Can an AlertDialog be customized with buttons and that these work as the default ones?

I think what you're looking for is to overwrite the AlertDialog.Builder's methods. by extending this you can overwrite the setNegativeButton, setNeutralButton and setPositiveButton.

Sorry if it is not, what happens is that reading the others and seeing that you tell them that is not .. I can only assume that this is what you are looking for

public class AlertBuilderCustom extends AlertDialog.Builder {
protected AlertBuilderCustom(Context context) {
    super(context);
}

@Override
public AlertDialog.Builder setPositiveButton(int textId, DialogInterface.OnClickListener listener) {
    return super.setPositiveButton(textId, listener);
}

@Override
public AlertDialog.Builder setNegativeButton(int textId, DialogInterface.OnClickListener listener) {
    return super.setNegativeButton(textId, listener);
}

@Override
public AlertDialog.Builder setNeutralButton(int textId, DialogInterface.OnClickListener listener) {
    return super.setNeutralButton(textId, listener);
}

}

After overwriting and at the end you can give the dismiss instruction as others have indicated.

greetings and good energy:)

I show you how you could create a custom dialog box in Android Studio with Java. I'll link to the site reference Android Developer on how to do it.

1). Our custom Layout

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content">
    <ImageView
        android:src="@drawable/header_logo"
        android:layout_width="match_parent"
        android:layout_height="64dp"
        android:scaleType="center"
        android:background="#3a33ff"
        android:contentDescription="@string/app_name" />
    <EditText
        android:id="@+id/username"
        android:inputType="textEmailAddress"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="16dp"
        android:layout_marginLeft="4dp"
        android:layout_marginRight="4dp"
        android:layout_marginBottom="4dp"
        android:hint="@string/username" />
    <EditText
        android:id="@+id/password"
        android:inputType="textPassword"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_marginTop="4dp"
        android:layout_marginLeft="4dp"
        android:layout_marginRight="4dp"
        android:layout_marginBottom="16dp"
        android:fontFamily="sans-serif"
        android:hint="@string/password"/>
    <LinearLayout android:orientation="horizontal"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <Button android:id="@+id/btn_fire"
            android:text="@string/fire"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
        <Button android:id="@+id/btn_cancel"
            android:text="@string/cancel"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content" />
    </LinearLayout>
</LinearLayout>

2). We create a method to create our Custom Dialog

public AlertDialog createCustomDialog(){
        final AlertDialog alertDialog;
        final AlertDialog.Builder builder = new AlertDialog.Builder(this);
        // Get the layout inflater
        LayoutInflater inflater = getLayoutInflater();
        // Inflar y establecer el layout para el dialogo
        // Pasar nulo como vista principal porque va en el diseño del diálogo
        View v = inflater.inflate(R.layout.dialog_signin, null);
        //builder.setView(inflater.inflate(R.layout.dialog_signin, null))
        Button btnFire = (Button)v.findViewById(R.id.btn_fire);
        Button btnCancel = (Button)v.findViewById(R.id.btn_cancel);
        builder.setView(v);
        alertDialog = builder.create();
        // Add action buttons
                btnFire.setOnClickListener(
                        new View.OnClickListener() {
                            @Override
                            public void onClick(View v) {
                                // Aceptar
                                alertDialog.dismiss();
                            }
                        }
                );
                btnCancel.setOnClickListener(
                        new View.OnClickListener() {
                            @Override
                            public void onClick(View v) {
                                alertDialog.dismiss();
                            }
                        }
                );
        return alertDialog;

3). When it comes to calling ...

createCustomDialog().show();

And a capture of how it would be ..

P.d. I think that is what you are looking for. Also, I think you have already received a good response from them. I only spend everything in the same method to make it clearer. Greetings !!

If you can customize a AlertDialog .

In this case you get the references of the buttons, to these buttons you can assign them a listener:

 Positivo = view.FindViewById<Button>(Resource.Id.AlertDialog_Positivo);
 Negativo = view.FindViewById<Button>(Resource.Id.AlertDialog_Negativo);

Positivo.setOnClickListener(new OnClickListener() {
    public void onClick(View v) {

        // Botón positivo.
        alertDialog.dismiss();

    }
});

Negativo.setOnClickListener(new OnClickListener() {
    public void onClick(View v) {

        // Botón negativo.

    }
});

Based on your code this would be an example that creates a% custom_co_de%:

private void createCustomDialog(){
    LayoutInflater layoutInflater = LayoutInflater.from(this);

    //Load Layout custom_alertdialog.xml
    View promptView = layoutInflater.inflate(R.layout.custom_alertdialog, null);
    final AlertDialog alertDialog = new AlertDialog.Builder(this).create();

    Button btnNegative = (Button) promptView.findViewById(R.id.AlertDialog_Negativo);
    Button btnPositive = (Button) promptView.findViewById(R.id.AlertDialog_Positivo);

    btnNegative.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            Log.d("AlertDialog", "btnNegative");
            alertDialog.dismiss();

        }
    });

    btnPositive.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {

            Log.d("AlertDialog", "btnPositive");

        }
    });

    alertDialog.setView(promptView);
    alertDialog.show();

}