How to disable all buttons in a Layout?

Issue

The way app works is the following: App prompts 30 buttons to user and user may guess the right ones by tapping. When user taps some button all the buttons (say a view containing these buttons) should be locked while corresponding (right or wrong guess) animation is playing. Tapped button by itself should be disabled till the next round. After animation is finished all not tapped previously buttons (say a view containing these buttons) should be available again.
So I have a Layout which includes another layout with these 30 buttons:

...
    <RelativeLayout
        android:id="@+id/alphabetContainer"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">

        <include layout="@layout/alphabet" />
    </RelativeLayout>
...

Now I need to lock the buttons from being clicked and then unlock. So I tried:

...
private RelativeLayout alphabetPanel;
...
public void onCreate(){
...
alphabetPanel = (RelativeLayout) findViewById(R.id.alphabetContainer);
...
}
...
private void lockButtons(){
alphabetPanel.setEnabled(false);
}

but this doesn't lock buttons. I also tried:

alphabetPanel.setFocusable(false);
alphabetPanel.setClickable(false);

Doesn't help either. Seems like it all relies only to a layout by itself but not the views it contains.
Also I tried to add a fake layout to place it over layout with buttons by bringing it to the front. This is a workaround and its tricky cuz both layouts must be placed inside a RelativeLayout only:

...
        blockingLayout = new RelativeLayout(this);
        blockingLayout.setLayoutParams(alphabetPanel.getLayoutParams());
...

but this works very strange: somehow both layouts in this case appears and disappears every second or so or doesn't appear at all - I cant understand that at all cuz there is no setVisibility() method used in code!
The only one way left is to iterate every view (button) to make it disabled and than back.
Is there any other way?
UPDATE
Finally I had to add a "wall"-layout into the xml. Now by making it clickable and focusable it becomes a solution.

Solution

I used extension to lock and unlock the view

//lock
fun View.lock() {
isEnabled = false
isClickable = false}
//unlock
fun View.unlock() {
isEnabled = true
isClickable = true}

if you want to lock all children of the view group

//lock children of the view group
fun ViewGroup.lockAllChildren() {
views().forEach { it.lock() }}

//unlock children of the view group
fun ViewGroup.unlockAllChildren() {
views().forEach { it.unlock() }}

Answered By - Zohidjon Akbarov