Java Code Examples for android.support.design.widget.CoordinatorLayout#getHeight()

The following examples show how to use android.support.design.widget.CoordinatorLayout#getHeight() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example 1

Source File: SpringHeaderBehavior.java From SpringHeader with Apache License 2.0

6 votes

@Override
public boolean onLayoutChild(CoordinatorLayout parent, View child, int layoutDirection) {
    boolean handled = super.onLayoutChild(parent, child, layoutDirection);

    int parentHeight = parent.getHeight();
    int childHeight = child.getHeight();

    if (mOriginalOffset == UNSET) {
        setOriginalOffset(-childHeight);
    }
    if (mHoveringRange == UNSET) {
        setHoveringRange(childHeight);
    }
    if (mMaxRange == UNSET) {
        setMaxRange(parentHeight);
    }

    if (!mOriginalOffsetSet) {
        super.setTopAndBottomOffset(mOriginalOffset);
        mOriginalOffsetSet = true;
    }

    return handled;
}

Example 2

Source File: ViewPagerBottomSheetBehavior.java From FabulousFilter with Apache License 2.0

5 votes

@Override
public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) {
    if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) {
        ViewCompat.setFitsSystemWindows(child, true);
    }
    int savedTop = child.getTop();
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);
    // Offset the bottom sheet
    mParentHeight = parent.getHeight();
    int peekHeight;
    if (mPeekHeightAuto) {
        if (mPeekHeightMin == 0) {
            mPeekHeightMin = parent.getResources().getDimensionPixelSize(
                    R.dimen.design_bottom_sheet_peek_height_min);
        }
        peekHeight = Math.max(mPeekHeightMin, mParentHeight - parent.getWidth() * 9 / 16);
    } else {
        peekHeight = mPeekHeight;
    }
    mMinOffset = Math.max(0, mParentHeight - child.getHeight());
    mMaxOffset = Math.max(mParentHeight - peekHeight, mMinOffset);
    if (mState == STATE_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, mMinOffset);
    } else if (mHideable && mState == STATE_HIDDEN) {
        ViewCompat.offsetTopAndBottom(child, mParentHeight);
    } else if (mState == STATE_COLLAPSED) {
        ViewCompat.offsetTopAndBottom(child, mMaxOffset);
    } else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) {
        ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
    }
    if (mViewDragHelper == null) {
        mViewDragHelper = ViewDragHelper.create(parent, mDragCallback);
    }
    mViewRef = new WeakReference<>(child);
    mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    return true;
}

Example 3

Source File: BottomSheetBehaviorV2.java From paper-launcher with MIT License

5 votes

@Override
public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) {
    if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) {
        ViewCompat.setFitsSystemWindows(child, true);
    }
    int savedTop = child.getTop();
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);
    // Offset the bottom sheet
    mParentHeight = parent.getHeight();
    int peekHeight;
    if (mPeekHeightAuto) {
        if (mPeekHeightMin == 0) {
            mPeekHeightMin = parent.getResources().getDimensionPixelSize(
                    android.support.design.R.dimen.design_bottom_sheet_peek_height_min);
        }
        peekHeight = Math.max(mPeekHeightMin, mParentHeight - parent.getWidth() * 9 / 16);
    } else {
        peekHeight = mPeekHeight;
    }
    mMinOffset = Math.max(0, mParentHeight - child.getHeight());
    mMaxOffset = Math.max(mParentHeight - peekHeight, mMinOffset);
    if (mState == STATE_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, mMinOffset);
    } else if (mHideable && mState == STATE_HIDDEN) {
        ViewCompat.offsetTopAndBottom(child, mParentHeight);
    } else if (mState == STATE_COLLAPSED) {
        ViewCompat.offsetTopAndBottom(child, mMaxOffset);
    } else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) {
        ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
    }
    if (mViewDragHelper == null) {
        mViewDragHelper = ViewDragHelper.create(parent, mDragCallback);
    }
    mViewRef = new WeakReference<>(child);
    mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    return true;
}

Example 4

Source File: BottomSheetBehaviorV2.java From paper-launcher with MIT License

5 votes

public boolean onLayoutChildFixed(CoordinatorLayout parent, V child, int layoutDirection) {
    if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) {
        ViewCompat.setFitsSystemWindows(child, true);
    }
    int savedTop = child.getTop();
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);
    // Offset the bottom sheet
    mParentHeight = parent.getHeight();
    int peekHeight;
    if (mPeekHeightAuto) {
        if (mPeekHeightMin == 0) {
            mPeekHeightMin = parent.getResources().getDimensionPixelSize(
                    android.support.design.R.dimen.design_bottom_sheet_peek_height_min);
        }
        peekHeight = Math.max(mPeekHeightMin, mParentHeight - parent.getWidth() * 9 / 16);
    } else {
        peekHeight = mPeekHeight;
    }
    mMinOffset = Math.max(0, mParentHeight - child.getHeight());
    mMaxOffset = Math.max(mParentHeight - peekHeight, mMinOffset);
    if (mState == STATE_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, mMinOffset);
    } else if (mHideable && mState == STATE_HIDDEN) {
        ViewCompat.offsetTopAndBottom(child, mParentHeight);
    } else if (mState == STATE_COLLAPSED) {
        ViewCompat.offsetTopAndBottom(child, mMaxOffset);
    } else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) {
        ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
    }
    if (mViewDragHelper == null) {
        mViewDragHelper = ViewDragHelper.create(parent, mDragCallback);
    }
    mViewRef = new WeakReference<>(child);
    mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    return true;
}

Example 5

Source File: BottomSheetBehaviorGoogleMapsLike.java From Nibo with MIT License

5 votes

@Override
public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) {
    // First let the parent lay it out
    if (mState != STATE_DRAGGING && mState != STATE_SETTLING) {
        if (ViewCompat.getFitsSystemWindows(parent) &&
                !ViewCompat.getFitsSystemWindows(child)) {
            ViewCompat.setFitsSystemWindows(child, true);
        }
        parent.onLayoutChild(child, layoutDirection);
    }
    // Offset the bottom sheet
    mParentHeight = parent.getHeight();
    mMinOffset = Math.max(0, mParentHeight - child.getHeight());
    mMaxOffset = Math.max(mParentHeight - mPeekHeight, mMinOffset);

    /**
     * New behavior
     */
    if (mState == STATE_ANCHOR_POINT) {
        ViewCompat.offsetTopAndBottom(child, mAnchorPoint);
    } else if (mState == STATE_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, mMinOffset);
    } else if (mHideable && mState == STATE_HIDDEN) {
        ViewCompat.offsetTopAndBottom(child, mParentHeight);
    } else if (mState == STATE_COLLAPSED) {
        ViewCompat.offsetTopAndBottom(child, mMaxOffset);
    }
    if (mViewDragHelper == null) {
        mViewDragHelper = ViewDragHelper.create(parent, mDragCallback);
    }
    mViewRef = new WeakReference<>(child);
    mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    return true;
}

Example 6

Source File: BottomNavigationBehavior.java From BottomNavigationBar with MIT License

5 votes

@Override
public void onNestedPreScroll(CoordinatorLayout coordinatorLayout, V child, View target, int dx, int dy, int[] consumed) {
    if (dy > 0) {
        if (child.getY() == coordinatorLayout.getHeight() - child.getHeight()) {
            child.animate().translationY(child.getHeight()).setDuration(200).start();
        }
    } else {
        if (child.getY() == coordinatorLayout.getHeight()) {
            Log.i("etong", "onNestedPreScroll");
            child.animate().translationY(0).setDuration(250).start();
        }
    }
}

Example 7

Source File: ImageStreamUi.java From belvedere with Apache License 2.0

5 votes

@Override
public boolean onDependentViewChanged(CoordinatorLayout parent, View child, View dependency) {
    int scrollArea = parent.getHeight() - bottomSheetBehavior.getPeekHeight();
    float scrollPosition = (parent.getHeight() - dependency.getY() - bottomSheetBehavior.getPeekHeight()) / scrollArea;

    animateToolbarShiftIn(scrollArea, scrollPosition, ViewCompat.getMinimumHeight(toolbar), child);

    if(notifyScrollListener) {
        presenter.onImageStreamScrolled(parent.getHeight(), scrollArea, scrollPosition);
    }

    return true;
}

Example 8

Source File: TopSheetBehavior.java From AndroidTopSheet with Apache License 2.0

5 votes

@Override
public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) {
    if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) {
        ViewCompat.setFitsSystemWindows(child, true);
    }
    int savedTop = child.getTop();
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);
    // Offset the bottom sheet
    mParentHeight = parent.getHeight();
    mMinOffset = Math.max(-child.getHeight(), -(child.getHeight() - mPeekHeight));
    mMaxOffset = 0;
    if (mState == STATE_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, mMaxOffset);
    } else if (mHideable && mState == STATE_HIDDEN) {
        ViewCompat.offsetTopAndBottom(child, -child.getHeight());
    } else if (mState == STATE_COLLAPSED) {
        ViewCompat.offsetTopAndBottom(child, mMinOffset);
    } else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) {
        ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
    }
    if (mViewDragHelper == null) {
        mViewDragHelper = ViewDragHelper.create(parent, mDragCallback);
    }
    mViewRef = new WeakReference<>(child);
    mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    return true;
}

Example 9

Source File: ViewPagerBottomSheetBehavior.java From ViewPagerBottomSheet with Apache License 2.0

5 votes

@Override
public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) {
    if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) {
        ViewCompat.setFitsSystemWindows(child, true);
    }
    int savedTop = child.getTop();
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);
    // Offset the bottom sheet
    mParentHeight = parent.getHeight();
    int peekHeight;
    if (mPeekHeightAuto) {
        if (mPeekHeightMin == 0) {
            mPeekHeightMin = parent.getResources().getDimensionPixelSize(
                    R.dimen.design_bottom_sheet_peek_height_min);
        }
        peekHeight = Math.max(mPeekHeightMin, mParentHeight - parent.getWidth() * 9 / 16);
    } else {
        peekHeight = mPeekHeight;
    }
    mMinOffset = Math.max(0, mParentHeight - child.getHeight());
    mMaxOffset = Math.max(mParentHeight - peekHeight, mMinOffset);
    if (mState == STATE_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, mMinOffset);
    } else if (mHideable && mState == STATE_HIDDEN) {
        ViewCompat.offsetTopAndBottom(child, mParentHeight);
    } else if (mState == STATE_COLLAPSED) {
        ViewCompat.offsetTopAndBottom(child, mMaxOffset);
    } else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) {
        ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
    }
    if (mViewDragHelper == null) {
        mViewDragHelper = ViewDragHelper.create(parent, mDragCallback);
    }
    mViewRef = new WeakReference<>(child);
    mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    return true;
}

Example 10

Source File: VerticalFabBehavior.java From CoordinatorLayoutExample with Apache License 2.0

5 votes

@Override
public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, View child, View directTargetChild, View target, int nestedScrollAxes) {

    if(child.getVisibility() == View.VISIBLE&&viewY==0){
        //获取控件距离父布局（coordinatorLayout）底部距离
        viewY=coordinatorLayout.getHeight()-child.getY();
    }

    return (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0;//判断是否竖直滚动
}

Example 11

Source File: MyFabBehavior.java From CoordinatorLayoutExample with Apache License 2.0

5 votes

@Override
public boolean onStartNestedScroll(CoordinatorLayout coordinatorLayout, View child, View directTargetChild, View target, int nestedScrollAxes) {

    if(child.getVisibility() == View.VISIBLE&&viewY==0){
        //获取控件距离父布局（coordinatorLayout）底部距离
        viewY=coordinatorLayout.getHeight()-child.getY();
    }

    return (nestedScrollAxes & ViewCompat.SCROLL_AXIS_VERTICAL) != 0;//判断是否竖直滚动
}

Example 12

Source File: RNBottomSheetBehavior.java From react-native-bottom-sheet-behavior with MIT License

5 votes

@Override
public boolean onLayoutChild( CoordinatorLayout parent, V child, int layoutDirection ) {
  // First let the parent lay it out
  if (mState != STATE_DRAGGING && mState != STATE_SETTLING) {
    if (ViewCompat.getFitsSystemWindows(parent) &&
        !ViewCompat.getFitsSystemWindows(child)) {
      ViewCompat.setFitsSystemWindows(child, true);
    }
    parent.onLayoutChild(child, layoutDirection);
  }
  // Offset the bottom sheet
  mParentHeight = parent.getHeight();
  mMinOffset = Math.max(0, mParentHeight - child.getHeight());
  mMaxOffset = Math.max(mParentHeight - mPeekHeight, mMinOffset);

  /**
   * New behavior
   */
  if (mAnchorEnabled && mState == STATE_ANCHOR_POINT) {
    toggleHeaderColor(true);
    ViewCompat.offsetTopAndBottom(child, mAnchorPoint);
  } else if (mState == STATE_EXPANDED) {
    toggleHeaderColor(true);
    ViewCompat.offsetTopAndBottom(child, mMinOffset);
  } else if (mHideable && mState == STATE_HIDDEN) {
    ViewCompat.offsetTopAndBottom(child, mParentHeight);
  } else if (mState == STATE_COLLAPSED) {
    toggleHeaderColor(false);
    ViewCompat.offsetTopAndBottom(child, mMaxOffset);
  }
  if ( mViewDragHelper == null ) {
    mViewDragHelper = ViewDragHelper.create( parent, mDragCallback );
  }
  mViewRef = new WeakReference<>(child);
  mNestedScrollingChildRef = new WeakReference<>( findScrollingChild( child ) );
  return true;
}

Example 13

Source File: MyBottomBehavior.java From OpenWeatherPlus-Android with Apache License 2.0

4 votes

public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) {
    if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) {
        child.setFitsSystemWindows(true);
    }

    int savedTop = child.getTop();
    parent.onLayoutChild(child, layoutDirection);
    this.parentHeight = parent.getHeight();
    if (this.peekHeightAuto) {
        if (this.peekHeightMin == 0) {
            this.peekHeightMin = parent.getResources().getDimensionPixelSize(dimen.design_bottom_sheet_peek_height_min);
        }

        this.lastPeekHeight = Math.max(this.peekHeightMin, this.parentHeight - parent.getWidth() * 9 / 16);
    } else {
        this.lastPeekHeight = this.peekHeight;
    }

    this.fitToContentsOffset = Math.max(0, this.parentHeight - child.getHeight());
    this.halfExpandedOffset = parent.getHeight() - DisplayUtil.dip2px(MyApplication.getInstance(), 470);
    this.calculateCollapsedOffset();
    if (this.state == 3) {
        ViewCompat.offsetTopAndBottom(child, this.getExpandedOffset());
    } else if (this.state == 6) {
        ViewCompat.offsetTopAndBottom(child, this.halfExpandedOffset);
    } else if (this.hideable && this.state == 5) {
        ViewCompat.offsetTopAndBottom(child, this.parentHeight);
    } else if (this.state == 4) {
        ViewCompat.offsetTopAndBottom(child, this.collapsedOffset);
    } else if (this.state == 1 || this.state == 2) {
        ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
    }

    if (this.viewDragHelper == null) {
        this.viewDragHelper = ViewDragHelper.create(parent, this.dragCallback);
    }

    this.viewRef = new WeakReference(child);
    this.nestedScrollingChildRef = new WeakReference(this.findScrollingChild(child));
    return true;
}

Example 14

Source File: AnchorSheetBehavior.java From AnchorSheetBehavior with Apache License 2.0

4 votes

@Override
public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) {
    if (getFitsSystemWindows(parent) && !getFitsSystemWindows(child)) {
        child.setFitsSystemWindows(true);
    }
    int savedTop = child.getTop();
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);
    // Offset the bottom sheet
    mParentHeight = parent.getHeight();
    int peekHeight;
    if (mPeekHeightAuto) {
        if (mPeekHeightMin == 0) {
            mPeekHeightMin = parent.getResources().getDimensionPixelSize(
                    android.support.design.R.dimen.design_bottom_sheet_peek_height_min);
        }
        peekHeight = Math.max(mPeekHeightMin, mParentHeight - parent.getWidth() * 9 / 16);
    } else {
        peekHeight = mPeekHeight;
    }
    mMinOffset = Math.max(0, mParentHeight - child.getHeight());
    mMaxOffset = Math.max(mParentHeight - peekHeight, mMinOffset);
    mAnchorOffset = (int) Math.max(mParentHeight * mAnchorThreshold, mMinOffset);
    if (mState == STATE_EXPANDED) {
        offsetTopAndBottom(child, mMinOffset);
    } else if (mState == STATE_ANCHOR) {
        offsetTopAndBottom(child, mAnchorOffset);
    } else if ((mHideable && mState == STATE_HIDDEN) || mState == STATE_FORCE_HIDDEN) {
        offsetTopAndBottom(child, mParentHeight);
    } else if (mState == STATE_COLLAPSED) {
        offsetTopAndBottom(child, mMaxOffset);
    } else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) {
        offsetTopAndBottom(child, savedTop - child.getTop());
    }
    if (mViewDragHelper == null) {
        mViewDragHelper = ViewDragHelper.create(parent, mDragCallback);
    }
    mViewRef = new WeakReference<>(child);
    mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    return true;
}

Example 15

Source File: AnchorBottomSheetBehavior.java From anchor-bottom-sheet-behavior with Apache License 2.0

4 votes

@Override
public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) {
    if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) {
        ViewCompat.setFitsSystemWindows(child, true);
    }
    int savedTop = child.getTop();
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);
    // Offset the bottom sheet
    mParentHeight = parent.getHeight();
    int peekHeight;
    if (mPeekHeightAuto) {
        if (mPeekHeightMin == 0) {
            mPeekHeightMin = parent.getResources().getDimensionPixelSize(
                    android.support.design.R.dimen.design_bottom_sheet_peek_height_min);
        }
        peekHeight = Math.max(mPeekHeightMin, mParentHeight - parent.getWidth() * 9 / 16);
    } else {
        peekHeight = mPeekHeight;
    }
    mMinOffset = Math.max(0, mParentHeight - child.getHeight());
    if (mDisableExpanded) {
        mMinOffset = mAnchorOffset;
    }
    mMaxOffset = Math.max(mParentHeight - peekHeight, mMinOffset);
    if (mState == STATE_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, mMinOffset);
    } else if (mHideable && mState == STATE_HIDDEN) {
        ViewCompat.offsetTopAndBottom(child, mParentHeight);
    } else if (mState == STATE_COLLAPSED) {
        ViewCompat.offsetTopAndBottom(child, mMaxOffset);
    } else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) {
        ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
    } else if (mState == STATE_ANCHORED) {
        if (mAnchorOffset > mMinOffset) {
            ViewCompat.offsetTopAndBottom(child, mAnchorOffset);
        } else {
            mState = STATE_EXPANDED;
            ViewCompat.offsetTopAndBottom(child, mMinOffset);
        }
    }
    if (mViewDragHelper == null) {
        mViewDragHelper = ViewDragHelper.create(parent, mDragCallback);
    }
    mViewRef = new WeakReference<>(child);
    mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    return true;
}

Example 16

Source File: GoogleMapsBottomSheetBehavior.java From Google-Maps-BottomSheet with The Unlicense

4 votes

@Override
public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) {
    if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) {
        ViewCompat.setFitsSystemWindows(child, true);
    }
    int savedTop = child.getTop();
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);
    // Offset the bottom sheet
    mParentHeight = parent.getHeight();
    if (mPeekHeightAuto) {
        if (mPeekHeightMin == 0) {
            mPeekHeightMin = parent.getResources().getDimensionPixelSize(R.dimen.peekHeightMin);
        }
        mPeekHeight = mPeekHeightMin;
    }
    if (mAnchorHeightAuto) {
        if (mAnchorHeightMin == 0) {
            mAnchorHeightMin = mParentHeight - parent.getWidth() * 9 / 16;
        }
        mAnchorHeight = mAnchorHeightMin;
    }
    mMinOffset = Math.max(0, mParentHeight - child.getHeight());
    mMaxOffset = Math.max(mParentHeight - mPeekHeight, mMinOffset);
    mAnchorOffset = Math.min(mParentHeight - mAnchorHeight, mMaxOffset);
    if (mState == STATE_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, mMinOffset);
        updateHeaderColor(mAnchorColor, mAnchorTextColor);
        anchorViews(mMinOffset);
    } else if (mHideable && mState == STATE_HIDDEN) {
        ViewCompat.offsetTopAndBottom(child, mParentHeight);
        anchorViews(mParentHeight);
    } else if (mState == STATE_COLLAPSED) {
        ViewCompat.offsetTopAndBottom(child, mMaxOffset);
        anchorViews(mMaxOffset);
    } else if (mState == STATE_DRAGGING || mState == STATE_SETTLING) {
        ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
    } else if (mState == STATE_ANCHORED) {
        ViewCompat.offsetTopAndBottom(child, mAnchorOffset);
        updateHeaderColor(mAnchorColor, mAnchorTextColor);
        if (parallax != null) {
            int reference = savedTop - parallax.getHeight();
            parallax.setY(reference);
            parallax.setVisibility(View.VISIBLE);
            anchorViews(reference);
        } else {
            anchorViews(mAnchorOffset);
        }
    }
    if (mViewDragHelper == null) {
        mViewDragHelper = ViewDragHelper.create(parent, mDragCallback);
    }
    mViewRef = new WeakReference<>(child);
    mNestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    // add missing views to the layout
    ViewGroup nestedScrolling = (ViewGroup) mNestedScrollingChildRef.get();
    if (nestedScrolling.getChildCount() == 0) {
        nestedScrolling.addView(bottomsheet);
    }
    return true;
}