Cannot close a custom AlertDialog - android-studio

Question

so I have an app with three different buttons(parent buttons) on pressing any of them, the custom alert dialog with 9 different buttons is displayed but the functions of these 9 buttons within the alert dialog are different depending on which of the three parent buttons called it. On pressing any of the 9 buttons, I want the app to perform a particular function and then close the alertdialog. Now the problem is that I can easily call the alert dialog by calling the method showcustomdialog(); that I created but I can't dismiss it using alertdialog.dismiss(); inside the OnClickListener of the parent button since the method has a void result type. I've tried using if-else statements but it doesn't work. How can I achieve what is required?
The method:
private void showCustomDialog() {
ViewGroup viewGroup = findViewById(android.R.id.content);
View dialogView = LayoutInflater.from(this).inflate(R.layout.dialog_main2, viewGroup, false);
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setView(dialogView);
final AlertDialog alertDialog = builder.create();
alertDialog.show();
}
I am calling the meathod and using it as follows:
parentbutton1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
showCustomDialog();
alertbutton1.getId();
alertbutton1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
textView1.setText("500");
function();
//I want to dismiss the alertdialog here.
}
});
alertbutton2.getId();
alertbutton2.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
textView1.setText("1000");
function();
//I want to dismiss the alertdialog here.
}
});
and so on.

Answer 1

I figured out a solution for you using AlertDialog.
parentbutton1.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
createDialog();
}
});
Then the method MUST be a private or public AlertDialog:
private AlertDialog createDialog() {
LayoutInflater inflater = (getActivity()).getLayoutInflater(); // for fragment or getLayoutInflater(); for activity
View v = inflater.inflate(R.layout.dialog_add_new_list, null);
Button okButton = v.findViewById(R.id.confirm_button);
Button cancelButton = v.findViewById(R.id.cancel_button);
final AlertDialog dialog = new AlertDialog.Builder(getActivity()) // for fragment or AlertDialog.Builder ( this ) for activity
.setView(v)
.show();
okButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
}
});
cancelButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View p1) {
dialog.dismiss();
}
});
return dialog;
}
P.S. Replace the ids I used to create this sample with yours.