给BottomSheetDialog 设置默认高度，全屏显示

	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;
        }

private View wrapInBottomSheet(int layoutResId, View view, LayoutParams params) {
        FrameLayout container = (FrameLayout)View.inflate(this.getContext(), layout.design_bottom_sheet_dialog, (ViewGroup)null);
        CoordinatorLayout coordinator = (CoordinatorLayout)container.findViewById(id.coordinator);
        if (layoutResId != 0 && view == null) {
            view = this.getLayoutInflater().inflate(layoutResId, coordinator, false);
        }

        FrameLayout bottomSheet = (FrameLayout)coordinator.findViewById(id.design_bottom_sheet);
        this.behavior = BottomSheetBehavior.from(bottomSheet);
        this.behavior.setBottomSheetCallback(this.bottomSheetCallback);
        this.behavior.setHideable(this.cancelable);
        if (params == null) {
            bottomSheet.addView(view);
        } else {
            bottomSheet.addView(view, params);
        }
	............
    }

BottomSheetBehavior mBehavior = BottomSheetBehavior.from((View)getView().getParent());
mBehavior.setPeekHeight(1000); //设置默认高度，折叠态

//设置默认全屏
mBehavior.setState(BottomSheetBehavior.STATE_EXPANDED) //设置为展开状态
mBehavior.setKipCollapsed(true)  //设置下滑跳过折叠态

给layout xml中设置 minHeight   (大于屏幕高度)
BottomSheetBehavior mBehavior = BottomSheetBehavior.from((View)getView().getParent());
mBehavior.skipCollapsed = true
mBehavior.state=BottomSheetBehavior.STATE_EXPANDED;