diff --git a/app/src/google/java/org/traccar/client/GoogleMainApplication.java b/app/src/google/java/org/traccar/client/GoogleMainApplication.kt
similarity index 100%
rename from app/src/google/java/org/traccar/client/GoogleMainApplication.java
rename to app/src/google/java/org/traccar/client/GoogleMainApplication.kt
diff --git a/app/src/google/java/org/traccar/client/GooglePositionProvider.java b/app/src/google/java/org/traccar/client/GooglePositionProvider.kt
similarity index 100%
rename from app/src/google/java/org/traccar/client/GooglePositionProvider.java
rename to app/src/google/java/org/traccar/client/GooglePositionProvider.kt
diff --git a/app/src/google/java/org/traccar/client/PositionProviderFactory.java b/app/src/google/java/org/traccar/client/PositionProviderFactory.kt
similarity index 100%
rename from app/src/google/java/org/traccar/client/PositionProviderFactory.java
rename to app/src/google/java/org/traccar/client/PositionProviderFactory.kt
diff --git a/app/src/google/java/org/traccar/client/ServiceReceiver.java b/app/src/google/java/org/traccar/client/ServiceReceiver.kt
similarity index 100%
rename from app/src/google/java/org/traccar/client/ServiceReceiver.java
rename to app/src/google/java/org/traccar/client/ServiceReceiver.kt
diff --git a/app/src/main/java/org/traccar/client/AutostartReceiver.java b/app/src/main/java/org/traccar/client/AutostartReceiver.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/AutostartReceiver.java
rename to app/src/main/java/org/traccar/client/AutostartReceiver.kt
diff --git a/app/src/main/java/org/traccar/client/DatabaseHelper.java b/app/src/main/java/org/traccar/client/DatabaseHelper.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/DatabaseHelper.java
rename to app/src/main/java/org/traccar/client/DatabaseHelper.kt
diff --git a/app/src/main/java/org/traccar/client/DialLaunchReceiver.java b/app/src/main/java/org/traccar/client/DialLaunchReceiver.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/DialLaunchReceiver.java
rename to app/src/main/java/org/traccar/client/DialLaunchReceiver.kt
diff --git a/app/src/main/java/org/traccar/client/MainActivity.java b/app/src/main/java/org/traccar/client/MainActivity.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/MainActivity.java
rename to app/src/main/java/org/traccar/client/MainActivity.kt
diff --git a/app/src/main/java/org/traccar/client/MainApplication.java b/app/src/main/java/org/traccar/client/MainApplication.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/MainApplication.java
rename to app/src/main/java/org/traccar/client/MainApplication.kt
diff --git a/app/src/main/java/org/traccar/client/MainFragment.java b/app/src/main/java/org/traccar/client/MainFragment.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/MainFragment.java
rename to app/src/main/java/org/traccar/client/MainFragment.kt
diff --git a/app/src/main/java/org/traccar/client/NetworkManager.java b/app/src/main/java/org/traccar/client/NetworkManager.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/NetworkManager.java
rename to app/src/main/java/org/traccar/client/NetworkManager.kt
diff --git a/app/src/main/java/org/traccar/client/Position.java b/app/src/main/java/org/traccar/client/Position.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/Position.java
rename to app/src/main/java/org/traccar/client/Position.kt
diff --git a/app/src/main/java/org/traccar/client/PositionProvider.java b/app/src/main/java/org/traccar/client/PositionProvider.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/PositionProvider.java
rename to app/src/main/java/org/traccar/client/PositionProvider.kt
diff --git a/app/src/main/java/org/traccar/client/ProtocolFormatter.java b/app/src/main/java/org/traccar/client/ProtocolFormatter.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/ProtocolFormatter.java
rename to app/src/main/java/org/traccar/client/ProtocolFormatter.kt
diff --git a/app/src/main/java/org/traccar/client/RequestManager.java b/app/src/main/java/org/traccar/client/RequestManager.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/RequestManager.java
rename to app/src/main/java/org/traccar/client/RequestManager.kt
diff --git a/app/src/main/java/org/traccar/client/ShortcutActivity.java b/app/src/main/java/org/traccar/client/ShortcutActivity.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/ShortcutActivity.java
rename to app/src/main/java/org/traccar/client/ShortcutActivity.kt
diff --git a/app/src/main/java/org/traccar/client/StatusActivity.java b/app/src/main/java/org/traccar/client/StatusActivity.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/StatusActivity.java
rename to app/src/main/java/org/traccar/client/StatusActivity.kt
diff --git a/app/src/main/java/org/traccar/client/TrackingController.java b/app/src/main/java/org/traccar/client/TrackingController.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/TrackingController.java
rename to app/src/main/java/org/traccar/client/TrackingController.kt
diff --git a/app/src/main/java/org/traccar/client/TrackingService.java b/app/src/main/java/org/traccar/client/TrackingService.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/TrackingService.java
rename to app/src/main/java/org/traccar/client/TrackingService.kt
diff --git a/app/src/main/java/org/traccar/client/WakefulBroadcastReceiver.java b/app/src/main/java/org/traccar/client/WakefulBroadcastReceiver.kt
similarity index 100%
rename from app/src/main/java/org/traccar/client/WakefulBroadcastReceiver.java
rename to app/src/main/java/org/traccar/client/WakefulBroadcastReceiver.kt
diff --git a/app/src/regular/java/org/traccar/client/PositionProviderFactory.java b/app/src/regular/java/org/traccar/client/PositionProviderFactory.kt
similarity index 100%
rename from app/src/regular/java/org/traccar/client/PositionProviderFactory.java
rename to app/src/regular/java/org/traccar/client/PositionProviderFactory.kt
diff --git a/app/src/test/java/org/traccar/client/DatabaseHelperTest.java b/app/src/test/java/org/traccar/client/DatabaseHelperTest.kt
similarity index 100%
rename from app/src/test/java/org/traccar/client/DatabaseHelperTest.java
rename to app/src/test/java/org/traccar/client/DatabaseHelperTest.kt
diff --git a/app/src/test/java/org/traccar/client/ProtocolFormatterTest.java b/app/src/test/java/org/traccar/client/ProtocolFormatterTest.kt
similarity index 100%
rename from app/src/test/java/org/traccar/client/ProtocolFormatterTest.java
rename to app/src/test/java/org/traccar/client/ProtocolFormatterTest.kt
diff --git a/app/src/test/java/org/traccar/client/RequestManagerTest.java b/app/src/test/java/org/traccar/client/RequestManagerTest.kt
similarity index 100%
rename from app/src/test/java/org/traccar/client/RequestManagerTest.java
rename to app/src/test/java/org/traccar/client/RequestManagerTest.kt