fab.setBackgroundTintList(ColorStateList.valueOf(ContextCompat.getColor(PrivateDealActivity.this, R.color.colorWhite)));
This is not working. How to change background color of floating action button
fab.setBackgroundTintList(ColorStateList.valueOf(ContextCompat.getColor(PrivateDealActivity.this, R.color.colorWhite)));
This is not working. How to change background color of floating action button
 
    
     
    
    Using the material components FloatingActionButton and a material theme by default it uses the color with the attribute colorSecondary.
To change this color you have different options:
app:backgroundTint attribute in xml:<com.google.android.material.floatingactionbutton.FloatingActionButton
       ...
       app:backgroundTint=".." />
<item name="backgroundTint"> attribute  <!--<item name="floatingActionButtonStyle">@style/Widget.MaterialComponents.FloatingActionButton</item> -->
  <style name="MyFloatingActionButton" parent="@style/Widget.MaterialComponents.FloatingActionButton">
    <item name="backgroundTint">....</item>
  </style>
materialThemeOverlay attribute to override the default color colorSecondary only for a component:  <style name="MyFloatingActionButton" parent="@style/Widget.MaterialComponents.FloatingActionButton">
    <item name="materialThemeOverlay">@style/MyFabOverlay</item>
  </style>
  <style name="MyFabOverlay">
    <item name="colorSecondary">@color/custom2</item>
  </style>
 
    
    You can use this code to change the background color:
FloatingActionButton button = findViewById(R.id.your_button);
if (Build.VERSION.SDK_INT == Build.VERSION_CODES.LOLLIPOP && button instanceof AppCompatButton) {
    ((AppCompatButton) button).setSupportBackgroundTintList(ColorStateList.valueOf(*your color in integer*));
} else {
    ViewCompat.setBackgroundTintList(button, ColorStateList.valueOf(*your color in integer*));
}
 
    
    Your code is completely correct. I also wrote in a similar way for changing background color of floating action button programatically. Just check your xml code once. My XML Code :
<com.google.android.material.floatingactionbutton.FloatingActionButton
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_alignParentEnd="true"
    android:layout_alignParentBottom="true"
    app:borderWidth="0dp"
    android:id="@+id/fab"
    android:layout_margin="16dp"
    app:elevation="8dp"/>
Remember here, keeping borderWidth="0dp" is important.
Now, in Java Code :
fab = view.findViewById(R.id.fab);
fab.setBackgroundTintList(ColorStateList.valueOf(required_color));
Here you can replace required_color using Color.parseColor() or ContextCompat.getColor().
 
    
    A simple solution to your problem would be to change your default colorAccent.
As stated in Android Developers-FloatingActionButton :
The background color of this view defaults to the your theme's colorAccent. If you wish to change this at runtime then you can do so via setBackgroundTintList(ColorStateList).
If it is not possible to change your color accent, regarding the requirements of your project, but you need to implement this programmatically you can post your code and I'll be more than happy to update my answer.
 
    
    You could use
app:backgroundTint="@color/colorAccent"
like below
<android.support.design.widget.FloatingActionButton
        android:id="@+id/add_student_house"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        app:backgroundTint="@color/colorAccent"
        android:src="@drawable/ic_house_add"/>
just note it is app:backgroundTint not android:backgroundTint
Also you could do it by adding style:
<style name="AppTheme.FloatingActionButton" >
        <item name="colorAccent">@color/colorAccent</item>
</style>
And give this style as theme in floating action button like below:
android:theme="@style/AppTheme.FloatingActionButton"
<android.support.design.widget.FloatingActionButton
    android:id="@+id/add_student_house"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:theme="@style/AppTheme.FloatingActionButton"
    android:src="@drawable/ic_house_add"/>
