以编程方式设置工具栏layout_collapseMode

Question

有什么办法可以通过编程方式更改我的android.support.v7.widget.Toolbar layout_collapseMode属性吗？

<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="?attr/actionBarSize"
    app:layout_collapseMode="pin"
    app:theme="@style/ToolBarTheme"
    app:popupTheme="@style/ThemeOverlay.AppCompat.Light">

</android.support.v7.widget.Toolbar>

Answer 1

试试这个

ViewGroup.LayoutParams params = toolbar.getLayoutParams();
CollapsingToolbarLayout.LayoutParams newParams;
if (params instanceof CollapsingToolbarLayout.LayoutParams) {
  newParams = (CollapsingToolbarLayout.LayoutParams)params;
} else {
  newParams = new CollapsingToolbarLayout.LayoutParams(params);
}
newParams.setCollapseMode(CollapsingToolbarLayout.LayoutParams.COLLAPSE_MODE_OFF);
toolbar.setLayoutParams(newParams);
toolbar.requestLayout();

https://developer.android.com/reference/android/support/design/widget/CollapsingToolbarLayout.LayoutParams.html