主题警报对话框按钮

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最佳答案

I figured out what was causing this problem. I need to use different AlertDialog class:

androidx.appcompat.app.AlertDialog

When I switched to this everything started working as expected. Here's where I found the solution:

https://github.com/material-components/material-components-android/issues/162

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Found another solution for this with using MaterialComponents here: https://issuetracker.google.com/issues/116861837#comment9

<style name="Theme.Custom.Material.Alert.Dialog.Light" parent="Theme.MaterialComponents.Light.Dialog.Alert">
<item name="materialButtonStyle">@style/Widget.AppCompat.Button.Borderless</item>
</style>


<style name="Theme.Custom.Material.Base.Light" parent="Theme.MaterialComponents.Light.NoActionBar">
<item name="android:dialogTheme">@style/Theme.Custom.Material.Alert.Dialog.Light</item>
<item name="android:alertDialogTheme">@style/Theme.Custom.Material.Alert.Dialog.Light</item>
....
</style>

Though it is still not "intended behavior" to me.

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When using com.google.android.material:material:1.0.0 and androidx.appcompat.app.AlertDialog you can customize each button in the buttonBar by using Widget.MaterialComponents.Button.TextButton as parent.

val builder: AlertDialog.Builder = AlertDialog.Builder(ContextThemeWrapper(context, R.style.AlertDialogTheme))

Use the default layout or add a custom by builder.setView(R.layout.my_dialog)

In your styles:

<style name="AlertDialogTheme" parent="Theme.MaterialComponents.Light.Dialog.Alert">
<item name="buttonBarPositiveButtonStyle">@style/Alert.Button.Positive</item>
<item name="buttonBarNegativeButtonStyle">@style/Alert.Button.Neutral</item>
<item name="buttonBarNeutralButtonStyle">@style/Alert.Button.Neutral</item>
</style>


<style name="Alert.Button.Positive" parent="Widget.MaterialComponents.Button.TextButton">
<item name="backgroundTint">@color/transparent</item>
<item name="rippleColor">@color/colorAccent</item>
<item name="android:textColor">@color/colorPrimary</item>
<item name="android:textSize">14sp</item>
<item name="android:textAllCaps">false</item>
</style>


<style name="Alert.Button.Neutral" parent="Widget.MaterialComponents.Button.TextButton">
<item name="backgroundTint">@color/transparent</item>
<item name="rippleColor">@color/colorAccent</item>
<item name="android:textColor">@color/gray_dark</item>
<item name="android:textSize">14sp</item>
</style>

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If you are using the com.android.support:design:28.0.0 library, using android.support.v7.app.AlertDialog works as expected.

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If you don't want to use androidx.appcompat.app.AlertDialog, you can just redefine the style of the dialog buttons:

In your style.xml :

<style name="AppTheme" parent="Theme.MaterialComponents.Light.NoActionBar">
...
<item name="android:buttonBarButtonStyle">@style/DialogButton</item>
...
</style>


<style name="DialogButton" parent="Widget.MaterialComponents.Button.TextButton"/>

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If you are using the Material Components library the best way to have an AlertDialog is to use the MaterialAlertDialogBuilder.

new MaterialAlertDialogBuilder(context)
.setTitle("Dialog")
.setMessage("Lorem ipsum dolor ....")
.setPositiveButton("Ok", /* listener = */ null)
.setNegativeButton("Cancel", /* listener = */ null)
.show();

It is the default result:

If you want also to apply a different style or color to the buttons you can check this answer.

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First, it's better to use use MaterialAlertDialog if you are using Material Theme.

You can read more here – Material.io → Theming dialogs

MaterialAlertDialogBuilder(context)
.setTitle(R.string.confirm)
.setMessage(R.string.logout)
.setPositiveButton(R.string.logout_alert_positive) { _, _ -> activity?.logout() }
.setNegativeButton(R.string.never_mind, null)
.show()

This is the layout.xml of the MaterialAlertDialog actions. As you can see there are 3 buttons and each has their own styles. So, here is how you can change them.

Step 1: Tell Android that you want to alter the default MaterialAlertDialog theme.

<style name="Base.AppTheme" parent="Theme.MaterialComponents.DayNight.NoActionBar">
...
<item name="materialAlertDialogTheme">@style/AlertDialog</item>
...
</style>

Step 2: Tell Android that you want to alter a specific button style. buttonBarNeutralButtonStyle, buttonBarNegativeButtonStyle or buttonBarPositiveButtonStyle

<style name="AlertDialog" parent="ThemeOverlay.MaterialComponents.MaterialAlertDialog">
<item name="buttonBarNegativeButtonStyle">@style/NegativeButtonStyle</item>
</style>

Step 3: Define your custom style

<style name="NegativeButtonStyle" parent="Widget.MaterialComponents.Button.TextButton">
<item name="android:textColor">#FF0000</item>
</style>

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I tested the above answers. Although I got a good idea, none worked for my case. So, this is my answer.

Make sure to have android:theme="@style/AppMaterialTheme" in your manifest file under Application or Activity.

Open your Styles.xml file and change it based on the following.

<style name="AppMaterialTheme" parent="Theme.MaterialComponents.DayNight.NoActionBar">
<item name="colorPrimary">@color/primaryBlue</item>
<item name="colorPrimaryDark">@color/primaryBlue</item>
<item name="colorAccent">@color/colorAccent</item>
<item name="colorControlActivated">@color/primaryBlue</item>
<item name="colorControlHighlight">@color/colorAccent_main</item>
<item name="colorButtonNormal">@color/white</item>


<item name="materialAlertDialogTheme">@style/AlertDialogMaterialTheme</item>
</style>


<style name="AlertDialogMaterialTheme" parent="ThemeOverlay.MaterialComponents.MaterialAlertDialog">
<item name="buttonBarPositiveButtonStyle">@style/Alert.Button.Positive</item>
<item name="buttonBarNegativeButtonStyle">@style/Alert.Button.Negative</item>
</style>


<style name="Alert.Button.Positive" parent="Widget.MaterialComponents.Button.UnelevatedButton">
<item name="android:fillColor">@color/color_0054BB</item>
<item name="android:textColor">@color/white</item>
<item name="android:textAllCaps">false</item>
<item name="android:textSize">14sp</item>
<item name="rippleColor">@color/colorAccent_main</item>
</style>


<style name="Alert.Button.Negative" parent="Widget.MaterialComponents.Button.OutlinedButton">
<item name="strokeColor">@color/color_0054BB</item>
<item name="android:textColor">@color/color_0054BB</item>
<item name="android:textAllCaps">false</item>
<item name="android:textSize">14sp</item>
<item name="android:layout_marginEnd">8dp</item>
<item name="rippleColor">@color/colorAccent_main</item>
</style>

You won't need to apply the theme to your AlertDialog as your Activity applies the theme to it. So, create the dialog normally.

The result will be.