change background image

app/src/main/java/com/motse/fengshui_compass/ui/home/HomeViewModel.java

@@ -16,6 +16,7 @@ public class HomeViewModel extends ViewModel {
     private final MutableLiveData<Float> rotation;
     RotateThread rotateThread;
     private Handler handler;
+    private Handler serialThreadHandle;
 
     public HomeViewModel() {
         handler = new Handler(Looper.getMainLooper()) {
@@ -28,8 +29,6 @@ public class HomeViewModel extends ViewModel {
         };
         rotation = new MutableLiveData<>();
         rotation.setValue((float) 0);
-//        rotateThread = new RotateThread(handler);
-//        rotateThread.start();
     }
 
     public void initThread() {

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

@@ -4,7 +4,7 @@
     android:id="@+id/container"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:paddingTop="?attr/actionBarSize">
+    android:paddingTop="0dp">
 
     <com.google.android.material.bottomnavigation.BottomNavigationView
         android:id="@+id/nav_view"

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

@@ -4,6 +4,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
+    android:background="@drawable/bg"
     tools:context=".ui.home.HomeFragment">
 
     <ImageView