Android笔记：如何解决java中的setPeekHeight（）没有给出与xml中相同的结果？

<include
        android:layout_height="wrap_content"
        android:layout_width="wrap_content"
        layout="@layout/layout_book"

        app:layout_behavior="@string/bottom_sheet_behavior"
        app:behavior_peekHeight="0dp"
        />

<dimen name="peek_height">120dp</dimen>

int peekHeightPx = context.getResources().getDimensionPixelSize(R.dimen.peek_height);
bottomSheetBehavior.setPeekHeight(peekHeightPx);

int peekHeightPx = (int) (context.getResources().getDisplayMetrics().density * 120);
bottomSheetBehavior.setPeekHeight(peekHeightPx);