带有 AppCompat-v7 的工具栏和上下文操作栏 [英] Toolbar and Contextual ActionBar with AppCompat-v7

问题描述

我正在使用 Lollipop 和 AppCompat-v7 库中引入的新添加的工具栏.我按照 属性.在您的主题中设置:

true

并且操作模式将显示在操作栏上，而不是将其按下.(如果您没有使用最新的 AppCompat，那么您需要在属性中添加android:"前缀).它基本上让 AppCompat 知道你有一个位于屏幕顶部的工具栏，它应该在它上面绘制 ActionMode.

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旧答案/解决方法:

我遇到了同样的问题.无论我设置什么主题，它总是将我设置为 ActionBar 的 Toolbar 下推.我尝试过使用和不使用支持库，但没关系.

不幸的是我无法修复它，所以我已经建立了一个解决方法.在我的 ActionModeCallback 的 onCreateActionMode 中，我隐藏了操作栏:

actionBarToolbar.setVisibility(View.GONE);

然后在 onDestroyActionMode 中再次显示:

actionBarToolbar.setVisibility(View.VISIBLE);

隐藏/显示发生得如此之快，在我的测试设备上并不明显.当然有一个缺点:虽然进入动画仍然有效，但是上下文操作栏的退出动画会丢失，因为工具栏会立即弹出它.但在我们找到更好的解决方案之前，我想我们会一直坚持下去.

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(我的 Activity 实际上扩展了一个自定义的 BaseActivity 类，该类有一个名为 getActionBarToolbar() 的方法，取自 Google I/O 2014 应用程序源代码，所以我可以很容易地获取工具栏:

BaseActivity activity = (BaseActivity) getActivity();activity.getActionBarToolbar().setVisibility(View.GONE);

可惜 I/O 应用程序不使用上下文操作栏.)

I am working on using the newly added Toolbar that was introduced in Lollipop and the AppCompat-v7 library. I followed this guide on setting up the Toolbar I noticed that when you invoke something that will bring up the contextual ActionBar (such as highlighting text for copy/pasting), that it will push the Toolbar down on the page. You can see what I am talking about in the image at the bottom of the page:

So, essentially, I set it up like this. I have the Toolbar defined in an xml file that I use with include tags:

<android.support.v7.widget.Toolbar
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:id="@+id/toolbar"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="?attr/colorPrimary"/>

Then, I instantiate it in my view:

<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:id="@+id/root"
    tools:context=".MainActivity">

    <include
        layout="@layout/toolbar"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"/> 

    <!-- Rest of view -->

    </LinearLayout>

In code, I set it up like so:

    // On Create method of activity:
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

Does anyone know how to make it so that the Contextual ActionBar comes overtop of the Toolbar?

解决方案

Update:

Solution: use the windowActionModeOverlay property. Set this in your theme:

<item name="windowActionModeOverlay">true</item>

and the actionmode will be shown over the action bar instead of pushing it down. (If you're not using the latest AppCompat then you need to add the "android:" prefix to the property). It basically lets AppCompat know that you have a toolbar located in the top of the screen and that it should draw the ActionMode on top of it.

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Old answer/workaround:

I ran into the same problem. No matter what theme I set, it always pushes down the Toolbar I set as ActionBar. I tried with and without the support library, but it didn't matter.

Unfortunately I was not able to fix it so I have built a workaround instead. In my ActionModeCallback's onCreateActionMode I hide the action bar:

actionBarToolbar.setVisibility(View.GONE);

and in onDestroyActionModeI show it again:

actionBarToolbar.setVisibility(View.VISIBLE);

The hiding/showing happens so quickly it is not noticeable on my test devices. There is of course a downside: although the enter-animation still works, the exit-animation of the contextual action bar gets lost because the Toolbar immediately pops over it. But until we come across a better solution I guess we are stuck with this.

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(My Activity is actually extending a custom BaseActivity class which has a method called getActionBarToolbar(), taken from the Google I/O 2014 app source code, so I can easily get fetch the Toolbar:

BaseActivity activity = (BaseActivity) getActivity();
activity.getActionBarToolbar().setVisibility(View.GONE);

Too bad the I/O app does not use the contextual action bar.)

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