How to change background Color of Alert Dialog in android studio? How to change Button Colors of Alert Dialog in android studio? Custom Alert Dialog.

XML Code:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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"
tools:context=".MainActivity">

<Button
android:id="@+id/clickMe"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Click me"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintLeft_toLeftOf="parent"
app:layout_constraintRight_toRightOf="parent"
app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

JAVA Resource:

Clickme.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
android.app.AlertDialog.Builder builder = new AlertDialog.Builder(MainActivity.this);
builder.setTitle("Alert");
builder.setMessage("Hello this is tutorial about how to change background color of Alert Dialog");
builder.setCancelable(false);
builder.setPositiveButton("Yes", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
//do your own action
}
});
builder.setNegativeButton("No", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
//creat alert dialog and to change background
AlertDialog dialog=builder.create();
dialog.setOnShowListener(new DialogInterface.OnShowListener() {
@Override
public void onShow(DialogInterface abc) {
// we will code to change background color of dialog
dialog.getWindow().setBackgroundDrawableResource(R.color.purple_200);
//to change colors of button
dialog.getButton(AlertDialog.BUTTON_POSITIVE).setTextColor(getResources().getColor(R.color.black));
dialog.getButton(AlertDialog.BUTTON_NEGATIVE).setTextColor(getResources().getColor(android.R.color.holo_red_light));


//now run and see result

}
});
dialog.show();

}
});