Question

我需要能够从＆＃34; center＆＃34;更改FAB的app:layout_anchorGravity="center"。到＆＃34;底部|开始＆＃34;从代码。我找到了这个例子：

CoordinatorLayout.LayoutParams p = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
    p.setAnchorId(xxxx);

    fab.setLayoutParams(p);

但是它用于设置锚点而不是锚点引力。

Answer 1

CoordinatorLayout.LayoutParams类具有anchorGravity字段。例如：

FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
CoordinatorLayout.LayoutParams lp = (CoordinatorLayout.LayoutParams) fab.getLayoutParams();
lp.anchorGravity = Gravity.BOTTOM | GravityCompat.START;
fab.setLayoutParams(lp);

Answer 2

与科特林相同

        (rightUglyBox.layoutParams as CoordinatorLayout.LayoutParams)
                       .anchorGravity 
                                     = Gravity.CENTER_VERTICAL or Gravity.LEFT;

*不仅适用于FAB，而且适用于所有布局

动态设置FAB锚点重力

2 个答案: