How to change Alert Dialog button text color - Android Studio - Kotlin

In this example, we will display Alert Dialog  on button click and change the alert dialog buttons text color. See the following example:

activity_main.xml

Add the following code in the activity_main.xml file.

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:app="http://schemas.android.com/apk/res-auto"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    android:layout_margin="15dp"    tools:context=".MainActivity">

        <Button            android:id="@+id/btn_alert_dialog"            android:layout_marginTop="10dp"            android:background="@color/colorAccent"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:textAllCaps="false"            android:textColor="#000000"            android:text="Alert Dialog"/>

</LinearLayout>
Add following code into styles.xml:  res-> values-> style.xml
styles.xml
Add the following code in the styles.xml file.
<resources>
    <!-- Base application theme. -->    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <!-- Customize your theme here. -->        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>
    </style>

    <!--Alert Dialog Color -->    <style name="AlertDialog_Button_color" parent="Theme.AppCompat.Light.Dialog.Alert">
        <item name="buttonBarPositiveButtonStyle">@style/positive_btn_color</item>
        <item name="buttonBarNegativeButtonStyle">@style/negative_btn_color</item>
        <item name="buttonBarNeutralButtonStyle">@style/neutral_btn_color</item>
    </style>

    <style name="positive_btn_color">
        <item name="android:textColor">#000000</item>
    </style>
    <style name="negative_btn_color">
        <item name="android:textColor">#FA8072</item>
    </style>
    <style name="neutral_btn_color">
        <item name="android:textColor">#00FF00</item>
    </style>

</resources>

MainActivity.kt
Add the following code in the MainActivity.kt class.
package com.study.kotlinkatta
import android.os.Bundle
import android.widget.*
import androidx.appcompat.app.AlertDialog
import androidx.appcompat.app.AppCompatActivity

class MainActivity : AppCompatActivity() {

    lateinit var btn_alert_dialog: Button

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        btn_alert_dialog = findViewById(R.id.btn_alert_dialog)
        btn_alert_dialog.setOnClickListener {          func_alert_dialog();
        }    }

    private fun func_alert_dialog() {
        val builder = AlertDialog.Builder(this,R.style.AlertDialog_Button_color)
        builder.setTitle("Alert Dialog(Kotlin)")
        builder.setMessage("Set Button Text Color")
        builder.setIcon(android.R.drawable.ic_dialog_alert)

        //performing positive action        builder.setPositiveButton("Yes"){dialogInterface, which ->            Toast.makeText(applicationContext,"clicked yes",Toast.LENGTH_LONG).show()
        }        //performing cancel action        builder.setNeutralButton("Cancel"){dialogInterface , which ->            Toast.makeText(applicationContext,"clicked cancel",Toast.LENGTH_LONG).show()
        }        //performing negative action        builder.setNegativeButton("No"){dialogInterface, which ->            Toast.makeText(applicationContext,"clicked No",Toast.LENGTH_LONG).show()
        }        // Create the AlertDialog        val alertDialog: AlertDialog = builder.create()
        alertDialog.setCancelable(false)
        alertDialog.show()
    }
}
Output: