java – Android – 如何以编程方式创建FAB？

我有一个充满自定义视图的应用程序.当我尝试以编程方式创建FAB时,它会抛出错误

Caused by: java.lang.IllegalArgumentException: You need to use a Theme.AppCompat theme (or descendant) with the design library.

这是我的代码.

private FloatingActionButton getFAB() {
    FloatingActionButton fab = new FloatingActionButton(getContext());
    fab.setBackgroundDrawable(ContextCompat.getDrawable(getContext(), R.drawable.ic_add_white_24dp));
    return fab;
}

这是我的应用主题.

    <!-- Base application theme. -->
<style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
    <!-- Customize your theme here. -->
</style>

请帮我.

解决方法:

通过使用主题包装器修复.但是我仍然对使用ContextThemeWrapper感到惊讶

private FloatingActionButton getFAB() {
    Context context = new android.support.v7.internal.view.ContextThemeWrapper(getContext(), R.style.AppTheme);
    FloatingActionButton fab = new FloatingActionButton(context);
    return fab;
}