compile 'com.android.support:design:25.3.1'

<android.support.design.widget.CoordinatorLayout >

    <!-- .....   -->

    <LinearLayout
       android:id="@+id/bottom_sheet"
       android:elevation="4dp"
       android:minHeight="120dp"
       app:behavior_peekHeight="120dp"
       ...
       app:layout_behavior="android.support.design.widget.BottomSheetBehavior">

           <!-- .....   -->

       </LinearLayout>

</android.support.design.widget.CoordinatorLayout>

// The View with the BottomSheetBehavior  
View bottomSheet = coordinatorLayout.findViewById(R.id.bottom_sheet);  
BottomSheetBehavior mBottomSheetBehavior = BottomSheetBehavior.from(bottomSheet);

mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);

mButton = (Button) findViewById(R.id.button_2);
    //On Button click we monitor the state of the sheet
    mButton.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            if (mBottomSheetBehavior.getState() == BottomSheetBehavior.STATE_EXPANDED) {
                //If expanded then collapse it (setting in Peek mode).
                mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_COLLAPSED);
                mButton.setText(R.string.button2_hide);
            } else if (mBottomSheetBehavior.getState() == BottomSheetBehavior.STATE_COLLAPSED) {
                //If Collapsed then hide it completely.
                mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_HIDDEN);
                mButton.setText(R.string.button2);
            } else if (mBottomSheetBehavior.getState() == BottomSheetBehavior.STATE_HIDDEN) {
                //If hidden then Collapse or Expand, as the need be.
                mBottomSheetBehavior.setState(BottomSheetBehavior.STATE_EXPANDED);
                mButton.setText(R.string.button2_peek);
            }
        }
    });

mBottomSheetBehavior.setBottomSheetCallback(new BottomSheetCallback() {  
    @Override  
    public void onStateChanged(@NonNull View bottomSheet, int newState) {  
      // React to state change and notify views of the current state
    }  
      @Override  
      public void onSlide(@NonNull View bottomSheet, float slideOffset) {  
       // React to dragging events and animate views or transparency of dependent views
   }  
 });

mBottomSheetBehavior2.setHideable(false);

public class BottomSheetDialogFragmentExample extends BottomSheetDialogFragment {
 
    private BottomSheetBehavior.BottomSheetCallback mBottomSheetBehaviorCallback = new BottomSheetBehavior.BottomSheetCallback() {
 
        @Override
        public void onStateChanged(@NonNull View bottomSheet, int newState) {
            if (newState == BottomSheetBehavior.STATE_HIDDEN) {
                dismiss();
            }
 
        }
 
        @Override
        public void onSlide(@NonNull View bottomSheet, float slideOffset) {
        }
    };
 
    @Override
    public void setupDialog(Dialog dialog, int style) {
        super.setupDialog(dialog, style);
        View contentView = View.inflate(getContext(), R.layout.fragment_bottom_sheet, null);
        dialog.setContentView(contentView);
 
        CoordinatorLayout.LayoutParams params = (CoordinatorLayout.LayoutParams) ((View) contentView.getParent()).getLayoutParams();
        CoordinatorLayout.Behavior behavior = params.getBehavior();
 
        if( behavior != null && behavior instanceof BottomSheetBehavior ) {
            ((BottomSheetBehavior) behavior).setBottomSheetCallback(mBottomSheetBehaviorCallback);
        }
    }
}

BottomSheetDialogFragment bottomSheetDialogFragment = new BottomSheetDialogFragmentExample();
bottomSheetDialogFragment.show(getSupportFragmentManager(), bottomSheetDialogFragment.getTag());