diff --git a/src/main/java/de/dennisguse/opentracks/MarkerDetailActivity.java b/src/main/java/de/dennisguse/opentracks/MarkerDetailActivity.java
index cf4cce204..155aab707 100644
--- a/src/main/java/de/dennisguse/opentracks/MarkerDetailActivity.java
+++ b/src/main/java/de/dennisguse/opentracks/MarkerDetailActivity.java
@@ -109,12 +109,7 @@ public class MarkerDetailActivity extends AbstractActivity implements DeleteMark
 
     @Override
     public void onDeleteMarkerDone() {
-        runOnUiThread(new Runnable() {
-            @Override
-            public void run() {
-                finish();
-            }
-        });
+        runOnUiThread(this::finish);
     }
 
     /**
diff --git a/src/main/java/de/dennisguse/opentracks/MarkerListActivity.java b/src/main/java/de/dennisguse/opentracks/MarkerListActivity.java
index 0785ec74a..b585e5fc5 100644
--- a/src/main/java/de/dennisguse/opentracks/MarkerListActivity.java
+++ b/src/main/java/de/dennisguse/opentracks/MarkerListActivity.java
@@ -82,12 +82,7 @@ public class MarkerListActivity extends AbstractActivity implements DeleteMarker
                 recordingTrackPaused = PreferencesUtils.isRecordingTrackPaused(MarkerListActivity.this);
             }
             if (key != null) {
-                runOnUiThread(new Runnable() {
-                    @Override
-                    public void run() {
-                        MarkerListActivity.this.invalidateOptionsMenu();
-                    }
-                });
+                runOnUiThread(() -> MarkerListActivity.this.invalidateOptionsMenu());
             }
         }
     };
diff --git a/src/main/java/de/dennisguse/opentracks/SearchListActivity.java b/src/main/java/de/dennisguse/opentracks/SearchListActivity.java
index 71679be72..6b0b8a2c9 100644
--- a/src/main/java/de/dennisguse/opentracks/SearchListActivity.java
+++ b/src/main/java/de/dennisguse/opentracks/SearchListActivity.java
@@ -153,12 +153,7 @@ public class SearchListActivity extends AbstractListActivity implements DeleteMa
                 recordingTrackPaused = PreferencesUtils.isRecordingTrackPaused(SearchListActivity.this);
             }
             if (key != null) {
-                runOnUiThread(new Runnable() {
-                    @Override
-                    public void run() {
-                        arrayAdapter.notifyDataSetChanged();
-                    }
-                });
+                runOnUiThread(() -> arrayAdapter.notifyDataSetChanged());
             }
         }
     };
@@ -346,12 +341,9 @@ public class SearchListActivity extends AbstractListActivity implements DeleteMa
         final List<Map<String, Object>> displayResults = prepareResultsforDisplay(scoredResults);
 
         // Use the UI thread to display the results
-        runOnUiThread(new Runnable() {
-            @Override
-            public void run() {
-                arrayAdapter.clear();
-                arrayAdapter.addAll(displayResults);
-            }
+        runOnUiThread(() -> {
+            arrayAdapter.clear();
+            arrayAdapter.addAll(displayResults);
         });
     }
 
@@ -448,12 +440,7 @@ public class SearchListActivity extends AbstractListActivity implements DeleteMa
 
     @Override
     public void onDeleteMarkerDone() {
-        runOnUiThread(new Runnable() {
-            @Override
-            public void run() {
-                handleIntent(getIntent());
-            }
-        });
+        runOnUiThread(() -> handleIntent(getIntent()));
     }
 
     @Override
@@ -463,11 +450,6 @@ public class SearchListActivity extends AbstractListActivity implements DeleteMa
 
     @Override
     protected void onDeleted() {
-        runOnUiThread(new Runnable() {
-            @Override
-            public void run() {
-                handleIntent(getIntent());
-            }
-        });
+        runOnUiThread(() -> handleIntent(getIntent()));
     }
 }
diff --git a/src/main/java/de/dennisguse/opentracks/TrackListActivity.java b/src/main/java/de/dennisguse/opentracks/TrackListActivity.java
index 30a1bfb9d..acdc786f7 100644
--- a/src/main/java/de/dennisguse/opentracks/TrackListActivity.java
+++ b/src/main/java/de/dennisguse/opentracks/TrackListActivity.java
@@ -143,14 +143,11 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
                 recordingTrackPaused = PreferencesUtils.isRecordingTrackPaused(TrackListActivity.this);
             }
             if (key != null) {
-                runOnUiThread(new Runnable() {
-                    @Override
-                    public void run() {
-                        TrackListActivity.this.invalidateOptionsMenu();
-                        LoaderManager.getInstance(TrackListActivity.this).restartLoader(0, null, loaderCallbacks);
-                        boolean isRecording = PreferencesUtils.isRecording(recordingTrackId);
-                        trackController.update(isRecording, recordingTrackPaused);
-                    }
+                runOnUiThread(() -> {
+                    TrackListActivity.this.invalidateOptionsMenu();
+                    LoaderManager.getInstance(TrackListActivity.this).restartLoader(0, null, loaderCallbacks);
+                    boolean isRecording = PreferencesUtils.isRecording(recordingTrackId);
+                    trackController.update(isRecording, recordingTrackPaused);
                 });
             }
         }
@@ -177,12 +174,7 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
             /*
              * After binding changes (e.g., becomes available), update the total time in trackController.
              */
-            runOnUiThread(new Runnable() {
-                @Override
-                public void run() {
-                    trackController.update(PreferencesUtils.isRecording(recordingTrackId), recordingTrackPaused);
-                }
-            });
+            runOnUiThread(() -> trackController.update(PreferencesUtils.isRecording(recordingTrackId), recordingTrackPaused));
 
             if (!startGps) {
                 return;
diff --git a/src/main/java/de/dennisguse/opentracks/TrackRecordedActivity.java b/src/main/java/de/dennisguse/opentracks/TrackRecordedActivity.java
index 901a8981a..07983584a 100644
--- a/src/main/java/de/dennisguse/opentracks/TrackRecordedActivity.java
+++ b/src/main/java/de/dennisguse/opentracks/TrackRecordedActivity.java
@@ -16,7 +16,6 @@
 
 package de.dennisguse.opentracks;
 
-import android.app.ActivityOptions;
 import android.content.Intent;
 import android.os.Bundle;
 import android.util.Log;
@@ -226,12 +225,7 @@ public class TrackRecordedActivity extends AbstractListActivity implements Choos
 
     @Override
     protected void onDeleted() {
-        runOnUiThread(new Runnable() {
-            @Override
-            public void run() {
-                finish();
-            }
-        });
+        runOnUiThread(this::finish);
     }
 
     /**
@@ -259,7 +253,6 @@ public class TrackRecordedActivity extends AbstractListActivity implements Choos
         if (trackId == -1L) {
             Log.e(TAG, "TrackDetailActivity needs EXTRA_TRACK_ID.");
             finish();
-            return;
         }
     }
 
diff --git a/src/main/java/de/dennisguse/opentracks/TrackRecordingActivity.java b/src/main/java/de/dennisguse/opentracks/TrackRecordingActivity.java
index 8df8041f2..08397b623 100644
--- a/src/main/java/de/dennisguse/opentracks/TrackRecordingActivity.java
+++ b/src/main/java/de/dennisguse/opentracks/TrackRecordingActivity.java
@@ -1,6 +1,5 @@
 package de.dennisguse.opentracks;
 
-import android.app.ActivityOptions;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
@@ -68,12 +67,7 @@ public class TrackRecordingActivity extends AbstractActivity implements ChooseAc
         @Override
         public void run() {
             // After binding changes (is available), update the total time in trackController.
-            runOnUiThread(new Runnable() {
-                @Override
-                public void run() {
-                    trackController.update(true, recordingTrackPaused);
-                }
-            });
+            runOnUiThread(() -> trackController.update(true, recordingTrackPaused));
 
             if (recordingTrackId == -1L) {
                 TrackRecordingServiceInterface service = trackRecordingServiceConnection.getServiceIfBound();
@@ -130,12 +124,9 @@ public class TrackRecordingActivity extends AbstractActivity implements ChooseAc
 
             if (key == null) return;
 
-            runOnUiThread(new Runnable() {
-                @Override
-                public void run() {
-                    TrackRecordingActivity.this.invalidateOptionsMenu();
-                    trackController.update(true, recordingTrackPaused);
-                }
+            runOnUiThread(() -> {
+                TrackRecordingActivity.this.invalidateOptionsMenu();
+                trackController.update(true, recordingTrackPaused);
             });
         }
     };
diff --git a/src/main/java/de/dennisguse/opentracks/content/TrackDataHub.java b/src/main/java/de/dennisguse/opentracks/content/TrackDataHub.java
index 053123039..ca6f676d9 100644
--- a/src/main/java/de/dennisguse/opentracks/content/TrackDataHub.java
+++ b/src/main/java/de/dennisguse/opentracks/content/TrackDataHub.java
@@ -144,12 +144,9 @@ public class TrackDataHub implements SharedPreferences.OnSharedPreferenceChangeL
 
         PreferencesUtils.register(context, this);
         onSharedPreferenceChanged(null, null);
-        runInHandlerThread(new Runnable() {
-            @Override
-            public void run() {
-                if (started) {
-                    loadDataForAll();
-                }
+        runInHandlerThread(() -> {
+            if (started) {
+                loadDataForAll();
             }
         });
     }
@@ -178,16 +175,13 @@ public class TrackDataHub implements SharedPreferences.OnSharedPreferenceChangeL
     }
 
     public void loadTrack(final long trackId) {
-        runInHandlerThread(new Runnable() {
-            @Override
-            public void run() {
-                if (trackId == selectedTrackId) {
-                    Log.i(TAG, "Not reloading track " + trackId);
-                    return;
-                }
-                selectedTrackId = trackId;
-                loadDataForAll();
+        runInHandlerThread(() -> {
+            if (trackId == selectedTrackId) {
+                Log.i(TAG, "Not reloading track " + trackId);
+                return;
             }
+            selectedTrackId = trackId;
+            loadDataForAll();
         });
     }
 
@@ -197,13 +191,10 @@ public class TrackDataHub implements SharedPreferences.OnSharedPreferenceChangeL
      * @param trackDataListener the track data listener
      */
     public void registerTrackDataListener(final TrackDataListener trackDataListener, final boolean tracksTable, final boolean waypointsTable, final boolean trackPointsTable_SampleIn, final boolean trackPointsTable_SampleOut) {
-        runInHandlerThread(new Runnable() {
-            @Override
-            public void run() {
-                trackDataManager.registerTrackDataListener(trackDataListener, tracksTable, waypointsTable, trackPointsTable_SampleIn, trackPointsTable_SampleOut);
-                if (started) {
-                    loadDataForListener(trackDataListener);
-                }
+        runInHandlerThread(() -> {
+            trackDataManager.registerTrackDataListener(trackDataListener, tracksTable, waypointsTable, trackPointsTable_SampleIn, trackPointsTable_SampleOut);
+            if (started) {
+                loadDataForListener(trackDataListener);
             }
         });
     }
@@ -214,12 +205,7 @@ public class TrackDataHub implements SharedPreferences.OnSharedPreferenceChangeL
      * @param trackDataListener the track data listener
      */
     public void unregisterTrackDataListener(final TrackDataListener trackDataListener) {
-        runInHandlerThread(new Runnable() {
-            @Override
-            public void run() {
-                trackDataManager.unregisterTrackDataListener(trackDataListener);
-            }
-        });
+        runInHandlerThread(() -> trackDataManager.unregisterTrackDataListener(trackDataListener));
     }
 
     /**
@@ -238,15 +224,12 @@ public class TrackDataHub implements SharedPreferences.OnSharedPreferenceChangeL
 
     @Override
     public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, final String key) {
-        runInHandlerThread(new Runnable() {
-            @Override
-            public void run() {
-                if (PreferencesUtils.isKey(context, R.string.recording_track_id_key, key)) {
-                    recordingTrackId = PreferencesUtils.getRecordingTrackId(context);
-                }
-                if (PreferencesUtils.isKey(context, R.string.recording_track_paused_key, key)) {
-                    recordingTrackPaused = PreferencesUtils.isRecordingTrackPaused(context);
-                }
+        runInHandlerThread(() -> {
+            if (PreferencesUtils.isKey(context, R.string.recording_track_id_key, key)) {
+                recordingTrackId = PreferencesUtils.getRecordingTrackId(context);
+            }
+            if (PreferencesUtils.isKey(context, R.string.recording_track_paused_key, key)) {
+                recordingTrackPaused = PreferencesUtils.isRecordingTrackPaused(context);
             }
         });
     }
@@ -289,7 +272,7 @@ public class TrackDataHub implements SharedPreferences.OnSharedPreferenceChangeL
             if (isOnlyListener) {
                 resetSamplingState();
             }
-            Set<TrackDataListener> sampledOutListeners = hasSampledOut ? trackDataListeners : Collections.<TrackDataListener>emptySet();
+            Set<TrackDataListener> sampledOutListeners = hasSampledOut ? trackDataListeners : Collections.emptySet();
             notifyTrackPointsTableUpdate(isOnlyListener, trackDataListeners, sampledOutListeners);
         }
 
diff --git a/src/main/java/de/dennisguse/opentracks/fragments/ChartFragment.java b/src/main/java/de/dennisguse/opentracks/fragments/ChartFragment.java
index 03af17e78..cedd9f674 100644
--- a/src/main/java/de/dennisguse/opentracks/fragments/ChartFragment.java
+++ b/src/main/java/de/dennisguse/opentracks/fragments/ChartFragment.java
@@ -90,12 +90,9 @@ public class ChartFragment extends Fragment implements TrackDataListener {
                 boolean metricUnits = PreferencesUtils.isMetricUnits(getContext());
                 if (metricUnits != chartView.getMetricUnits()) {
                     chartView.setMetricUnits(metricUnits);
-                    runOnUiThread(new Runnable() {
-                        @Override
-                        public void run() {
-                            if (isResumed()) {
-                                chartView.requestLayout();
-                            }
+                    runOnUiThread(() -> {
+                        if (isResumed()) {
+                            chartView.requestLayout();
                         }
                     });
                 }
@@ -106,12 +103,9 @@ public class ChartFragment extends Fragment implements TrackDataListener {
                     chartView.setReportSpeed(reportSpeed);
                     chartView.applyReportSpeed();
 
-                    runOnUiThread(new Runnable() {
-                        @Override
-                        public void run() {
-                            if (isResumed()) {
-                                chartView.requestLayout();
-                            }
+                    runOnUiThread(() -> {
+                        if (isResumed()) {
+                            chartView.requestLayout();
                         }
                     });
                 }
@@ -214,12 +208,9 @@ public class ChartFragment extends Fragment implements TrackDataListener {
             trackStatisticsUpdater = startTime != -1L ? new TrackStatisticsUpdater(startTime) : null;
             pendingPoints.clear();
             chartView.reset();
-            runOnUiThread(new Runnable() {
-                @Override
-                public void run() {
-                    if (isResumed()) {
-                        chartView.resetScroll();
-                    }
+            runOnUiThread(() -> {
+                if (isResumed()) {
+                    chartView.resetScroll();
                 }
             });
         }
diff --git a/src/main/java/de/dennisguse/opentracks/fragments/DeleteMarkerDialogFragment.java b/src/main/java/de/dennisguse/opentracks/fragments/DeleteMarkerDialogFragment.java
index 3de0ec2c2..f0e19dad7 100644
--- a/src/main/java/de/dennisguse/opentracks/fragments/DeleteMarkerDialogFragment.java
+++ b/src/main/java/de/dennisguse/opentracks/fragments/DeleteMarkerDialogFragment.java
@@ -80,15 +80,12 @@ public class DeleteMarkerDialogFragment extends DialogFragment {
                 fragmentActivity, titleId, getString(messageId), new DialogInterface.OnClickListener() {
                     @Override
                     public void onClick(DialogInterface dialog, int which) {
-                        new Thread(new Runnable() {
-                            @Override
-                            public void run() {
-                                ContentProviderUtils contentProviderUtils = new ContentProviderUtils(fragmentActivity);
-                                for (long markerId : markerIds) {
-                                    contentProviderUtils.deleteWaypoint(getContext(), markerId);
-                                }
-                                caller.onDeleteMarkerDone();
+                        new Thread(() -> {
+                            ContentProviderUtils contentProviderUtils = new ContentProviderUtils(fragmentActivity);
+                            for (long markerId : markerIds) {
+                                contentProviderUtils.deleteWaypoint(getContext(), markerId);
                             }
+                            caller.onDeleteMarkerDone();
                         }).start();
                     }
                 });
diff --git a/src/main/java/de/dennisguse/opentracks/fragments/StatisticsRecordedFragment.java b/src/main/java/de/dennisguse/opentracks/fragments/StatisticsRecordedFragment.java
index 0f50feed0..4d11df999 100644
--- a/src/main/java/de/dennisguse/opentracks/fragments/StatisticsRecordedFragment.java
+++ b/src/main/java/de/dennisguse/opentracks/fragments/StatisticsRecordedFragment.java
@@ -59,12 +59,9 @@ public class StatisticsRecordedFragment extends Fragment implements TrackDataLis
         public void onSharedPreferenceChanged(SharedPreferences preferences, String key) {
             if (PreferencesUtils.isKey(getContext(), R.string.stats_units_key, key) || PreferencesUtils.isKey(getContext(), R.string.stats_rate_key, key)) {
                 if (isResumed()) {
-                    getActivity().runOnUiThread(new Runnable() {
-                        @Override
-                        public void run() {
-                            if (isResumed()) {
-                                updateUI();
-                            }
+                    getActivity().runOnUiThread(() -> {
+                        if (isResumed()) {
+                            updateUI();
                         }
                     });
                 }
@@ -195,14 +192,11 @@ public class StatisticsRecordedFragment extends Fragment implements TrackDataLis
     @Override
     public void onTrackUpdated(final Track track) {
         if (isResumed()) {
-            getActivity().runOnUiThread(new Runnable() {
-                @Override
-                public void run() {
-                    if (isResumed()) {
-                        trackStatistics = track != null ? track.getTrackStatistics() : null;
-                        category = track != null ? track.getCategory() : "";
-                        updateUI();
-                    }
+            getActivity().runOnUiThread(() -> {
+                if (isResumed()) {
+                    trackStatistics = track != null ? track.getTrackStatistics() : null;
+                    category = track != null ? track.getCategory() : "";
+                    updateUI();
                 }
             });
         }
diff --git a/src/main/java/de/dennisguse/opentracks/fragments/StatisticsRecordingFragment.java b/src/main/java/de/dennisguse/opentracks/fragments/StatisticsRecordingFragment.java
index 2a1170d39..5cdcc55b7 100644
--- a/src/main/java/de/dennisguse/opentracks/fragments/StatisticsRecordingFragment.java
+++ b/src/main/java/de/dennisguse/opentracks/fragments/StatisticsRecordingFragment.java
@@ -68,12 +68,9 @@ public class StatisticsRecordingFragment extends Fragment implements TrackDataLi
         public void onSharedPreferenceChanged(SharedPreferences preferences, String key) {
             if (PreferencesUtils.isKey(getContext(), R.string.stats_units_key, key) || PreferencesUtils.isKey(getContext(), R.string.stats_rate_key, key)) {
                 if (isResumed()) {
-                    getActivity().runOnUiThread(new Runnable() {
-                        @Override
-                        public void run() {
-                            if (isResumed()) {
-                                updateUI();
-                            }
+                    getActivity().runOnUiThread(() -> {
+                        if (isResumed()) {
+                            updateUI();
                         }
                     });
                 }
@@ -308,14 +305,11 @@ public class StatisticsRecordingFragment extends Fragment implements TrackDataLi
     @Override
     public void onTrackUpdated(final Track track) {
         if (isResumed()) {
-            getActivity().runOnUiThread(new Runnable() {
-                @Override
-                public void run() {
-                    if (isResumed()) {
-                        lastTrackStatistics = track != null ? track.getTrackStatistics() : null;
-                        category = track != null ? track.getCategory() : "";
-                        updateUI();
-                    }
+            getActivity().runOnUiThread(() -> {
+                if (isResumed()) {
+                    lastTrackStatistics = track != null ? track.getTrackStatistics() : null;
+                    category = track != null ? track.getCategory() : "";
+                    updateUI();
                 }
             });
         }
@@ -339,24 +333,21 @@ public class StatisticsRecordingFragment extends Fragment implements TrackDataLi
     @Override
     public void onNewTrackPointsDone() {
         if (isResumed()) {
-            getActivity().runOnUiThread(new Runnable() {
-                @Override
-                public void run() {
-                    if (isResumed()) {
-                        if (!isSelectedTrackRecording() || isSelectedTrackPaused()) {
+            getActivity().runOnUiThread(() -> {
+                if (isResumed()) {
+                    if (!isSelectedTrackRecording() || isSelectedTrackPaused()) {
+                        lastTrackPoint = null;
+                    }
+
+                    if (lastTrackPoint != null) {
+                        boolean hasFix = !LocationUtils.isLocationOld(lastTrackPoint.getLocation());
+                        boolean hasGoodFix = TrackPointUtils.fulfillsAccuracy(lastTrackPoint, recordingGpsAccuracy);
+
+                        if (!hasFix || !hasGoodFix) {
                             lastTrackPoint = null;
                         }
-
-                        if (lastTrackPoint != null) {
-                            boolean hasFix = !LocationUtils.isLocationOld(lastTrackPoint.getLocation());
-                            boolean hasGoodFix = TrackPointUtils.fulfillsAccuracy(lastTrackPoint, recordingGpsAccuracy);
-
-                            if (!hasFix || !hasGoodFix) {
-                                lastTrackPoint = null;
-                            }
-                        }
-                        setLocationValues();
                     }
+                    setLocationValues();
                 }
             });
         }
diff --git a/src/main/java/de/dennisguse/opentracks/services/TrackRecordingService.java b/src/main/java/de/dennisguse/opentracks/services/TrackRecordingService.java
index 1c1d3d0bd..80f58c82d 100644
--- a/src/main/java/de/dennisguse/opentracks/services/TrackRecordingService.java
+++ b/src/main/java/de/dennisguse/opentracks/services/TrackRecordingService.java
@@ -150,12 +150,7 @@ public class TrackRecordingService extends Service {
             if (locationExecutorService == null || locationExecutorService.isShutdown() || locationExecutorService.isTerminated()) {
                 return;
             }
-            locationExecutorService.submit(new Runnable() {
-                @Override
-                public void run() {
-                    onLocationChangedAsync(location);
-                }
-            });
+            locationExecutorService.submit(() -> onLocationChangedAsync(location));
         }
 
         @Override
diff --git a/src/main/java/de/dennisguse/opentracks/settings/SettingsActivity.java b/src/main/java/de/dennisguse/opentracks/settings/SettingsActivity.java
index 5017e2d97..d17245e22 100644
--- a/src/main/java/de/dennisguse/opentracks/settings/SettingsActivity.java
+++ b/src/main/java/de/dennisguse/opentracks/settings/SettingsActivity.java
@@ -60,20 +60,10 @@ public class SettingsActivity extends AppCompatActivity implements ChooseActivit
             @Override
             public void onSharedPreferenceChanged(SharedPreferences preferences, String key) {
                 if (PreferencesUtils.isKey(getActivity(), R.string.recording_track_id_key, key)) {
-                    getActivity().runOnUiThread(new Runnable() {
-                        @Override
-                        public void run() {
-                            updateReset();
-                        }
-                    });
+                    getActivity().runOnUiThread(() -> updateReset());
                 }
                 if (PreferencesUtils.isKey(getActivity(), R.string.stats_units_key, key)) {
-                    getActivity().runOnUiThread(new Runnable() {
-                        @Override
-                        public void run() {
-                            updateUnits();
-                        }
-                    });
+                    getActivity().runOnUiThread(() -> updateUnits());
                 }
             }
         };
diff --git a/src/main/java/de/dennisguse/opentracks/util/BluetoothUtils.java b/src/main/java/de/dennisguse/opentracks/util/BluetoothUtils.java
index ed32d1c9f..26928de70 100644
--- a/src/main/java/de/dennisguse/opentracks/util/BluetoothUtils.java
+++ b/src/main/java/de/dennisguse/opentracks/util/BluetoothUtils.java
@@ -61,13 +61,10 @@ public class BluetoothUtils {
         final Object mutex = new Object();
 
         Handler handler = new Handler(Looper.getMainLooper());
-        handler.post(new Runnable() {
-            @Override
-            public void run() {
-                adapters.add(BluetoothAdapter.getDefaultAdapter());
-                synchronized (mutex) {
-                    mutex.notify();
-                }
+        handler.post(() -> {
+            adapters.add(BluetoothAdapter.getDefaultAdapter());
+            synchronized (mutex) {
+                mutex.notify();
             }
         });