Android默认按钮颜色 [英] Android default button color

问题描述

当我打开一个新的android studio项目时，按钮的默认颜色为紫色.我希望默认颜色为灰色默认按钮颜色(我想您知道我的意思).我试图通过xml和java更改颜色，但没有任何效果.我希望默认按钮颜色为灰色，而不必每次都更改.

When I open a new android studio project, the default color for button is purple. I want the default color to be the gray default button color(I assume you know what I mean). I tried to change the color via xml and java and nothing worked. I want that the default button color will be gray without I'd have to change it every time.

themse.xml:

themse.xml:

<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="Theme.HangmanGame" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
    <!-- Primary brand color. -->
    <item name="colorPrimary">@color/purple_500</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>
    <!-- Status bar color. -->
    <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
    <!-- Customize your theme here. -->
</style>

themes.xml(晚上)

themes.xml(night)

<resources xmlns:tools="http://schemas.android.com/tools">
<!-- Base application theme. -->
<style name="Theme.HangmanGame" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
    <!-- Primary brand color. -->
    <item name="colorPrimary">@color/purple_200</item>
    <item name="colorPrimaryVariant">@color/purple_700</item>
    <item name="colorOnPrimary">@color/black</item>
    <!-- Secondary brand color. -->
    <item name="colorSecondary">@color/teal_200</item>
    <item name="colorSecondaryVariant">@color/teal_200</item>
    <item name="colorOnSecondary">@color/black</item>
    <!-- Status bar color. -->
    <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
    <!-- Customize your theme here. -->
</style>

推荐答案

由于您使用的是 Theme.MaterialComponents.* 主题，因此的默认背景色> Button (由 MaterialButton 替换)是应用主题中定义的 colorPrimary .
就您而言:

Since you are using a Theme.MaterialComponents.* theme the default background color of the Button (which is replaced by a MaterialButton) is the colorPrimary defined in your app theme.
In your case:

<item name="colorPrimary">@color/purple_500</item>

您可以更改此值(但这会影响所有小部件).

You can change this value (but this will affect all widgets).

如果要全局更改应用程序中的按钮样式，还可以在应用程序主题中添加 materialButtonStyle 属性:

If you want to change globally the button style in your app you can also add the materialButtonStyle attribute in your app theme:

<style name="Theme.HangmanGame" parent="Theme.MaterialComponents.DayNight.DarkActionBar">
   <item name="materialButtonStyle">@style/Widget.App.Button</item>
</style>

具有:

<style name="Widget.App.Button" parent="Widget.MaterialComponents.Button">
    <item name="backgroundTint">@color/...</item>
</style>

如果只想在按钮中更改此颜色，则还可以使用 app:backgroundTint 属性删除 android:background 属性:

If you want to change this color only in the button you can use also the app:backgroundTint attribute removing the android:background attribute:

<Button
    app:backgroundTint="@color/..."/>

如果您想使用 android:background 属性使用自定义背景，则必须添加 app:backgroundTint ="@ null" 以避免按钮被着色.

If you want to use a custom background using the android:background attribute you have to add app:backgroundTint="@null" to avoid that the button is tinted.

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