BottomSheetBehaviour: The view is not associated with BottomSheetBehavior

Question

I am using Google Design Support Library 25.0.0 In my activity I have a relative layout with

app:layout_behavior="android.support.design.widget.BottomSheetBehavior" 

Now when I reference it for adding BottomSheetBehaviour, I get the error

java.lang.IllegalArgumentException: The view is not associated with BottomSheetBehavior 

Here is the layout:

<android.support.design.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:map="http://schemas.android.com/apk/res-auto" android:layout_width="match_parent" android:layout_height="match_parent" android:id="@+id/maps_colayout" xmlns:app="http://schemas.android.com/tools" android:fitsSystemWindows="true" android:background="@color/white">  ...  <RelativeLayout     android:layout_width="match_parent"     android:layout_height="280dp"     android:layout_gravity="bottom"     android:id="@+id/rl_bottomsheet"     android:background="#F3F3F3"     app:layout_behavior="android.support.design.widget.BottomSheetBehavior">      ...  </RelativeLayout> 

And here is the activity relevant code:

CoordinatorLayout colayout = (CoordinatorLayout) findViewById(R.id.maps_colayout);     View bottomSheet = colayout.findViewById(R.id.rl_bottomsheet);     BottomSheetBehavior behavior = BottomSheetBehavior.from(bottomSheet);     behavior.setBottomSheetCallback(new BottomSheetBehavior.BottomSheetCallback() {         @Override         public void onStateChanged(@NonNull View bottomSheet, int newState) {             // React to state change         }          @Override         public void onSlide(@NonNull View bottomSheet, float slideOffset) {             // React to dragging events         }     }); 

Answer 1

You will need to add this line within your linear layout tag. The one that is being referenced.

app:layout_behavior="android.support.design.widget.BottomSheetBehavior" 

or for androidx

app:layout_behavior="com.google.android.material.bottomsheet.BottomSheetBehavior"