在CollapsingToolbarLayout中移动按钮

<android.support.design.widget.CoordinatorLayout>
    <android.support.design.widget.AppBarLayout>
        <android.support.design.widget.CollapsingToolbarLayout>
            <android.support.v7.widget.Toolbar/>
            <!-- 添加需要移动的按钮或其他视图 -->
            <Button/>
        </android.support.design.widget.CollapsingToolbarLayout>
    </android.support.design.widget.AppBarLayout>
    <!-- 添加其他内容 -->
</android.support.design.widget.CoordinatorLayout>

CoordinatorLayout.LayoutParams layoutParams = (CoordinatorLayout.LayoutParams) button.getLayoutParams();
AppBarLayout.ScrollingViewBehavior behavior = (AppBarLayout.ScrollingViewBehavior) layoutParams.getBehavior();
behavior.setOverlayTop(0); // 设置按钮在完全展开时的位置
behavior.setOverlayTop(100); // 设置按钮在折叠时的位置

AppBarLayout appBarLayout = findViewById(R.id.appBarLayout);
appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() {
    @Override
    public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) {
        // 根据verticalOffset的值来判断折叠状态，改变按钮的位置
    }
});