Java Code Examples for androidx.coordinatorlayout.widget.CoordinatorLayout#onLayoutChild()

@Override
public boolean onLayoutChild(
    @NonNull CoordinatorLayout parent,
    @NonNull ExtendedFloatingActionButton child,
    int layoutDirection) {
  // First, let's make sure that the visibility of the FAB is consistent
  final List<View> dependencies = parent.getDependencies(child);
  for (int i = 0, count = dependencies.size(); i < count; i++) {
    final View dependency = dependencies.get(i);
    if (dependency instanceof AppBarLayout) {
      if (updateFabVisibilityForAppBarLayout(parent, (AppBarLayout) dependency, child)) {
        break;
      }
    } else if (isBottomSheet(dependency)) {
      if (updateFabVisibilityForBottomSheet(dependency, child)) {
        break;
      }
    }
  }
  // Now let the CoordinatorLayout lay out the FAB
  parent.onLayoutChild(child, layoutDirection);
  return true;
}
 

@Override
public boolean onLayoutChild(
    @NonNull CoordinatorLayout parent,
    @NonNull FloatingActionButton child,
    int layoutDirection) {
  // First, let's make sure that the visibility of the FAB is consistent
  final List<View> dependencies = parent.getDependencies(child);
  for (int i = 0, count = dependencies.size(); i < count; i++) {
    final View dependency = dependencies.get(i);
    if (dependency instanceof AppBarLayout) {
      if (updateFabVisibilityForAppBarLayout(parent, (AppBarLayout) dependency, child)) {
        break;
      }
    } else if (isBottomSheet(dependency)) {
      if (updateFabVisibilityForBottomSheet(dependency, child)) {
        break;
      }
    }
  }
  // Now let the CoordinatorLayout lay out the FAB
  parent.onLayoutChild(child, layoutDirection);
  // Now offset it if needed
  offsetIfNeeded(parent, child);
  return true;
}
 

@Override
public boolean onLayoutChild(CoordinatorLayout parent, final V child, int layoutDirection) {
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);
    if (child instanceof BottomNavigationBar) {
        mViewRef = new WeakReference<>((BottomNavigationBar) child);
    }

    child.post(new Runnable() {
        @Override
        public void run() {
            mBottomNavHeight = child.getHeight();
        }
    });
    updateSnackBarPosition(parent, child, getSnackBarInstance(parent, child));

    return super.onLayoutChild(parent, child, layoutDirection);
}
 

@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 (parent.getFitsSystemWindows() &&
                !child.getFitsSystemWindows()) {
            child.setFitsSystemWindows(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;
}
 

@Override
public boolean onLayoutChild(
    @NonNull CoordinatorLayout parent, @NonNull BottomAppBar child, int layoutDirection) {
  viewRef = new WeakReference<>(child);

  View dependentView = child.findDependentView();
  if (dependentView != null && !ViewCompat.isLaidOut(dependentView)) {
    // Set the initial position of the FloatingActionButton with the BottomAppBar vertical
    // offset.
    CoordinatorLayout.LayoutParams fabLayoutParams =
        (CoordinatorLayout.LayoutParams) dependentView.getLayoutParams();
    fabLayoutParams.anchorGravity = Gravity.CENTER | Gravity.TOP;

    // Keep track of the original bottom margin for the fab. We will manage the margin if
    // nothing was set.
    originalBottomMargin = fabLayoutParams.bottomMargin;

    if (dependentView instanceof FloatingActionButton) {
      FloatingActionButton fab = ((FloatingActionButton) dependentView);

      // Always update the BAB if the fab is laid out.
      fab.addOnLayoutChangeListener(fabLayoutListener);

      // Ensure the FAB is correctly linked to this BAB so the animations can run correctly
      child.addFabAnimationListeners(fab);
    }

    // Move the fab to the correct position
    child.setCutoutState();
  }

  // Now let the CoordinatorLayout lay out the BAB
  parent.onLayoutChild(child, layoutDirection);
  return super.onLayoutChild(parent, child, layoutDirection);
}
 

@Override
public boolean onLayoutChild(CoordinatorLayout parent, FloatingActionButton child, int layoutDirection) {
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);

    updateFabTranslationForBottomNavigationBar(parent, child, null);

    return super.onLayoutChild(parent, child, layoutDirection);
}
 

@Override
public boolean onLayoutChild(CoordinatorLayout parent, V child, int layoutDirection) {
    if (ViewCompat.getFitsSystemWindows(parent) && !ViewCompat.getFitsSystemWindows(child)) {
        child.setFitsSystemWindows(true);
    }
    // Only set MaterialShapeDrawable as background if shapeTheming is enabled, otherwise will
    // default to android:background declared in styles or layout.
    if (shapeThemingEnabled && materialShapeDrawable != null) {
        ViewCompat.setBackground(child, materialShapeDrawable);
    }
    // Set elevation on MaterialShapeDrawable
    if (materialShapeDrawable != null) {
        // Use elevation attr if set on bottomsheet; otherwise, use elevation of child view.
        materialShapeDrawable.setElevation(
                elevation == -1 ? ViewCompat.getElevation(child) : elevation);
    }

    if (viewRef == null) {
        // First layout with this behavior.
        peekHeightMin =
                parent.getResources().getDimensionPixelSize(R.dimen.design_bottom_sheet_peek_height_min);
        viewRef = new WeakReference<>(child);
    }
    if (viewDragHelper == null) {
        viewDragHelper = ViewDragHelper.create(parent, dragCallback);
    }

    int savedTop = child.getTop();
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);
    // Offset the bottom sheet
    parentWidth = parent.getWidth();
    parentHeight = parent.getHeight();
    fitToContentsOffset = Math.max(0, parentHeight - child.getHeight());
    calculateHalfExpandedOffset();
    calculateCollapsedOffset();

    if (state == STATE_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, getExpandedOffset());
    } else if (state == STATE_HALF_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, halfExpandedOffset);
    } else if (hideable && state == STATE_HIDDEN) {
        ViewCompat.offsetTopAndBottom(child, parentHeight);
    } else if (state == STATE_COLLAPSED) {
        ViewCompat.offsetTopAndBottom(child, collapsedOffset);
    } else if (state == STATE_DRAGGING || state == STATE_SETTLING) {
        ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
    }

    //nestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    return true;
}
 

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

  if (viewRef == null) {
    // First layout with this behavior.
    peekHeightMin =
        parent.getResources().getDimensionPixelSize(R.dimen.design_bottom_sheet_peek_height_min);
    setSystemGestureInsets(parent);
    viewRef = new WeakReference<>(child);
    // Only set MaterialShapeDrawable as background if shapeTheming is enabled, otherwise will
    // default to android:background declared in styles or layout.
    if (shapeThemingEnabled && materialShapeDrawable != null) {
      ViewCompat.setBackground(child, materialShapeDrawable);
    }
    // Set elevation on MaterialShapeDrawable
    if (materialShapeDrawable != null) {
      // Use elevation attr if set on bottomsheet; otherwise, use elevation of child view.
      materialShapeDrawable.setElevation(
          elevation == -1 ? ViewCompat.getElevation(child) : elevation);
      // Update the material shape based on initial state.
      isShapeExpanded = state == STATE_EXPANDED;
      materialShapeDrawable.setInterpolation(isShapeExpanded ? 0f : 1f);
    }
    updateAccessibilityActions();
    if (ViewCompat.getImportantForAccessibility(child)
        == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
      ViewCompat.setImportantForAccessibility(child, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
    }
  }
  if (viewDragHelper == null) {
    viewDragHelper = ViewDragHelper.create(parent, dragCallback);
  }

  int savedTop = child.getTop();
  // First let the parent lay it out
  parent.onLayoutChild(child, layoutDirection);
  // Offset the bottom sheet
  parentWidth = parent.getWidth();
  parentHeight = parent.getHeight();
  fitToContentsOffset = Math.max(0, parentHeight - child.getHeight());
  calculateHalfExpandedOffset();
  calculateCollapsedOffset();

  if (state == STATE_EXPANDED) {
    ViewCompat.offsetTopAndBottom(child, getExpandedOffset());
  } else if (state == STATE_HALF_EXPANDED) {
    ViewCompat.offsetTopAndBottom(child, halfExpandedOffset);
  } else if (hideable && state == STATE_HIDDEN) {
    ViewCompat.offsetTopAndBottom(child, parentHeight);
  } else if (state == STATE_COLLAPSED) {
    ViewCompat.offsetTopAndBottom(child, collapsedOffset);
  } else if (state == STATE_DRAGGING || state == STATE_SETTLING) {
    ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
  }

  nestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
  return true;
}
 

protected void layoutChild(
    @NonNull CoordinatorLayout parent, @NonNull V child, int layoutDirection) {
  // Let the parent lay it out by default
  parent.onLayoutChild(child, layoutDirection);
}
 

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

    if (viewRef == null) {
        // First layout with this behavior.
        peekHeightMin =
                parent.getResources().getDimensionPixelSize(R.dimen.design_bottom_sheet_peek_height_min);
        viewRef = new WeakReference<>(child);
        // Only set MaterialShapeDrawable as background if shapeTheming is enabled, otherwise will
        // default to android:background declared in styles or layout.
        if (shapeThemingEnabled && materialShapeDrawable != null) {
            ViewCompat.setBackground(child, materialShapeDrawable);
        }
        // Set elevation on MaterialShapeDrawable
        if (materialShapeDrawable != null) {
            // Use elevation attr if set on bottomsheet; otherwise, use elevation of child view.
            materialShapeDrawable.setElevation(
                    elevation == -1 ? ViewCompat.getElevation(child) : elevation);
            // Update the material shape based on initial state.
            isShapeExpanded = state == STATE_EXPANDED;
            materialShapeDrawable.setInterpolation(isShapeExpanded ? 0f : 1f);
        }
        updateAccessibilityActions();
        if (ViewCompat.getImportantForAccessibility(child)
                == ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_AUTO) {
            ViewCompat.setImportantForAccessibility(child, ViewCompat.IMPORTANT_FOR_ACCESSIBILITY_YES);
        }
    }
    if (viewDragHelper == null) {
        viewDragHelper = ViewDragHelper.create(parent, dragCallback);
    }

    int savedTop = child.getTop();
    // First let the parent lay it out
    parent.onLayoutChild(child, layoutDirection);
    // Offset the bottom sheet
    parentWidth = parent.getWidth();
    parentHeight = parent.getHeight();
    fitToContentsOffset = Math.max(0, parentHeight - child.getHeight());
    calculateHalfExpandedOffset();
    calculateCollapsedOffset();

    if (state == STATE_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, getExpandedOffset());
    } else if (state == STATE_HALF_EXPANDED) {
        ViewCompat.offsetTopAndBottom(child, halfExpandedOffset);
    } else if (hideable && state == STATE_HIDDEN) {
        ViewCompat.offsetTopAndBottom(child, parentHeight);
    } else if (state == STATE_COLLAPSED) {
        ViewCompat.offsetTopAndBottom(child, collapsedOffset);
    } else if (state == STATE_DRAGGING || state == STATE_SETTLING) {
        ViewCompat.offsetTopAndBottom(child, savedTop - child.getTop());
    }

    nestedScrollingChildRef = new WeakReference<>(findScrollingChild(child));
    return true;
}