Question

Like in topic – I want to create activity above tabHost that I already have.

I have button inside one of the tab and after click event I want to create activity that will overlay tabHost.

Another question is how to make it on application launch (It has to be hidden sometimes).

Answer 1

Try this

final (Button) yourButton = (Button)getViewById(R.id.your_button);  
    yourButton.setOnClickListener(new OnClickListener()
    {
        public void onClick(View v)
        {
            Intent intent = new Intent(v.getContext(), YourActivity.class);
            startActivityForResult(intent, 0);
        }
    });

YourActivity is the activity you wish start.