android BottomSheet how to collapse when clicked outside?

Finally I was able to do this,

Used the following lines of code:

@Override public boolean dispatchTouchEvent(MotionEvent event){    if (event.getAction() == MotionEvent.ACTION_DOWN) {        if (mBottomSheetBehavior.getState()==BottomSheetBehavior.STATE_EXPANDED) {            Rect outRect = new Rect();            bottomSheet.getGlobalVisibleRect(outRect);            if(!outRect.contains((int)event.getRawX(), (int)event.getRawY()))                mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);        }    }    return super.dispatchTouchEvent(event);}

Hope it save someone's whole day!

Thanks the OP for the question/answer. I've used his code but improved on its cleanliness and wanted to share. Instead of extending a View and adding the interface, you can code that directly in the BottomSheetBehavior. Like this:

AutoCloseBottomSheetBehavior.java

import android.content.Context;import android.graphics.Rect;import android.support.design.widget.BottomSheetBehavior;import android.support.design.widget.CoordinatorLayout;import android.util.AttributeSet;import android.view.MotionEvent;import android.view.View;public class AutoCloseBottomSheetBehavior<V extends View> extends BottomSheetBehavior<V> {    public AutoCloseBottomSheetBehavior(Context context, AttributeSet attrs) {        super(context, attrs);    }    @Override    public boolean onInterceptTouchEvent(CoordinatorLayout parent, V child, MotionEvent event) {        if (event.getAction() == MotionEvent.ACTION_DOWN &&            getState() == BottomSheetBehavior.STATE_EXPANDED) {            Rect outRect = new Rect();            child.getGlobalVisibleRect(outRect);            if (!outRect.contains((int) event.getRawX(), (int) event.getRawY())) {                setState(BottomSheetBehavior.STATE_COLLAPSED);            }        }        return super.onInterceptTouchEvent(parent, child, event);    }}

and then you simply add it to your XML layout:

<?xml version="1.0" encoding="utf-8"?><android.support.design.widget.CoordinatorLayout    xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent">   ... your normal content here ...   <SomeLayout... />    ... the bottom sheet with the behavior    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="vertical"        app:layout_behavior="<com.package.name.of.the.class>.AutoCloseBottomSheetBehavior">        ... the bottom sheet views    </LinearLayout></android.support.design.widget.CoordinatorLayout>

For Activity:

@Override public boolean dispatchTouchEvent(MotionEvent event){    if (event.getAction() == MotionEvent.ACTION_DOWN) {        if (mBottomSheetBehavior.getState()==BottomSheetBehavior.STATE_EXPANDED) {            Rect outRect = new Rect();            bottomSheet.getGlobalVisibleRect(outRect);            if(!outRect.contains((int)event.getRawX(), (int)event.getRawY()))                mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);        }    }    return super.dispatchTouchEvent(event);}

For Fragment: Use same method in Activity like,

@Overridepublic boolean dispatchTouchEvent(MotionEvent event) {    if (event.getAction() == MotionEvent.ACTION_DOWN) {        if (fragment != null && fragment instanceof HomeFragment) {            ((HomeFragment) fragment).hideBottomSheetFromOutSide(event);        }    }    return super.dispatchTouchEvent(event);}

and Create Method in Fragment like:

   /**     * Calling from Dashboard Activity     *     * @param event Motion Event     */    public void hideBottomSheetFromOutSide(MotionEvent event) {        if (isBottomSheetMenuExpanded()) {            Rect outRect = new Rect();            mBinding.homeBottomSheetLayout.getGlobalVisibleRect(outRect);            if (!outRect.contains((int) event.getRawX(), (int) event.getRawY()))                mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);        }    }

Hope it will helps you.

Thank you.