Android材质按钮采用颜色为主色而不是颜色强调色 [英] Android material button taking color primary instead of color accent

问题描述

我的布局按钮为-

<com.google.android.material.button.MaterialButton
  android:id="@+id/save_button"
  style="@style/buttonView"
  android:text="Save"
  app:layout_constraintBottom_toBottomOf="parent"
  app:layout_constraintStart_toStartOf="parent" />

在我的styles.xml中，我有-

<style name="buttonView" parent="Theme.MyTheme">
        <item name="android:layout_width">match_parent</item>
        <item name="android:layout_height">wrap_content</item>
        <item name="android:layout_marginStart">16dp</item>
        <item name="android:layout_marginLeft">16dp</item>
        <item name="android:layout_marginTop">16dp</item>
        <item name="android:layout_marginEnd">16dp</item>
        <item name="android:layout_marginRight">16dp</item>
    </style>

在我的themes.xml中，我有-

<resources xmlns:tools="http://schemas.android.com/tools">
    <!-- Base application theme. -->
    <style name="Theme.MyTheme" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
        <!-- Primary brand color. -->
        <item name="colorPrimary">@color/purple_500</item>
        <item name="android:textColorPrimary">@color/black</item>
        <item name="colorPrimaryVariant">@color/purple_700</item>
        <item name="colorOnPrimary">@color/white</item>
        <!-- Secondary brand color. -->
        <item name="colorSecondary">@color/teal_200</item>
        <item name="colorSecondaryVariant">@color/teal_700</item>
        <item name="colorOnSecondary">@color/black</item>
        <!--- Accent color. -->
        <item name="colorAccent">@color/red</item>
        <!-- Status bar color. -->
        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant
        </item>
        <!-- Customize your theme here. -->
    </style>
</resources>

根据Android文档，所有UI元素(例如FAB，textview，edit text，button)都带有颜色.因此，我希望我的按钮默认采用colorAccent，但是为什么要采用colorPrimary.我做错什么了吗?

As per the Android documentation all the UI elements such as FAB, textview, edit text, button take the color accent. So I expect my button to take the colorAccent by default but why does it take colorPrimary. Am I doing anything wrong?

推荐答案

您可以检查填充的按钮具有基于 colorPrimary 的backgroundTint.
同样，在您的buttonView样式中，您应该扩展所提供的样式之一:

The filled button has the backgroundTint based on the colorPrimary.
Also in your buttonView style you should extend one of the provided styles:

Default style           Widget.MaterialComponents.Button
Icon style              Widget.MaterialComponents.Button.Icon
Unelevated style.       Widget.MaterialComponents.Button.UnelevatedButton
Unelevated icon style   Widget.MaterialComponents.Button.UnelevatedButton.Icon

示例:

<style name="buttonView" parent="Widget.MaterialComponents.Button">

</style>

如果要更改背景颜色，可以:

If you want to change the background color you can:

• 以自定义样式使用backgroundTint属性

使用 materialThemeOverlay (最佳解决方案)

Override the colorPrimary attribute in your custom style using the materialThemeOverlay (best solution)

示例:

<style name="buttonView"parent="Widget.MaterialComponents.Button">
   <item name="materialThemeOverlay">@style/CustomButtonThemeOverlay</item>
</style>

<style name="CustomButtonThemeOverlay">
  <item name="colorPrimary">@color/...</item>
</style>

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