MaterialCardview需要Theme.AppCompat [英] MaterialCardview requires Theme.AppCompat

问题描述

我正在尝试测试我在新的Google Material组件上的技能. 但是现在我遇到MaterialCardView

I'm trying to test my skills on new Google Material components. But for now I am encountering a problem with MaterialCardView

构建过程告诉我

The style on this component requires your app theme to be Theme.AppCompat 
[..]
at com.google.android.material.card.MaterialCardView.<init>

通过这个线索，我添加了 style="@style/Theme.AppCompat"& android:theme="@style/Theme.AppCompat"到MaterialCardView以及清单中的我的活动".

With this clue I added style="@style/Theme.AppCompat" & android:theme="@style/Theme.AppCompat" to the MaterialCardView and also to my Activity in the manifest.

我也尝试将Acitivity更改为AppCompatActivity，但没有成功.

I tried also to change my Acitivity to AppCompatActivity but without any success.

我还尝试设置material.io文档中介绍的样式，但没有成功！

I also tried to set styles told by material.io documentation but without success !

您有一些线索吗?

谢谢

推荐答案

从材料组件1.1.0-alpha06开始，您需要执行以下操作:

As of Material Components 1.1.0-alpha06 you need to do this:

• 取决于库implementation 'com.google.android.material:material:1.1.0-alpha06'
• 您需要拥有compileSdkVersion 28
• 您的活动需要扩展AppCompatActivity(或使用AppCompatDelegate )
• 您必须使用材料组件"主题

• Depend on the library implementation 'com.google.android.material:material:1.1.0-alpha06'
• You'll need to have compileSdkVersion 28
• Your activity needs to extend AppCompatActivity (or use AppCompatDelegate)
• You have to use a Material Components theme

来源: https://github.com/material-components/material-components-android/blob/master/docs/getting-started.md

最简单的入门方法是将当前主题扩展为Theme.MaterialComponents.*.Bridge而不是Theme.AppCompat.*.

The easiest way to get started is for your current theme to extend Theme.MaterialComponents.*.Bridge instead of Theme.AppCompat.*.

此外，您需要在主题中覆盖以下属性，否则卡的颜色将为损坏:

Additionally you'll need to override the following attribute in your theme, otherwise the card color will be broken:

<style name="AppTheme" parent="Theme.MaterialComponents.Light.DarkActionBar.Bridge">
    <item name="elevationOverlaysEnabled">false</item>
</style>

请勿在卡上设置android:theme="@style/Theme.MaterialComponents".卡中每个小部件上的主题都会丢失颜色信息(主要，次要，重点...).

Don't set android:theme="@style/Theme.MaterialComponents" on the card. You'll lose color information (primary, secondary, accent,...) from your theme on every widget inside the card.

请勿在卡上设置style="@style/Theme.MaterialComponents. 不要混合主题和样式.

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