for (int i = 0; i < bmb.getPiecePlaceEnum().pieceNumber(); i++) {
    SimpleCircleButton.Builder builder = new SimpleCircleButton.Builder()
            .listener(new OnBMClickListener() {
                @Override
                public void onBoomButtonClick(int index) {
                    // When the boom-button corresponding this builder is clicked.
                    Toast.makeText(SimpleCircleButtonActivity.this, "Clicked " + index, Toast.LENGTH_SHORT).show();
                }
            });
    bmb.addBuilder(builder);
}

// Use OnBoomListener to listen all methods
bmb.setOnBoomListener(new OnBoomListener() {
    @Override
    public void onClicked(int index, BoomButton boomButton) {
        // If you have implement listeners for boom-buttons in builders,
        // then you shouldn't add any listener here for duplicate callbacks.
    }
    @Override
    public void onBackgroundClick() {
        textViewForAnimation.setText("Click background!!!");
    }
    @Override
    public void onBoomWillHide() {
        textViewForAnimation.setText("Will RE-BOOM!!!");
    }
    @Override
    public void onBoomDidHide() {
        textViewForAnimation.setText("Did RE-BOOM!!!");
    }
    @Override
    public void onBoomWillShow() {
        textViewForAnimation.setText("Will BOOM!!!");
    }
    @Override
    public void onBoomDidShow() {
        textViewForAnimation.setText("Did BOOM!!!");
    }
});

// Use OnBoomListenerAdapter to listen part of methods
bmb.setOnBoomListener(new OnBoomListenerAdapter() {
    @Override
    public void onBoomWillShow() {
        super.onBoomWillShow();
        // logic here
    }
});

bmb.isBoomed();    // Whether the BMB is boomed.
bmb.isReBoomed();  // Whether the BMB is re-boomed.

bmb.setBackPressListened(false);

app:bmb_backPressListened="false"