Android - Making TextView Scrollable

I am displaying text in a textview that appears to be too long to fit into one screen. I need to make my TextView scrollable. How can i do that? Here is the code final TextView tv = new TextView(this);

tv.setBackgroundResource(R.drawable.splash);
tv.setTypeface(face);
tv.setTextSize(18);
tv.setTextColor(R.color.BROWN);

tv.setGravity(Gravity.CENTER_VERTICAL| Gravity.CENTER_HORIZONTAL);

tv.setOnTouchListener(new OnTouchListener(){


public boolean onTouch(View v, MotionEvent e)
{

Random r = new Random();
int i = r.nextInt(101);

if (e.getAction() == e.ACTION_DOWN)
{
tv.setText(tips[i]);
tv.setBackgroundResource(R.drawable.inner);

}

return true;
}

});

setContentView(tv);

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