3,620.7h83.9v23.3h-83.9z"
+          android:fillColor="#333333"/>
+      <path
+          android:pathData="M305,309.7L305,593.3"
+          android:strokeAlpha="0.12"
+          android:strokeWidth="4.8683"
+          android:fillColor="#00000000"
+          android:strokeColor="#FFFFFF"
+          android:fillAlpha="0.12"/>
+      <path
+          android:pathData="M417.7,309.7L417.7,593.3"
+          android:strokeAlpha="0.12"
+          android:strokeWidth="4.8683"
+          android:fillColor="#00000000"
+          android:strokeColor="#FFFFFF"
+          android:fillAlpha="0.12"/>
+      <path
+          android:pathData="M530.5,309.7L530.5,593.3"
+          android:strokeAlpha="0.12"
+          android:strokeWidth="4.8683"
+          android:fillColor="#00000000"
+          android:strokeColor="#FFFFFF"
+          android:fillAlpha="0.12"/>
+      <path
+          android:pathData="M643.2,309.7L643.2,593.3"
+          android:strokeAlpha="0.12"
+          android:strokeWidth="4.8683"
+          android:fillColor="#00000000"
+          android:strokeColor="#FFFFFF"
+          android:fillAlpha="0.12"/>
+      <path
+          android:pathData="M223.4,392.4L757,392.4"
+          android:strokeAlpha="0.12"
+          android:strokeWidth="4.8683"
+          android:fillColor="#00000000"
+          android:strokeColor="#FFFFFF"
+          android:fillAlpha="0.12"/>
+      <path
+          android:pathData="M223.4,485.1L757,485.1"
+          android:strokeAlpha="0.12"
+          android:strokeWidth="4.8683"
+          android:fillColor="#00000000"
+          android:strokeColor="#FFFFFF"
+          android:fillAlpha="0.12"/>
+      <path
+          android:pathData="M744.2,632.3m-11.7,0a11.7,11.7 0,1 1,23.4 0a11.7,11.7 0,1 1,-23.4 0"
+          android:fillColor="#C1272D"/>
+      <path
+          android:pathData="M704.7,632.3m-11.7,0a11.7,11.7 0,1 1,23.4 0a11.7,11.7 0,1 1,-23.4 0"
+          android:fillColor="#8CC63F"/>
+      <path
+          android:pathData="M665.1,632.3m-11.7,0a11.7,11.7 0,1 1,23.4 0a11.7,11.7 0,1 1,-23.4 0"
+          android:fillColor="#C1272D"/>
+      <path
+          android:pathData="M201.8,465.9l106.5,0l51.6,-85.3l37.8,139.6l52.2,-110.6l33.8,68.5l46.8,-126.5l46.9,142.5l45.4,-88.7l28.2,62.2l104.9,0"
+          android:strokeWidth="9.7366"
+          android:fillColor="#00000000"
+          android:strokeColor="#12A88B"/>
+    </group>
+</vector>

app/src/main/res/layout/activity_main.xml

@@ -1,19 +1,46 @@
 <?xml version="1.0" encoding="utf-8"?>
-<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:orientation="vertical"
     tools:context=".MainActivity">
 
     <TextView
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
         android:id="@+id/status_msg"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
         android:text="..."
         app:layout_constraintBottom_toBottomOf="parent"
         app:layout_constraintLeft_toLeftOf="parent"
         app:layout_constraintRight_toRightOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
-</android.support.constraint.ConstraintLayout>
+    <TextView
+        android:id="@+id/beat_status"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:gravity="center"
+        android:text="..."
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintRight_toRightOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
+    <LinearLayout
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:orientation="horizontal">
+
+        <Button
+            android:id="@+id/service_button"
+            android:layout_width="0dp"
+            android:layout_height="wrap_content"
+            android:layout_weight="1"
+            android:text="@string/service_start" />
+
+    </LinearLayout>
+
+</LinearLayout>

app/src/main/res/mipmap-anydpi-v26/ic_launcher.xml

@@ -1,5 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
-<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
+<adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">`
-    <background android:drawable="@drawable/ic_launcher_background" />
     <foreground android:drawable="@drawable/ic_launcher_foreground"/>
 </adaptive-icon>

app/src/main/res/mipmap-anydpi-v26/ic_launcher_round.xml

@@ -1,5 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
-    <background android:drawable="@drawable/ic_launcher_background" />
     <foreground android:drawable="@drawable/ic_launcher_foreground"/>
 </adaptive-icon>

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

@@ -22,4 +22,7 @@
         <item>Bike Speed</item>
         <item>Stride-based Speed and Distance</item>
     </string-array>
+    <string name="service_start">Start service</string>
+    <string name="service_stop">Stop service</string>
+
 </resources>