diff --git a/.gitignore b/.gitignore
index 34918d5..be5c1dd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,12 @@ build
 *.iml
 /gradle
 local.properties
+/android/app/src/main/.classpath
+/android/app/src/main/.project
+/android/app/src/main/.settings
+/android/app/src/main/bin
+/android/app/src/main/gen
+/android/app/src/main/project.properties
 /android/app/src/main/res/raw/build.txt
 /artwork
 /android/captures
diff --git a/android/app/build.gradle b/android/app/build.gradle
index dd1cb10..756467b 100644
--- a/android/app/build.gradle
+++ b/android/app/build.gradle
@@ -26,6 +26,7 @@ android {
 
     lintOptions {
         disable 'MissingTranslation'
+        abortOnError false
     }
 
     testOptions {
@@ -41,7 +42,7 @@ buildscript {
     }
     dependencies {
         // replace with the current version of the Android plugin
-        classpath 'com.android.tools.build:gradle:2.2.0'
+        classpath 'com.android.tools.build:gradle:2.3.0'
         // the latest version of the android-apt plugin
         classpath 'com.neenbedankt.gradle.plugins:android-apt:1.8'
     }
diff --git a/android/app/src/main/AndroidManifest.xml b/android/app/src/main/AndroidManifest.xml
index e81aed9..2399daf 100644
--- a/android/app/src/main/AndroidManifest.xml
+++ b/android/app/src/main/AndroidManifest.xml
@@ -14,6 +14,7 @@
     <uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />
     <uses-permission android:name="android.permission.WAKE_LOCK" />
     <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS" />
+    <uses-sdk android:minSdkVersion="13" android:targetSdkVersion="23"/>
 
     <application
         android:name="org.openbmap.RadiobeaconApplication"
diff --git a/android/app/src/main/java/org/openbmap/services/MasterBrainService.java b/android/app/src/main/java/org/openbmap/services/MasterBrainService.java
index ac5fb83..bc78c9f 100644
--- a/android/app/src/main/java/org/openbmap/services/MasterBrainService.java
+++ b/android/app/src/main/java/org/openbmap/services/MasterBrainService.java
@@ -209,7 +209,7 @@ public int onStartCommand(Intent intent, int flags, int startId) {
     @Override
     public void onDestroy() {
         unregisterReceiver();
-        hideNotification();
+        stopForeground(true);
         EventBus.getDefault().unregister(this);
 
         unbindAll();
@@ -331,7 +331,38 @@ private void startTracking(final int session) {
             mSession = setupNewSession();
         }
         bindAll();
-        showNotification();
+
+        PendingIntent intent = PendingIntent.getActivity(this, 0, new Intent(this, TabHostActivity.class), 0);
+
+        // Set the icon, scrolling text and timestamp
+        //final Notification notification = new Notification(R.drawable.icon_greyed_25x25, getString(R.string.notification_caption),
+        //        System.currentTimeMillis());
+        //notification.setLatestEventInfo(this, getString(R.string.app_name), getString(R.string.notification_caption), contentIntent);
+
+        // Set the info for the views that show in the notification panel.
+
+        Notification notification;
+        if (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN) {
+            Notification.Builder builder = new Notification.Builder(this.getApplicationContext());
+            builder.setAutoCancel(false);
+            builder.setContentTitle(getString(R.string.app_name));
+            builder.setContentText(getString(R.string.notification_caption));
+            builder.setSmallIcon(R.drawable.icon_greyed_25x25);
+            builder.setContentIntent(intent);
+            builder.setOngoing(true);
+            notification = builder.build();
+        } else {
+            NotificationCompat.Builder compat = new NotificationCompat.Builder(getApplicationContext());
+            compat.setAutoCancel(false);
+            compat.setContentTitle(getString(R.string.app_name));
+            compat.setContentText(getString(R.string.notification_caption));
+            compat.setSmallIcon(R.drawable.icon_greyed_25x25);
+            compat.setContentIntent(intent);
+            compat.setOngoing(true);
+            notification = compat.build();
+        }
+
+        startForeground(NOTIFICATION_ID, notification);
     }
 
     /**
@@ -354,7 +385,7 @@ private void stopTracking(int reason) {
             }
         }
 
-        hideNotification();
+        stopForeground(true);
     }
 
     /**
@@ -448,42 +479,6 @@ private void updateDatabase() {
      * Shows Android notification while this service is running.
      */
     private void showNotification() {
-        PendingIntent intent = PendingIntent.getActivity(this, 0, new Intent(this, TabHostActivity.class), 0);
-
-        // Set the icon, scrolling text and timestamp
-        //final Notification notification = new Notification(R.drawable.icon_greyed_25x25, getString(R.string.notification_caption),
-        //        System.currentTimeMillis());
-        //notification.setLatestEventInfo(this, getString(R.string.app_name), getString(R.string.notification_caption), contentIntent);
-
-        // Set the info for the views that show in the notification panel.
-
-
-        if (VERSION.SDK_INT >= VERSION_CODES.JELLY_BEAN) {
-            Notification.Builder builder = new Notification.Builder(this.getApplicationContext());
-            builder.setAutoCancel(false);
-            builder.setContentTitle(getString(R.string.app_name));
-            builder.setContentText(getString(R.string.notification_caption));
-            builder.setSmallIcon(R.drawable.icon_greyed_25x25);
-            builder.setContentIntent(intent);
-            builder.setOngoing(true);
-            mNotificationManager.notify(NOTIFICATION_ID, builder.build());
-        } else if (VERSION.SDK_INT < VERSION_CODES.JELLY_BEAN) {
-            NotificationCompat.Builder compat = new NotificationCompat.Builder(getApplicationContext());
-            compat.setAutoCancel(false);
-            compat.setContentTitle(getString(R.string.app_name));
-            compat.setContentText(getString(R.string.notification_caption));
-            compat.setSmallIcon(R.drawable.icon_greyed_25x25);
-            compat.setContentIntent(intent);
-            compat.setOngoing(true);
-            mNotificationManager.notify(NOTIFICATION_ID, compat.build());
-        }
-    }
-
-    /**
-     * Hides Android notification
-     */
-    private void hideNotification() {
-        mNotificationManager.cancel(NOTIFICATION_ID);
     }
 
 }
diff --git a/android/app/src/main/java/org/openbmap/services/wireless/WirelessLoggerService.java b/android/app/src/main/java/org/openbmap/services/wireless/WirelessLoggerService.java
index e77b303..511e9ef 100644
--- a/android/app/src/main/java/org/openbmap/services/wireless/WirelessLoggerService.java
+++ b/android/app/src/main/java/org/openbmap/services/wireless/WirelessLoggerService.java
@@ -355,7 +355,7 @@ public void onSignalStrengthsChanged(final SignalStrength signalStrength) {
                 // TODO we need a timestamp for signal strength
                 try {
                     mCdmaStrengthDbm = signalStrength.getCdmaDbm();
-                    mCdmaEcIo = signalStrength.getmCdmaEcIo();
+                    mCdmaEcIo = signalStrength.getCdmaEcio();
                 } catch (final Exception e) {
                     Log.e(TAG, e.toString(), e);
                 }
@@ -368,7 +368,7 @@ public void onSignalStrengthsChanged(final SignalStrength signalStrength) {
                 }
 
                 try {
-                    mGsmBitErrorRate = signalStrength.getmGsmBitErrorRate();
+                    mGsmBitErrorRate = signalStrength.getGsmBitErrorRate();
                     mGsmStrengthAsu = signalStrength.getGsmSignalStrength();
                     mGsmStrengthDbm = -113 + 2 * mGsmStrengthAsu; // conversion ASU in dBm
                 } catch (final Exception e) {
diff --git a/android/gradlew b/android/gradlew
old mode 100644
new mode 100755