LinearLayout col1 = (LinearLayout)findViewById(R.id.col1);
Button btn = new Button(this);
btn.setOnClickListener(new OnClickListener() {
    public void onClick(View v) {
        LinearLayout col1 = (LinearLayout)findViewById(R.id.col1);
        if(col1.getFocusedChild() != null) {
            Log.d(TAG, col1.getFocusedChild().toString());
        }
    }
});
col1.addChild(btn);

if(yourChildView.isFocussed){
       yourChildView.setFocussable(false);
}