Android Lollipop，从工具栏中的标题添加弹出菜单 [英] Android Lollipop, add popup menu from title in toolbar

问题描述

我无法看到从标题添加弹出菜单是如何完成的，就像许多材料设计示例中所示.任何帮助将不胜感激.

I'm unable to see how adding a popup menu from the title is accomplished like is shown in many of the material design examples. Any help would be much appreciated.

推荐答案

您将需要向工具栏添加一个微调器:

You're going to need to add a Spinner to the Toolbar:

<android.support.v7.widget.Toolbar
        android:id="@+id/toolbar"
        android:layout_height="?attr/actionBarSize"
        android:layout_width="match_parent"
        android:background="?attr/colorPrimary">

    <Spinner
            android:id="@+id/spinner_nav"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />

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

然后您需要禁用默认标题:

You will then need to disable the default title:

Toolbar toolbar = findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayShowTitleEnabled(false);

然后，您可以根据需要在 Activity/Fragment 中检索和设置 Spinner.

You can then retrieve and setup the Spinner as needed in your Activity/Fragment.

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